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SMITHSONIAN MISCEIIAXEOIS COLLECTIONS.

171 ^ ^_-_

t

MOXOGllAPIIS

OP TUE

D I P T E R A

OF

NORTH AMERICA.

PREPAUED FOR THE SMITHSONIAN INSTITUTION

BY

H. ' I. OE W.

PART IK.

KDITKD BV

R. OSTEN SAC KEN,

WASHINGTON:

SMITIISONIAX INSTITUTION.

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aj)Vi:uti8i:mknt.

TiiK jtroscnt i)ii1)li('atit)n is tlic sccoiid part of a Wi.rk on \ort1i
Aiui-'ricjiii Diptcrii in pntccss of prcpiiration )iy Dr. Jl. Tioew, uf
Mcsoritz, Priissi", uiitlcrliiki'ii at llie ospi-cinl riMpiost of tlio
Siiiithsoiiian J lis.. tut ion. 'I'lic nnilcrials liavc Im-cu dcrivoU i)nn-

<''I»''"y f' I til*' collcrtii.n (.1' 15ai-i.u II. Ostcii Sacivon, Consiil-

(jciHTal of Ifussia in New V.nk, kindly inlrustt'd to the author
fill" t'xaniination.

Tiic work will appear in monographs of jrcnt-ra and funulios,
suiliciciit nnilcrials liciiiu- on hand for illustratin«r particular groups
tnily. AiitliDiit rcla'ion to their systeniatic sfMpicnce.

Tiic Institution is under oltlii-at ions to J5aron Osten Saeken for
Miperintendinn- the translation ..f the work from the German manu-

^••ripT, ami ediliii-,^ it, as well as for eorreetin.u- the jtroof-sl (s.

JOSKIMI MKNKY,

Hccrctari/ S. I,
Bmithsomax Ixstitdtion',

Washi.noto.n, January, 18(34.

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Pim.ADn.PiiiA:

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PREFACK.

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I*'

I\ tlic present work I have atteinptod to g-ive .a Monnp-ajili df
tlio North Aiiicrican hoUchojMxliiln. 'I'he <i(")j^rapliiciil area ciii-
Viraced in it, as well as in my former Moiioji'raphs on North Ameri-
can Diptera, is the same whieii has been a<h>pte(l in IJarou Osti'n-
Sai'ken's Cataloiiue, coniprisiiitf Mexie(» and ('ul)a. I readily
uekno\vl('di>-c tiiat hy adopting sneh a wide area for tlie North
Aniericai! fauna, we introduce many species whicli, jtroperly
speakinir, helong to a more soutlieru fauna. IJut I was in(hi<'cd
to a(h>|)t this course as much hy tlie circumstance that 1 possessed
nniny interestiuii' sj»ecies from ^lexico and Cuha, as hy tlie advan-
tage of conforming to the }.ianof the Ciitalogue of Osten-Nackcn.
and tlius alfording a general view of tlie fauna of a larger extent
of country. As the order of Diptera is remarkahle for the wide;
geographical rnnge of the species, and as, for this reason, the
limitation of local faunas is more indefinite here than in most
other orders, the adoption of this somewhat arbitrary limitation
of the Xortli American entomological area cannot i)resent any-
thing ol)jeetionaI)le.

For the greatest part of the materials on which my work i.s
based, I am indebted to the liberal and disinterested assistance (tf
my esteemed friend IJaron Osten-Sacken. Some very interesting
species were communicated to me by ]Mr. Le liaron, of Jilinois.
Tlie greater number of the species from Sitka was collected by
^Ir. Sahlberg, and communicated \o me for description by Pro-
fessor Maeklin in Ilelsingfors ; some sjx'eics o*' the same region
are in the Museum of IJerlin, and were obtained, if 1 am not
mistaken, also from Mr. SahHx'rg. The study of the types of
Wiedemann's Collection, very liberally lent to me for examination

IH

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t)V the Directors of tlio Un/'mihinilii-n Knhinvl in Vienna, nlTorded
nie iiirorniation of tiie ninst vaiutiliie eliaraeter.

Aitliou^ii tiie materials tints pnt at my disposal can he called
(ihuiidtint, tliey did not liy I'ar reach the extent which 1 conld
desire for the preparation of stich ii monojiraph. 1 hojte, how-
over, that new supplies will enaltio me soon to attempt a reneweil
and more thoroiijih work on the same snl)Jecl. I luive to thank
most cordially all those who have contril)uted by their colkM-tions
towards the completion of this monooraph, and at the same timu
1 eai'in'stlv renuest all North American collectors who take nnv
interest in the order of J)iptera to favor me l»y sindlar commnnica-
tions, They can reach me either thronuh the medium of the
Smithsonian Institution or thronuh llaron Osten-Sacken.

With regard to the systematic distriltntion, 1 have conrinned to
J)nild upon the fotiiidation lirsl laid l»y Mr. JIaliday in his admira-
l)le pa]ier on JkiUcltDjitnliilir, contained in AValker's J)iptn-(i
Jlri/aniiicd, and later developed by mo in the seventh part of my
*' AV»c /»('//n/(v/('." To the jrenera, adopted and defined in those
papers, I have added afterwards the genera I'/arjidncurus and
Lili'oncnras, based upon North American species. (Conf Wieii.
Kntoni. Monatsschr. isf)", ]). 37.) In the eijj,htli fascicle of my
" Ne'.ie. Jl(;ilra<'(/r,''' which was a i)rodroine to the present work, I
have further added tlie ixvuvra Pclasloin'itrus and l)ii»itr(i<'us ; the
lirst embraces some species which formed i)revious]y a sharply
limited and well characterized jjroup within the genus Gi/nuxtp-
(cm lis; the latter was established for a species which, by its
general habitus, reminds equally of 'niinojihilta^ and JjihroKi/lii.^,
but is distinguished from both Ijy the iiresencc of distinct hairs
on the upper side of the first joint of the antenme. In the
present publication I have added the new genus Paraclius,
which combines the neuration of the wings of Prlo.stuni'iti'us
with some characters of Gi/mtioptt'nnis and at the same time is
too distinct from the species of the latter genus, to remain united
with it.

Thus the number of genera, the usefulness or necessity of which
I at present recognize, amounts to forty-three. After a general
introduction, I give a table for their determination, and then cha-
racterize them in detail at the i)roper place. It will hardly bo
necessary for me here to attempt to correct the misapprehension

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I'UKKACK.

that the clianK'tors used fur the coiislniclion dt" tho inhlc arc iit tlif
siiiuc lime tluMiKisl iiiiportaiil ;r''ii<'ri(' fliaractcrs ; far from siu-li
liciiif^ tlio cast", I liavo, l>iit mily in a few rare iiistahccs, tried to
facilitate the diserimiiiatinii of jicnera liy prefei'fiii^ to use charae-
tei's applicable only to North American species (for iii^taiiee
in the separation of (I'l/iiiiKiplri-inis from the ;>'enera immediately
followinir it).

The merit of the adopteil distril)iitioii in [i'diera has lieen tested
and proved l»y the circumstance, that all the lu'wly discovered
species very easily found tlieir proper place in it. Of course, all
the {yeiiera cannot i)e considered as ecpially well estahlished.
.Vbove all others, the distriUutiou of the smaller species, for the
most part ne;rlecte(l by collectors, as well as dillicidt to e.vamine,
still oilers many oiiscure points. This is especially meant for the
proper separation of the <renera ChnjHutux and Did/i/iiirKs. To
escape the (lifiiculty of deiiniiij? the proper position of some Nortli
.Vnierican species, sliowinji' the characters of both frenera, I hav(!
l)een obliti'cd to draw the line between the two in a somewhat
diiVereiit manner. The relation of the ^cniis Ifo'coK/oums to
(fi/))n}o/i/cri)iis is likewise not very clear. .\ continued study oi
the structure of the known species and the discovery of new ones,
will •.^•radiially remove this uncertainty and devchtp the .systematic
arranjj^enient, so as to keep pace with such an increase of kiiow-
ledji'c. I thi)d\, however, that I can ji-ive in <>-eneral the ]iositive
assurance, that the location of the species described by me is a
natural and not a forcecl one ; the only exception is Sijuniilirua
Imrhotiis. in which the thund)-like projection of the second anten-
ual joint upon the inside of the third is imich smaller than in the
other species of this frenus. I possess this s]iecies oidy in a sinjrle.
not well preserved specimen. As it can hardly l)e looked for in
any other fjenus but this. I have deeuwd it more expedient to
locate it provisionally here, than to f(Mind \ipon it a new, perhaps
not jnstiliable fjentis.

I have taken pains to elucidate conscientiously the rather con-
siderable innnber of species ]»ublished by former authors. Un-
fortunately, most of these s'pecies were described withotit any
re}>:ard to the most essential iicniM-ic and specilic clniracter.s, so
that only in a very few cases have I been al)Ie to identify them. I
have preferred not to use specific names the identification of which

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WHS not (|nitc' cortnin, as this wtmld only liavo iiici'cnscd llin cnn-
Tiision. ir the identity of one or tlii' other of the species iiul)lislie(l
l»y me, willi a previously deseril)ed one, should he satisfactorily
|>roved, I will always be ready to grant to the older luiine the
priority over mine.

11. LOKW.

Musrmr/. Jiilv I. 18ti:i.

Rkmai!K>.— I liavi' ;i I'imv words to add n^sjiL't-ting the transhitiou of tlii.->
work, wliicli was done under my rare. The terniiiiolii^'v used ha:^
througlioiit been tliat adopted iu tlio first volume of these • Monoi,'raplis.''
The term onttniinl liristli- ahme has been replaced by tiie shorter one, nrisln,
used by Kiiplisli writers. It will perhaps not be amiss also to explain
the sense of tlm terms furc and /<//«/ and their dilt'erence from niiterior
and poMerlor when npplie<l to the feet or parts of the feet.

]iy foil- /<■! i Ccox;e, femora, tibi.-e and tarsi), corresponding to the (lerman
vordvrMv Belni anil the Latin jnJis until i, is meant the y/c>/ /lair of'/i'<f
(or coxte, etc.).

Hy (intiri:tr /'(ct (eorrespondinp to vordircii lieirir, jirdat iintrrinris), the
lira Jirst /•((//•v are to be understood. In this case, however, in order to
avoid all possible misunderstanding, Mr. Loew has almost always used tie-
expression " l/ic fmir iinh rior /'i > I." which was retained in the translation.

Tht' same rule apjilies to lilml (liinln-.^li', jwnliri) as indicating the last
pair, and y/i//. r'nr {/iiiii<i' . jinsti i i'l|■^s) meaning the two Inst pairs.

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14f»

tifii. XI. IIai.tkrk imvj

11!' I (it'll. XXV. NiMAH'i'iiocTrs

TAIU.K OF (((NTKNTS.

IX

Oen. XXV'I. liKiVdhTot-.v
1. cinguliitii /.M', ^

Oeii. X
1.

U,.n. X

1.
•>

S.
4.

r..
(J.

XV'II. Kl'TARslrt .
cijUOH, 1IU7. Hp. %

Will. PlAl'lIOUl'H

iiiuii'UiH Alc. "J, . 9
siuM'tiiliilis y.ii'. ^
sodalis /.«'. ^ . y

l.'lllK-llntllS, iiov. Hp. '^
ll-lll'llstolMUS /,«•. ^Jj . 9

iutt'iruptua Aif. '^

I'ViiK

ir.l (l,.u. XXXV. LiA.N(Ai.r« .
l.VJ 1. ^('iiuiiiin I.w. ^ .9

Oen. XXIX. I.rito.NKnd'H
1. laTulertcens />«•. ^

Oen. XXX. CiiRYsoTrs .

1. cormitus, iiov. sp. %

'2. l()iiL:iiii:tnus /.»■. ^

3. valiilus /.»/•. 9

4. olili<|uurt /.«'. % . 9
f). atliiiirt Aw. ^ . 9 •
G. vividu.s, IIOV. si>.

7. <'<>stalirt /-«•. ■J, . 9

8. sulifOHtatiis, nov. sp. %

0. discolor /ai\ % . 9
10. a 11 rat ud J.w. 9 •
11 i>allipfS Lw. '^ . 9
12. picticornis, nov. sp.

Oen. XXXI. Tkd( hopiiori?,'*

Gen. XXXII. Sympvcsih

1. tertianius, luv. sp. ^ . 9

2. frontalis J.u: % . 9

3. lint'atus Lw. 'J, . 9

4. nodatus Lw, ^ . 9

Gen. XXXIII. Campsicsemds

1. liirtipes Lw. % . 9

2. claudicans, n. s. % •'}

Gen. XXXIV. Plaoionei-uus
1. univittatus Lw. 9

(Jen. XXXVI. H. i:i,u« .

1. .'xiistiis Walk: 1. 9

2. Hpininiaiiiis /f>fr. ^.9
\.\, avidiH, iidv, xp, ^
4. flliler, nov. sp. ^

ir.:i

1.-^4

j

ir.ijj

i(>(i

1(11

lii2

]tj;i flen. XXXVII. llYiiuopiioiirs

lOf) !• iiir.dtatus, MOV. sp 5.9

Idfj I 2. pirata /."'. 9

lilg 3. parvus /.(/•. 'J,

''"'•• (Jen. XXXVIII. Aciiamis
17(1 i

171
174

i7r.
i7r.
170

178
17<
171)
l^l
ls2
IMi
18;}
184

185

18;-.
187
ls8
181)
11»1

103
193
194

190
19G

(ien. XXXIX. MKHETEiirs

1. niyrip<'s /.«•. 9 •

2. vules /.(/'. % «

Oon. Xli. riinvsoTiMCn .

1. jmsio /.ir. 9 •

2. delicatus Lw. 9 .

Gen. XLI. XANTiio<uLonrs
1. helvinus Lw. 9 •

Gen. Xlill. SAiTROPrs .

1. diniiiliatus Lw. ^

2. rubellus Lw. 9 .

3. sui)erbiei>s Lw. X, . 9

4. tenuis, nov. sp. 9

Oen. XLIII. Psilopus .

22'.>

dillusus ll'/V./. 'J, . 9 .

:'.:;.■.

guttula Wi<<l. ^ . 9 .

2:. 7

1.

diuiidiatus /.w. ^

24^:

0

sipho S,iy, ■^ . 9

247

3.

scaber Lw. ■^

-2-)0

4.

patibulatus Say, '^ . 9 •

2.'il

5.

nielatupus Lw. %.2 •

2 '.3

G.

pilosu3 Lw. %

2r)t5

7.

jucundus Lw. %.^

25S

PAilK

llts

)9;»

2i»»
202
204
'-07
201)

211
212
214

2i«;

217

21*
2l!i
2111

221 »
221

223
224

224
22:.
221;

! i\

h

i.J

n

<m

;■ m

TABLE OF CONTENTS.

8. filiatus Lw, % . ,

9. comatus Lw. ' . 9

10. clirytioprasius II'L ^ . 5

11. scobiiiator Aw. 'J, • J .

12. caudatulus Lw, ^

13. calcaralus Liu. %

14. inermia Lw. % » •

Species described by previous
Monograph . . •

Fahricius, Si/stcma Kiitomoloijiic
Musca lopgicornis .

Ihbriciiis, Entomolo'jia nystcma-
ticii . . . •
Musca longiconiis .

Say, Jour. Acini. Xnl. Sc, Phil.

Dolici'opus miit'asciatus .

obscurus .
feiiioratus
Clirysotus iiubilus .

conciiiiiarius .

abdoiuinalis .
Medeterus lateralis .

punctipeiini3 .

Dolicliopus abdoniinali3 .

WiedeiiKinn, AHSsernnrop. Zwei-
JlUifcl. lusccten

Psilopus macula
Sayi .
longiconiis
caudatus .
virgo

fetnoratus .
mundus

Dolicliopus obscurus S^iy .

MacqiKirf, Siiilps (I liuffon, Dip-
tdrcs ....
Psilopua radians .

PAGE

P>OE

2G0

If).

scintillans Lw. % . 9

. 273

2G2

16.

pallens Wied. % . J

275

205

17.

variegatus Lw. 9

278

208

18.

bicolor Liv, 9

280

271

19.

psittacinus Lav. % . 9

281

272

W.

tener Lav. 'J, . 9 •

284

272

21.

filipes LjW. 1 ,

28(5

APPENDIX.

authors, and not contained in this

280
2S9

289
289

289
289
290
290
291
291
291
291
292
292

292
292
293
294
204
205
205
290
290

207
297

MitKpiart, L)!p/f'rex Exotiqiien
Ptiilopus sii)ho .

radians
Chrysotiis viridifemora
Dolicliopus heteroneurus

Wiilher, Lnsecta StiiDKleraiinia
Psilopus lepidus '^ .
Medeterus exustus 9

viridiflos 9
Dolicliopus bifrons 9
consors 9
contingens 9
liebes 9
iiieptus 9
maculipes 9
pulcher '^ . 9
varins 9

Wall-ei; List nf Dipt. Brit. Miis
Psilopus delicatus 9
gemmifer ^
chrysoprasi
suaviuui
aniatus % . 9
inficitus
nigrofemoratus
albicoxa % . 9
Chrysotus incertus
Porphyrops pilosicornis .
Medeterus glaber .

chrysologus 9
alboflorens 9

289

297
297
298
298
209

3(ti'
3(iO
3U(t
301
3(11
3(12
302
302
303
303
304
304

301
304
305
3(i5
300
300
307
307
307
308
308
309
309

no

•'■):

-m-^^.

■

TABLE OF CONTENTS.

xi

PAOE

PAOK

Dolichopu3 afflnis %,^ .

310

Dolicliopus terminatus 9

31 G

cupriuus ]Vied.

311

sequax .

317

lamellipes % . J

311

soccatus .

317

ciliatus % . 9

312

remotus

317

adjacens J ,

312

irrasus . .

318

coerceiif, % .

312

Orthocliile derempta .

318

finitus % .

313

distractus

313

Walker, Trans. Entom. Soc.

319

discesus 9 .

314

Psilopus unguliveua

319

contiguus %

314

solidus .

3ia

exclusus J ,

314

peractus .

311)

confinis 9 •

315

hfereticus .

320

conterrainus ^

315

permodicus

320

separatus 9

31G

SrPPLEMEXT.

I. General remarks on the Dolichopodidae of North America . . 321
II. Description of some Species communicated after the volume had

Gen. II. DoLicHOPua .

43. dorycerus Lw. %

44. spleudidulus Lw. ^

45. palaestricus Lw. % . 9

46. melanoce-us Lw. % . 9
47* quadrilamellatus Lw.

Gen. III. Gymnopternus
19. poliins /,?«. % . 9
24. pusillus Lhy. 9 •
27. chalcochrus Lw, % , 9

» •

OJ^

•

323

26. coxalis Lw. % .

335

•

3?,(J

27. meniscus Lw. % . 9

336

•

327

28. hnmilis Lw. % . 9

336

•

)

328
330

29. exiguus Lw. 9 •

337

Gen. V. Pelastoneurls .

337

•

331

6. lamellatus Lav. 9

338

7. abbreviatus Iao. •£ .

2

338

•

332

8. alteruans Lw. 9 •

339

•

334

•

334

Gen. VI. PoRPHYROPS ,

340

335

5. longipes Lw. '^ .

340

'. J '•

h

'■ '.,■'■ ■ ■-. I'Ji

" V. . ■'1 I , * i ■!'

■M-,

Explanation of the Plates . , • 341

Remarks on the Generic Characters explanatory to the Plates . 345
Index 357

y:.-'

.■■■-*"<

w

p

'r-

'i^.:

■^;

i

DIPTERA

07

NORTH AMERICA.

PART Zl.

VI.

ON THE NORTH AMERICAN DOLICHOPODIDAE.

IXTROPUCTIOX.

The DoUchopndidn: arc iiiiKniu- tlioso families of diptora which
show l)ut so few points of rchitioiiship to others tliat it is iiiipos-
silde to name any family of a particuiai- allinity to tliem. A
superficial f^huice, it is true, seems to point out the Ephiidrinidtr.
and the genera of the Tnc/n/drimtidtr in the vicinity jf (Hiitocvra
as the nearest to iha JJahr/ioiiodiiln ■ hut a clo>;cr examination
will show that, instead of a true relaiionship, there arc merely
some points of external analogy between them, jxiints common
to most insects (and not only diptera) jircfcrring to live in tho
vicinity of water. 'I he want of a true rclatiopship licconics
immediately apparent when any portion of their inner or outer
organization is submitted to a comparative scrutiny. The ncura-
tion of the wings of tho Ihdichniiodidtr alone is so peculiar that
it is sufficient in itself to distinguish this family not only from
the Ephiidi'iiiidtv and the aliovc-mcntioncd gi'oup of Tachijdrit'
viidie, but als(j from all other families of the order. This neura-
tion, together with the brilliant-green color of the greater part
of the si)ecies, renders the Doli'cliojtodidfv one of the moM easily
recogiuzable families of diptera.

The peculiarities of the neuration, which is shaped in general

:^^

i"S»(.'

' :i'

m^

■m

: -5

iv;.

m

*'j

DIPTERA OP NORTH AMERICA.

[part II.

accordiufr to the type of \]w IJiptera aralif/ilvra (r(»iin»arc Mono-
gTiiplis, etc., I, jjiiu'c x\iv, lij;'. 1), iire the I'ollowiiij:," in this raiiiily:
Tiie costiil vein extends iis lar as tlie tip of the J'onrth h/n^itndinal
vein ; tlie auxiliary vein does not run towards tiie eosta, hut to-
wards the lirst lonjj:itudiiuii vein, stopping* (piite lar from its tip,
and either eoaleseinjj; entirely with it or disappearing without
huvinfi,' joined it. The third longitudinal vein emerges from the
.seetuid not I'ar I'roni its root, and hoth veins forni at this phicf a
more or less knot-shaped swelling ; the small eross-vein (olleu
quite obsolete) is at, or close l)y, this swelling, so that the lirst
basal cell is unusually short ; the diseoidal cell, much narrowed
towards its })ase, is eoalcscent with the auterior of the two small
])asal cells in couseipience of the ahscuce of the vein separating
tlii'm. The oosterior small basal cell (the so-called aiuil ceil) is
snuiU and . ••.(■d at the end. The sixth longitudinal vein does
not generally reach the bonier ol" the wing; sometimes it is en-
tirely wanting, and in this case tlie amil cell becomes indistinct.
The alar ai)pendage (alula) is so narrow that it may be considered
as wanting.

Although all J)olifh<>j)0(li(l,r agree in the aljove-dcseribed pc-
cnliiirities of neuration, still this same nenration alVords very good
and a))undant characters for the distinction of the geiic'ra and the
species; the length and direction of the first longitudinal vein
vary considerably, the position of the posterior transverse vein
also; the most striking characters, how.ever, are t:iken from the
structure of the last portion of the fourth longitudinal vein, which
is sultject to considerable variation, l)eing sometimes paralhd to
the third longitudinal vein, sometimes more or less convergent
with it, sometimes straight, often curved or bent abruptly in the
midtlle, or even broken. In the latter case, the angle formed by
the strong Ih'xure or fracture sometimes bears a rudiment of a
branch-vein, which in some cases (as in most Ftiili)pu,-<) is long
enough to uudve the vein a])))ear forke<l.

For the purpose of distinguishing the Dolichopodidse from the
other families t.f dijitera the characters taken from the neuration
are snllicient, and it is superfluous to have recourse to others
taken from the rest of the body. It is different, however, if we
intend to estalilish the natural character of this family. I will
confine mvself here to characters taken from the external oru-aiu-
zatiou, and as to the internal one, 1 will merely notice ii. passing

INTllOUUCTIOX.

8

tliat, in accordance willi tlic cxtunial slriictnro, it forms a striking
contrast with the or^'aniziilion of all the other dipterous fainilies.

Tiie head of tlie JJulic/iojxMlidtv in /j,'eneral is more or less he-
niisplierleal. Its sides are ocfiipied hy the large, ovate, hairy
oye.': (naked only in Mfdt /irns), which usually reach so far down
that in most fi'enera tlioio are no cheeks {(jcmi) at all, and that
on the under side of the head, between the eyes, there is just sjjaco
onoii.n'h for Ihe large opt-ning of the mouth, which, in some s[)e-
cies, even encroaches miiou a considerable portion of the occii»ital
side of the head. The usually rather hrt^id front l)ears three
ocelli, protected liy strong bristles, and several bristles in both
corners of the vertex; the ri niainder of its surface has no bristles.
The frontal fissure and Innnle* are indistinct. The anteniue are
three-jointed, of very dill'ei'ent structure in dilferent gCMTa, luiy
even often in the sexes of t'>" same species; the second joint i^^
sometimes rudimentary. Tiie arista is two-jointed, seldom alto-
gether bare, generally with a very short pubescence, more seldom
fringed with longer hairs or even plumose; its dorsal or aiucal
position aiVords very constant distinctions between dilferent gene-
ra ; its length and the other characters Ijclonging to it diller
sometimes even in the two sexes of the same species. The face
is usually vertical and smooth ; it has often on its inferior third
an elevated transverse swelling, or at least, on each side, near the
orI)it of the eye, a nodule-like elevation; seldom does the face
reach (h)wn to the iid'erior angle of the eye; it is always without
any bristles, althongli sometimes it is hairy; its lower edge \a
rather sharp, and does not coalesce with the border of the mouth ;
from nude" this i!^])^' project the single-jointed palpi, incumbent
ujton the pr(»boscis (except in ^lji/iri)^i/hi,-<, where they hang down
on its sides) ; they are usually scale-sluipcd, iii<»re seldom lancet-
shaped (for instance, in Or/lmi-lii/r) or round, pallet-shaped (in
DioKlractiK) ] in the females they are usually cousidci'alily larger
thai) in the nmles ; sometimes however (in l)iu.^fr(ict(!<), the oppo-
site is to be I'ound.

The ])roboscis is generally short and (with the exception of
A/i/irosi/lii.'i and Orf/ioc/nlc) stout; its upening is wide, more or
less surrounded by the jn'otuberant suctorial lh)i»s, which, by elap-

* For the explauatiou of these terms, compare MuiKujinjihs^ Vol. I, p. xii»
— O. S.

!', . '"'i

!'.'..

i

r!

Dll'TKUA OF NOIITIT AMF.UICA.

[part II.

^•ing together, slint tlic opciiiiifj ; the species of the genera with
a largo i)rul)()scis, esi)eeiaiiy their feiiiales, can altogetiier engulf
siuiiil inserts within tiieir i)r(»boseis, as if they swalhnved them,
whereas they only suelv them out iMid throw the reimiin(h'r away.
Tlie liorny i»arts of tlie moutli are short. The stout hiliruni luis
on its hiteral edge, whieh is Ix'ut (h)wnwards, several deep incisions,
thus forndng stnuig teeth. The tongue is longer than the labrum,
and lies under it without being encased in it.

The u|>per side of the thora.x is convex, witli bristles inserted in
rows, Itetween which there are more or less numerous short hairs;
in some genera there is a flat, some\\hat concave declivity before
the scntellum. I'rothorax and niesolhorax are very eoalescent ;
no distinct collarc is |)ereeptible, and the humeral callosities are nut
sharply limited ; of the ordinary transverse suture only the begin-
ning is indicated on both sides by a large, '.lore or less triangular
impression. Scntellum with two, four, or six strong bristles ; more-
over, its surface is sometimes hairy. The elongated protlujraeic
stigma is closed. Innnediately above the basis of the fore eoxaj
there is a strong bristle, seldom several. The metathoracic stigma
is unusually small. The epimera of the metathorax have a very
large development; they endtnice often the basis of the al)(h)meu
from the side to a considerable breadth, and extend as a narrow
stripe along the basis of its uj)per side.

The abdomen of tiie female has seven segments, the last two of
which are generally very narrow and contracted under the pre-
ceding ones, so that only five segments ap])ear on the outside ; the
sevenMi segment, in the fenuile, bears on its end two snudl lamellie
connected with it by an articulatit)n and fringed with hairs ; above
them there is, in many species, a fau-shajied row of short, stiff,
thorn-like bristles ; in other species the number of these thorns is
reduced to four or two; sometimes they are altogether wanting ;
the latter is es))ecially the case with those species whieh prefer dry
localities, or also those, the hind part of the thorax of which has
a flat usually concave declivity; this difference in the structure
of the ovipositor has certainly some relation to the difference of
the locality where the eggs are deposited ; it is possible that a
complete fan of thorn-like bristles coi\stitutes a peculiarity of the
si)ecies the larvie of which live under ground, whereas it is wanting
when the eggs are laid in decayed wood.

The abdomen of the male can also be considered as consisting

INTRODUCTIO.V,

of seven sepiieiits, if tlie liyjio]iyii'iuiii lie ('(lusidered iis a sin<;le
se;i'iiieiit ; of tlie sixth se;;'iiieiit only the u|t|iei' liiilf is distinctly
(leveliiped, hilt it is niiieli narrower niid sliurter lliiin llie siirlaeo
of tlie iiMiiiediately iinwediiiji' seji'ineiits. \\'lien this sixth seu'ineiit
Is eoiicealed under the ujtper half (»f the lifth, or when it is strik-
iiiii'ly diil'erent hy its eolDi'ing' fri.'in the iti'eecdiiiji" seti-ineiits and
resenil)les in this respect the seventh, then the male alMldineu
appears only live-jninted. 'JMie seventh scj^nient cimsists of the
proportionally larn'e hi/jinpi/ijium, the structure of which, near its
basis, is not (piite syninietrieal. It consists of a rather stalU-liko
hasal part and of a clnh-shaped jHisterior part ; the stalk-like part
is often very ninch al)breviated, and then not easily jterceptililo ;
the cluh-shaped part is nioval)lo towards it ; the Jiinctioii of hotli
])arts lies always above, on tlie left hand side of the clul)-shaped
portion.

The liyitopy.ti'iiini is more or less inflectecl under the alidomen,
sonieiiines indjedded in an excavation of the venter proportionate
to its size. At the tip of the indected hypopyuMiim, belnv, are
inserted, l)y means of articulations, three pairs of appendages of
The outer jtair of these appeiidau'cs is u'eiie-
the two others, anl must 1

manifold structure

ruliv larger tiiaii

wootliers, aiit must be coiisidereu as orpins

of a ,u'reat irritability, as the roots of the hairs on their inside arc
connected with nerves. 'I'he liasis of this pair is linked to the
hyjxipyu-iiim by a free articulation. The two other jiairs, attaclnd
))y u less free articulation, can be considered as oru-ans for the
])uri)ose of seizinu", clutching'; they lie within the former pair and
are not .seldom of a very complicated structure. Sometimes one
or the other of these j)airs exceeds in leiiji-th the outer pair. Iii-
U'rmost betw<'en them, coincidinj; with the middle line of the
tlutchiii,t!; ajiparatns, a sinu'le aj»i)enda,L;'e is inserted, which also
appears to be linked at its basis. On the upper side of the hvpo-
jtyji'lum, which is the side turned towards the abdomen, there are
two more ai)[)enda,ti'es, usually in the sha|)e of a jrutter; they have
no link at their insertion. Above this <:iitter, (U', more seldom,
within it, is aiiotlier appetida.ti'e, in the shape of a spike, which in
some eases is somewhat button-shaped at the tip; it is pierced
lenjithwise by a channel, and incloses mm-e or less con pletely the
]K'\\\ti, which prcttrudes considerably diirinji- the act ol copulation.
This orsranizatiou is most distinctly de

)pe

Doli-

chojius, whereas it is more dillicult to observe in the genera with

*■■■.'.

.'iff ii.-i

Aft

. ,; (

"." a-
■"•. I.

■ 1 i

'■^A

i!i I

6 DIPTKIIA OF N'OUTII AMEIUrA. [PART IL

n small niul iinlxddctl liyiinpy^iiiiii. In soino frcncra llic one oi
the otlicr of tlic j)iiirf(l orjifiiis tire so snuill as to cscaiJO notict'. A
further and more llioroniili invt'stifi-ation lias as yet to show whe-
tlicf in sonn' ^i'cncra, ami tliis seems, for instanee, to lie the easo
with llijitdjilnjUus, a still larg-er iiunil»er of a|)i)en(la,uTS <loes not
oeeiir, ami whether in ji'cneral tiio orti'anization of all the g-eneni
can he re(liiee([ to the common type, descriheil ahove.

(M" the lirst aiMhnnimil seji'inent often only the upitor half is
]»eice|ttil)le in the nmie and the fennde ; this is cs])e('ially the caso
in those g-em-ra in which the viddlhorncir cjnmera cover a con-
siderahle hrciidth (tf the hasis of the alidnnu'ii; in other fi'enera
the inferior half of the seu'nient is iniwh shortened, and in a \'(.'\y
eases only ccjual in leiiu'th to the upper half. In several jrenera
the lateral nnirij,'in of the sectmd and of the fidlowing segments
shows deep punctures, arrang'ed in a longitudinal row.

The fore coxa', which are somewhat distant from the middle
ones and ])laced miu'li higher than those, arc also longer, and reach
as far as ahnut the middle of the latter. The feet are in geiu'ral
slender, the hind pair generally longer and stouter than the others ;
the femora ai'(^ often rather strong. Besides sliort hairs, the feet
l)ear usiuUly a numher of stiff bristles, especially the tihiic. The
pulvilli are oidy of moderate size; the em|) idium is linear and
always distinct; the claws (idu/ik's) are plain and small.

"We have already e.\|)lained above what is necessary for the
iinderslanding of the very characteristic neuration of the wings.
The snrl'ace of the latter is microscopically hairy upon its Avhole
extent. The teguho are ciliated with bristle-like hairs, and some
snuUler ones besides; they are simide, as the inferior duplication
is wanting or only a])iiarent as a narrow membranous stripe ex-
tending towards the corner of the scutellum.

The sexes of the same si)ecies show, besides the difference in
structure of the genital (<rgans, other important difl'erences in their
organization ; the coloring of the same parts of the body is often
different. Here, as in many other families, it is in the male sex
that these peculiarities assume the character of variously modiiied
ornaments, and it seems impossilde to trace any relation between
them and the sexual functions or the sustenance of the male. The
only exception in this respect is afforded by the considerable dif-
ference in the structure of the parts of the mouth, which is much
more developed in the females, in accordance with their greater

INTUoniTTIO.V.

need of f((o<l, and cuiiscfpu'iitly tlicir mure j)i'i'(l!i('<Miiis liabit^. Tlu;
j)liistic (lillV-roiicfs (list inu'iiisliiiijr tlic male sex rroiii iUv (itlicr iiiuy

10 f'Vi's <>[

tl

10 iiiiilo ar(! ":oiH'riillv snuio

1)0 (U'liiiod as ruUuws : _

wliat lai'^or, ilie faco and sonicliinos also llio front narrower; ilio
contijruity of tlio oyos in tlic iinilo is not fro(|iH'nt ; still it takes
place in some J)iopJiorns al)ovo tlio antonnu', and in some (Hir;/-
t!o/tis ))elo\v tlieni. Tlio third Joint of the antenna; of the male is
lisnallv soniewhal lon"'er, sometimes iiineii l.n'ucr than in the

female; likewise the antennal arista of

.0 male i,-

il'ten nnieli

2)i'olon,n'ed, S(jinetimes extended into a ehd; or hiitton at the tip or
t'uiarjjfod in tlio sha])e of a lanu'l, whereas in tlie fenndo the arista
is mnch shorter and (init(; plain. The feet of the fenmles ai'e, almost
withont exception, plain; those; of the nuilo ol'ten dilVer eonsider-
, ably from them, and hav(,' varions handsome ornaments, principally
on the fore and ndddlo tibia', and the fore and nnddlo tarsi; the
femora as well as the himl tibia' and tarsi very seldom show any-
thing imt a plain structnro. To these diil'erences in the strnctnro
of the feet ninst he added those derived from the hairs and bristles
which they bear; in the fenndo these aro nsnally more sparse,
shorter, and coarser; in the nnde, closer, more delicate, and lonu'er;
sometinu's also they assume in this sex some peculiar modilled
structure. Even tlu' ungues of the nude are sometimes of a pecu-
liar irregidar shape; the pulvilli aro in some cases (as in /h'djihu-
rus) larger in the nnde than in the fenmle. The wings of the nude
often dilfer from those of the fenndo in the outline and the neiira-
tion, those of the latter being in geiu'ral nu)r(! jdain, and repro-
ducing in their neuration the characters common to the genus;
\vliereas the wings of the male show in both rospoots more speeilie
l)eeuliai'itics. These consist u-iially in characteristic sinuses of
the posterior margin and in a stronger sweej) of (lexnre of the
longitudinal veins ; somctinu's the anterior nnirgin also shows a
])ecnliar curve in its outline, or a local thickening, or an elegant
fringe of hairs, all of which do not exist in the fenndo.

The hairiness of the eyes, as well as the hairs and bristles on
the other ])arts of the body, is fretiuently more dense, ften con-

sideral)ly longer in the male than in the fenndo. Tin; very nnnute
and dense lomentum with a silvery refloctictu, -which adorns the
abdomen and the thorax in most species of .Inji/ra, also forms
spots on the thorax of some other genera (as Pelaaloneiwux) and,
in the species of most gonoia, is perceptible at least on the lateral

i'-;l

■.■■,1

'f

IV-'

i- 'IS;*

t ' ' !

!:, -j;

i!Vh i;

< ll
I-

I I

\-i

\ f

•v

r*

8

MI'TKUA OF NOUTII AMKUICA.

[part ir.

liiiirjfiiis of tlie ulMlitiiicn, is likewise freiienilly iiioi'l' exteiuled ami
liiiieli denser in the iiuiles tliaii in tiie feiiiiiles.

The sexual dillrreiiees in the cdloriiij; may he <]esei'ilie(I as Col-
lows: The eyes of (he male are fre»|iieiilly of a dilVereiil eolur than
tluise of the female, ]iai"l icnlurly so, for instance, in the ^^enu^

JH

KIDluU'llS.

The enhiruement of the antennai arista in the nnilu

instance, in an entire ^iTonp of species of /'.'<ilii/>Uft, (hey are

often has a dilVereiit eoiorin;;, nsnally white. The color of (he face
in tilt.' nnde is !:'cneriilly of a pnrer. often a lii'iiihter siiade. In
many specie>, (he hallercs tif l»oth sexes are colored dlll'erently —
for "

M.ick in tin- male nnd yclhtw in the fennde. I^ven the cilia of (ho
tesinhe have in a few instances (as in sonu' species of J>nlir/iu/>((s)
IV dilferent colorinji' in the two sexes. Diifci'cnces in the <Mi|orinj!;
of the I'cet are not rare; they are especially slrikin^if in the ii'cnn.s
I'Kilttjttift, some species of which have altojie(her yellow feet in (ho
fennde, and Mack femora in (he nnde; in others, (he pale coloring
of (Ik' feel is more ex(endcd in the female than in the nude. The
ornaments of the feet, pccniiar to the nndes, also dilTer in their
eolurinji' from the eorrcspondin};' parts of the feet of the other sex,
lu'inji; usiudly Mack, sonn-tinu's whitish, or with a hamlsonie silvery
rellec(i(Mi. Kven wideid displaying' any pcenliarity of s(rnc(nre,
the fee( of (he nnile have sonn'linu's white or silvery spo(s, which
lire wantintr in (he fennde. The winuv are in some cases pic(nred
in (he nude and no( in (he fenmle. 8nch are sonn' species of
J>i)h'ch(>iii(.i, Tfirfii/lrrc/iKs and Si/filcnus, (he males of which have
11 black or white spo( a( the (ip of (he winii' or in i(s jiroxinnty,
whereas tlu! fennde does not show any trace of snch a spot. The
same pcenliarity oecnrs a!s(» in some other iz-enera.

These, often so ('(ms]»icnous dilferences l)e(ween (lie sexes of (he
same species, somedmes render the rccou-nidon of (heir speciiie
iden(i(y somewhat dillicnlt. In order (o proceed in such cases
with some deu,-ree of eertaintv, it is necessary (o i)av a pardcniar

>^ «. ' till

attention to those characters winch are usnally common to both
flexes. The most reliable characters of this kind are: the inurs
m\ the antennte, especially on the first joint ; the shape of tlie
second antennai joint; the |»osition of the arista; the color of the
cilia on the inferior orbi( ; that of the cilia of the tejrnhe, iiotAvitli-
standimj some exceptional cases of its diversity in the two sexes.
In most jrenera, to these charac(ers nniy be added (he colorinj^ of
the feet and of the ludtercs as well as the neuradou of the winjrs.

INTUODUCTION. 9

Tlic firsl twi) (tf tlicsc cliiii'iicti'iN will Ir.inlly ever iiiisIciKJ, if it i.-i
ItDriic ill iiiinil lliut llicv liiivo lu* value in lln' jiciiiis I'.<ili>/>iit<,
(•s)ii'('iiilly ill tli(^ siilxlivisidii with Ithu-k cilia on tin- It^iiilii'. As
l(t till' latter cliaractcr (iicnralinii) it slioiild Itc reinrinliernl iliat,
the periiliaritios strikinji'ly »k'Vi'l(»|»('(l in tlie males as >|»eeilic marks
uru but .--liti'litly indirated in the female, and eaii he perceived only
l»y a very close oliservation.

'I'ho \m\nl^{i\' \\\{; J fnlic/iiipDilid/i are, as far as known, ^•crierally
])rc(hieeous. ^I(»st ttl' them hunt I'or sinallei' diptera or oiher in.-ects
with soft bodies and suck thcin (.mt. They are usually rotiml in
dani|) jihiccs, covered with a rich vcLi'cialion ; many are jiriiicipally
loniid on the leaves of a(|initic |(laiiis, on slmies, jiaiMly overlloun

with water, on dams and near walerla

II-

sonie ol tlieni are able

to run rapidly over the water even when it is rippled by wind
{//i/(lr(i/i/i(>ni.t) ; other; are fond of salt or brackish waters
(Aji/irnsi/h/.-f, Tliiii<)[iliih(!< and some /fi/-h'iiji/inrii.-<) ; the species
of Mfdifrriis prefer dry situations and are found on stumps of
trees, fences, etc., even in verv drv and hot weather.

Litt

0 is as yet known about their ino(Ie of transfoi'inalioii.
?t?ost species live as larva' under theu'roiind; «oine are f Mind in
the earth collected in hollow, rotten stumps; others (as ,S'_//,s/c//»,>)
in wood underu'oiii<i' a process of dry di'cayinu'.

After all that has hceu said above, the natural characters of the
J)nliclii)ii()(liihr may bo })Ut down as follows : (Jeiicrally metall;(;
fi'i'eeii, l)risk and restless diptera of small or nieilinni size, pre(la«
tory on other insects and liviiij;' principally in dami* situations;
the male sex are ]trincipally distiiiuMiished from the females by
dilVereiices in the structure of the feet ; the larvic livinir under
fi'roiind or in decayiuir wood. Head hemispherical, eyes larji'e,
usiiallv Dot coutiu-uous in both sexes, hairv, feiici'd iti, aloiiu,- the

hind border with a row of bristles or hair;

Front, with bristles on

the vertex onlv, and with three ocelli. Anteiiiia! strctche(| out

strai

rht,

wi

th a two-jointed arista. Face, without mystaciiif

bristles; its inferior border not meri:Mn<r into the lateral itorder of
the mouth. Oral openinir occupying- the wlado underside of the
liead, and often also a considerable j)ortion of its hind ]»Iane.
I*i'o1)oscis short and stout, concealed above l»y the sinu'le-joiiitcd,
usually scale-shai)ed palpi, with a wide openini!,' which can be .-hut
by tho protrudinj;- suctorial flaps. Labruni short and stout, with
coarse tooth-like excisions on the sides; lin":ua uuicli more .sleniler

J '. ' 'km

j, ' *

■■;iii|

■ w\

''X

I

10

PIITKRA OP NORTH AMKUtrA.

[PAllT 11.

It-,

I*

V

•I, ■ ,;,

mid soiiK'wliat Iniijrcr. I'ndliorax mid iiicliillionix very coiilcscoiit,
with rows iif bristles ; tin' usual Iraiisvcrsi! suture indicated uuly
nil the sides. AlHlnmeii with ^^rvvn sejiiiieiits, (iiily live (»!" which
are visiMe oii the (tiitside in the leiuale, whereas in the male the
sixth seirnieiit is jfciiefidly pereeptiMe, ami the seventh consists of
the liy|)opy;riuni, usually inflected under the al)domeii and com-
jtosed of two consecutive! part<, licarintr at the end ein'lir ()aired
mid two sin;i'l(' appemlau'es. Willis iiiieroseopically hairy (Ui their
whole suilhce; auxiliary vein not runninu- towards the anterior
mai'u'iii; iintericU' basal cell very short ; discoidal cell coalesceiit
with the second l)asal cell; ]tosterior Iinsal cell very small; alula
rudiiuL'iitury ; tofiulu} distinct, simple, ciliated with long huird.

TAULE FOR THE DETEUMINATIO.V OF THE UENEIIA.

11

TABLK FOR TIIK DKTEUMINATION OF TIIK GI^NKRA.

3

2

IB

3

14

4

10
11
12
13

{First niiti'niml joint Imiry ftbovo.
First fiiitcimnl Joint i,'livliroiis above.
{Ilyjiopyijiuni (listMiL^aijfil.
Hyiii)l>y,i,'iinn nioru or Icsh iniliodiltiil.
{First joint of tho hind tur.ii luistly.
First joint of tho hiiul tarsi not liristly. 5

Faco duscundini; an far as tlie inferior angle of tho oyo.

Ot'ii. I. IIviiuoTEMXTura.
Face not descending as far as tho Inferior angle of tlic vyv.

(>eii. II. I)oi,i( iioiTs.

( Palpi of the nialo unusiiaUy large (Sen. XII. DiosriiAcrs.

( I'alpi of the male sniall (j

[The last portion of the fourth longitmlinal vein is parallel, or almost

J so, to the third longitutlinal vein. (ion. III. («YMN(i:''n;iiNrs.

The last jiortion of the fourth longitudinal vein is distinctly convergent

towards th(i third longitudinal vein. 7

Tlie end of the fourth longitudinal vein is abruptly, or at least steeply

detlected anteriorly. 8

The end of the Jourth longitudinal vein is only gradually dellected

anteriorly. 9

Arista with the usual pubescence ; the end of the fourth longitudinal

vein, beyond the angular flexure, runs in a eurve.

(ion. IV. ?Ai!A<i.ira.
Arista short-plumose ; the end of the fourth longitudinal vein, beyond
the rounded llexure, runs in a straight line.

(Jen. V. Pelasto.vel'kcs.
/ Tho face reaches down to the inferior corner of the eye.
) (len. VI. TAcnYTKK( nrs.

' The face does not reach down to tho inferior corner of tho eye. 10
( Proboscis and palpi very much prolonged. Gen. VII. OKTHornii.E.

( Proboscis and palpi not prolonged.
( Scutellum hairy.
I Siutellura not hairy

{Hypopygium sessile.
Hypopycium pedunculated.
f Second antennal joint of usual shape.
( Second antennal joint rudimentary.

11

Gen. VIII. SvnisTBOMA.

12

Gen. IX. IIkucostomus.

13

Gen. X. Hypojmivi.lus.

Gen. XI. IIaltekkkucs.

i ■

-.1., 1-

!. J;

" ' * i

■'.I-

I . i'-

1:2

DIITKHA or NOUTII AMKlUfA.

[I'AItT jr.

, , ( AbiliiiiU'ii of iii.'ilii l.itci'.illv coiiiiiii'ssi'.l.
* AliiloiiK '1 of the iiialo not I'diiipri'^scd.

If)

(liMl. XIII. AXKI'SIUS.

iproscd. 15

f Si'i:(>nil autcnn.'il joint "( the usual transvorso sliajn'.
I (icii. XIV. Ak(iyi:a.

I t^oi.'onil antt'iinal joint with a tliumli-lilit' iirojcition over llic insiilo of

1^ tllO tllilli. (ilMI. XV. f^YM'OK>U).V,

I Tlilivi anttMina! join 'n both si'xcs or at least in tlio nialo, iiroloni;(!il,
I i)oint<'il, anil \ ith an apii-al arista. 17

lii I riiinl antiMinal joint short even in tlio male, and if it shoulil ho
I somewhat prolon^eil, then neither pointeil nor with an ajtical, hut

(^ at the utmost witii a suhapieal arista. -:!

/ Second antennal joint with a thunih-like jirojeetion over the inner

111 side of the third. (ien. XVI. Sy.naktuui's,

'■ Seeoud antennal joint without a tliumh-likt projeetion, transverse. 2S
f Posterior tiansverse vein distant from the niaitrin of tiie wini;; iialpi

1^ I ineunihent. 11'

I Posterior transvi-rse vein appi'oxiniated to the mari;in of the wimr;
[ palpi hauijiui; down. (ien. XXII. Ai'hkosvi.us.

.,l ( llypopygium i>eiluneulatt('; free.

' lIvpopvt,'iuni sessile, more or less iinhedded.

lypopVi.

., , ( The male ahdomen has live sej-'nieiils,
l The male alulomeii has six sei^ments.

palpi hauijiui; down.

(u n. XVII. iSYHTKNCS.

•20

(1. n. XXI. is.MiMoTiTS.

•21

/ Third antennal joint jirolonu'ed also in the female.
'Jl ■' (Jeu. XVIII. KuAiMiiiMr.

V Third antennal joint of thi' female not prolonged. 22

fThird antennal joint of the male very muih prolon>j<'d (small, lesrf
.,., ! liairy speeies). (ien. XIX. XiiMiAMUturM.

I Third antennal joint of the male moderately proloiiLred (larger, more
l_ hairy speeies). (Ien. X\. I'iiiiiMlYliol'.-i.

,.) ( Fourth lounitudinal vein forkel.

2-\

i l''ourth longitudinal vein simple

(ien. Xldll. rsii.oiTS.
24

r I'pper sidi' of the tluuMx convex hehind. 2;")

24- Upper side of the thoiax hehind with a somewhat concavo depre.s-
^ siou. 40

.,. ( Fifth longitudinal vein alt<K'eth(:rwantint!;. (Ien. XXXVIII, AcuAi.ef.-^,
( Fifth longitudinal vein distinct. 2*!

r Distance of the posterior transverse vein from the margin of the wing
eijual to its own length or longer. 27

Distance of the posterior transverse vein to the margin of the wing

20

;is

I shorter than its own length.

Posterior transverse vein unusually obli<|ue.

(ien. XXXIV. Pi.AcioNKriii'S.

Posterior transverse vein but little obliipie. 2>>

llypopygiuni distinctly heut imder the venter. 2!)

28 "I llypopygi urn uot distinctly heut under the veuter or entirely imhed-

ded. 30

2!)

TAIJLE FOn TIIK DFTKIlMtNATFoN OV TIIK (iFAKUA. 13

'Tlio faco of both si'xos very bnvul, not nairowi'il siiiu-rioily.

(■I'M. XXIIl. TiiiNoiMiu.rs.
The f'ai'o of hoth hc-xcs rather narrow, sonunvhat narroweil suiieriorly.

(it'll. XXIV. l'i:iii)i;:!i.

30

in

Outer apiieudages of the liypopy^iiim loni:, lilil'or

(ieii. XXV. \i;M.\'roi'KotTfM.

;i

Outer appendaires of thi^ hypopVLrimn not iong, nor lilifornt.
Tliiril joint of the male antenna' conspicuously lari^'e.

(ien. XXVI. Li;i'i()STor..\.

fhiril joint of the niahf antenna' small.

o.) ( I'ulvilli cif the male fore tarsi conspicuously enlarged

:U

S3

34

O!)

( I'ulvilli of the male fore tarsi not, or vt'ry slii^litly, enlarged.

f I'ulvilli of th(> male fore tarsi not prolonged. (Ien. XXVII. iM'TAi;si's.

I'ulvilli of the mahj f

ore tarsi proloiigei

1. (it'll. XXVllI. DiAnioiu-;

I

( Arista altogether or almost altogether apical,
( Arista dorsal.

( AViiigs of considerahle size (larger sjx'cies). (Ien. XXIX
' Wings of small si/.e (smaller species). (ieu. XX

Foet of the male with isolated, strong, spine-like liristles

:it)
vKoxKrurs.

X. Ciiuvsori'.-*.

36

f I'oel ot tlie male witli isolateil, strong, spme-liUe iiristies.
}} (iiMi. XXXI. Turciioi'iioKCS.

y Feet of th(^ se\es without isolated, strong, spiiit'-like hristles. 37

„- ( Face not narrowed ahovt^ (ien. XXXII. Svmi'vcxis.

I Face considerahly narrowed ahov(>. (ien. XXXIII. ('Avi'sicxKMrs.

1- All femora slendt^r, ahdominal segments with hristles liefore the hiiKl
38 -J margin. (Jen. XXXV. IjIaxcam-s.

V Fore femora incrassated towards the hasin. '.]'.)

..,. ( Fore tihia' with long thorns. Gen. XXXVI. ScEi.i.i'.ui.

( Fore tihia! with very shoit little thorns. Gen. XXXVI 1, IIvDUoriioiii's.
. . ( Arista apical, or at least suhapical, 41

( Arista distinctly dorsal. 42

/-Third and •ourth longitudinal veins ;,irongly convergent.
41 j (ien. XXXIX. MiMtKTKKi-s.

*. Third and fourth huigitudinal veins ])aiMllcl. (ien. XI,. f^iiuvsoTiMr.'^.
,„ f Male ahdoinen with six distinct segments. (Jon. Xld. X ANiiioiiii.diu'.-*,

( iMalo ahdomeu with ilvo distinct scgmeiita. (jeu. XLIl. Saucuui'L'.s.

,, i-i Mh

.• H:<

^ ^i^^i^

M,-

' ^bhIf

*■ --i^l,

! I SfH.

^ ''•'■'

' ''"! .'

m

. ».:_TV-

; ■*■.<>>-.

*4f

^'' "ti^L

4'

' '^W

. !^| ';

■!^:i^

:.- -■:

''■■!■ '(■ ' ^

. I ?<••

11

u

DIPTERA OF NORTH AMERICA.

[part II.

ill

I :!'

SYSTEMATIC ARRAXGEMEXT OF THE GENERA.

I. First joint of the antenna with hairs ou its upper side.

A. llypopytriuiii dist'iigagt'il.
A. Palpi of tli(3 male small.

1. First joint of tho hind tarsi hristly.

Ueu. I. Ilygi-oceleiitliiiH. Gun. II. llolicliopus*

2. First joint of the hind tarsi not bristly.

(I. Third and fourth longitudinal veins parallel or sub*
parallel.

Gen. III. Cliyiniiopterniis.

h. Third and fourth longitudinal veins convergent.

Gen. IV. Parat-lliis. (Jen. VIII. Syliistroiiia.

Gen. V. l*(>lastoiieui'U$. Gen. IX. llei'costuiuiis.

(!(Mi. VI. Tacliyti-ci'liiis. (Un. X. II5 popliylliis.

(ien. VII. Oi'tliocliile. Gen. XI. Ilultei'iceriis.

1!. Palpi of the male conspicuously large.
Geii. XII. Iliustraciis.

I?. Hypopygium more or less imbedded.
Gen. XIII. AllO|>sills. Gen. XV. Syiltorinoit.

Gen. XIV. Al'gyra.

II. First joint of the antennaj entirely bare on its upper side.

A. Third antennal joint in both sexes, or at least in the male, elon-
gated, tapering in a i)oini, with an apical arista.

A. Posterior transverse vein distant from tlie margin of the wing,

palj)! incumbent.

Gen. XVI. !<iyiiarthi'iis. Gen. XIX. Xipliaiidrniiil.

Gen. XVll. Nystcillis. Gen. XX. l*oi-|»liyi'01»S.

Geu. XVIII. Kliaiillilini. Gen. XXI. Kiuiliotlis.

B. Posti'rior transverse vein approximated to the margin of the

wing; pal}ii hanging down.

Gen. XXII. Aplli'osylus.

■:V*.T'-V

SYSTEMATIC ARRANGEMENT OF THE GENERA.

15

B. Third antennal joint short even in the male, or if somewhat elon-
gated, then neither pointed at tip nor with an apical, but, at
the utmost, with a subapical arista.
A. Fourth longitudinal vein simple.

1. Upper side of the thorax convex posteriorly.
«. Fifth longitud'nal vein distinct.

a. Distance of the posterior tranaverso vein from the
liind margin of the wing e^ual to its own length
or longer.

XXIII. Tliiiiopliilus. Gen. XXIX. T.yroiiriiruH.
, XXIV. PeodCH. Gen. XXX. C liiysotiis.

XXV. A'eiuatoproctiis.Gen. XXXI. Teiielio|»hoi-iis.

XXVI. I^eucostola. Gen. XXXII. t^yiiipyciiUK.

, XXVII. Eiltai'siis. Gen. XXXIII. t'aiiipsiciieiiius.

G<m
Gen
Gen
Gen
Gen
Gen. XXVIII. Diapliortis.

Gen. XXXIV. I'lugioiieurtis.

S. Distance of the posterior transverse vein from the
margin of wing shorter than its own length.

Gen. XXXV. Liaiicalus. Gen. XXXVII. Ilydiophoriis.

Gen. XXXVI. Ncellus.

/). Fifth longitudinal vein altogether wanting.
Gen. XXXVIII. Aclialcus.

2. Upper side of the thorax posteriorly with a Hat, somewhat
concave, declivity.

Gen. XXXIX. 9Iedeteius. Gen. XLI. Xaiitliocliloi'Us.

Gen. XL. Clll'ysotillllis. Gen. XLII. Sauci'opus.

B. Fourth longitudinal vein forked.
Gen. XLIII. Psilopus.

' ' ,- ■'■'1

i . If

1-

:*!'!

m

.'■.'■Mi '"Wft'il

UYGnOCELEUTIIUS.

17

Gen. I. IIY(;R0C ELELTIXITS.

Tho jrcnora Ifi/f/rucelrii/lndi and Jtolifhojxi.'^ nro tlir only ones
which liavo sitinc-likf bristles on the lii'st joint of tlio hind tarsi,
and this ciiaracter helps to distinn'uish them most easily I'voin all
other Dijlir/nijxxliih'e. They have also the tblhtwinj^ charnrters in
conmion : first antennsd Joint beset with hairs aliove ; third Joint
not prolonu'cd ; arista dorsal ; hyiiopyii'iiim eidirely diseiiii'au'ed;
its outer appendau'es jtroporlionally larii'o or m(»dei'ately lartro,
lamellilorm. The diiVereneo between the two fj;enera is to 1)0
Tound in the lenji'th of the face, which, in JL/gmceleuthus, reacrhes
do", n to the inferior corner of the eye, and which is shorter in
l)ulir/iopu.<. In the tyjiical species of IIij(/rocclt'itl/ii(ti the first,
and sometimes also the !'ec<)nd joints of the antennie are consider-
ai)ly lonsi'er than in Dulic/iojiui^. As on one side the Kuntpeaii
ILjijnjc. Diadetna Hal. a[)proacl»es Dolic/ioinin by the structure
of its antenuie, so, on the other side, some species of Jkilicliojuii^,
for instance, I), jilinnipcs Seop., a sjx'cies common to Europe and
North America, are related to ILjgrureleulhuH by the somewluit
jrreater len.^'th of their face.

1 know as yet only four species .)f iri/i/roccleiilJius ; of the three
typical species, one iidiabits northern and middle Kurope; the
second Sil)eria; the third North America. The fourth si)ecies of
the ifcuus is spread over all Kurope.

The name JIi/yrorcleut/iuH (iycoxiuv^o^, livin<>' in the wet) has
been fjiven to the genus on account of the species being found ia
moist localities.

.■.■■:>.

1. II. latipes LoEW. % and 9. — Aeneo-viriflis, aiiteiinis lufis, ciliis
oeiilonnu inferioribus palliilis, tegularum ciliis nigris, tarsis iiiteriueiliis
maris compressis.

Brassy green ; antenna; red ; cilia of the inferior orbit pale ; cilia of tlie
tegulie black ; middle tarsi of the male compressed. Long. corp. 0.2(3.
Long. al. 0.23.

Syn. IIij(jrocdcuthus latipes LoEW, Neue Beitr. VIII, 5.
2

18

DIPTKRA OF NOHTII AMERICA.

[part II.

.■^'i

w

Clrccn, sliiiiinji:. Aiiti'iiiiic rcMldisli-yclIow, with a black suj)c-
rior odf^e and witli the tip of'tlie third juiiit hliiclc; first j(jint nar-
row and elonji'atod. Face white, y<'Ii()wish al)()V<', much hroador
in tlic 9 tiian in the J*. Cilia (if llie inferior orhit pale. Fore
coxa", tip ofthe middle and hind cox se and feet yellow; tarsi black
from the tip ofthe first joint ; the lirst joint of tlie fore tarsi some-
times altotrether diiskv : the root of the second joint of the hind
tarsi, on the contrary, is pale. On the up]ier side of tlie nuddlo
til)i!e a bristle is conspicuons by its frrcater lentrth; tliere are two
bristles i)efore the tip ofthe hind tibiiu. Tejruhu with black cilia.
Wings tinned with l)rownish; fourth longitudinal vein not broken;
hind transverse vein straight and steep. Four last joints of the
middle tarsi comitressed in the J*, beset on the upper side with
incumbent l)lack hairs; the fifth joint much narrower than the pre-
ceding ones. Costa with a .stout swelling near the tip ofthe first
longitudinal vein. Ijamelhe of the hyi)oj»ygium of moderate size,
white, bordered with black at the tip, jagged and fringed with
black bristles.

JIab. Xorth Red Hiver. (Kennicott.)

Gen. 11. DOLICIIOPL'S.

The ])rincipnl characters of the genus DolicJiopus, as it foll(^,ws
already from what has been said al)oiit it in the genus I/i/yro-
celiiutltuH. are: the ])resence of hairs on the np)>er side ofthe first
antennal joint, the shai)e of the third joint, which is hardly ever
very much elongated, the dorsal position of the arista, the en-
tirely disengaged hypo])ygium, the lamelliform shape of its rather
large outer appendages and the presence of spine-like bristles on
the first joint ofthe hind tarsi.

The genus Dolifhopux, established by liatreille already in ITOl),
is the oldest of the family. It comprised at that time all the
J)oIich()pi)'li(hi', so that all the other genera have been gradually
formed l)y the se])aratiou of some groups ami by further subdivision
of the latter. T,i the sense in which this genus was ado])ted liy
Wiedemann ami Meigen, it still included the present genera (!i/m-
nojito-nxK, Pavaclin:^, rdnntoneurus and Tachnlrcchua, besides
some isolated species belonging to other genera, which had l)een
erroneously located in it. (Such was the case, for instance, with
D. adudua Wied., which belongs to Lyroneurus.) The dcliiii-

1 - '

roLiciioi'us.

19

tioii of DoVichopm^, iti its iircsciit limited i-^ctisc, ^vils jrivcii liy nit.'
in iSf)". Still, t'vi'it now, tliis is one di' tlic iiii'.n-cst uciicra dl'iliis
family. Altli()U,u'li ixtsscssiiiu' iihiiiKliiiit jiiid striklnj:' spcciric dif-
fcrt'iin-s, its iiiimcniiis sjiccics show iit the siimc time so much
nuM'ct'mciit ill tlicir •i'l'iici'id oi'u'iiiii/atinn, tlint n suiidiv isioii into
f^imdlcr u-ciicrii is imitossihlc iil iircsmt, and in fntnri' an attcmjit
of that kind will I'ccinirc^ a jrrcat deal of i-antion. One is easily
tempted here 1o establish jrenerie jiTonps founded upon charaelers
<ir a purely speeifn' Aalne. The ^i'enns IthdtjDiicin'a. fornu'd liv
Jxondani. is diu' to a mistake of this kind. 'J'o found a new u-eiuis
on I), zirzdr, wliieli species a]>parently rcfpiires it on aee()unt of
!>ome dilVerenees in the nenration and in the structure of the an-
tenna% seems hardly worth wiiile, as this is as yet the only species
showiau' such dill'erences.

The .u'eotiTaphical distribution of tlie jrenns Jhlirhopx.^ cannot
1)0 inferred from the data found in older authors, as this <j,-eiuis con-
tained at that time very lieteroL''eneous elenn-nts. Ni'ithcr can Mr.
AValker's sujierlicial publications on exotic species be considered
in tills respect as a source of information, as it is impossilile to
tell from his descriptions which of his species beloiiLr to /hilicJiii/nm
in the restricted sense. Those species from the soiitliern liemis-
jihere, and from the southern parts of the northern, which I hail
occasion to oxamino at ditferent times, ]»roved not to belonu'" to
JfoIicJiopus in that sense. FFence we may safely ciiucjude that
the li'cnns DoIicJmpK.^. in the lar^'e majority of its species, belongs
to the cold and temperate zones of the northern hemisphere; it
can, at least, be positively asserted that the nunii)er of sjiecies, in
l']urope as well as in America, goes on dimiiiisliinii- toward the
South.

The name of the geinis (5oxi;^dj, lonpr, and /tovj, fool) lias refe-
rence to the lenu'th of the feet of its siiecies.

Thirty-one North American sjx'cies u[' ])njiihn}i}i.< liave been
described by former authors; some of them, however, do not belonir
to this <i-enns in the restricted sense adopted here. Of these
species three have been described by Say, one l)y Zetterstedt, one
by .Mac(iuart, and twi'iity-six by Walker. 1'Iie descriptions given
by ]\rr. Walker are, for the most part, very bad, and \\\v wor-t
are those i)ublished in the l)i[itrra Saunder/^idD'i, as they con-
tain only such characters as are common to all the species, or at
least to entire groups, without paying the least attention to tlioso

'" ii

v'Ka

W'

iC '

Wi^

'■'■«■:

*■ .i

(■1

. ^ \'y..A

:"-Jk1

■'•I'i-lll;

■

,', ' ■' ■ '■ '

1 ,.'

1 ...'■;,

20

DIPTERA OF NORTir AMERICA.

[I'ART II.

I IP"'

I

■m

■111!
M

'I'm

marks wliicli serve to distiiifyuish cue speeies from another. Tlio
cij^hteeii descriptions contained in tlie />/.s/ of Di'iilcni of t/u;
Jh'iliHh Mufit'uni mention at least occasionally sncli spi'cilic cha-
racters, and nniy tiu'relore contain some (hita for identifMation ;
but their great defect is tliat Mr. Wailcer has not given u coniph'to
descrii)tion of those peculiar marks whicli distinguish the males of
many species, so that, from his silence alumt these marks, one can-
not with safety conclude that they are really wanting. This accu-
racy is ahsolntely necessary in order to nud\e a description avail-
able. Among tli(! forty-one North American hDlichupodidn now
known to me, I recognize with certainty only a i<iutil(' ft/ifcics
already desc'ibed before (besides the three species which Morth
America has in common with Knrojie, J), jilinin'in's Scop., J>.
brcrijicnuiii Meig., and />. (/<Vc//tv Staiin.); it is the />. vtijin'niDi
W'h'd. (= capn'tis Say). This striking result induces me to
give a separate account of all the other sj>ecies [»ublished by former
authors, in the order of their publication.

1. obscuriis .S«_//. This species, also described by Wiedemann, evi-

dently belongs to tlio genus (ii/iniiojiteniiis and will be diseu.ssed
there. Wiedeuiann'r: colh-ction alFords no liglit upon this species.
It contains, it is true, two specimens of a /Julif/injiiis marked olisriirH.<,
but this is no other than a species of Tuchijtrtchiis, from the Cape,
described by Wiedemann himself under the name of vlixcwmiti. It
is prol)ablo that Wiedemann named this species, as he was in tho
habit of doing, as soon as ho received it in his collection, and that
when he described it afterwards, he dianged its name to oliscinnis,
on account of the already existing vhscunis Say, neglecting, at the
same time, to change the etiipiette in his collection.

2. abdominalis Sa;/. The abdomen is said to be reddish. If Say

means a reddisli, non-metallic color, iheu it is a distinct species,
entirely unknown to me, which will lie easily recognizable even if it
is no true Dulic/iu/iiis, as may very probably l)e tlie case. If, how-
ever, he means a metallic, copi)ery-red coloring, then the descrip-
tion is too unmeaning to jjronounce even about its belonging to
DoHchojt\is in the restricted sense ; as to the identification of tho
species, it is altogether out of question.

3. groenlandicus Zett. A true DdlicliD/iKs with black as the prevailing

color of its feet. It is not among tlie number of the species known
'o me.

4. heteroneurus Murq. is either a Piltistonennm or a Paraclins.

5. bifrons Wal/c. Di)>t. Saund. It may be inferred, from the peculiar

coloring of the face of this species, that it is a I'elastonenrus,

^ym

roi.iciioi'rs.

21

Rltlioutrli no mention is made of tlm ptH'uli.ar rourso ot tho fourth
loii.'.'itiicliiial vein, wliicli cliaradttMi/t's tliis pcnus.
6-0. consore, contingens, hebes, ineptus, all lour (Inscribed hy
Wiilkir in till' liijit. ^^aullll. tVoiii t'l'inale spccjiHcns. Tlie tlt'serip-
tions aie so nrctcliril tliat tlie iilciitili ation is iiii))ossilili'.

10. maculipes W'nlk. I)ii>t. Saund. Tlie si)ots on tlie tiliia', niciitioned

liy W'alknr, seem to iiulicate tliaf this is a I'l /h.i/dih iivii!i. But tlio
Iteeiiiiar course of the fourth loiiL'ituilinal vein, the chief character
of the 1,'onus, is again not mentioned.

11. piilchcr \\'ii//r. Dijit. Saund. I take this to lie a true Jiolicliupiin^

allli'iiiiih the datum of the fouith longitudinal vein lieyond its
flexure not converging, hut lieiiii,' ]iarallel to tlie third, seems tw in-
dicate a (I'l/iitiiiijiii runs. It lit'lonu's to tlic species with hlack femora,
but nniontj the species of this description wliit h I possess from
>.'orth America, there is none to whi(di .Mr. Walker's description of
thH fourth longituilinal vein is apiili(al>li'.

12. variiis II'k//,-. Dipt. Saund. A very distinct species on account of

its sjiotted wings and which will he easily recognizahle even if, as
it seems jirohalile, it does not hidong to the genus I hilirhdjins.

13. aflinis W(tlk. This and the following sjieci' • have heen (leserihed hy

Mr. Walker in the IJ<t of Jh'/ilcni, itc. All helong very jirohahly
to the genus .OiJii/injiic:, :\\mI to tlie STihdirision with yellow feet,
except the cases which I have expressly meiitioueil helow. It is
not said whetlier tlie teguL'c of IK (ijliiu's arc? ciliated with hlack or
pale hairs. If the latter is the case, and if, as it ajipe.'irs from Mr.
Walker's data, the hind tarsi are altogether hlack, my />. s/ih ndidi/.i
might alone be taken in consideration ; but it is hardly iiossilile that
it should be this species, as Mr. Walker's description of the color-
ing does not apply to it, and as tin; hind femora of the 'J, of J).
ojfinin Walk, are ciliated with only a few hairs, whereas in I).
splcnilidiis these liairs are very numerous. If />. aflinis has black
cilia on the teguhe, then /.*. ilisrifr and Inlmtiis could he thought
of, but tlie hind femora of their males are entirely destitute of
bristles, so that the description of Jk affinis cannot be applied to
either of them.

14. lamellipes W(tlk. It has the inferior orbit ciliated with black.

Among the North American species of Jhiliiluijins with pahscolorcid
feet D. jiiirliyciK mils and D. Iircripi nnis alone partake of this cha-
racter. The other data of Mr. Walker (h) not aj>ply at all to these
species, as neither of them has a white face, the first antennal joint
red and the third joint very long.

15. ciliatus Wall.. Very poorly characterized. I suppose that the cilia

of the inferior orbit are pale. If the tegulie are likewise ciliated
with pale hairs, then IJ. niiidliiUs and />. liit< ijicnuis might be taken
in consideration. Ibit I}, raridhi/is has no golden-yellow face, its
fore tarsi are not "dark tawny," but always black from the tip of

Hi

t ■ !■ ■

oo

ni'TEUA OP NORTH AMEIlirA.

[I'AHT 11.

I

tho first joint; Iwsitlos, its iiinlo lia.s ciliati'd liin.l foiiora, which
Mr. ^\^'Uk»■r ilops not as(3rilu) to his sjit'cics. />. In/i i/iciinls hait a
wliito fat o ;ui(l tho hist joint of its I'orc tarsi Ma(.'l\ ; its wiiiu's aro
yt'Uowisli iuiil not i,'ray, tho veins art- luti'oiis ami not Macl< ; liiiaily
tho liiml IV'niora of its maio aro also ciliatfil. If tlic ti'triila' of />.
viliiiht!< an.' L'iliati'il witli hl.ack, tln'ii ««? niiulit jicrhajiS iilnitilV it
■witli /). rilldliis; hut tin' .-iizt' of tlio hitter is too laii^c to ailiiiit
«if tiiis i(h'ntilicntion, anil its faic, insti^'iil of hciim ^rolih-n-vi'llow, is
whitisli; its fori" tarsi aro not dark tawny hut always hlaik fioiu
the tip of till' third joint.

Ifi. adjacens Wall:. Very poorly descrihed from a fcniah' spiciincn, so
tliat it would ho cntiri'ly useless to nttoni]>t its iilt'iitilluation.

17. coercens Walh. Mr. Walker ^vs that the coxa' are hlackisli-LTfcn
towards tho hasis. 'J'his uhaiaeter, conihined with tin- others which
aio ^ivun, excludtis at once all the species with the teLriilie frin!.'e(l
with hlack, which are known to \m , If the te.L'uhe are fiint:ed with
yellow, this species niicht he taken for JK liiiH/iinnitiis ; hut tho last
joint of tho foro tarsi of the latter is only moderately enlarged,
assuming tho shape of a very small lamella, and its hi ml tarsi aro
colored hhiek in a rather striking manner from tho very root of tho
first joint; whereas Mr. Walker says that in liis species they aro
pitch hrown towards the end. Under such cirenmstanees the des-
cription of IJ. Ci.ircdis Walk, cannot possihly he referred to D.
loiuiiiiKinna.

IS. finitus W'lilh. If the tegnhe ai'o fringed with pale, then, among the
species known to me, D, loiii/iimuius, D. sjilciuliilii.i and L>. Iiniilli/'cr
■ have to ho taken in consideration. The face of D. loiniininiius is
not whitish, hut pale ochie-yellowish in the % and yellowish gray
in the 9 the cilia of the inferior orhit aie not white, hut yellowish,
and the hind tai'si are not }iale at the hasis, as in D.jiiiitnn, hut en-
tirely hlack. D. .iiilciulidiis is distinguished from IK jiiiitus hy its
hind tarsi, which are not pale at tlie hase, and hy the ciliated hind
femora of tho male. The face t)f D. hittillifcr is not white ; the hind
femora of tho male are ciliated and tlie hind tihi.'c incrassated in a
very striking manner; therefore this sj)ecies is also distinct from
D. finitus. If the cilia of the teguhu of D. jinitus are hlack, then we
might compare />. thsrifrr and lolidtiits witli it. The hind taisi of
D. (liacifir are not pale at the hase, and the first joint of the an-
tenna) is tinged with hlack only on its upper edge, so that it is
hardly prohahle that Mr. Walker should have overlooked its
striking red coloring. This also excludes this species from tho
identification with 1). Jlnitut^. The hind tarsi of IJ. IoIkiIhs likewise
aro not pale at the hase, and the first joint of the anteinne is red,
and only somewhat dusky on its iipi)er edge, so that it has also to
te considered as difl'erent from D.jiuilus,

:'l'i'!i\

roLinioprs.

'>3

19.

20.

21.

22.

23.

24.

distractiiB Wnik: Walker s;iy-i notliiiij; almnt tlio «ox of tin) ilo-
HcribtMl Hi>t'cliiii'n ; it si'ciiis to liavti hccii a t'cinalc Tim (lc>iiij).
tion ilduH nut nlloi'il any data lt>r own an aiiin'oxiiuiitivu iilriitilica-
tion.

discessua 11 '(///.-. Mr. Walker gives a very unsatisfactory il«'serii>-
tion uf a female. It is u rather surpri^in^ datinu that the ii|>iier
si<li! i)f the tliciax has two longitnilinal coiiiiery-reil stripes, whereas
all the species known to iin', ami marked with .--tiiiies of this eolor,
liave always three, that is, a naiiow intermeiliate one, and two
ljroa<l lateral ones. This character might peiliaps seive as a clu(!
for identilication.

coutiguus W'dl/c, Nolliing is said ;il)(int the color of the cilia of the
inl'eiior orbit. If tliey are lil;uk, then it is certain that I). <iiiiliiiiiun
is not among the sjiecies from North Ameiica known to me. If
they are pale, it still remains to lie known of what color are tho
cilia of the tegula- ahout which Mr. Walker is also silent. Sup-
posing that they are jialtf, then J). Kjiliinlidn.'i woiil<l hav(> to hn
taken in consideration ; hut its male has fringed Iiinil femura and
cannot tliereforo he identilied with /K ciiiiti'iiius. U the cilia of the
tegul;e are black then we would have to comjiare JK (lisii/'> r iiiul
lubiitiis. Hut the last joint of the fore tarsi of IK ili.~rij'< r is not at
all nmcli enlarged, and forms only a small pallet ; tlierefore it can-
not be taken for D. coiiti(/i!iis. I), lolititus has a very much enlarged
last joint of the niale fore tarsi, but as the first joint of the antennx'
is red and only slightly dusky on the upjier edge, and as the
lamellre of the hypopygium have a broad black margin, whereas
AValker describes the lamelhe of />. rinit'Kjitun simply as whiti.-h, as
the wings of 1). /ulmhis, in the male sex, are distingui.-heil by their
peculiar sliape, which is not mentioned in the descrijition of /'. foii-
ti(jiiiis, on account of all this we cannot consider these species as
being identical.

exclusus 11 '((//.-. Very poorly described from a female, so that all
ell'ort to identify the sjiecies must remain fruitless.

COnfinis Wail:. The s^ame may be said of this sjiecieiJ.

COUtermiiius 11''//.'. Mr. Walker does not mention the color of the
cilia on the tegnliv, and this renders the identilication impossible.
If they are black, then the species is not among those known to me.
/>. iHscijir and /'. IhIkiIus are here again the species with which Mr.
Walker's descrijttion agrees in most jiarticulars, but both aie ea.-ily
distinguished by the absence of fring(f on tlu' bind femora of the
male. If, on the contrary, the cilia of tb(i tegiita* of I>. cdiit. rmiims
are pale, then 1). sph lu/idus might iinssibJy be identified witli it,
although it must be admitted that the eoloriiiLr of this sjieeies as
well as some other characters, somewhat disagree with Mr. Walker's
description.

,1'^

u

\:'h I

! I

^'>v'.<- .'

li; i

24

DIPTKIIA OF N»»UTII A^FKHICA.

[I'MIT ir.

ilMl

nir

2f). separatuB H'x'/. Hail (If.sriiiitiuii of a ffinalo, romlurin^ iilciitilluu-
tidii iiii|>iissil>li>,

Uii. terminatus W'nlL-. Also n ffinalo ilfsciilicd. The only HjoTicH to
whicli it may jiosHJlily lio ri'lVircil is />. rliri/snsliiiiiiis, ami I would
liavu no itotilit alxiiit it it' I knew that the rilia of tho tt'^iilii^ of /),
t' niiiiiiihis art' black. Hut Mr. Walkci'.s (icsciiiitiou is silftit ahout
this; lU'itluT <lo<'H it lut'Utiou tho very HtrikiuLj lilack incisures
which till) aliilonu'U of /'. ihri/siislniiiiis shows; Ihwilly, tho tliiiil
joint of till' aiitcunic of tlio latter sjiccics is {lointcil at tlio tip. Con-
hiiltMini,' all this, it woiihl ho |ii'cniatiii'o to assunio the iilenlity of
those species. Thoso who, in the dotonnination of tlio species, rely
upon possiltilities ami vague reas(iniiiL;s, would iierhaps do so. And
douhtless it is th;it the adi'jition of this synonymy would be nioro
reliable than tliat of any other of \\'alkei''s .spucierf with one of thoso
described by nio.

27. sequax Walk: Mr. Walkor says tli.'tt this sjiecies has small tufts of

lilack haiis at the basis of tlio middle tibi;e. He does not mention,
however, whether this pecnliarity is to bo found in tlio male alone,
or in both si^xes. At all events this is a vtjry unusual distinctiou
amont; tho sjiecies of Ihilirhtijiiilw, which will render tho ideiitillca-
tion easy. This species is not among thoso described by me.

28. Boccatus 11'"//-. Tho sex of tho described specimen is not men-

tioneil ; it seems to have been a fi'Uialo. Tho description is too in»
complete to allow rccoi,'iiitii)n.

29. remotuB J!'"//:. Descrijition of a male with plain tarsi. The cha-

racters given allow a comparison merely with l>, iin-isurnlis, tho
male of which, however, has fringed hind femora and cannot there-
fore bo identical with I>. niimiiix.

30. D. irrasxis Walk. This is a small sjiecies, distinguished by its dark

blue color and unusually short abdomen, which is certainly not to
be found among tho spei'ies known to mo. It suoms probable that
it is no true Duhchopus at all.

The slender result of the foregoinpf (liscnssion of Mr. "Walker's
species is, tliiit there are only Uro aiuoiig- them which, witli cer-
tain prohleiiuitical aduiissiuns, may perhaps be identified with
species described liy me, namely, I), conlvrminua Walk, with my
1). splendidus, and D. (crminalus with 1). cJn-ijsodomKS.

To facilitate tho determination of the species I privo, first, a
dichotomic tal)le. I (uiinil it impossible to briiifj it down to tho
single species without making use of characters peculiar to tho

iSi:

lifi,-

."Ill

i>(>i,irrt(»iMM.

SK

iiiaU' sex (.Illy. Tlic systciimtic iuTiiii;rt'Mifiit wliidi rulluu> llic
ilirliutiiiiiir taltl*' suliilisMlt's tin* ^^'iiiis in ^Tulips, rmiiHlol ii|iiiii
easily pcrcjiililili' (•lini'iictcrs imihiiiiihi to luiili x'Xts. I tliiiik it
will lie iiscriil 10 retain tli(".t! n'ruiips, (ir, at least, llie ]iriiiei|ial
aiuoii^ tlieiii.

Tnhlf for ihlfimhiiiiij the Sjii tif!<,
( I'ri'vailinu' color of tin- f'-ft Mai'k. 2

= {

( I'rcvailim: culor of tlin ftti-t yellowish,

(ilia of tlid inferior orl)it black.

Cilia of the inferior orbit whitish.

Face ochre yellowi>h.

l''act' silvery white.

I'irst joint of hind tar>i with nntnerons bristles,
, First ioint of hiiul tarsi with but ftjw bristlus.

1 {j'r^t^^ts /.

2 laticornis A

:i setifer A

j^ ( LanielliB of the hypopygiuni jwiuted.

( Lanielhe of tho hypopyifiuni roundud ovate.
(. ( Cilia of the inferior orl)it black.

I Cilia of the inferior orbit palo,
I'ore coxiu blackish.

ow.

f ( nin<l tibia' lilu'k only at tho tij). 0

( Hind tibiic (luite black. 7

("Tlio black at tho tip of tho hind tibi.o rather oxtendod and not very
j sharjily liniittMl. 4 albiciliatiis Am-.

I The black at the tij) of tho hind tibia' but little extended and sharply
(. limited. •> xaiithocneniuB, n. .-i).

^ ( A considerable extent of the tip of the femora yellow, (i tetricus, n. sp.
I The extreme tip of tho femora only somewhat yellow. 8

LamelliB of the hypopygium jwiutod. 7 acuminatus I.n',

fs ovatuB /■"•.
10
11
!^ pachycnemus f.w.
10 brevipennia Mn'ij.
12
23

,., f Antennie black, at tho utmost, tho first joint almost red. 1)5

t. Antonna» altogether, or at least their larger portion, yellowish red. 121
f Fore coxiB dark beyond tho mid<llo. 11 longimaiius /.ir,

14
16
t Tip of tho hind tibiio not or very slightly infuscated. 16

,,. f Fore tarsi only ferruginous-brownish. 12 brevimanus f.w.

\ Fore tarsi blackened from tho tip of the first joint. liJ socius /.n:
. ( Hind tarsi entirely black. 17

•■ Hasis of the hind tarsi i)ale to <a considerable extent. 19

f Hind femora of tho male not ciliated. 14 nudus, n. sp.

I Hind femora of the male ciliated. 18

,.. ( F'oro coxio blac

' Fore cox;o yell
, . ( Tegulio with jialo cilia.

( Teiiubo with black cilia,

13 ,

t Fore coxae pale.

-J , f Tip of tho hind tibiio decidedly blackish

It
17

pi

I .

'•I

mi

» ' j ■ 'Iff*

f; C.-l

ill

! I

I! ;

til!iJ:ll.i

! •'!;!' 'I 'I

26

IS

lit

2l»
21

O.)

23
24

DIPTEllA OF NORTir AMERICA.

[I'AKT II.

I

18 eudactylus /.lo.

Ill tonsils Lw.

2u tener /."•.

-1 variabilis /.»•.

22 luteipeiiuis /.ic

2-4

28

23 ramifer f.iv.

25

20
27

28

29

30
31
32

33

34
35

30

Hind femora of tho male with spar.su ami rather short cilia.

15 subciliatus, ii. sp.
Hind femora of tho male with very long and dense cilia.

Ill splendidus /-«;.
Only the last joint of the foro tarsi of tho male is enlaigcd.

17 batillifer Lw.
The two last joints of the fore tai'si of the male are cnLuged. 20

Hind femora of the male eiliatt'd.
Hind femora of tho male nut ciliated.
Last joint of the fore tarsi of tlie male enlarged.
Fore tarsi or the male iilain.
Willis hyaline with a yrayisli tinge.
Wings hyalim; with a .-cUowish tinge.
Fourth longitudinal vein broken.
Fourth longitudinal vein not broken.
Antjnnju black.
Antenna; yellowish-red.
Fourth longitudinal vein broken twice at right angles. 24 bifractusAw.
The inferior angle of the fourth longitudinal vein sharp, the superior

one roundeii. 2G

Tarsi of the male plain. 25 vittatus Lir.

Tarsi of the male eiilartretl at the tip. 27

Hind femcra of the male ciliated. 20 cuprinus ]\le(l.

Hind femo'a of the male not ciliate<l. 27 loiigipennis /.iv.

Antenna; red, at the utmost the third joint somewhat or altogether

blackened at the tip. 29

AntenniB black, at the utnuist the first joint partly red. 30

Humeral callosity of the same color with the u'>'>er side of the thorax.

30
Humeral callosity yellowish. 35

Ai'ista much enlarged towards tin; tip in the male. 2S hastatus, n. sp.
Arista of the male not enlarge<l. 31

Last joint of the fori^ tarsi not eidarged in tho male. 32

Last joint of the foi'e taisi enlargi'd in the male. 33

First joint of the male middle taisi feathered. 211 pltimipes Scop.
First joint of tho male middle tarsi not feathered. 3(i fvilvipes Lir.
Last joint of the male fore tiirsi with a lamellifurm iiiipendage.

Ill sexarticulatus, n. sp.
Last joint of the male fore tarsi without lamelliform appendage. 34

Last joint of the male fore tarsi small.

I^ast joint of the male fore tarsi largo.

Fere tarsi of the male j>lain.

I''ore t/usi of the male eidarged at the tij).

Face dark gohlcn-ycliow.

Face not golden-yello\7.

32 ruficoniis Ac.

(411 lobatus /.»'.)

33 scapularis /.«'.

34 funditor Lw.

35 chrysostomus Lw.

37

}'^

DOLICIIOPIS.

27

37

38
3'J

40 \

41
42

Tip of the liiiul fomora iiifuscated above. 38

Tip of tho liiiul femora not iiifuseated above. 39

Fore femora on tlu! under side witlx a blaek stripe. 3G praeustus Lir.
Fore femora witliout blaek streak. i>7 comatus />«•.

Fore tarsi black only at the tip. 40

Fore tarsi black from the tip of the first joint. 41

Two last joints of the male fore tarsi but little enlarged, feathered
with black. 158 scoparius, n. sp.

Two last joints of the male fore tar^i enlarged, not feathered.

31t discifer S/aun.
Last joint of the male fore tarsi very mucdi enlarged. 40 lobatus /./'•.
Fore tarsi of tho male plain. 4'1

Bristles of the hind tibiic longer than usual. 41 setusus Lw,

Bristles of the hind tibi.e uot lon^rer than usual. 42 incisuralis Liv.

>Mi

i>.»

Systematic distrlbittlon of the Species,

I. Prevailing color of the feet black.
A. Cilia of tlie inferior orbit black.

1. gf^tus Lw.

2. laticornis Lw,

B. Cilia of tho inferior orbit whitish.

3. setifer Lio. (!. tetricus, n. sp,

4. albiciliatus Lw. 7. acuminatus Ltc.

5. xanthocnemus, n. sp. 8. ovatus Liv,

II. Prevailing color of the feet yellowish.

A. Cilia of ihe inferior orbit black.

9. pachycnemus f.w. 10. brevipennis Mclij,

B. Cilia of the infeiior orbit pale.

A. Cilia of tho teguhe pale.

1. Antenn.'o black, the first joint at the utmost partly red.
11. longimainiB Lir. 10. splendidus f.w.

17. batillifer A»',

18. eudactylus Lie.
I'd. tonsus Lw.

12. brevimanus Jjw.
iS. socius /.»'.

14. nudus, n. sp.

15. subciliatus, u. sp.

2. Antonnne entiiuly, or their greater portion, yellowish red.

20. tener Lw. 22. luteipennia Lw,

21. variabilis Lw.

:i:- V\ ■"

■ l- ■

II •;

28

DlI'TKllA OP NORTH AMKUICA.

[I'AIIT II.

B. Cilia of tlie tcguhe black.

1. Fourth longitudinal vein broken.

a. Antenna) black.

23. ramifer Lw.

I. Antennae yellowish-red.

24. bifractus A>(t'. 2(j. cuprinuB Lw.

25. vittatuB Ari'. 27. longipenuis Lw.

2. Fourth longitudinal vein not broken.

a. Antenn;e red, at the utmost the third joint at the tip
almost entirely red.

a. Humeral callosity of the same color with the
thorax.

28. hastatus, n. sp. 31. sexarticulatUB, u. sp.

2d. plumipes Scnp. 32. ruficorniB Lii\

30. fulvipes Lie.

B. Humeral callosity yellowish.
33. Bcapularis /-"•. 34. funditor Tao.

h. Antennre black, at the utmost theifirst joint partly red.
35. chrysostomus Lw. 3!). discifer Stmin.
3(5. praeuatus /av. 40. lobatUB Lw.

37. comatus Lw. 41. setosus Lw.

38. acopariuB Lw, 42. incisuralis Lw,

mm

;;if

':y"

DOLICIIOI'US.

PESCIUPTION OF THE SPECIES.

I. PUEVAII.INa COLOR OP TIIE FEKT IJLACK.

A. Cilia of the inferior orbit blarl:

1. D. [;ratlis Loew. % . — Kx viridi ch.ilybinis, pedum nigrorum tiMFs
anterioribiis totis tibianiimnie jiosticiirum diiiiidio basali llavis, facie
ochracea, eilii.s ouulorum inferioribus tcgulaiuuujiio ciliiri nigiiis.

Bluisli-areen, feet black, the four anterior tibia' cntiicly, tlie two liiiid oiiei*
upon the basal half j'ellow; face ochre-brownisli ; cilia of tlie inferior
orbit and of the teguUe black. Long. corp. (1.23 — U.24. Lung. al. 0.21.

Svx. Dolicliopiis ijrutiis Loew, Neue Beitriige, VIII, 11, 1.

IJluish-orcen. Tlie narrow face ocliro-brownisli. AntonnaJ
black; tlie lirst joint rather niirrow. Front metallic liluisli-<rreen.
The cilia of the inferior orhit l>lack. Laniellte of the liypo|iyn'iiini
whitish, of moderate size, on the ni)i)er and the apical nuu\uiii with
a moderately l)road hlack border; the apical nnir.u'in somewhat
jagfred anil frinj>H'd with numerous black l)ristles. FeuKU'a black,
with yellow tip; the hind femora rather stout, ])rovidcd with a
bristle before the tip; upon the under side ciliated with lon,<r black
liair; the four anterior tiltiie and tarsi yellowish, the latter ones
l)ut little darker towards the tip; hind tibiie sonn-what thickened,
the apical half and the whole of their hind .<ide l)hick, the remain-
inj^ parts yellowish; hind tiirsi »piite I)lack, the lirst joint with \'v\v
bristles. Teii'uhe with stroiijr black cilia. Winti-s hyaline, the
eosla is thickened before the tip of the lirst lonii'itudinal vein, and
only very <rradually attenmited beyond; the end of thi' fourth lon-
gitutlinal vein converu'es towards the third.

llah. Trenton Falls, West Point, Fali-sades, etc., X. Y. (O.s-
ten-Sacken.)

7...>- '■■■ :* \IA\i\

^m.

wmm

1-^^
h:^

n

3« D. laticoi'ilis Lokw. ^ . — Viridi.s pedum niarorum tibiirf, oxcepto
posticarum apice, llavia, facie alba, ciliis oculorum inferioribus uigrid,
tegularum ciliis albis.

Green, feet black; tibia-, excepting the tip of the hind ones, yellow; face

'f\-^

r »

so ■ DirXERA OF NORTH AMKHICA. [PAKT II.

white ; cilia of the inferior orbit hliick ; cilia of the teguhe white. Long.
Corp. (1.17. Long. al. (Mri.

Sin.

I'

iliclb

'!'•

I'iti

is Loew, Neiie Heitr. VIII, 12, 2.

net' \v

liitc, ratlu'V broad lor ii iiiii](

Aiiteiniii! black; the

third joint laru-e and hn; id, ovate; arista iiisortfd upon its second
tliird. Front metallic jri'cen. 'J'he cilia of the inferior orl)it
lilacii. lianielke of the hypoityfiMiiin rather small, of u trape/oidal
form, the upper and apical iimrti'in are hut very little bordered
with black; their mar<j,'in is not jaji\u'ed but only frin<>-ed with
minute black hairs. Tij) of the co.\;e yellow. Femora black,
with a faint ji'reenish reflection and yellow ti}). Tibise yellowish,
('riio middle til)iie are wantinjjj in the described specimen.) Tho
tip of the hind tibia', which are not thickened at all, is black.
I'ore tarsi from the tip of the first joint black; hind tarsi entirely
l)lack ; the first joiid is beset with a \V\v tiiorn-like bristles. Ifind
femora before the tij) with a stout bristle. Teji-uhe with whitish
cilia. AVinii's hyaline; the costa ))ut scarcely thickened about tho
tip of the first lonji'itudinal vein ; the end of the fourth lonjritii-
dinal vein conver<i"es towards the third.
JJab. Connecticut. (Xorton.)

m.

.in

k

m.

B. Cilia of the infer ii)!' orbit pale.

3. I>. SCtifc'l' Loiav. % . — Obscure viriilis, pedum nigvonim tihiis an-
terioribus piisticiuinnque diiiiidio basiili llavis, facie alba, ciliis oculoriuu
inferioribus tegularuuique ciliis albidis, nietatarso postico valde setoso.

Dark green; feet black, the four anterior tibia' ,'ind the basal half of tlio
two hind ones yellow; face white; the cilia of the lower orbit and of the
tetrul.'c whitish ; the first joint of tin; hind tarsi with many thorn-like
bristles. Long. corp. 0.17. Long. al. 0.1.'.

Syn. Doliclmiiiis sctifrr Loew, Neue Ueitr. VIII, 12, 3.

Face silvery-white, lutrrow. Antenna' black, third joint sliort.
Front metallic a-reen. The cilia of the iiiferi(jr orbit whitish.
The lamella' of the liyi)opy<iium whitish; their lone: apical umrfin
is finely jau'u'ed only l)elow and frinu'cd with lonu," bristles, above
only finely hairy; its lower corner has a narrow black border.
The l)hick femora show a ji'reen reflection and have a clayish-yel-
lowti]); the hind femora have a bristle Itefore their tip and are
ciliated on their under side with lonji' black hairs ; the four anterior
tibitu are ehiyish-yellow; the first joint of tho four anterior tarsi

,■ '■'A'.

i:

DOLiciroptrs.

31

is of tlio same color; its tip mid tlic rt'iiiainiiiu: joints arc Muck.
Tilt! liiiul tibiiP arc Itlack; upon tiicir nppci- side, IVom the l)aso
beyond the middh", chiyisii-yenow ; towiirds their tip I)iit little
tliickcncd; tlio first jnint of the hind tiirsi is covered with iiiuny
tlionidikc ))ristles. Tco'idn; with whitish ciliii. Winn's entiivly
hyaline, towards the l)asc soinewluit wcdu'c-sliapcd, with a lihudc
8})ot wliicli occupies tlieir very tij). Tho c(Kta is hardly tliickcncd
near the tip of the first l()ii<j;itndinal vein; the end of the Innrth
lonii'itndinal vein convcr;i:es towards the third.

llab. District (Jolnnil)ia; Trenton Falls, X. V. (Ostcn-Sacken.)

: ;•?':

4. I>. albiciliatiiH Lok'

9. — 01)scure viridis, poflnin iiitriornni

tiliiis, posticarum apice taiui'ii exc('))to, tarsorumiiue aiitcrionmi l)asi
fiavis, facie alba, cilii.s ociilonim iiitV'rioribus all)is, tegularuiu ciliiij
nigris.

Dark groen ; feet Mack, tibi.T, oxoepting tho tip of the liiiid ones, and tlie
basis of tlie four anterior tarsi, yellow; face wliite ; cilia of the inferior
orbit white; cilia of tin? tegulie l)lack. hong. corp. (MiO. hong. al. l».20.

Syn. Diilichujius alliiciHalus hoEW, Berl. hnt. Monatschr. VI, 211, f)!).

Dark preen. Face jiroportionally rather broad, white. An-
tcnnii; black, third joint short. Front nietalb" u'reen. Cilia on
the inferior orltit white. Femora black, with a fi'rcenisli reflection,
their extreme tip brownish-yellow; (Mi tli< under side of the hind
femora the hairs are somewhat lonj^-cr than in the related species,
and of such a kind as to lead to the sniiiiositiini that the male has
the hind femora ciliated with black. Tibiie yellow, the tip ol" the
hind ones l)lack; this black colorin.ti' occupies on the anterior side
perhaps the fourth, on the hind side nearly the third ])art. On
the four anterior tarsi the four last joints, includint;' the tip of the
first joint, are black; the hind tarsi iirc entirely lilack ; their first
joint is as long' as the second, upon its upper side with two bi'is-
tlcs, and ui)on its under side with one. Cilia of the teyuUe black.
"Winji's hyaline.

Jlah. Illinois. (Le ]>aron.)

5. D. xailtliocneinus, n. sp. % and 9.— 01)scnre viriiHs, pedum
iiigrornm tibiis, posticarura apice tamen excepto, tars()vnni(|ue anterionnn
hasi tlavis, facie alba, ciliis nculoruni inferiori\)US albis, tegularuiu ciliis
nigris, fenioribus maris posticis aU)0-ciliatis.

Dark green; feet black, tibia-, excepting the tip of the hind ones, and tht)

i .'I

^k: IP^

!:>■ il

,1

• (I
I

I-;

4!''

32

Ml'TEUA <»P NOllTir AAIKRTCA.

[l>AUT II.

Ij.isg of the four anterior tarsi, yi-llow ; face white; cilia of the inferior
oihit white; cilia of Uie tetrulie black; hind femora of the male ciliated
with white. Long. corp. 0.1") — U.IO. Long. al. 0.17 — 0.18.

Ill the color and cvon tlie structure of the body this sjjccios rc-
scnildcs />. (ilhlcilialun ; but it is much smaller. Face white, that
of the male rather narrow, that of the female jtroportionally rather
brnad. Paljii blackish at the base, at the ti}) more yellowish and
with a somewhat whitish reflection. Antenme black; third Joint
railicr short, in the J* somewhat larji'cr than in the 9. Front
metallic {rreen. Cilia of the posterior orbit black alxne, white on
the sif'e and l)elow. Coxic black, trochanters brownish-yellow.
The fore co.xtc dusted on their fore side and beset with black hair.
Femora ))lack, with ))rownish-yell(JW tip, the hind ones before the
ti|) with a l)ristle. The hairs of the femora are ])lack, but there
are on the under side of the four anterior femora of the male some
delicate and short white Iniirs. The under side of their hind
femora is ciliated with very long white hairs; upon the under side
of the anterior femora of the female the hairs are chjser than in the
male, and show a whitish a])])earaiice only in a certain direction,
whilst in another direction they a])i)ear rather blackish. Tibia)
yellowish ; the land tibio) are colored with black at the tip; this
l)lack coloriuff has but a moderate extent and is rather sharply
linnted. Tarsi plain in both sexes; on the four anterior ones
the tip of the first joint and the four f(dlowinji- joints arc co-
lored black; the hind tarsi are entirely black ; in the male their
first joint has more thorn-like bristles than in the female. Cilia
of the tcfi'ula) black, but mixed with nunnte white hairs, as it is
also the case with the related species, for instance with />. alhici'
lintus. "Wings grayish hyaline; in the nude the anterior margin
has at the tip of the first longitudinal vein a small knot-shaped
swelling. The white lamelhe of the hyj)oi)ygium are of a rounded-
ovate form, bordered with black, jagged on the ujiper and apical
margins and friyged with black bristles.

Hab. Sitka. (Sahlberg.)

OJiticrvafion. — Between the diagnosis of this species and that
of I), albiciliatus there is no difference with regard to the female
sex except in the size. Indeed the females of both species are
very 'Much alike. In order to distinguish them it will be well to
bear in mind that the female of D. a-anthocnemus is not only

i:i^.

DoLicnorus.

83

imicli smaller, but that the iiKMsurcs of its ahdonion nro loss
l>lafkeiieil, that the black coloriiifr uii the tii» of its hind tibiiu is
less extended and more sliar])!}' limited, and that liinilly the short
liairs nj)on the under side of its fore and middle femora have, in
a reflected light, for the most l)art a whitish appearance, whilst in
the fenmle oi 1>. ulhicilialiiK this is the case univ in the proxinutv
of the base of the fure femora.

6. I). tl'tricilA, n. sp. % and $> . — Obscure viridix, rariua cni.ipus,
antennis pediluisiiue nigiis, ai)icali ffinoiuui tiieiite testaceo, inlV'iiuiilni*
oculorum ciliis llavicantilxis, alls cinoreis. ^. Facio exochraceo-ciiie-
rea, laiiitdlis hypopycii alliidis, ultimo tarsoruin anticoriim articiilo
dilatato, tibiis posticis cnisi.siusculi^s. ^. Faciu albiila, pedibus simpli-
cibus.

Dark green, seblom coppery; antenn.T and feet black, the last tliird of the
femora brownish-yellow; cilia of the inferior orliit yellowish; wings
grayish. ^ . Facre yellowish-gray ; laiiiellie of the hypopygiuni whitisli ;
the last joint of the fore tarsi enlarged : hin<l til>iie somewhat thickened.
9. Face white; feet plain. Long. corp. 0.18— 0.20. Long. aL 0.20—
0.22.

Dark jrroen, Ijrijrht ; the last se<iineii{s of the abdomen are
usually dark bronze-colored, and sometimes the color of the body
is everywhere very coi)pery. Anteniue black; the third joint
almost ronml, still with a sharp projection at the tip. Front me-
tallic o'reen. The face of the male not very narrow, yellowish trray ;
the face of the female much broader, whitish. J'alpi bhick, dusted
with whitish on the edjic, jjarticuhirly in the fenmle. Cilia of the
inferior orbit yellowish, sometimes nearly whitish. Ilypopyjiiuni
with elliptic, whitish lamclhe of moderate size, which are bordered
with black on the upper and apica' inaririn ; the latter is somewhat
jajrjiod. Coxie black ; fore coxte with black hair.s and bristles, only
very slightly dusted with white. I<\'et black; the last third of the
fore aud middle femora, as also somewhat nu)re than the last (piar-
ter of the hind *"emora, reddish luteous-yellow or almost yellowish-
red; the hind femora before the tip with a seta, not ciliated uj)oii
their under side, even in the J*. The tibiie show only at the very
extreme base a lighter color; in the 9 all til)iie are of a i)laiii
structure, in the (^ the hind tibiae are conspicuously thickened.
The 9 has plain tarsi, in the male the last joint of the fore tarsi
is flattened from the side, and enlarged above into a lobe; the
first joint of the hind tarsi in both sex-s is but little fringed witU

Xj I

' H

' !l

:.' ■; i

1

m

■!!■;•
■ li' .

5^' ■;

i'

1

!

1

34

PIPTKUA OF XoKTII A'.II.KICA.

[I'AUT M

tlioni-likc bristles. Cilia of tlic tcjrulic black. 'Wings grayish
with hrowiiish-ltlat'k veins; the hi.vt section of the fourth longi-
tudinal vein has a ralher ^lrong tlexure in tin; middle, but from
that jioint runs nearly parallel with the third longitudinal vein;
the J" has no swelling of the eosta at the tip of the first loi!j;:-
tudinal vein.

JIah. Fori llesolutlon, lluds. IJay Territory. (Ivennicott.)'

T. !)• acilllliiiatlls Loew. % nnd 9. — Obsruro viriflis, piHlnni nf-
grorum tibiis anticis ex flavo fiiscis, tacie allul, ciliis ociiloruiu inferiori-
bus alliis, tegularum ciliis iiigris, laiiicllis l»y[)opyj5ii iiiagnirt, auiitis.

Dark green ; tlio fet*t black, fore tiliia; biowiiish-yHllow ; fice whito; cilia
of tilt) inferior orbit wliite, of tlie teguhf black ; tlie large lanieli;e of tb«
Iiypo'iygium pointed at the enil. Long. corp. 0.15. Long. al. 0.14 —
Clf).

Sy.n. Dolirhopus nruinlndfus LoEW, Nene Beitr. VIII, 12, 4.

3fah'. Dark green. Face tmrrow, white. .;\ntenna; black;
their third j\)int short. Front metallic green. Lamelhe of tlit;
liypopyginm white, large, spatide-shnped, pointed, so that tht»
upper and the lower nuirgin strike together and there is no dis-
tinct apical margin ; the upper one has a narrow black border
and is ciliated with minute blai-k hairs. The black femora with
a bluish-green reflection, and their extreme tip brownish-yellow;
fore t'bisc upon the greatest jjart of the u])per side brownish-yel-
low, dark brown beneath; fore tarsi brownish-black with yellow
base; middle til)ia> and middle tarsi browni^l!-l)lack. still the base
<»f the latter yellowish-Iirown ; hind tibiae and himl tarsi entirely
black, the latter sparsely bristly upon the first joint. Cilia of the
teguUe black. Wings hyaline ; the costa at the tip of the first
longitudinal vein not thickened ; the end of the fourth vein con-
vertring towards the third; the hind transverse vein somewhat
less steep than in D. ovnfus.

Female. Very much like the male. The white face much
broader than in the male, still not so Ijroad as in the female of
7). albieiliafi(s. The yellow coloring upon the upper side of tli*'
fore tibiic is not only generally lighter than in the J*, but also
often distinctly observable upon the first half of the U])per side of
the middle tibiic.

Hub. Washington. (Osten-Sacken.) Illinois. (Lo 13aron.)

;■■ '*'K .

Imr.TfllniMS.

J.y

8. D. ovntlls liOFW. % . — Ohscive viiiilis, pt'dinn Tiiu'i-oruiii tiliiis nn-
ticis ex ti/ivo fusi-is, f.icii' alliil, I'iliir^ ofulonim iiit'eriorilpiis alhidis, teuu-
l.irum ciliis nigris, lainellirf liyjiopygii parvis, rotuiidato-ovntis.

Dark green ; feet lilafk, forci tiliiie Itrowiiisli-yellow ; face wliite ; ciliiv of tlnj
inferii-r orbit wliitisli, of the teculje Mack; luiiiellai of tiie liyimpvLiiiim
small, rouiiiU'd-ovate. Loiij^. corp. (Mfi. Long, al. tM4 — U.l.'j.

Syn. Dolirlin/Dis nnitiis LoKw, NeuH Beitr. VIII, 13, 5.

Fiu'c narrow, white. Aiilciiiiii' Idnck, lliinl juiiit sliort. Frniit
liK'tallic frrt'*'!). Ciliii of the iiiferior nrhit whitish. I.iUiii'llie of
the hypopyiriuin while, rntlier siiiiill. rotiiKlisli-ovate, on tlie iiii|i('r
and ai»ieal iiiar}j;in with a narrow black lionler, on tlie hitter split
into a ))ristle-like lohe and t'rinired with hlaek lirislles. I''ect,
bhiek ; the femora with a .>ioinewhat jrreenish reflect inn ; their e\-
trenie ti^» hrownish-yellow; the root of the fore and inidtlle tarsi
are of the «anie color. Fore til)ia' npon the jrreatest jiart of the
upper side hrowiusli-yellow. l)eneath dark brown. Middle iii)i;i;
and middle tarsi l)rownish-bla('k. Hind tibiu' and hind tarsi
Ijlaek. Cilia of the teo-nhe l)lack. Wings hyaline ; tlie cnsta iif.
the tip of the first longitudinal vein not tinckened. The end of
the fourth longitudinal vein converges towards the third ; the liind
transverse vein straight and steep.

JTab. Middle States. (Osten-Sacken.)

Observation. — The J of J>. (>r(ili(f>, wliicli is not known to me,
must resemble very much that of /). aciimindlnK. IJcsides the
but slight discrepancy in the color of the feet, the dilference con-
sists i)robab!y in the coarser hairs on the fore co.xie ; at least ih"
hairs in the ^^ of D. ov(ifii!< i<re coarser and also longci' than in
that of ./A (tciiii>iit(itii.-i. The difference in the direi'll<in of the
hind transverse vein, in the males of both species is not suHieient,
to be relied upon for an easy discrimination of the J of llie same
species.

I. :

! ;(!■

.; , ' »'n

■f.

1^ li

II. Prevailing roi,ou of the feet VELLowisir.
A. Cilia (if the inferior orhit hla<h\

9. D. pacliycneiniis Lomv. %, and 9- — Aeneo-viiidis, antennn,
oculonirn tegularunnnie ciliis nigris, coxis oninilms totis <il>S(iiiis, ju'di-
bus flavis, diniidio tibiarutn posticarum apicali, tarsi.s inteiniediis indrt
ab articuli primi ajiioe, posticis(]ne totis nigris.

%. Tarsis anticis attenuatis, artieulis tribus ultiniis atri.-^, conipressi.s,

■■ (■'

J,- ■■

i':.':i '

■ -■;

;,■■■■ '' ■•' ""

.,■'■'

't-4

m

u.

8G

DTPTEUA OF NoRTir AMKRIPA.

[part It,

dunbufl ultitnis valde diliitiitiH, feiuoril)U!i i)OHt!uia nigro-uiliutiH, tibiit

9* IVdibud HiiiiplivibuH, tai'!ti8 autiuL-i iiide ab nrtiuuli primi apice iiigrld.

Metallic gruttn ; aiiteiinnD, ciliu nf tlie iiift* rior orbit and of tliu tHgulio black ;

all coMu untiivly diuk ; Unai yellow ; tlic wliolu Hucuiid liult' ut tbc hind

tibiiv, tliH middle turui from tlin tip of the liriit joint iind the whole hind

tarxi bluck.
^ . Fore tarsi attenuated ; the three last joints black, compressed, tlie two

last joints much enlarged; hind femora ciliated with bluck; hind tiliiu)

incrassated.
5 • Feet plain, fore tarsi from the tip of the lirst joint blackened. Long.

Corp. 0.25— 0.2t). Long. al. 0.22.

Syn. Dolichopus parhyr.nemna LoKW, Neue Beitr. VIII, 13, 6.

Dark metallic grocii, brijrht. Face of the J* narrow, ocliri'-ycl-
low; face of the 9 l)r()a(l, •rrayish-ycllow. Aiittiiiiio entirely
Mack; the third joint ovate. Front hrij^ht, {generally for the most
l)art steel-blue. The cilia of the inferior orl)it Ithick. Thorax
with a rather broad brass-cohjred middle line. i\bdomen cojjjtery
towards the end. All the coxiu black, only their extreme tip
somewhat brownish-yellow. Feet dark yellow ; hind femora on
the extreme tip darker, before the same with a stronj;- l)ristle; all
tibiie with numerous bristles; hind til)iiu upon the entire second
half i)lack; middle tarsi from the tip of the lirst joint black;
hind tarsi entirely black. Teji'uke with black cilia. Wii\{?s some-
what shorter than usual, in the 9 somewhat more dusky than iix
the male, esj)ecially somewhat darker towards^ the fore nmrgin.

Male. Fore tarsi not very much loiijfcr than the fore tibiae;
their lirst and second joints slender, stalk-like, yellow; the first
one much lonfjer than the second; the following joints black, flat-
tened; the third iSomewhat broader towards the end; the fourth
much enlarged, of a nearly triangular form, beset upon the ui)per
side with short, close, minute black hairs; the fourth joint is like-
wise much enlarged, still not as broad as the third, and of a more
ovate form. Hind tibise much thickened, stoutest in the middle,
and marked upon the ujtjjcr side with a narrow pale line running
from the middle to the tip; hind femora ciliated beneath with long
black hairs. Lamella) of the hypopygium dingy yellow, with a
broad black border, of moderate size and of a rather round shape,
jagged on the apical margin and fringed with I)lack bristles.

jfemale. Feet jdain ; the fore tarsi rather blackish already from

^'di

DOLiciiorrs.

37

the tip of tlic first joint, which is si»iiictiiiu'.s tho case in ^ , l»ul
only in vcrv (iiirk-culitrcil siicrinicns.

Jlub. Mi(Ulle Slutt's. (OnlLU-.Suri\(.'n.) liiinitis. (Konnifoit.)

lO. I>. brevlpeiiniH Mi;io. % and $>. — Aonco-viridis, nutfiuiiy,
mnilorum tcgulaiuiiKiiiu ciliis tiigiis, coxiH anticiH prnetei- liiisiiii ptMli-
t)usi|u*! tliivis, tiii'Mtti tiliianim ]M)sticai'iiia a|iii'.'ili, tiirsis inttMini-ilii.i
indf all ai'ticiili {niiiii aiiice, ]io>ti(!isijiit; totis iiigris.

^. Tai'sis aiitiuis atteiiuati!«, nrticulis duoluis iiltiiiiis atris, coniprMSsi*,
ultiiiKi ••\iiiii»' (lilatato, feiiioriliiis ]i(isti(us palliile-riliatis,

9' IV(libii8 »imtilicil>U:j, tarsiH aiitiii.s indu ab articuli ]iriiui a{iicH iiii;rifl.

Metallic-gre»'n ; aiitenniP, cilia of Uih inffiior orbit and of tlin tcgul.'e Mack ;

foiH coxa?, exit'pting tlie basin, and feet ytdiow ; tbe last tiiird of tlit»

hind tibia', the iiiiddlu tarsii from thu tip of thu lirst Joint and the wliolt)

hind tarsi blac^k.
% . Fore tarsi attenuated, tho two Inst joints black, llattened, the last one

extreinely enlarged; tlie hin<l femora ciliateil with pale liairs.
5. Feet plain; the fore tarsi from the tip of tlie first joint black. Long,

Corp. 0.24— 0.25. Long. al. % 0.22; 9 0.24—0.25.

Syn. Dolirhopns pliiviilorsi'x (var. B.) Fallkn, Did. 10,4.

IJollrfiiipiifi hreriptnniis MKroKN, Syst. Ueschr. IV, 8!*, 27. — SxANNirs, Isis,
1831, GO, 12. — ZiCTTKiisTKiiT, Ins. Lapjf, 700, 8. — SxAWfKU, Krilyer
Tidsskr. IV, 2:?, 13.— ZKrrEUSTiiDT, Dipt, ticand. II, eo:5,— Wai.kkk,
Dipt. Urit. I, 100, 10.

l)jirk mctullic frnrti, hrifrht. Front jriTon. Antoiiine l)hick.
Face of till' (^ frrnyisli-yt'llow ; that of tho 9 frrayisii-whitc,
slitrhtly yollowisli, nmcli broaih'r than in the (^ . J'alpi brown.
Cilia of the inferior orhit bhick. ]Iyiio]»yfri in black. Lainclhe
larire, ol)lon.<r-ovate. iliim-y-yellowisli, witii a broad black border,
on llie a])ical nnirfrin somewhat Jajrjred and frinjred with crooked
black bristles. Tlie hind coxie lihickish, only (jn the e.xtrcnie tip
yellow. Fore coxai yellow, hairy with black; on the outside of
the basis witli a somewhat trian<rnhir frreenish-bhick sjiot. Feet
yellow, Hind femora before the end oidy with one bristle; in tho
J* tliey are s))arsely ciliated beneath with very lon^. yellowish
hairs. On the liind tibiie the hist third at least is Itlack: hin<l
tibia; of the J' perceptibly stron!>-cr than those of the 9, but not
near so stronjjj as those of the nnile of J>. jni<-h;/<'iu'ntnx ; they
have no lar<re bare spot upon their hind side, but at the end of
the upper side a straijrht, pale, longitudinal line occupyinj^ the
whole of their last third. The fore tarsi of the ^^ are about 1^

•I

.'it

\\'' ■I: ;■

M i ^

M

88

nil'TKIlA op NOHTir AMKIUCA.

[I'AKT IT.

' 1

tlie leiijftli of the tiltiii'; tlnir llin-c lirst juiiits are slylc-like,
very allciiimled, t^eiienilly lii«t\viii.<li-yelltj\v ; llieir iwn lii>l joints
an- liliu'k, lltilteiicti IVoiii the side, tlie iii'iiultiiimlt; l)iit liltle, the
lust Jiiiiit on the coiilrary vei'y iiiiich eiihirfred. 'I'lie t'oiv tai^i of
IIk; 9 lire phiiii, bhickish IVolii the tip of th(! lirst joint. Miildle
tursi of liotli sexes pluin, Maek from tiie tip of tiie first joint ; upon
llie second iiiilf ttf the upper side id' their first joint a single stnuijicr
l)rislie is inserted. Hind tarsi always aitoji-ftlHr Idaek. Cilia of
the teu'iihe Idaek. AVinjrs id' the J* somewhat le<s grayish than
those of the ?, proportionally somewhat shorter and more ptdiited,
with a struiij^ .swellinij: of the eosta near the tip of the lirst loii^i-
tmlinal vein. The hind transverse vein almost perpendieular ;
the last pnrlioM of the fourth loii<jiitudinal vein not lirokni.

JJdIi. Fort llesolution, Hudson's l»ay Territory. (Keiinieott.)
Oltsi'rralion. — The identity of Mr. Keiiiueolt's spceiniens with
tlic European 7>. Iircri/icniiia may ho cuusidored us doubtless,
after the must careful t'oiuparisun.

'■•',11' I

'r-

1>. Cilia of' I he iiifcriar orbit pale.

A. Cllhi 'if till' t( i/iil:r jin'f.

1. AnttMime black, at tlm utmost tiio liuucr jmrtion of the first joint rod.

1 i. 1>. lUllgilliailllM I.oKW. % anil f. — Avnco-viiiilis, fai'io maris
palliile Ofliraut'tl, fconuiifo e.v Uavo ciner/tsccntt', aiitfnni.s iiimis, ciijis
oculnruni ititVriorilius ti'unlarunniiiH cilii.s (lavit-atitiiius coxaruni aiiti-
carum lUmiilio hasali oliscuro, jx-iiiiius tlavis, tarsis ]p(isticis totis iiicris;
maris ultimo tardorum anticoriun artieulo vaUle dilatato IVmori basque
posticis ciliatis.

Metallic gn'i'n ; the fare of tbo % pal" ochrt'-yt'llowisli, that of the 9 yel-
l(i\visli-i.'i-ay ; aiitiMiiia' black ; cilia of tlic inlVrior orbit ajid of the tepub-n
yfllowish ; basal half of the fore coxiu ilaik ; feet yellow witli entirely
black hiiiil tarsi, last joints of the % fore tarsi enl,ir;,'eil ami ^ hiud
femora ciliateil. Long. eorp. 0.2(! — 0.27. Long. al. 0.27 — 0.28,

SvN. DolithoiniA liini/imaniis LoKW, Neue Heitr. VIII, 14, 7.

Uronze-ji'reen, rather bri^ilit. Taee of the ^ narrow, pale
oehre-yellow; face of the 9 rather hroad, liii'ht yellow-gTiiyish,
Antenme entirely black, lower corner of the third joint with a
scarcely ])ereeptil)le lifrhter colorinii'; third joint of the antenna!
in the ^ short ovate, in the 9 almost round. Front bria'ht,
green or blue-green. The cilia of the inferior orbit yellow.

iHll.h ||Ol>l'S.

3'.>

Vitpcr siilc i»r till' tlioi'iix .sniiu'wliiii |»riiiiiuso, witli a ('(ipiK'n'
iniililk* stripi' iiiid whii u sonu'wliiit ((iiiptry-nilorcd murk (Hi each
n'uU' In'Inrc till' triiii>\fi's<' Mitiiir, suiuciiiiu'.s cuppcry on a lai^irr
I'Xtfiil. IJasiil pDrtioii (if thu Unv cuxu' lilarkisli licynml tlif initl-
illc; on tiK' iiiidillc ami liiiid ones lliis ciiloi-iii^' cMtinIs aliao.st as
far as 1 lie cM nine tip. Feet ydlitw ; lore tarsi liinck at the tip
only, initMIc nm-s I'nim tlii< tip of the first Jnini ; liiiHl tarsi ciilinly
lilack; till' liiml IV'imira Im-Ioit tlic tip with a hrisilc. Tt-jrulu' with
yt'llnwisli cilia. Winers ratlifi' lar^c, liyalim- ; tlio lourtli Innji'i-
tmlimil vi'iii not l)rok<'ii.

Male. Till' lamcllii' of the liypopyuMiim wliitisli. on the Ul»p('r
mai'u'iii with a narrow, on the apical one with a liroadcr Itlack
liordcr, ovate ; their apical marjiin is frinj^'cd with lilack Itristles
and jaji'f^ed on its lower part. Fore larsi slender and nearly twice
ns lonj? ns the tibite ; the four lirst joints yellow ; first joint as lonu;
as foiir-lil'ths of the tibiie; second j<iint half as lonj; as the first;
the third one bnt little shorter than tin second; the fourth only
nl)oia half as lonj; as the third; the tilth joint but little loiipT
than the fourth, black, flattened, beset upon the upper imirjrin
with appressed black hairs. JlimI femora upon the second half
of the under side closely ciliated with yellow hairs. Jlind tibiie
somewhat stout, without, bciii^^ actuiilly thickened ; they an;
irlabrous upon the anterior Imlf of their hind side. Costa near
the tip of the lirst longitudinal vein with an elongated swellin<;.

JIdh. F]n<iTish river. (Kennicott.) West Point, N. V. (Us-
leii-Saekeii.)

k'Xi

'l >'■

Mf

1"1. D. bl'«»vilimiHJS LiiKW. %. — Aeni'o-viii<lis, fncin .iltiil, nnti'ima-
luai iiigrai'Uiu articulo priino tsiilitus luto, (.'iliis (iculonim iiit'i'iiorilius
all)is, ti'gularuin ciliis pallida tlavifaiitilnis, iii'dilms tlavis, enxis aiiticis
coiicdloiilius, tarsis aiiticis n.\ tlavo jiallide I'tTiiiijiiifis, iiitiTuieiliis inde
alt ailii'uii in-iini ajiice j)ostii;is()Ue totis {•iiiu tilii.imiii n\tui' iii^'iis.

Mftallic-gifeii ; face \vliitn ; tlie tlist joint of tin- Idaidi antenna' ujtoii tlie
uiidtT side r»'d ; cilia of tlie iiitVrior orliit white, of tlie tcuala? yeljowisli ;
tlie fdiv ci).\;c ;niil fV.'t yellow ; tljc fore tai>i i>;ile rnsty-ln'owiiisli ; inid-
dle oiit's from tlie tip of tlic lirst joint and tlu' wliolt- hin^ onfs, including
tlie tip of liie tilii.i', lilack. I.onL.'. corp. 0.17. l.oni,'. al. U.17.

y-i-.v. holichojiita lin ri IIIU litis LoKW, Neue Hoitr. VIII, 14, 8.

Metallie-,trreeu, brijjfht. Face white. Anteniiie black; the
whole lower nnirgin of the lirst joint red ; third joint ovate, not

T f ■

i

n. ti

i'-r iHI

40

DII'TKUA OF NOUTII AMLllICA

[part Jl.

rduiidc'd at the tip. Front hrijrlit l)luisli-}rrc('ii. Ciliaof tin* in-
ferior orl»il white. Laiiieilsi' of tlie liypopyfiiiiiu wliitc, of incdiiim
sixe and of oviite form, upon tli*' upper and a|iieal nniruin with a
narrow blaciv Itonh'i', and friiifred wilii I)lael< l)risties; on the
apical marfrin somewhat jajrfi-ed. Fore ('oxa> vellowisii-wliite, with-
out minute hlacl< Imivs ni»on tli" anterior side; miiMIe and hind
coxie l)lael<isl» witii wliitisli-yelhiw tip. Feet lifilit yellow ; hind
femora l)eset with somewhat lonjrer minule l)laek hairs, without
heinjr actually ciliated. Hind tihiie ])\i\\u, upon the hind side
without glal»rous stripe, at the tip hiaekish. Fore tarsi only
as loiij? as the tihise and hut little darker than those, yellow-
lirownish ; middle tarsi hlack from the ti|) of the first joint; hind
tarsi entirely bhiek. 're<;:uhe with pale yellowish cilia. Wings
hyaline, towards the fore marii'in with a faint l)rownish-<j:raY
tiufj^e; eosta near the tip of the first loiijritudinal vein allhouu'h
.somewhat stouter, not actually thickeneJ; the fourth longitu-
dinal vein not broken.

Hab. Washington. (Osten-Saeken.)

.:-M^^

m.i>

■i)

. |!

iiiiiiillljiii;.

i;j. D. socilis LoKW. %. — A;'ni>o-v! idis, facMe alba, mitcnnnnnn ni-
granim artii'iilo i)iinio siil tus lufo. . ,liis ociiloruin infcrioriliiis alliis,
teirularniu ciliis tliluti! lla»-it"aiitilpus, jifdilius llavis, coxis aiiticis con-
coloril)Us, tai'sis antfrieiilnts iiidn al) artiiaili i)riiiii a]>ice, apice tibiaruiu
postioa.uiu tarsis(iui! post^'Ms totis iiigris.

Metallic-grot'ii ; fai'f wliito ; the livst joint of tlio Mack niitcDn.T njinn tlie
under side red ; eilia of tlie inferior oibit white ; eiiia of the tegulic pain
yellowisli ; fore eoxiv and feet yellow, the four anterior t.'irsi from tlie
tip of the lirst joint, ilie tip of the hind til)i;e and the whole hind tars-i
lilaek. Long. corp. (•. 17. bong. al. tl.lT.

Syn. Doiirliopiis suciiis liOHiV, BimI. Miitoni. Zelt>:ehr. VI, 211, tiO.

Metallic-green, bright. Face white. Antenmo l)lack ; the
whole lower margin of the first joint red, the third joint ovate, not
rounded at the tip. Front hrighf, liluisli-green. Cilia of tln^ in-
ferior orltit white. Tjamelhe of the hypopygium white, of medium
size, ovale, on the '.ipper ami apical nnirgin with a iiarrow black
liorder and fringed with black I)risth>s, on the sipical margin
somewhat jagged. P'ore coxa^ yellowish-white, without minute
black hairs upon the froi-. side; middle ami hind co.xse blackish,
with yellowish tip. Feet pale yellow; himl femora ui)on the un-
der side with but extremely short liardly visible hairs; hind tibise

DOLU'IIOI'US.

41

MiU'kish at the tip; \}\)(m the lii'ul side witliout jrlahrons sti'ipi",
I'oro tarsi hut littlo h)n{f('r than tiu! tihitu, ratlicr sloii(h'r, hiackciicil
from tiu! tip of tiie first joint, still so that tlio extreme hasis of tlio
second and sometimes even tliat of the third joint remain pale ;
the last joint of the fore tarsi is lijrht rusty-hrownish ; middle tarsi
from the tip of the llrst. joint hlaek ; hind tarsi entirely Itiaclv.
Cilia of the tefruhe i)ale yellowish. Winjrs hyaline, towards tlK3
fore inarji'in with a faint brownish-frray tin<;e; the eosta near the
tip of the lirst longitudinal vein only very little stouter, but not
thiekened; fourth loni^itudiiial vein not broken.

Hah. lU-nois. (Ii(; lianii.)

ObfierraliDn. — In order to distinfruisli D. .^onus from the very
like J). I>rcvii)ia»u.'<, it is only neeessary to ])ay attention to the
dilferenee in the length and coloring of the fore tarsi and also to
the diflerent nature of the hairs <mi the under side of the hind
femora. Krom JJ. xi(hfili(i( !(.•<, nid'us and xphnidiilKx, J). .-^x/Ks
dilfers by its hind tibisc, which arc distinctly blackish at tlu tip,
whereas in 7>. Hiibcili(iti(!< and »«a/».s they are only slightly infus-
eated at the tii), and altogether vellow as far as the extreme tip

in

D. Kplcndidus. From J), t^uhviliafus and />. f<iilc)uh'(li(s it
further dilfers by the I'cd coloring of the lower margin of the first
joint of the antenin« and by the hind femora of the ^ which are
not ciliated ; from all three al)ove mimed species it differs by the
plain fore tarsi of the J*.

14. D. nudlis, n. sp. % and 9- — Viridis, nitidn.i, poxi's anticis pcdi-
busqiie rtiivis, apice tibianini posticaruni siibfiisfo, antiMiiiis pia'tcr iii-
fei'Uin articuli priini inargiiu-iii tarsiscjue jjostici.s iiigris, ciliis ouulorum
inferioi'ilms teLMilariiUKiiie cnliis llavicantibus.

%. Tarsis anticis elongatis tunuiljus, aiticulo ultimo dilatato atio, ftnuori-
bus posticis lion ciliatis.

9. P»Hlibus siuiplicibus, tarsis anticis in<l(« ab articuli prinii apice niirris.

Green, bright ; fore coxne and feet yellow ; tip of tlm hind tibia- brownisli ;

hind tarsi lilack; lower margin of the first joint of the black anteiniie

red ; cilia of the inferior orbit and of the teuiibe yellowish.
%, Fore tarsi elongateil, slemler, their eiihirged last joint black; hind

femora not ciliated.
9 . Feet plain ; fore tarsi from tlie tip of tlie first joint blackened. Long.

Corp. 0.21—0.22. Long. al. 0.2.').

Male. Metallic-green, b.ight. Front nn'tallic-gre;-!). An-
tenna; black ; the under side of the first joint yellowish-red , third

•f-. >

I

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H

y^

42

DIPTEUA OP NOHTII AMKRICA.

[part It

I '•ll'ti'.^

jniiit rather l)lui»t at the tip. race odire-yolh)\v ; palpi yellow,
{'iliu of the inferior orhit pale yellowish. IJypoiiygiiiiii black;
laiiieihe of medimii .size, ovate, white, with a rather narrow hlaek
hordcr, on the apical niaru'in Ja<iji,'e(l and friiifred with hlaek bristles.
F Jiir posterior eoxiu l)hickisli with yellow tip. Fore coxa) yellow,
only somewhat blackened at the extreme basis, l)eset upon the an-
terior side with delicate ])iack hairs, which reach nearly to their
l»ase Feet pale yellow. Hind femora before the tij» with a bris-
tle, npon the under side only with very short niinute pale hairs.
Hind til)iie stout but not exactly thickened, U})()n the lirst half of
the hind side without hairs, at the extreme tip brownish. Fore
tarsi twice as long as the til)ia! ; their four first joints very thin,
yellow ; lirst joint nearly as loiiu: as the three following oue.s
together; the third somewhat shorter than the second; the fourth
hardly half as long as the third; the lifth joint black, flattened,
bi'oad, still not as large as in J>. haliUij'cv ; \\\nm its upper margin
it is beset with appressed minute black heirs, ^liddle tarsi from
the tip <tf the first joint blackened ; hind tarsi entirely black. Cilia
of the teguhe yellowish-white. "Wings hyaline ; near the tip of the
lirst longitudinal vein with a long but iiot very thick swelling,
which gradually merges into the costa ; fourth longitudinal vein
not broken.

FvDKtlf. AVings and feet jtlain, fore tarsi from the tip of the
first joint l)lackeiie(l. All the rest as in the male.

Jhib. Fort Resolution, ITiidson's IJay Territory. (Kennioott.)
Ohftfrra/ion. — The resemljhuice of the })resent sjiecies with D.
snhrih'(i/((s is so great that, as Itoth occiir in the same region, I
was for a long time in doubt wlu'ther I should consider them as
two species. As the unfringed under side of the hind femora of
my two J' of />. mtdu' does not seem to be rubbed off; as, in both
sexes, the lirst joint of the aiitennie is tinged with red on the under
side, and as there ar<' soiiu' other dilferences besides (which will be
seen by the comparison of the descrijitions of both species), I am
leil to the conclusiou that there is a specilie diflerenee Iietween I).
vinlii.-< and />. suixu'lid/us. It is very striking how closely allied
the species of some groups of >'orth American Dolichopus are.

Im'^%'

\ "■'

M|

\

Is-

R^

f'-w'^i?W>' '

\

:vM-4»; '"n

i!>>WT

ikxefi''^^^

, J

■Hi^

"

\

15. n. silbriliiltllH, n. sp. %. — Viiidis, iiitiiliis. ooxis anticis jitnli-
liusi]ue llavis, apico tibiiirum posticaruui subfusco, aiiteiiuis tarsisciue

DOLTCirOPUS.

43

pnsticis nigris, ciliis oculoiuia jiifeiioribus tegularumque ciliis flavican-
tibus.
% . Tfirsift aiiticis eloiigatis tenuihus, articulo altiiiio diliitato atro, femo-
rilius posticis rare tiavo-ciliatis.

9

Green, shining ; foro coxje and feet yellow ; tip of tlie hind tihi.T lirowiiish ;

antennse and hind tarsi black ; cilia of the inferior orbit and of the tegulie

yellowish.
% . Fore tarsi elongated, slender ; thn enlarged last joint black ; the hiuJ

femora sparsely ciliated with yellow.
9 Long. Corp. 0.21— 0.22. Long. al. 0.2').

M('tallii--jrrcon, l)rit;lit. Front iiR'tallic-fii'ecii. Anteniiii; black;
on till' uiidcr sido t»f the first joint I am not ai)lc to discover any
li^'liter colorinjj:; third joint ratlior hlunt at the tijt. Kiicc g-rav-
isli-yellow, nearly oclire-ycllow. Palpi yellow. Cilia of tlio in-
I'urior orbit palL'-yellowisli. IIyi»oi)y<>;inni black; lanit.-lla'ornicdinnj
size, ovate, wliitc, with narrow black border, on the apical niarji'iii
somewhat ja,aj>ed and frin<>'ed witli black bristles. The tonr poste-
rior coxiL' l)lackish witii yellow tip. Fore coxie yellow, oidv at
the extn'me basis somewhiit blackened, upon the anterior sid(>
beset with very delicate black hairs, wliicii do n((t reach to their
base. Feet pale yellow. Hind femora with a bristle before the
tip, u])on the jrreater part of the under side sparsely ciliated with
moderately lonji' yellowish hairs. ]Iind tibiiu slont, but not
exactly thickened, not hairy n[)on the liist half of the hind side;
)»rownisli at the extreme end. Fore tarsi twice as loiio- ns the
til)iie; their four first joints very slender, yellow; the lirst joint
nearly as loiijr as the three followinj,' ones too^iher; the third
somewhat shorter than the second; the fourth hardly half as lonj;
its the third ; the liftii joint black, flattened, broad, still not ns lai'fi'e
as in J>. hriliUifer ; upon its upper edji'e it i ■ beset with apjiressed
minute black hairs, ^liddle tarsi from the tip of the lirst joint
Idackeiied. Hind tarsi entirely black. Cilia of the tefiula- yel-
lowish-white. AVinjis hyaline, somewhat li'rayish, at the tip of the
first loufritudinal vein with a lonf>' but not very stout swcllinir,
which fxradually mer,ii-es into the eosta ; fourth long'itudiiml velu
not broken.

Jlab. Fort iresi>lution, lluilson's Ibiy Territory. ( F\ennic<itt.)
Obttn'rntion. — Tiio necessary data for the distinction of this
species from the forogoiug, is contained iu the description of Iho
latter.

■, ,■'■<-,•

I,',:: .■■(:

>!■?:*{

.m

:-4

t':i'-

i n

'?W

44

DIPTERA OF NORTH AMERICA.

[part IX.

16. D. Hplendidlis Loew. % . — Aeneo-viridis, liptissime oupreo mi-
cans, pedibiis Uavis, coxis anticis tiliiisiiim jiosticis totis conuoloribiiH,
antennis tarsis(jue posticia nigris, ciliis oculorum iiifuiiuribud teii^ula*
ruinqiie ciliis tiavicantiliiis.

% . Tarsis anticis iiiodict! elongatis. articulo ultimo dilatato atro, femoribua
posticis confeitira flavido-cilia^is.

9

Metallic-green, with a brilliant coppery-red reflection ; feet and fore coxae
yellow, bind tibise not darker at the tip; anteniue and hind tarsi black;
cilia of the inferior orbit and of tlie tefuhe yellowish.

%. Fore tarsi but moderately elongated ; the enlarged last joint black;
liind femora closely ciliated with yellowish.

5 Long. corp. 0.24. Long. al. 0.23— 0.24.

Syn. Dolichopns splctiilidns Loew, Neue Beitr. VIII, 14, 9.

Bronze-frrecn, with a brilliant eoppcrv-rod reflootion, very
bright. Face pale-yollowish. Anteiiiue entirely blaek ; the third
joint short-ovate. Front hrifxht jrreen with a eoppery-red reflect
tion. Cilia of the inferior orbit ])ale yellowisli. Ui»per side of
the thorax with an almost i)nrplish spot on eaeh side l)efore the
transverse suture. liamellie of the hypo|)yfriuin dinjry whitish,
rather larji ; and of an oval form, on the ui)i>er and apieal niarfriu
narrowly lio'dered with blaek, on the latter ja<r,<iTd and friiijrcd
with blaek bristles. The four posterior eoxaj blackish, yellow only
at the extreme tip. Fore eox« entirely yellow, beset U)ion their
anterior side with ratlier minute black hairs, which do not reach
to their base. Feet yellow. Hind femora before the tip with a
bristle and upon the greater part of their under side closely
eiliated with very long yellowish hairs. Hind tibite although
stout, but not exactly thickened, without liairs upon the anterior
half of the hind side. Fore tarsi not cpiite 1^ times the length of
the tibia) ; the four first joints yellow ; the first to the third stalk like,
still not (piite as slender as in the previous and in the three fol-
lowing species ; the fourth joint somev.hat liroader, i)articularly
towards its tip ; the first joint nearly as long as the three following
taken together, the third somewhat shorter than the second and
the fourth distinctly shorter than the third ; the fifth joint black, f^ot-
tened, broad, particularly towards its tip, still by far not as large as
in I), hnlillifer; upon its ui)per margin it is beset with ai)j)ressed
minute black hairs. Middle tarsi blackened from the tij) of the
first joint ; hind tarsi entirely l)lack. Cilia of the tegulaj whitish.
Wings hyaline, a little grayish, of a rather equal breadth; th*

i

■f-

Doijciiopua

45

costa near the tip of tlie lirst longitudinal vein with an elongated
but not very stout swelling ; the fourth longitudinal vein not
broken.

Bab. Illinois. White Mountains, N. II. (Osten-Saeken.)
Obaervulioa 1. — I believe I J)()^^sess also the 9 of this species
in a single specimen, and would not doul)t it at all if the tip of
the hind tibia; did lutt show a rather distinct brown coloring,
which is not perceptible in the J*. All the other marks in the
9 are precisely as they might l)e expected in the 9 of the above
described J*. The fore tarsi are blackened from the tij) of the
first joint.

(Hm'rvotion 2. — D. itplendUhia differs from 7>. sitbciliatus not
only by being much brighter, but i)articidarly by the much less
perceptible lengthening of the fore tarsi and by the much longer
and much closer ciliation of the hind femora of the male.

'III

'-■•• ' .

MM

■fWK

mm

IT. D. batillifer LoRW. % and 9- — Aeneo-viridis, pedibus flavis,
coxis aiiticig tibiij-tjue posticis totis concoloribus, antennis tarsisque
posticis nigi'is, honiin basi tlava, ciliis oculoruin iiifeiioribus teirnla-
riuuque ciliis flaviuaiitibus, maris ultiuto tarsoruiu antiuorum articulo
adiuoduni ililatato.

Metallic-green ; fore coxae and feet yellow ; the tip of tbe hind tibiie not
darker ; antennse and hind tarsi black, the latter at tluj base yellow ;
cilia of the inferior orbit and of the tegulfc yellowish ; the last joint of
the fore tarsi of the % remarkably enlarged. Long. corp. 0.-(J. Long.
al. 0.J5.

Syn. Dolichopus latillifer Loew, Neue Beitr. VIII, If, \

Metallic-green, bright. Face of the ^ narrow, more light
ochre-yellowish than golden-yellow ; the face of the 9 broader and
yellowish-white. Antenme quite black, the lower corner of the
first joint only some\\ hat lighter ; ihe third joint short. Front
green, or bluish-green, bright. Cilia of the inferior orbit yellow-
ish. The more bronze-colored middle line of the thorax often
hardly percei)tible ; on each side before the transverse suture a
bronze-colored spot. Fore coxse yellow, upon the whole anterior
side with a black ))ubescence. Hind coxie only at the extreme tij)
yellow. Hind femora with a bristle before the tijt. Fore tarsi
black only at the tip. Middle tarsi blackened from the tip of the
first joint, still the base of the lirst and of the second joints is often
not quite black. The hind tarsi are of the same color. Cilia of

'Ua

1.

I. )

■! i:

, ■!.

"PP

I'^'i.:

46

DIPTEllA OF NORTH AMKKICA.

[part 11

the tcfrnlto yollowi^li. Wings grayi.sli-liyaliiie ; tlio fourth luugN
tudiiial vein not broken.

jMalc. liiniielhe of ihehypopyfrium whitish, (jf moderate size and
of a ratlicr oviil sliape ; on tlie n|)i»er and apieal nuirgin tliey aro
narrowly hor(h'red witli l)hiek ; on the hitter very niucli jan'tifd
and frihtrcd witli black lu'lstles. Jlind femora very ('h)sely ciliated
with yellow Iniirs on the middle of the under side. Fore tarsi
al>out l}j limes the length of the tibise ; their three first joint > slender
and stalk-like, the first as long as the second and third taken
together ; the second about !{; times the length of the third ; tin)
fourth joint somewhat more than half as long as the third and
somewhat broader; upon the whole under side and u" the upper
side, excepting the tip, whitish ; the lifth joint somewhat longer
than the third and fourth taken together, flattened, extrenu'ly
broad, black with a silk-like reflection ; U])'>n its outside this reflec-
tion takes a handsome silvery hue when viewed in a very oR-
li(pie direction. Hind tibiie considerably thickened, the greatest
thickness somewhat before the midd'o ; the anterior half of their
hind side without i)ubescence. The costa near the tip of the first
lonsj-itudiual vein with a rather elonti'ated swelling.

JIab. West Point, X. V. ; Illinois. (Osten-Sacken.) C

on-

nccticut. (Norton.) White Mountains, N. H. (Oston-8aeken.)

Ifu:

IS. D. eiKlactylus LoKW. % ami 9- — Aeneo-viridis, pedibus tlavis,
coxis anticMS til)iis<|ue pc-^ticis totis coiicoloribufi, niiteiiiiis tarsiscjim
postifis iiicris, lioruni hasi tlava, ciliis oculoiuiii inferiorilius tcirula-
niiJHiue ciliis Havicantilms, tnaris duohtis ultimis tarsoruiu anticorum
articulis dilatatis et feiiioribu.s po^iticid ciliatis.

Metalli(^-creen ; fore cox se and t'oet yellow; hind tilii.T not darker at tlm
tip; the black liind tarsi with yellow root; cilia of the interior oibit
and of the teaul* yellowisli; the two last joints of the fore tarsi of tlirt
% enlarged and the hind femora ciliated. Long. corp. 0.2ij. Long.
al. 0.■2^^.

Sy.\. Dolirhopus eudnctylns LoKW, Meue Reitr. VIII, 16, 11.

Metallic-green, bright. Face of the J* narrow, ochre-yellow-
ish ; the face of the 9 broader and yellowish-white. Antenna;
entirely black, the lower corner of the first joint hardly somewhat
lighter; third joint short. Front green, or bluish-green, bright,
(^ilia of the inferior orbit yellowish. The more bronze-colored
middle line of t''e thorax usually but little distinct ; on each side

iflfl

DOLiciropirs.

47

before the Kiiture a br tizc-cdlored sjxit. Fore cox.t ycllnw, npun
the aiiteriur side witli Ijlaek imltescciice. Tlie lour posterior cu.xie
yellow only at the extreme tip. Feet yellow ; hind t'cniora w ith ti
bristle before the tij). The color of the fore tarsi ehaiijics frnm
brown into black towards the ti|); middle tarsi l)!a<kciicd from
the tip of the lirst Joint ; the hind tarsi are of the same color.
Cilia of the teirnhe yellowisli. AVings g-rayish-hyaline, the lonrth
luiigitiidinal vein not Itroken.

Mali:. The lameliii) of the hypopyjjfium whitish, of medium size
and of an eloii<;ated, ovate shai»e, on the njjper and a|)ical marjiiii
narrowly bordered with black, on the latter much jaji-fi-cd and Iriiiucd
with partly black, partly yellowish bristles. Hind femora upon
the under side s|iarsely ciliated with very loiij; yellowish hairs.
Hind tibite althon<ih somewhat .stout, but not thickened ; the two-
thirds of their hind side from the base are without hairs. Foro
tarsi over 1 ^- times the lenjith of the til)ite ; their three lirst joints
slender, stalk-like; the second Joint measures nearly three-fourths
of the lenjrth of the first, and the third more than three-fonrths of
the lentrth of the second ; the fourth Joint is almost as lont;- as tho
third, flattened .somewhat broader at the end, still even here not
lialf as broad as it is loufr, white, with a handsome silvery rellec-
tioii ; tipon its upper mar<.(in witn hardly visilde short minute
black hairs; the fifth joint is hardly shorter than the fourth, flat-
tened, and somewhat br(»ader than the previous one, black, beset
upon the upper nmr{>;in with short api)ressed minute black hair.s.
The costa near the tip of the first htnjritudinal vein with a not
very considerable l)ut quite di tinct swelliiifr ; the nniririn of the
wiiifr iietween the apex and tlu tij) of the fifth lonu'itudinal vein is
less rounded than usua',, so i uit there is a trace of a shallow
sinus.

Hah. New York. (O.iten-Sacken.) Mass. (Sanborn.)

.:»

W:

■ ■■im-

fir-

::Mm

)•■ ■•''.

\y-'

1!>. D. tonsMS LoEw. % and 9- — Aeneo-viridis, pedibns flavis, mxis
anticis tiliiisiiun postiuis fotis concolorilms. antennis tarsis(nie postiuis
iii^ris, Imruni basi llava, ciliiH oculonun iiitVriorilxis teu'iilariuiKine ciliis
rtavicantibns, maris duobus ultiinis taisonnu anticoium aiticulis dila-
tatis et femoiibus posticis non ciliati.s.

Metallic-green: fore coxne and feet yellow, tlie liind tit)ia^ not darker nt
tlie tip ; antennae and liind tarsi blaclc, tbe latter at tlie basis yclldw ;
cilia of the inferior orbit and of the tegulae yellowislj ; in the % the two

. 1i" ■:

m^

48

DIPTEUA OF NUllTlI AMKllICA.

[I'AKT II.

■ 'its

i !iii,:. r

.:|:'^"

last Joints of tlie fore tnrsi t-ulargeil, uud the liitul ft-inora uot ciliututi.
Loug. curp. 0.20. Long. iil. 0.25.

Sv.N. Dulicliupus tunsiis Loew, Neue lieitr. VIII, 16, 12.

Mftallic-gToeii, bright. Face of the J* narrow, iiioro light,
oclire-yt'llowish than guKlon-ye'lhnv ; the fuoeof the 9 hruaUcr and
yellowihh-white. Anteniue entirely hhick, the lower corner of the
lirst joint only lighter; the third joint short. Front green, *)r
liluish-green, bright. Cilia of the inferior orbit yellowish. A
bronze-colored middle line of the thoiax is not distinct ; on each
side before the transverse snture a bronze-colored sjtot. Fore
C0XU3 yellow, upon the anterior side with rather delicate minute
black hairs, which gradually disappear towards their base. Jlind
toxie only at the extreni > tij* yellow. Feet yellowy hind femora
with a bristle before the tip. The coloring of the fore tarsi in the
J gradually changes towards the tip into brown antl black ; nud-
dlo and hind tarsi black fntm the tip of the first j<(int, still the
base of the second joint yellow. Cilia of the teguhe yellowish.
Wings grayish-hyaline ; the ftturth longitudinal vein !n)t broken.

Jlalc. Lamella) of the hypopygium v,hitish, of medium size and
of an elongated ovate fin'ni, on the upper and apical margin nar-
rowly bordered with black, on the latter much jagged and fringed
with partly black, i)artly yellowish l)ristles. Hind femora not
ciliated upon the under side. Hind tibise of ordinary stoutness;
their whole hind side uniformly beset with minute black hairs.
The fore tarsi more than H times the length of the tibia; ; the three
first joints slender, stalk-like ; the second joint is o(pml to about
two-thirds of the length of the first, and the third to about three-
fourths of the length of the second ; the fourth joint is nearly as
long as the third, flattened, at the end somewhat broader, still
even here not half so broad as long, white, with a handsome sil-
very reflection ; ui)on its up))er margin with hardly visible and
short minute black hairs ; the fifth joint as long as the fourth, flat-
tened, and somewhat broader than the previous one, Itlack, l)eset
upon its upper nnirgin with short and appressed nunute black
hairs. Costa near the tip of the first longitudinal vein without
swelling ; between the apex of the wing and the tip of the fifth
longitudinal vein the margin shows a shallow sinus.

Ilab. Washington. (Osten-Sacken.)

Obsercafion. — The 9 of the three species described above are

i\^'m

DOI.K'IIOIT.S.

49

very cn^y to rotifound. Tlio clianictors l»y whicli tlicy cnn Itc dis-
tinjriiislicd arc as fnllows : 1. fur />. Uiitillifvr ? : ']l\w costu iiciir
the tip of till' lirst loiifi'itiKliiial vein witli ii slit;lit trace nf a swcll-
iiiu", |»i'r('('i)til)li' (inly to a very attfiitivc uhstTvcr ; tliis swclliiij^' is
ratlicr cloiiu'atcd ; tliu ajicx of tin; wiiifjf soiia'wlial Iiroadcr than in
tlio 9 nf the two otluT species; tlie Ion; coxa; Itcsct with ratlier
coarse minute l)hicl< liairs reachinfx almost to the base. '1. for I).
ciidiiffi/lttti 9 : 'I'lio costii nc.ir the tip of the lirst: lonjritudinal
vein with a sliu'ht 'r-iceot'a swelIin'^ which has only a vcrv trilling
extent in lenji'lh; the apex of the winjr sonu'what narrower tiiait
in j'K bdliUifrr, Itut i'loniewhat ItroaiU'r than in J>. Iij)ixiix ; tho
fore coX'.e covered with rather coarse minute Mack Iniirs reachinif
till very near ilu; l>ase. .'}. for />. totisit.s 9 : The costu near the
tip of the lirst lonu-itudinal vein witliout any trace of a swellinj; ;
tlio tip of the winjr somewluit narrower than in the two other spe-
cies ; tho bhick i)ubescence of the fore coxa; more delicate and not
reachinji; as far towards tho base as in tho two latter species.
AVhether the slidit dill'erences in tho coloriiifj^ (tf tho tarsi, percepti-
ble in tho specimens (tf these sjiecies c(»mpared by me, are sullicient
for their sure distinction, can only bo decided by tho oxamluatiuii
of u larjjor number of specimens.

2. Antenna? altogiftlier or for the most part yellowish-red.

20. I), teller Lokw. % . — Viridis, facie ex llavo albidil, antennis .-ufi;»,
ociiloruni ciliis inferiorilms tcgularumque ciliis albiilis, iiciHIms paliiile
flavis, ultimo tarsorunianticorum articulo maris niodice dilatato, nigra.

Green; face yellowish-white ; antennic red ; cilia of the inferior orbit and
of the tegnlfe whitish ; feet pale yellow ; tho enlarged last joint of the
fore tarsi of tho male black. Long. corp. O.ir;. Long. al. 0.17.

Syn. Dollchopus teller Loew, Neue Beitr. VIII, 17, 13.

Green, brijrht. Face yellowis.i-whi'.';. i\ntenntc yollowisli-rod,
the apical inarji'in of tho third joint Ijlacicenti ; arista with a very
short but still perccptiblo pubosconce. Front metallic-frroeii,
In'itiht. Cilia of the inferior orbit whitish. Fppor side of the
thorax not very bright. liamolUe of tho hy])opyj>:ium white,
rounded, sliirhtly bordered with black, on the apical imirfrin some-
what ja!ir<red and frinjred with black bristles. Coxtc whitish-yellow,
the middle ones upon the outside partly jrray ; the fore ones have,
besides the black bristles near their tip, only a very short and deli-

*

■:■ (':'

U'

•■ .'.Mi

\^ :r

■' '^::;'l■'

\:a^

t .

60

DII'TKUA OF NOIITII AMEllIC'A.

A

'11 !l

[part II.

' i

ctitc white i)ul)('S('onco. Feet whit isli-yellow ; hind fcniora Ix-foro
tilt' tip with a l)i'istk', and npon tiio second half of their nnder .side
I'iliiited witii six to seven very hinj? yeilowish-wliite hairs. Fore
til)ia! Ion<; and slen(h'r ; hind tiltiiu rather stout, ImU not thickened,
only lit tlie huso of tiie liind side somewhat glaltrous. Fore tarsi
fdil'orin, over l.^ limes tiie ienjjth of the tihiat ; the four first
joints pah'-yellowish, their relative leiifrth about as T) : 4: .'5: 1,^;
their lifth joint i>ut little shorter than the fourth, somewhat flat-
tened, Mack, beset upon its upi)er side with rather ajipressed I)la('k
hairs. .Middle and hind tarsi from the tip of the first joint brown-
ish. Cilia of the tefruhe yellowish-white. Wiiiji's hyaline, rather
narrow; the costa near the tip of the first loiipjitudinnl vein with a
distinct swellinj::; tin; third lon<ritudinal vein not broken ; the hind
transverse; vein ]»erpendicular and st"<iight,
JJub. Chicago. (Osten-Saelven.)

21. D. variabilis LoKW. % and 9. — Laete virirlis, facie mnris pal-
lido aurea, jhoik! os all'idii, facie lu'iniiifc toti\ allm, antennis rufis, ocu-
lorum ciliis iiifcrioribus albidis, tegularum ciliis llavicantibus, pedibu.s
flavis, alis ciiiereo-hyalinis.

Ilandsoino green ; tho face of the % pale polden-yellow, whitish l)elow ;
the face of tli(» J white ; antenna! red : cilia of the inferior orbit whitish,
cilia of the tepuL-e yellowish ; feet yellow ; wings grayish-hyaline. Long.
Corp. 0.1!). Long. al. 0.1!).

Syx. Dolichopus vnrtublUs Loew, Neue Peitr. VIII, 17, 14.

nandsome green, bright. Face of the J* more pale gold-colored
than (jchre-yellowish, near the oral liorder whitish ; face of the 9
proportionally narrow, white. Anteniue yellowish-red ; their third
joint short, f»vate, generally red oidy at the base and on the under
side, (dherwise l)rownish-l)hu'k, sometimes brown oidy at the tip or
entirely reddish-yellow. Front l>right green. Fore coxjc yellow-
ish-white, beset, besides the black bristles near their tip, with very
(ielicate minute whitish liairs. ^liddlc and hind coxa? of the same
color, but colored with black u]ion the greater part of the outside.
Feet yellowish ; hind femora before the tip with a bristle, in the
J* ciliated upon the under side with very long pale-yellowish
hairs. Fore tarsi of the ^^ about 1^ times the length of the tibitc ;
those of the 9 hardly as long as the tibitc, blackened from the tip
of the first joint, i)laiii also in the J*. Middle tarsi of the same
color as the fore tarsi. Hind tibia; also in the J* not stout, l)ut

, ■■'•\,

rm

pmjriroT'l's.

il

liltoii tlicir basal half nii tlic inside <:-]a1tr(ms. Hind tnrsi usually
«[uito black; SdMit'tiincs tjicii' \\v<\ Juint, with tin- ('.Nccptiun (if the
tip, i.s (inly hniwnisli or even yrlldwisli ; uku'i' Sfldnni the liasi.> <if

Uifir

si'<'(iu(l jdint liiis also tlic same li^ilitcr colonnji'. (,'ilia of 1 lie

tc'Tulio vcll'iwisli.

Wii

i'j:s yravisli livalinc. of rather a

ual lir

ead

the eosta luis in the J* near the lip of the lirst louj;'itu(linal vein a

^ll

H'lit swelliny: ; the fourth louiritudinal vein is not liroken

some-

times the apical j)ortiou of the anterior part of tin; w.nji's show

s a

<iinu'\vliat stronger u'ravi

-h t

nitre,

JIdb. New York. (Osten-Saeken.)

0/>

IM-

t'val

Kill.

■I). I

(iridhiliA

is more variable in tin* colorinir of

the ])ostei'ior tarsi than is usually the ci

se \vi

Ih tl

le siieeies o

111!

genus l>iiJirli(qnif(. \ have received a female as lieloiiu'iiiLr to the
\ariety of I), varidhilix, havinjr li.u'ht feet, which has the tei;ulio
ciliated with bhu'k, and dillVrs besides from the other females un-
doubtedly beloii^'ing to />. varialiiliK, by tlu! iiion; clayisli-yellow
color of its win.^s. I cannot take it for the 9 tif tiic present spe-
cies. In the colorinjr of the wiiiu's and in several other characters it
apiiroaches very much I>. Itilripeinii.-^, but as its hind tibia' are
without b, ;ts, it may pcrhajis not even IicIoult to this specie

I

jiossess also some other females which I can only distinii'iiisli from
the above described 9 of 7>. rdrinbili.-^ liy their black ciliated teunhe.
It seems therefore that either the females vary in the coloriim' of
the cilia, or that wo have here two exceedinji'ly similar species.

.) H

»»ri.

■ I

■J f''

'~ '-i.

■ r

■ i

m

i

If

M

*Z'i. D. liitt'ipeniiis T.

oi;\v.

% . — Laete viridi;?, fi

U'le

alliidf

niitoniiift

I nil-

ocaloi'uui ciliis iiiferioriburt albidis, tt-gulaniiii ciliis llavicaiit

ihii.-;,

IH'ilibiiH Ihivis, tarsis maris simplicibus, alis lutescentilius.

llanilsduie green; face whitisli ; aiitoniiju reil ; cilia (if tbo inferior orbit
wliitish ; cilia of the tcgubo yellcw ish ; feet yellow ; the fort^ tarsi of (he
% plain ; wings yellowish. Long. corp. 0.10. Long. ;l1. O.l!).

,N, J)(ilirli()jius lutcijicniiis LoEW, Neiie Beitr. VIII, IS, l.'

iraiidsome green, moderately liright. The

CO|(

ir of the face

whitish, only upon its iqijier jiart somewhat more yellowish. Aii-
teuiuc yellowi>h-red ; their third Joint short-ovate, perceplilily iii-
fuseated at the tip. Front bright, green-blue. Cilia of the in-
ferior orl)it whitish. I'pper side of the tlionix dusted, and henctj
somewhat dull, with a rather distinct brassy-yellow niiddli; line.
The pidiesceuce of the abdomen is whitish, not only oii the lateral

ii'?ii

52

liII'TEUA OF NOllTIC AMEllICA.

[I'Aiir ir.

Jiiurj^nii, as ill tlio rcst'iiililiiiu: spcfics, hut also ii|)(iii tlii' ^i'lTutcr
Jiai'l ((t'llic iii»|»iT sitlc. liaiiirllu' of llii; liypDpvji'iiilii of oi'iliiiai'V
si/.f, rouiidiMl-ovuto, on llif iippri' and apical niai'i^iii iiarmw ly Imr-
(it'i't'd willi l)iai-l<, liii' ialtiT ja;ii;'(Ml and IViiiffi'd willi hlark lii'islks.
Fort' ••i).\iu }('llt)wish-\vliilt', and i'.\('('|it sunii' i)laclv i»ri,>tl('s nrar
tlicir lip. I)('si't witli (tnly very delicate nunnti' uliiti>li luiirs. Mid-
dle and liind coxiu of the same color, the I'ornii'r darker only at tin;
liasis. Hind femora liefore the lip with a hiaek hrislle, n|Min llio
nndei" side ciliated with ai)out ('» to 7 yellowish hairs; hind tihiiu
rather stont, hnt not thickeiu'd ; in very dark colored specimens
.sometimes near the tip and also n[>on the fore and hind side with
a little hruwii blot; upon their hind side only a short ^lalirons
stripe, which does not reach to their nuddle; fore tarsi slender,
l>lain, al)ont I.', times the len,u-th (d'ihe tibia"; only their last joint
black. Miihlle tarsi from the tij> of the lirst joint brownish, to-
wards the end blackish-brown, in paler specimens fi'enerally but
nnxleralely Itrownish. Hind tarsi generally entirely black, sonu;-
times paler towards the end of the lirst joint or also at tiie end
of the second joint ; in the palest specimens Itntwnisli only towards
the end. Ciliii of the teguhe yellowisli. Winji-s rather dis-
tinctly cdiiyish-yellow ; veins clayish-yellow ; the fourth htngitudi-
val vein not broken ; the costa near the tip of the lirst longitudi-
nal vein with a litth; swellinjj;.

Ildl). Washing'ton.^ (Osten-SacKcn.)

(tlixvrrnlion. — With regard to a female which may be tak<'ii
for that of the j)resent sjjeeies, the necessary remarks have been
made in the observation to the previous species. However un-
usual the inconstancy in the coloring of the tarsi of />. hdciiicniiiii
and of JJ. ruridOilix nniy be, 1 have no douljt that these varieties
do not represent dilVerent species. At least the most attentive ex-
amination of the specimens distinguished by the coloring of their
feet, did not lead to the discovery of the slightest tlilferenco in
the plastic characters in one as well as in the other species.

wM

^M

K

mm

wM,

wm^i '

■'rBm

pVk/. iH

sxm

^>'

s

Ml:

III

II

i',W

K

W^i

H :

^i

iir'K : , ,

m

\'':?!^ : '%^

n. Ciliii of the tcijuhr. hhich,

1. Fourth longitiKliih'il vt-in broken.

a. Aiiteiiiue black.

J4tt. 1>. raiiiif«*r LoKW. % aii'l 9. — Obscure virifli-aeneus, tlior.-icis
duiso iii;ii(;o-iiigro, facie albii, autenuis iiigris, ciliis ouuloruiu iiifcriorilius

'm

uni.TriioTMS.

r.:]

nlliiili!*, ti'pularum cillis iiij^ris, ixjililiUH tlaviH, nlnrum Vf>iii\ lonf.'ituiliiiali
<|ii:iilil n|i|it'ii<liu'uliitil.

]»aik liioiizi'-nrct'ii, iiippcr sidf of f 1m« tluuax liioiizc-tiliick ; faco white ; aii-
fciiii.'i' Mack ; i^llia of tin' lowi-r arliit whitish ; cilia of thti tciiula' yi'l-
lowisli ; tliu fourth hinuitiiilinal vein with a .stiiiii|> of u vciii. Lc^iig.
cor)). l). i:t. Long. nl. (Mil.

yvx. JJolicliiijiiis niiiii/'fr Li)i;\v, Ncuc Hcilr. Vlll, lH, 1(1.

Park l»rnii/.('-<fi'('i'ii, tlio iipiMT .'^iilc of the lliumx more linoizt'-
liliirL |''ac(* of (li(! (^ ticiii'ly IIS hrniid us llnit of the J, in Itutli
srxcs white. A iiteiniiP lilack ; llie lower corner of tlu* fii'st Joint
coiori'il isoinowliat iijuliler; in iIk; J* iIk; tliinl joint is railier joii';
elliptic with ti pointiMl ti|i, anil the i>|i))ari iitly han; arista inserteil
(|iiiti' near lln; lij); in tin; ? it is percept ilily shorter, mid lias a
k'ss ]toiiiteil tip, to wliicli llio iiristii is still iiioro approxiiii.iteil.
Kroiil hluish-black, very Iiriu-lit. ("iliii of the inferior orhil
whitish. Upper side of tlii; thora.v lii'oii/e-l)lii(dv, or iiiorc dark
l)roii/.c-};i;ri't'ii. Al)doinen soiiiewhaf coppery. Foro coxu' dark
yellow, at till) cxtreiiit' liasis somewhat lihickeiied, Itcsi't upon the
fore siilo with short iniiiiiti' lilaek hairs. Middle and hind coxsu
hiackisli, dark yellow only at the tip. Feet dark yelhiw; the fore
and iniddle tarsi from the tip of the second joint l)hiek ; the hind
tarsi, inidudiiif; the tip of tlie hinil tihiie, hhick. I'he hind femora
soniewliat hroad, before the end with a liristle. Cilia of the teji-iilie
Idack. AVin,!j,'s hyaliiie-ji-ray ; the fourth loiitritndiniil vein hroken,
so that its inferior aiig'le is a riji'ht one and the superior is rounded,
the former is sni)plied with a rather lont;; stump of a vein.

Jliilc. Lamelhe of the hyiiopycrinm white, rather small, round-
ish, at the upper and apical mar>;'in only with iiii extremely nar-
row dark border, on the latter Iiiit very little jiiL^ired and friiifi'ed
with black bristles. Jliiid femora very sparsely ciliated with
moderately loii«^ whitish-yellow hairs. Hind femora rather stout,
the ji'reater part of their hind side li'hibroiis. Costa with a small
tiwellinu; at the tip of the first loii<;'itudiiial vein.

J/(ih. Neliraska. (Dr. llaydeii.) Lake Wiiinipeir. (Keimicott.)
New llochelle, N. Y. (Osteii-Sackeii.)

h. Antennae yellowish-red.

24. D. Ilifractlis Loew. % and 9 • — Aeneo-viridis, thoracis dorso
poUino.so, opaco, alidoniine eupieo-niicante, facie alliida, iiiterdnni ex
tlavo cinerea, antennis rails, ciliis ociiloriini inl'erioril)US aliiidis, clliis
tegularum nigris, alarum vena longitudinali (iuarta. appendiculatil.

i ■'-• I

;!■ ■!

•■i;"'i''.i.

i

-.1

■■I;--

i, .

(

' 1 '

':,■■

1 .

■ 1 ; *

,.mS

54

DIPTEUA OF NORTH AMERICA.

[part II.

'i"

Bron/e-greeii ; uppor side of '.he thorax not very bright, tlull ; abdomen
with a coppeiy-reJ rellHctioii ; fauo whitish, sotiietiiiies riioro yellowish-
gray ; antenna) red ; cilia of the inferior orbit whitish ; cilia of the tegub'=;
black ; the fourth longitudinal vela with a stump of a vein. 1 jng.
Corp. 0.22. Long. ai. 0.17.

Sy.n. Dolirhopiis hifrnclas Loicw, Neue Beitr. VIII, 19, 17.

Uroiize-L'"! .'Oil, l)iit little sliiniii"''. Face wliitisli, in not rccciitlv
t'xcliuk'd spL'cinioiis fi-cnoriilly more yoUowisli-gray ; in tlic ^ il is
ii()'< mncii uaiTowoi' tliuii in the V. Antennie red; tlicif tliird
julnl ovate, soniewliat hroad ; at tlie point of insert i(jii of liie arista
it is somewhat swollen and blackened ; its apical half is lil'teii
brownish. Arista wiih a very short bnt distinct pnbeseence.
Front bronze-g'reen, but opaque, on account of a very delicate lig'lit
))ro\vnish-gray dust. Cilia of the ini'erior orbit whitish. Upon
the upi)er side of the thorax the ground c(»lor, altliouuh bronze-
o'reen, is (piite opa((ue, on account of a dens(^ l)ro\vnish-jiray ilust,
which in fresh, nut denuded siicciniens, alto,n'ctlier conceals it.
Abdonu'U lu'ifi'htcr metallic-green, in not recently excluded spc(,-i-
niens rather coppery. Coxa' and f"et yellow ; the middle coxio
ui> to the tip gray ; the front side (jf the lore coxie s|>arsely beset
with delicate nunute black hairs, glabrous towards the basis.
Hind femora before the tip with a bristh-. Foi'c tarsi itrownish,
only the last joints really black. Middle tarsi IVoni the tip of the
first joint blackish; the extreme tip of the hind tibia', including
the whole hind tarsi, l)lack. Cilia of the leguhe lilack. AVings
with a rather dark grayish tinge ; on the anterior margin and along
the veins generally somewhat brownish; the fourth longitudinal
vein broken twice at right angles ; l)oth angles sharp ; as an ex-
ception, the ui)per one sometimes slightly rounded; at the lower
tingle there is generally a stumi) of a vein, whilst the upper one
for the most part has none.

Mule. Lanu'lhe of the hy])opygium while, of modei-ate size,
rather rounded, on the upper ami apical margin narrowly Ixir-
dered with black, on the latter somewhat jagged and fringed with
black l»ristles. Fore tarsi 1j ti: 'cs the length of the tibia-; lirst
joint souH'what hmger thai; the second and third taken together;
fourth and fifth joints black, somewhat llatteiied, the u])])er edge
of the fifth bearded with close black hairs. Hind tibiic plain,
their hind side not glabrous.

Uab. Chicago. (Osten-Sacken.) Nebraska. (Dr. Ilayden.)

•4

DOLICIIOPUS,

55

25. I). Tittatlis LoEW. % . — Aoneo viriilis, tlioracis lineii media vit-
tisiiiu; lat«ralilni8 orichalceis, facie albida, anteiini.s nifis, cilii-s oeuloruiu
inff lioribiis allndis, tcgiilaniiii ciliis iiii^ris, peilibus llavis, tarsis maris
siiiiiilicihus, alarum vena loiigitudiiiali (jnarta t'lauta et appeudiculatii.

Broii/f green; middle line and the two lateral stripes of the thorax brassy
yi'llow ; face whitisli ; antennae red ; cilia of the inferior orhit wliitish ;
cilia of the tegulie black; teet yellow; tarsi of the % plain; fourth
longitudinal vein broken and furnished with a stump. Long. corp.
O.lii;— (1.127. Long. al. 11.2")— (i.:i().

Syn. JJolirhojiiis vittalus LoHW, Neue Ueitr. VIII, 20, 18.

iJroiizc jiTC'i'ii, sliiiiiiijr. Fiicc rntlicr broad for a J*, wliitish.
AiitciiiiiO ivd, apical half of the tliird joint soincwhat iiifiiscatcd ;
arista witli a short, distinct j'lihcscciicc. Front metallic o'rceii,
or ui'ccnisli-lihu', shinin.i;'. Cilia of the inferior orhit ycllowish-
whitc. rpjjcr side of the thorax green or hhie, with a consjiicu-
ons. almost golden-yellow or more copper-colored middle-line, and
with similar lateral stripes. Lanu'lhe of t!ie liyiiopyii'inm white,
of moderate size, mirrow-ovate in sha])e, with a narrow black
margin on the upper and the apical edge; the latter jagged and
fringed with hlack bristles. Coxa; and feet pale yellowish; iho
lore coxa' are beset on their anterior and inner si with numerous,
on the outer side with very scarce, small, Itlack hairs, besides the
white pubescence which clothes them; the middle coxa? upon tho
greater ])art of their outside blacUisli. Hind femoi'a before their
end with a bristle. Hind tibia' of the ordinary size, upon their
hind side with a glalirous stripe, which extends beyond their seciiud
third. Fore tarsi ])lain, only very little longer than the tibia', from
the middle of the third jnint lilack; the uiidille and hind tai'si are
lilack from the tip of the lirst joint. Wings grayi>h-hyaline,
towai'ds the fore margin xmi' vvhat nioi-e iii'own ; cosia iieiir tho
tip of the lirst longiludinal vein with a very thick swelling; fourth
longitudinal vein broken : superior angle of the tract ure rounded,
infei'ior one with onlv a short stomp.

JIab. Chicago; Gencssee, X. V. (0.-'tcu->Sackcn.)

'^' '

■ It
■(•

.1;

1^-

:: t-l

2<i. 1>. rJiprimis Wifd. % and 9 .— Aenco-viri.lij, thoracis lineii
media vittis(iue lateralil)us orichalceis, facie t>x tlavo albida, .■intcnin's
rntis. eiliis ocuilorum inferiorilius albidis, tegul.iruni ciliis uIltIs, jnHli-
Ims llavis, taisoriun anticoru.ii apice in mare dilaiato, alls basim versu.s
lion angustatis, vena longitudiuali (piarta fracta.

56

DIPTERA OF NOIITIE AMERICA.

[PAllT II.

Mp*.illic green, mirldle lino and lateral stripes of the thorax brassy yellow :
face yellowish-white ; antennaj red ; cilia of the inferior orbit whitish,
cilia of the teguhe black ; feet yellow ; tij) of the fore tarsi of the % en-
larged ; wings towards the base not narrowed ; fourth longitudinal vein
broken. Long. corp. U.^.") — 0.2(j. Long. al. 0.24.

Syn. Dolichoptis ciiprcuA Say, Journ. Ac. I'liilad. Ill, 8C, 9.

Dolivhopus ciiprinu-i Wirokmann, ZweiH. II, 230, 1. — Walker, List III,
CUO.— LoEW, Neue Beitr. VIII, 20, 19.

iMotallie grooii, sliiniiif^. Face whitisli, with a more or less ycl-
lowisli liiifiT', i)arti('iilarly tliat of the J", wliioli is considerably
narrower liian tliat, of the 9. Aiitennu! yellowish-red, the apieal
half of the third joint often infuseated. Arista with short l)iit
distinct pubescence. Front shininj?, bluish-green. Cilia of the
inferior orbit whitish-yellow. Ujjper side of the thorax green,
often bluish-green, seldom blue, with a consjjicuous yellow brass-
colored, sometimes copper-colored middle line and with similar
lateral stripes. Abdomen usually more bronze-green or coi)pery.
Coxa) and feet pale yellowish ; lore coxie only on the inner margin
of their anterior side with sparse minute black hairs, which are
more distinct in the 9 than in the J* ; michllc coxiu niton the
greater jtart of their outside, I)lackish. Ilind femora with a ))ris-
tle before the tip. Fore tarsi fi'om abo^it the middle of the third,
middle and hind ones from the tip of the first joint, bhu'keiied.
Cilia of the teguhe black, ^\'ings tinged with gray, towards the
fore nuirgin more grayish-brown, not more narrowed than usual
towards the base; the fourth longitudinal vein broken, so that its
inferior angle is a sharp right one and the sujierior is rounded;
the former is supplied with a short stump of a vein.

Male. Lamelhe of the hypopygium of moderate size and of
elongated-ovate form, white, narrowly bordered with black on the
njjper and apical margin ; the latter jagged and besot with black
bristles. Hind femora u]«in the second half of their under side
sparsely ciliated with very long yellowish hairs. Hind tibiio not
thickened, upon their hintl side with a glabrous stripe extending
beyond the middle. Fore tarsi not one and a half times the length
of the tibiie, two fir.st joints stalk-like ; first joint nearly one and a
half times the length of the second ; three last joints slightly fiat-
tened, third joint upon its upper side very densely fringed with
longer, the fourth with somewhat shorter black hairs ; the three

p

.vti-

[itf;,.!

DOLICIIOPUS.

0(

last joints of the tarsi aro about as lung as the second ; the two
last ones as long as the third.

Ilah. Middle States. (Osten-Sacken.) Xebraska. (Dr. Haydcn.)
O/iscrrd/ioii. — The determination of this species, tlie most
common in the ^Middle States, is not doubtful when we compiiro
the descriptions of Saij and Wicdcniann, which servo to complete
each other. Tlio 9 is easily distinguished from that of />. loin/i-
jicnnix by its less narrowed basis of tlie wings. Jts distinction
from the as yet unknown 9 of />. ri/lalus must be very dillicult,
unless perhajK lli< )»ro]>ortional length of their feet affords an avail-
able nuirk ot' (lisli on. Two males measuring only (\.'2'.\ in
length resendjie in aii plastic characters the ^ of i). ciiin-inns so
much that I take them merely for asmallervariety. A single, un-
fortunately not well-preserved ^, distinguished by a somewhat
larger size, may jx'rhaps constitute a piii'licular species, as the
fourth longitudinal vein is less broken, and the three last joints uf
the fore tarsi are a little broader. It would not be safe, however,
to decide upon a single speciuicii.

21. D. Ioiisil»eiiiiis LoEw. % ami 9 •—-^t'lu^r.-viridis, thoracis linei
media vittistjue latcralihus oriclialceis plenniiiiue suliobsoletis, facie ex
flavo albiilfi. anteiniis riifis. ciliis ocuhirum iiifiTiorihus all)i(lis, ti'irularum
ciliis nigiis, jR-ilibus tlavis, maris taisorum aiitiuoium apite dilatato et
alls basim versus valde angustati.s.

Metallic green ; midiUe linn and lateral stripps of the thorax of a hrassy-
yellow color, howivt'r, mostly indistinct; face yellowish-white; ant(?n-
II re red ; cilia of the inferior cvliit whitish; cilia of tht; tegulro hlack ;
feet yellow ; the tip of the fore r.si of the male enlarged and its wing.s
very much narrowed towards the basis. Long. corp. (.'.-iJ. Long. al.
0.2i;— (I.-.27.

Syx. fJiilii liopn.<: loiijlpeniiia Loew, Neue Bcitr. VllI, 21, 20.

J}ronze green, shining. Face white, often more or less yellow-
ish. Antenme red. the second half of the third joint sometime.^
infuscated. Arista with'a rather >hort but very distiiu't ]ndicscchce.
Front shining, green or Idnc. Cilia of the iurccinr (U'bit wliitisii-
yellow. rppcr side oj' tiic ilioriix with a brass-cnhircil middle lino
and similar latcrnl striix-^. w-hich, howrver. are less distinct than
in the two previous specif'*. Alxlomen often very coppery, ])iir-
ticuhii'ly upon its posterior Iin-l'f. ("oxic and feet ))ide yellowish;
fore co.\iu ouij w*i tlio iiwurr luaryiu of their anterior side witli a

^ .

' •! ;■

.-i' t

I

V 1

It .^t

58

Dll'TKIlA OF NOllTII AMKIIICA.

[

PART ir.

few indistint't iniiiute black hairs ; iiiiddlo coxa! u]k)ii llic jiTCiitor
part (jf llit'ir oiitsido ^'ravish. Hind Iciiiora Ix'f'orc llic tij) wiili a
hrisllc. Fore tarsi Ijlacivened fi'din tiie iiu<ldle of tlie tliii'd joint ;
middle and hind tarsi inluscated from the lip «)f the lirst joint,
and towards their end gradually (-(dored with hlack. 'rciiuhc
with hhick cilia. AVings tinged with gray, towards the lore mar-
gin more yellowish-l)rown, towards the hasis narrower than in the
relaxed species; the fourth longitudinal vein not s(» nuu'li broken
as in the two i)revious .s))ecies, the lower angle of the fracture
genei'ally without stump, yet sonietinu's with a very short one.

Male. — Lamelhe of the hy]>opyginm of moderate size iuid of sin
elongated ovate form, on the upper an<l apical margin i)or(lered
vith black ; the latter one vei'y much jagged and fringed with
black bristles. Iliml femora not ciliated. Jlind tibiie not thick-
ened, l.airy upon their entire hind side. Fore tarsi somewhat
longer than the tibise ; two lirst joints stalk-like, the first hardly
one and a (pnirter the length of the second ; the three last joints
taken together hardly long»-r than half the second joint, but very
little llatteiH'd, tinged witii lilack beyond the middle of the third
joint; the third joint UijiMm its upper i^'.X'^ii densely fringed with

niii's o

still tl

f

u'lr

longer, the fourth with -omewhat shorter, black hairs.

a renmrkalile length, unusually narrow near the basis

rounded amd angle pri' <i'ting abnost in the shape of a lobe ; the

costa mar the tip of thie lirst longitudinal vein with a but slight

swelling.

JInb. Middle States; Washington, I). C. (al)undant in June;
Osten-Sacken) ; Chicago (i'i.).

i)h^vrv(itii)u. — I am in {Mjssession of a 9 which was eommuni-
eated to me as that of the ])resent species, l)ut which I consider
as that of 1>. srrijiKldri.-!. .\s />. IniKjijxiiiii.-^ sometinu's ociiirs
■without distinct fracture on the fourth longitudinal vein,

it

happens, on the ('(uitrary, that in some specimens of 7>. sccijuihin's
the fourth longitndimd vein is sonu'what broken; they are how-
ever easily distinguished from J). l<iii'/i/i('iiiii,-< l)y the pale color-
ing of their humeral callosities. The latter differs l)esides from
the females of all related species by its wings, which are somewhat
Harrowed at the basis.

DOLICHOPUS.
2. Fourth longitudinal vein not broken.

69

a. Antennso red, at the utmost tlu; third joint at the tip or almost

entirely black.

a. Humeral callosities of the same color with the thorax.

2S. 1). liastatllH, nov. sp. % and V- — Viridis, antennis rufis, arti-
ciilo tt'itio ex parte nigro, ciliis oculorum int'ei'ioribus tliivis, ti'guliiruui
ciliis iiigrirt, pedibus tlavis, tibiis intermediis mai'is ante apicciii per-
spicue, fccniinte obsoletissinie albido-notatis, tarsis intciinedils maris
aiiii'cni versus coiiipressis, fijcmime subcoinpressis, alarum venil longi-
tudinal! (juarta non t'ractd.

Green; antennie red ; third joint partly black ; cilia of the inferiol- oibit
yellow, cilia of the teguho black '. feet yellow ; middle tiliiie before the
tip with a white spot, which is ve!\v distinct in the X, , and indistinct
in the f ; middle tarsi strongly llatteneil towards the tip in the 'J, , and
more slightly in the J ; fourth longitudinal vein not broken. Long.
Corp. 0.22. Long. al. 0.22— U.2;5.

Tliis si)0('ic's, (listiiij^'uislit'd by many ])cc'iiliar niiirks, rosoiiiblcs
in tlio structure of tlie J* arista J>. ,<(if/illar/t(,H lioew, from Siljo-
ria. l>roiizo-grei'ii, shining. Face of the J* narrow and Iirassy-
vcllow ; tlio face of the 9 is luiu'li broader, and has a •'•ravish-yol-
low lingo. ral]»i yellow, in tlie 9 towards the basis blackish.
Aiiteiuiio re(blish-yel](»w ; their tliird joint short and rather
rounded ; its apical half black or Ijrown ; the arista of the 9 i.s
plain and rather stout; that of the (^ is longer and more slender,
enlarged at the tip into the .shape of a lancet-like lamel pointed on
both sides, the tip of which lias a dingy-whitisli colnring. Fi'DUt
shining ])luish-greeii. Cilia of the inferior orbit yelhtw. Fore
coxie yellow, upon the anterior side with a delicate black ]ud)es-
cence. Middle and hind (•().\je grayish-))lack, only the extreme
tij) and the trochanter yellow. Feet yellow. Hind fVnu)ra IjcCore
the tip with u bristle. Middle tibiic with black tij), and l)efore it,
in the ^, upon the ujjper side with a whitish spot, of which there
is hardly a trace in the 9. lliml tibiieat the tip ]»lackish-br()wn,
in the J* upon the hind side with a narrow, linear, hardly distinct
glabrous stripe. The tarsi have the tip of the first joint, the lour
following joints, and lie.sides, the base of the first joint of the mid-
dle tarsi, ))lack ; the three last joints of the middle tarsi of the J*
are distinctly, although not very strongly, flattened; this is also
the case in the 9, l)nt less perceptibly so; this part of the
middle tarsi viewed from the side seems distiuetly stouter tliau

■■<■:

; ^ la.

.1 ■■.•'!•;■

if'., t A

.!<.

.';- .1 ;

'11^. •;

»h:^

h

CO

DIPTEUA OP NOHTII AMKllIPA.

[I'AUT II.

Slf•.»'^'.^.,/ ,

wlicii it is seen from alxivo or holow. Tiio first joint of tliu liiiid
tarsi wilii only two tliorii-lilio brislics. Cilia of tlio tcji'iihu l)lack.
AViiiU's ji'rayisli-liyaliiii' ; tlio last sc.uiiiciit of the i'ourtli ioiijiiliidiiial
vein is iiilk'ctrd hclbrc its niiddlo hut not broken. Tlic wind's of
tilt' J* art' sonicwliat narrower than tlioso of the 9, and liave he-
foi'(^ tilt' anal anji'lu a very rtniarkalilo lar^'t' hisiiiiiah'd cxcisinn,
so that the an.ii'Ic assiinu'S tlit' sliapt' of an indc|»c'iid('iil lolH;-like
aitpciidiiL'e. Laiiiclhu of tlio iiypopy.a'iiiin of iiiodcrato size,
roiindtd-ovatc, whilish, with a rather broad black border, on liio
uj)]»er and apical niariiin jaji'ued anil I'riiiji'ed with black liristles.
Jhb. Sitka. (Sahlljerj--.)

29. 1>. Iilmitipos Scop. % and '^. — Viridis, liunicris rmicoloiibus,
anteiiiiis riilis, articiilo tertio prajtur basiiii nigro, f'ai;i(( auica, uiliis (icu-
lorum iiil'(!ii()ril)iis llavis, tegularum ciliis iiigris, pedibus llavis, artidulo
tarsoruin iiitfriiicilidiuiii piiino maris sutulis iiigris jwiiuato, alarum
Vena, lougitudinali ijuarta non fra(;ta,.

Green, including the huiiieral callosity ; third joint of the red antennre
with the exception of its basis, bl.uek ; face golden-yellow ; cilia of tlia
inferior orbit yellow ; cilia of the tegnla; black ; fetit yellow ; lirst joint
of the middle taisi of tlui 'J, fcatiicred with black bii.stles ; fourth lon-
gitudinal vein not brcdceii. Long. corp. 0.17— U.lJ. Long. al. (.1.18.

Sys. Miiiird jihuiiijxs Sroi'01,1, Ent. Carn. olU, Si),').

Dclir/nijnts jii iiiiitarsi.i, Fai.i.kn, Doliidi. 11, !(!. — MKUiEN, Zweifl, IV,

i)(i, 21). — Machuakt, Suites, I, 440, 34.— Stanmi's, Isis, Is.'U, <;:i, 14.

Zhttkustkdt, Ins. Lapp., 7U!), 9. — Stakokk, Kroyer's Tidsskr. 30,

21. — Zkttkustkdt, Dipt. Scand. II, 541, 3,">.
DoUchoims i>lHmi]>cs Wai.kkk, Dipt. Brit. I, 1(12, IG.

]\rotallic-o'rcen, soniotinu's somewhat co]ipt'ry. Antonna3 yel-
lowish-red, third joint, exccptins: its basis, I)lackened ; that of tlio
J* ovate, with a rather sliar}) anjz'lo at the end ; that of the 9
sliorter. Front metallio-g-reen. The face reaches hnver here than
in most other species of DoUchopus ; that of the ^ is rather nar-
row and irolden-yellowisli ; that of the 9 is broad and palc-graj'-
ish, dusted witli whitish-yellow. J'alpi yellow. Cilia of the in-
ferior orl)it yellow. Fore coxie yellow, Avitli a black i)ubef cence
anteriorly ; middle and hind coxic blackish, the extreme tip ami
the trochanter yellow. Feet yellow. Ilind femora with a bristle
before the tip. The middle tibia; are but slip'litly infuscated near
tho tip ; the tip of the hind tibiie is somewhat blackish, this color
occupying but a narrow extent. Fore and hind tibiic plain in

i'i;,i

\\ I II P^pi^,n" ,

DOLICIIOPUS.

61

both soxcs ; the middle tlbiiu only in the 9 ; in the J* thoy arc
roniarkiiltly slondor, only sdiiiowhat stouter at the liasis and near
the tip; on the upijor side with a hhieliisii-hrown ionfiitudinal
line, which reaches IVoni the incrassation at the base to that at tlio
tip; they show besides, just before the apical incrassation, a small
whitish, not always distinct, crossljand. Fore and hind tarsi plain
in both sexes ; the tbrnn'r from liie ti}) of the first joint, the latter
altof^'cther, black; middle tarsi also altoji'ether l)lack, phun in the
9 ; tlieir first joint in the J* is sonnnvliat incrassated and densely
ciliated on both sides with oldicpiely inserted Idack bristles, (.'ilia
of the teji'ula; black. "Wings fi'rayish-hyaline ; fonrth longitudinal
vein not broken ; in the 9 they have the usual shape; in tlie J*
the hind nnirgin has a sinnated excision before the anal anii-je.
The yellowish-white lameihe of tin.' hypopyginni are of niodcratu
size, elongated-ovate, narrowly borderetl wilh black, fring(.'d with
black bristles along the upper and apical edge ; the latter is some-
what jagged.

Jlatj. Sitka. (Sahlberg.)

()l).-<i'rrafi(in. — I have i)een able to compare n considerable num-
ber of North American specimens of this species, and (hi not find
any diflerence between them and the Kurope; n ones. At lirst it
appeared to me that the arista of the former ones was percept il)ly
stouter than that of the latter. A more close examination showed,
however, that this dilferencc was merely illusory and produced by
some dust oii the American specimens in my i»ossi'ssioii. The
api>endages of the hy))opygiuni of the North American specimen!*
arc likewise precisely similar to tlu.se of the European ones.

'W^

.1 ■ •

30. D. flllvipes LoEW. %. — Viridis, nitidns, faoie anrca, .nntonnis
fulvis, aiticiilo tertio piv-eter basim nigro, ciliis oculoruiii iiifcrioiibiis
tlavis, tegularum ciliis iiigris, coxis antici.s pedibnsque fulvis ; tibiarum
intermetliaruin apice albo ; tarsis intermediis slmpliclburi.

Green, shining ; face golden-yellow ; antenii;c dark yeilow, third joint, ex-
cept its basis, black ; cilia of the inferior orbit yellow ; cilia of the tegulte
black; fore coxte and feet dark yellow, tip of the niidille tibiie wliite ;
middle tarsi plain. Long. corp. 0.23. Long. al. ti.li-i.

Stn. Dolichopus fulvipes Loew, Berl. Ent. Zeit. VI, 512, (Jl.

^letallic-green, shining. Face golden-yellow, rather narrow.
Antenine saturate dark yellow; third joint elliptical, not rounded
at tip, black, with yellow basis. Front metallic-green. Cilia of

m-

1 1 ' '

!r" .:(•

*^

',.■ 'i'-*

tm

"WT"

C2

PII'TEIIA OF NORTH AMEUICA.

[I'AUT II.

tlio inferior orbit yellow. Lniiielhe of the hypopyf^ium rather
><iiiiill, oviite, whitish, with a narrow ))la(k lionler, jafffred at the
tip and with Idaek bristles round the edji-e. Tore eoxie saturate
dark yellow, with black hairs ; {he four posterior eoxu; Itlackish
with a (lark yellow tip ; the rather stout feet also dark yellow;
jiiud I'eniora with a I)ristle before the tip; the middle tilda- have
at the tip, on the upi»er side, a whitish, distiuetly swollen sjiot,
whieh is l»are of any hairs or bristles; upper side of the hind til)iii3
with numerous l)ristles ; there is no g-labrous si)ot on their hind
side. Tarsi jtlain ; the four anterior ones are blackened from
the ti]) of the lirst joint ; the base of the second, sonu'tinies also of
the thirtl joint, renmin however pale; the hind tarsi are altoi;'ether
black. Cilia of the teji'ula; black. ^Vill;i•s u'rayish-hyaliue, with
a wide sinus on the hind nuira-in, I»efore the anal anji'le ; costft
hardly thickened near the tip of the lirst loniritudinal vein ; the
last portion of the fourth lonji'itudiual vein considerably inflected
about tlie middle, without bein;.i' bi-okeu.

JIdb. Jlliuois. (Le Baron. ) White Mountains, X. II. (Ostcn-
Sacken.)

31. D. sexai'lifUlatlls, n. sp. %. — Anreo-viridis, nitidns, nnten-
uiri iiitis, ciliis oouloruiii inf'eriorilnis tlavicantilms, ciliis tcgiil;iriiiu
nigris, coxis (uunilnis pedibusque llavis, tar-iis posteriori tms iiidc ab
articuli i)riini npiee ex I'usuo nigris, alarum vuiia longiludinali (juartfl,
non fractii.

^. IlypojiVLrii apit'e tlavo, lamellis albis late nigro-linibatis, tarsoruni an-
ticorum articulis tril)n.s priiiiis eloiiaatis, llavis, articiilis ultiiuis iluobus
brevibus couipressis, pa'imltinio toto atro, ultimo in basi atro, in aiiit-e
nivt'o et appendicuhl laiuellitbriui, cum artiuulo ipso concolore, iiistruuto.

Gold-groen, sliining; antennne i-ed, cilia of the inferior orbit yellowish, on
the tegubr black; all eoxie and feet yellow, the middle an<l hind tarsi
from the tip of the first joint brownish-black; the fourth longitudinal
vein not broken.

^ . Tip of the hyjiopygium yellow, lamell.T white with a broad black
border; the three first joints of the fore tarsi elongated, yellow, the two
last ones short and broadly flattened : the penultimate entirely black ;
the last one black at the basis, snow-white at the tip, provided with a
lamelliform appendage of the same color with this joint.

5 Long. corp. U.ii2. Long. al. 0.22.

Golden-jjrcen, rather shiinnj^, still the thorax rather distinctly
dusted with ochrt yellow; front steel-blue; scutellum greenish-

i;4

'if

cl

roMPiroiM's.

C3

blue. Antcniirc ycllowisli-rcMl, the short tliird joint TiKtro brnwii-
isli-rt'd. Tlie narrow fiico oclirc-ycllow. Ciliii of tlic int'rrioi*
orltit pale yellowish. Ciliu of tlic tcfriila' l)Ia('l<. IFyponyii'lnni
of UHxh'ratf size, the liasal liiilf nictallic-^iTccn or fi-rccn-hhii', tlio
apiraliialf yellow ; the liiinelliu rather larjjfe and Iji'oad, with a
rather broad l)hu'k border, frinjfed with black on the n|i]ier niar-
jrin only ; jajxfred as nsnal, on the apical niarfrin and beset with
crooked ])lack Itristles. Fore coxte entirely yellow, with a delicato
and short pnbescenee ; near the tip with black l)ristles. Middle
and iiind coxie of the same color, still the former more (»r less
blackish at the basis. Femora and tibiiu yellow; hind femora
upon the front side before the ti|) with a stout ))ristle ; all femora
friabrons upon their underside. Fore and middle tibin} plain,
rather slender, moderately bristled. Hind tibisu very stout,
thickened upon the basal half and with a hnye frlabrous spot
iil)ou their himl side. Fore tarsi slender and nearly twice as loiifj
as the tibia'; the clonfi'atcd, but ]»laiii, three first joints yellow, of
uiuch dccrcasiufr length, the fourth joint deep Idaek, short, linVidly
flattened, trian^-idar ; the fifth joint of the same shape, hardly some-
what lonijer than the fourth, deep black at the basis, snow-white
at the broad tip; the unijnes, ])nlvilli and em])odium inserted at
its lower end are of the ordinary structure ; at the upper end there
is a distinct ellijitical lanud. which, like the joint itself, is deep
black at the basis, and snow-white at the ti]). "Wings grayish-
hyaline, rather narrow towards the basis; near the tip of the first
longitudinal vein there is l>ut a slight trace of a swelling of the
costa ; the latter, ln)wever, is rather stout from this ])oiiit to the
tip of the wing; the last segment of the fourth longitudinal vein
is only moderately inflected ujjon its middle.
Hub. District Columbia. (Osteu-Sacken.)

4

32. D. nificorilis Lokw. %. — Viridis, humcris ooucoloritins, fmten-
iiis rulis, ooulorinii ciliis iiiferiorilms aH>is, tegnlai'Uiu ciliis uigris, ]hhH-
liiis flavis, articuilo tarsoruiu antii.'oruni ultimo dilatato, alaruiu veiii
longitudinali quarta, non fracta.

Green, includinc tlie humeral callosities ; antenna' red ; eilia of the inferior
orbit white ; cilia of the tefjul/e black ; feet yellow ; last joint of the fore
tarsi enlarged ; fourth longitudinal vein not broken. Long. corp. (M9.
Long. al. 0.18.

Syn. Dolichopus ruJicoDlis LoEW, Neue Beitr. VIII, 21, 21.

:^k-

^f

i,

; 1

■•■i.N

64

IiLl'TKIlV OF N<»ItTtI AiMlilUCA.

[I'Altr II.

(Jrccii, nitlicr ^liinintr. Anti'iiliu! red ; third ii»iiit sDiiicwluit
loti'-'cr tliiiii lilt' two lii'st liikfii tiiu'ctluT, 1)1' nitlicr ('(iiiiil Itrc^idlli;
ai'istii distinctly pnlicsci'iil. Frcmt l)fiji'lil bliii-ii-jiTi-cii. Ciliii
of llio inl'frior orltil wliilisli. Iliiincri of ilic mimic c(dnr as tlio
rciiiuiiidcr (if llic iiiipcr siirl'iicc ^\\' the llinnix. I'lipci' side ul' tliu
idtdiimcii more ;j;oldcii urccii ; tlic whitlsli iiiilM'srciicc dii its sides
<>(cii|d<'S inure s]iiiee tlinil lisliiil. I-iiliiellie lA' the li_viHi|»yj:'iniii (if
tlie (irdiiiiiry size tiiid iMthei' niiinded in sh;i|»e, white, uilh ii nitlier
liiirniw hliick liDi'der idmiji' the iiiiper tiiid iipicid edjre ; the hitlrf
jii'j'iicd and IVintred with lihi<'k l»rislles. ('i).\;e mid feet jKile yel-
lowish ; iinteri'ir side (if llie lore eoxie oidy Milh u vei'v deliciilo
wiiitish inil>eseeiiee ; middle (•(•xiewilh si hhiekish situt on iheii'
Diitside. Jlind feiiioni with a bristle helore the tip nnd spiirsely
ciliiited \\\\\i lonu' yellowish-white hiiir- on the latter half of their
under side. Jlliid til)iio of ordinary thickness, on llieir hind side
only with a very short g'Inhroiis striiie near the basis. I'orc ti'.rsi
more than once and a half the lenjith ol • tibia', slender ; li'.e four
first joints stalk-like, yellowish ; the two lirst joints, taken together,
are somewhat lon,L;er than the tibia ; the joints diniinishiii;:' in
len<j,'lli and stoiitness from the first to \]w third; the fourth joint
is e(|ual to abont one-third of the lenutli of the third and i; only
sliji'htly stouter than the latter; the lillh joint is black, as Ihum- jis
the Ibiirth, somewhat flattened and bearded on its upper side witli
douse, somewhat iiicnmlieiil, short, bjjick hairs. Winu's rather
yellowish-ji'ray, somewhat narrowed near the basis; the fourth
loiiuMludinal vein not Iirokeii ; costa only slightly Ihiekeiied at the
tip of the first lonuitndinal vein.

Jtah. Middle Slates. (Oslen-Sackeii.)

Ob!<i')'rnlion. — If in (letcrnuninu' a female speeinuMi, this si)0('lcs
is hit upou, and if its winus, instead of beinji' yellowish jiray, ai'c
distinctly ii'ray, then it will be necessary to compare wlail has
beou said about such females iu the observation to the twenty-
first species.

6. Humeral callosity yellowish.

33. n. HCapillai'ia Loew. % ami 9.-— Viriilis, humeris flavis, facie
albida, antennis rufis, ocnloruiii ciliis iutcriorilius albidis, ciliis tegula-
rura iiigris, pedibus flavis, tarsis maris siinplieibus, alarum venil longi-
tudinali quartd, uon fracta,.

Green with yellowish humeri ; face wiiitish ; autenn.i? red ; cilia of the

^ii

\'K

DoLirii(»rta.

05

t.*;

Jnfuridr orl>it whitiHli ; clliu f tin- tt-^'ul.T Mack ; fcot ynll(iw ; larni of
tlitt }) |>liiin; foiirtli longitiiiliiiiil vein not broken. Lutig. curp. O.'iO—
o.'Jt;. J.ong. 111. O.a.l— (i.2t).

FvN. iJnlirliopiia srnjiitliiris LoEW, Neun Ht'itr. VIII, 'JiJ, 22.

IJrij^lit-jrn'cii (ir bluish-;: iimmi, tlic alHliiincii iikM'i' piM<'U-ur('»'ii,
t'spi'ciuU}' towards its tip, sninctinics niflicrcopiicry. Kikt wliitisli.
ill tliL' (^ jrt'iicrally sitmcwliat yellow isli upon the ii(i]M'r linif.
Fi'oiit ;4iiiiiii>r, ffciicrally Itliiisli-jrrt'cii, seldom frreen or hliic
Aiilciiiiii' ye!lo\visli-red ; lliini Joint sliort-<tvale ; ^ciienilly >liti-litiy
iiiruseated nt tlit; tip; arista distinctly pulteseent. Cilia ot tlie
inferior orhit yellowish-white, llnnieral callosity yellowish. The
callosity hetweeii the root of the winjr and the scutellmii and
oenerally also the iiiaiyin of the latter are of the same color.
Co.Xii; and feet )»ale yellowish ; the front side of the fore coxa- is
liesot with delicate whitish hairs; there are some short niinnto
Itlack hairs on their inner side only, which however are not always
easily (lisceriiil)le in the ^. Middle c((.\ie upon ilieir ontside with
an elon|iiited Idackish spot. Hind femora witli a liristle iicfore
the ti)). The two last Joints of the fore tarsi of the ? are hlack-
ish-l)i"owii, still the brown color often liejxiiis already liefore the ti]»
of th(! third Joint and the tips of the lirst and second Joints are
also (tften somewhat infiiscated ; in jiale-colored specimens the
■foloriiif; of the middle and hind tarsi is the same, whilst in darker
ones the distinct lirowii color heuins already fii the middle of the
first Joint, ("ilia of the tejiuhe black. Wintrs frrayish, towards
the fore mai'frin somewhat yellowish-lirown ; fourth loinritndinal
vein not broken, still the inferior anjrle of the flexure is some-
limes not rounded.

Mnlc. Lamellit' of the liypojjyfrimn of moderate size, rather
rounded, on the ujtper and ajdcal mar^nn with a rather broad l)lack
border, on the latter Jairjred and frinured with black bristles. Hind
femora njion the second half of their under side ciliated with
moderately lon^ yellowish hairs. Hind tibia> of the usual thick-
ness, upon the hind side with a jrlabrous strijie, which reaches
nearly to their mi(Ulle. Fore tarsi somewhat over once and a quarter
the length of the tibiii;, their joints decreasiufi- in length, the last
one somowliat more pale at the tip. Costa near the ti]) of the
first lonjritudinal vein w'lh a very slight swelling.

Hah. — Middle States; I)istri<-t Columbia (in June; Osteu-
Sacken); Illinois.

•

-.t:

''

''.! ■

l! 1

n

lA I

V'W V

66

MI'TKllA of NdllTH AMK.IHr.i.

[I'AllT If.

i| 'I'"

^1'

■Kl

31. D. flinditor Lokw. % nixl 9. Viridir^, linmi>i-i!4 fltiviM, f.KMM
nlliiila, aiiti-niiiti mils, ciliiH (iciiloriitii iiit'4'rioriliiis alliiilis, tri(iilanitn
ciliin niiiris, |)iMlilius tl.ivJH, tarHorniii aiitii'nniin ailiiiiliH iliiolms iiltimig
ill iiiaru ililatatis, nlariiiii veiiil lon^'ituilinali quartd iion Iruutil.

(irt'tin, witli yellowish limncri ; faiM> whitish ; niit«Miii(B n"\ ; cilia of th«
iiifcrinr oi'liit, wliitish ; iMJia of tli« tfuula' Mack ; IVi-t yi'llcnv, tliti twi>
last joints of the fore tarsi of tlm ^ t-iilar^cd ; fourth loiigitutliiuil veiu
not hrokon. Long. lorp. (l.2'i. Loiii{. al. i).2'i.

Syn. />ii/lrliojiiis /iiiK/ilur LoEW, Neue lU-itr. VIII, 22, 23.

IJri^lil jrrccii (ir hliic-^rccn, the !iIh|(»iii('Ii more jroldcn-jiTccii,
especially townnls its end, soim'tiiiics nit her cn|t|iery. Fiice
whitisli, in the ^ frcncriilly s(»ni<'\vhat ycllowisii upon tiic iippci'
hair. Fr<»iit shiniiijr, generally Idnc-^iTccn, seldom blue or jireen.
AiitehMii' yellowisii-red ; third Joint short-ovate, jiciierally slijihtly
inl'iisealed at tlie tip; arista witli a distinct |)iil)eseenee. ("ilia ol
the iid'erior orl>it yellowisii-white. ilinnera! caHosity yellowisli.
Tlie oullosity l)t't\veen tlie root of the winji; and tlio scntelluni is
usually of the same vuUn' and ^-enerally also tlio iiuiririn of the
latter. Coxie and feet ]»ale yellowish ; the front side uf tlie foro
coxiL' beset with de!i<'ale white hairs; on their inner side there
are also some short black hairs, which liowevor arc md always
distinct in the ^. Middle eoxu' with an elonpitcd blackish spot
uixni their oufsi(h>. Hind femora with u bristle before the tip;
two last joints of the fore tarsi black-brown in the 9, still this
brown color often bejrins before the tip of the third joint and the
tip of the lirst ami second joint also are nsnally sonn'what infns-
tated ; pale colored specimens have the same eolorino^ on the
middle and hind tarsi, whilst in darker specimens a distiinit infus-
catioii already bejrins in the middle of the lirst joint. Win<rs
frrayish, somewhat more yellowish-brown towards the fore marjiin ;
fourth long'itudinal vein not broken.

Mdli'. Lainelhe of the hyi)oi»y<riuiu of medium size, rather
rounded, white, on the upper ami apieal nuiri>'in with a narrow black
border, on the latter ja^''<red and frinjred with blaek bristles. Hind
femora ui)on the second half of the under side ciliated with not
very lonjz; yellowish hairs. Hind tibia; somewhat more slender
than in the J* of the ])revious species, uixui their hind side with
a jrlabrous strijie extendiiifr beyond their middle. Fore tarsi once
and a quarter the leng:th of the tibiie ; the three first joints of
moderate size and of deereasiiig lenjrth ; fourth joint flattened,

iJi';

DOMrnniMS.

6t

black, oil its upper fil^ic IVinjird with cldsc Ithu'k hairs; (he fifth
joint still iiiuro lliiltnifd, ovale, siiow-wliite, upon its ii|»per >ii|e
with very short anil line niinnte snnw-wliite liiiirs. 'I'lie eostu nt,
the tip of thu lirst loiif(itiiilinuI vein only with an insi^nilieaiiL
swelliiif?

llnh. Middle States. (Osten-Sacken.)

Oliacrrd/ittti. — Of this and of the preeedinir species I ))ossesH
80 many sjteciineiis taken together that I can entertain no dntiltt
about haviii;^ the 9 <'f both before inc. riifortiinately I found it.
impossible as yet to discover any reliable character to (listiiiiiiii>!i
these females.

h. Anteiinnj black, nt the utmogt the greater part of thn (Irst joint n»il.

35« D. rlirysostoillllH Lokw. %. — Viriilis, f.-icit' niin-il, .■nitciniis
liigris, ciliis oculoiuiii iiil'eriorilins alliidis, tcgularuia eiliis nigtis, \>i'i[\-
\)\1A thivlH, tnrsis iiiarLs siiuplicibus.

Green; face golden-yellow; niitfim.'p M.ock ; cilia of the iiifciior oiliit
wliitisli ; cilia of the tegul.-e lilack ; ftu-t ydlcpw ; tarsi of the J, jplaiii.
Long. Corp. ('.18. Long. al. 0.17.

Sy.v. JJulichii/ius ckrysimOiiniis LoKW, Nene Beitr. VIII, 23, li4.

(ircon, .shininfr. Face narrow, dark udldcii yellow. Antenna!
altofrether black; third joint cloiifrated-ovate with a pointed tip;
arista rather slender with a somewhat iiii])erceptii»le piii)escence.
Front shining blue-green, ('ilia of the inferior orbit whitish.
Upper side of the tliora.x l)ut little dusted ; on ciicli side, at the
transverse suture, with a co))pcry-browii spot. Abdomen with
rather apparent dark incisures, which, in fully colored specimens,
nre margined with co])pery-red. The lamella- of the liypnpygiiim
are large, rounded, yellowish-white, with a not very narrow black
1)order on the upper and the {ijtical edges; the hitter is jagged
and fringed with black l)ristles. Fore coxai yellow, somewhat
blackened only at the base, clothed anteriorly with sliort black
hairs, middle and hind coxie blackish, their extreme tip oidy yel-
low. Feet yellow. The hind femora with a bristle befure the tip
and with short yellowish hairs on the underside, iiltlumgh not
ciliated with them in the true sense of the word. Hind tibia' not
stout; their posterior side without glabrous stripe. Fore tarsi
plain, but little longer than the tibiic, gradually iiifuscated towards
the tip. Middle and hind tarsi infuscatcd from the ti]> of the first
joint; however the second and third joints of the middle and the

1?

itt

47- -

<' . s

I

63

DIPTERA OF NORTH AMERICA.

[part II.

soooncl joint of the hind tarsi, except its tip, are still rather pale.
'I'ef^uho with blaek cilia. AViiijis tiiiLfcd with }j;ray ; more brown*
ish-jrray along the anterior bonier; costa with a hardly perceptible
thickeidng at the tip of the first longitudinal vein ; fourth longi-
tudinal vein not broken.

Hub. Washington, 1), C. (Ostcn-Sacken.)

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pf<i

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ffila

isi>'-i

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ii

36. D. prSCllstllS LoKW. % . — Aeiieo-viridis, iiiten?, facie ex ciiierco
ochraci'il, anteiini.s iiigris, ciliia oculoniin iiiferioribus alhidis, tcgiiliirum
ciliis nigris, pedibus testacei.s, litura, feiuorum aiiterioiuiii, feiuoium
posticoi'um apice, tarsis anterioribus iiide ab artiuuli prinii apice, tarsia
posticis totia cum tibiaruiu posticaruui apice nigris, alarum ex ciiiere*
]iyalinarum apice uigro.

Bronze-green, sliiniiig ; fate grayish oclire-yellow ; antennae black; cilia
of the inferior orbit whitish ; cilia of the teguhv l)lack ; feet luteous*
yellowish ; a stripe on the fore-femora, the tip of the liind femora, th«
four anterior tarsi from the tip of the first joint, and the hind tarsi
altogetbor, as well as the tip of the hind tibiae, black; the tip of the
grayish-hyaline wings black. Long. corp. 0.21. Long. al. 0.21.

SvN. Dolicliopus ])ricustus Loew, Berl. Kut. Zeitschr. VI, 212, 62.

Bronze-green, shining. Face grayish-yellow. Antennic alto-
gether black; their third joint shor^ Front metallic green, some-
what dusted and therefore but little shining. Occipital bristles
very long. Cilia of the inferior orbit whitish. Last segments of
the abdomen generally somewhat colored with coppery. LamelliE
of the hypopygium of medium size only, broad, with very rounded
upper border, white, bordered with black, bristly along the upper
M\(\ apical edge ; the latter somewhat jagged. Coxa; blackish,
their tip brownish-yellow ; the fore coxix; with a grayish-white dust
and hairy with black. Feet brownish-yellow ; the fore femora on
the under side with a brownish-black longitudinal stripe; the hind
femora before the tip with a blaek bristle and tinged with black
on the upper side of the tip ; the delicate hairs on their under side
are somewhat longer than in many other species, although they
cannot be called cilia. The hind tibiie are blackened towards
the tip, and have, towards the end of the upper side, a rather dis-
tinct dimple or impression ; their hind side has no glabrous stripe.
Tarsi [)lain, the four anterior ones fro)n the tip of the first joint,
the two hind ones altogether black. Cilia of the teguhe black.
"Wings grayish hyaline, the extreme tip of the wing black; the

rOLICIKH'US. 69

llilrd loiiffitiuliiial vein is soiiicwliat directed l)iu'kw:irds towards
its end, so tliut its ti}» is ir'ui'ci' to the tip of tlic fourth vein tiiiiii
is usual iu otlior spoeics ; tin; last portion of tlic foiirtli loiijiiludi-
iial vein is almost straifiiit ; on tlii' spot wiuif its usual lleMirc is
situated, tlie surface of llic winji' is distinctly convex; costa but
indistinctly thickened at the tij) of the first lonji-itndinal vein.

J{(ih. Illiiiois ; ( |,e IJaion.)

Ohffcri-dtiini. — It is to ho presuiiu'd, judji'iiijf from the onalouy
of similar Kuropean species, that tlio J <»f D. j)r!iuslu6 has no
black spot at the tip of the vvinjf.

31. I>. roinatllH Loew. % ami 9- — Viiidis, facie Candida, anttMuiis
iiiirris, ciliis oculorina iiil'crinrilnis aliiis, tegulaium ciliis iiigris, pcdilaid
flavis, fentoi'um postieorum apiue superne nigro, alarum vena l<inf.'ltu-
dinali (luarta iion frautil.

(ireen, face snow-white, antennre lilack; cilia of tlie inferior orbit wliite;
cilia of the tegula' Mack ; feet yellow, the tip of the hind femora hlack
above; tlie fourth longitndiual vein of tlie wings not broken. Long.
Corp. 0.17. Long. al. (>.1(J.

Syn. DuUchojuts comiiliis Lofav, Nene Beitr. VIII, 23, 25.

(ireoii or brouzo-frrcen, shiniiifr. Face suow-wliite, tliat, of the
9 rather broad. AuteiiniP altofreiher black, the third joint short-
ovate ; arista with au ahn(»st iinperce])tible puliesceuce ; cilia of
the iid'erior orl'it white. Front shiuin<r frreen. Abdonu'u with
distinct dark incisures. Fore co.\a3 yellow, blackened only at their
very base; in the % their in-ier side and their tip only, in the 9
almost the whole anterior side is beset with small l)lackisli hairs.
Middle and liind coxi\; blackish, their very tip only yellow. Feet
ye'low ; the hind c<ixie with a bristle before the ti}) and tiiifred
with brownish-black on the upper side of their tip. Hind tibia;
slender, their tip l)lack. Fore and middle tarsi black from the tip
of the first Joint; hind tarsi altojretlier iilack. Cilia of the tesruhu
black. Wing-s tinjred with >rray ; fourth loufi'itudinal vein nut
broken.

Mdh-. Lamelhe of the hy])opyLHum hardly medinm-sized, ovato,
whitish, on their apical e(l;fe witli a vestijre only of a narrow black
border and very little ja<r,>red, ciliated with hairs. nio<t nf which are
l>ale. liiml tibia* uu their hin<l side without any bare stripe.
First joint of the fore tarsi a litth' hui^'er than the four followiii}^
ones taken together; the latter are deej» black auil >omewlia^t liat-

7^

.^lifl

TO

DIPTEUA OF XOKTII AMERICA.

[part II.

ti'ut'd. The bristles on tlicuiti»er side of the miiUllo til)iio are very
l)r()h)ii<r('(l and Ix'conie very slender towards their ti|». 'I'lie lirst
joint of tlie nuddle tarsi is of eonsiderable lenji'tii, ciliatt'd on its
ujiper side with aliout nine or ten very lonj?, bristle-like black hairs.
Jl(t!>. I'ennsylvania ; Maryland ; District Coluniljia. (Osteu-
Saeken.)

„ .. .,1;

3H. IJ. seoiiarill<4, iiov. sp. %, — Viridis, facie en idida, antennis
niu'lis, articiilo piiuio infra rulo, ciliis oeuloniiii inleiioribus j)alli(li.s,eiliis
tegulaium nigiis, iti'dibus tlavis, taisis t-x parte iiit,'ris, aiticulis antico-
ruiii iiltiiiiis duohus siibdilatatis ft utilinjuu nigio-pcmiatis, veua ala-
ruui Idngittidinali (^uarta nou liauta.

(ireen, face siiow-wlnte. antenna? Mack, the first joint upon tlie under side
red; cilia of tlie inferior orbit pale; cilia of tlie tegulic black; feet _yei-
low, tarsi partly black ; two last joints of tlie fore tarsi soniewliat thick-
ene<l, feathered with black on both sides; the fourth longitudinal veiu
of the wings not broken. Long. corp. O.li-i. Long. al. 0.24.

I5rifi'ht nietailie g-reen. Antennte black, '.he lower edji'e of tho
first Joint red ; third joint short. Face snow-wliiti;; ;talpi bnjwn-
ish-yellow, the basis black. Cilia of the inferior orl)it yellowish.
Front metallic ji'reen. Fore eoxie yellow, tdacl-ened at the baso
only to a moderate extent, upon the front sidv v ,li a black pubes-
veiiee. .Middle and hind coxa' blackish, oidy llu; extreme tip and
the trochanter yellow. Feet yellow. Hind femora before the tip
with a bristle. Tibiie i>lain, with rather numerous black bristles;
hiiul tibia3 at the ti[) not blackeiu'd, upon the liind side without
glabrous spot. Fore tarsi from the tii> of the third joint black,
not (juite ouce and a half the len<>'(h of the tibia-; their two lust
joints are oidy very sliji'htly enlarged, but closely feathered with
bristle-like nunutc i)lack hairs upon the front and hind side, so that
they seem to be rather l»road. Middle and hind tarsi plain, from
the tip of the first joint black; uixtn the up|»er side of the lirst
joint of the middle tarsi, not far from the tip, thei'e is a stoiit black
bristle. Cilia of the tcgula; black. Wings grayish-hyaline, of
the usual form; fourth longitudinal vein not broken and the fore
margin, near the tip of tin; first longitudinal vein, not thickeneil.
The lanuilhe of the hypopygium of the only specimen which I
possess are almost destroyed; 1 a:u able to state uiily that they
4H'e yellowish.

iM\ jMaine. (Packard.) Mass. (Sanborn.)

DOLICIIOPUS.

tl

39. D. diHC-ifer Ptann. % and 9. — Viriilis, facit* allia, aiitoniiis ui-
gri.s, uiliis (xniloruin iiiferi()ril>urt alliis, te^'uhiiiuii ciliis nigris, peiUbud
flavis, t'eiiioriiiii po.stiuorum apiue coiiuolore, tarnoruiii aiiticoriim articulo
ultiiuo iiii^io, ill iiiare modiue dilatato, alarum veua lougitudinali (juarti
uon I'ractii.

Green; face white, anteunne black; cilia of tho inferior orbit white, cilia
of the teguhe hlack ; feet yellow, tip of the hind femora not blarkened;
the last joint of tiie fore tarsi bhick, in the ^ nioilerately enlarged;
fourth longitudinal vein of the wings not broken. Long. corp. 0.25 —
0.2tJ. Long. al. (l.-.:4.

Syn. Dolirhojms iKih/liiliis Mkiokn', Syst. Pesclir. IV, 86, 22.
Do/irli(i])iis (liscifcr iSi'A.NXii's, Isis IH/Sl, .'J7, 10.
L>ulirliu/nis roiij'usiia ZlcTrKKSTKliT, Ills. L.ipp., TdJ), 7.
DollchoiiiiH i>nli-//iiliis Stakoku, Kroyei's Tidskr. IV, 21, 12.
JUulichojJus discij'er Zkttkhstimit, I)ipt. i>cand., II, .'>33, 28.

Walkhk, Kipt. Brit. I, lii:}, 20.
Dolichopus tanypus LoEw, JS'eue 15eitr. Vlll, 24, 20'.

Bright grocii. P'iico wliito, in the % upon tlio iqipor half irciio-
rally more yellowish-white. AiiteniuB black ; first joint upon the
under si(h' red, third joint elongated-ovate, ratlier large; arista
with a very short, Iiiit distinct jiiihescenee; it is inserted heyond
the middle of the third joint. Front shining green. Cilia of the
inferior oriiit white. Fore co.xa; yellowish, liesct n]ion their front
.side with (k'licate wiiite haii's, and only on the inner side in tln^ 9
with soiue black hairs. Middle and hind cox;e blackish, at the
tij) yellowish. F'eet yellowish; hind femora with a bristle before
the tip. Hind tibiie somewhat brownish-black only at their ex-
treme tip, particularly on the inner side. Fore tarsi, although
darker from the tij) of the first joint, but only the last joint iihick;
middle tarsi from the tiji of the first joint lilack; hind tarsi en-
tirely black, seldom oidy lirown at the base of the first joint.
Cilia of the leguhv black. Wings grayish hyaline; fourth longi-
tmlinal vein not liroken, towards its end soiuewhat more eonverginjj
with tli(! third than in most of the other siiecies.

Mali'. Lamelke of the livitoiivirium not verv lar

U'C, (

lonijated

ovate, white, on the u])per and apical margin with a very narrow
lilack border, on the latter somewhat jagged ami fringed with
black bristles. ][ind fennira not ciliated. Hind tiliia' slender,
"ivithoiit glabrous sjiot upon their hind side. Fore; tarsi exceed-
ingly slender and eloiigateil, the four first joints yellow, still sonu'-
what darker beyond the tip of the first joint, each following joint

i\

t ,

••■'jii,

m

t

■}n

72

DIPTEHA OF NORTH AMKHi'CA.

[part If.

more slender tl'un the previous one; tlio first joint is ecjual to
tliree-fourtlis of tlie tibia, and is soniewliut longer tlian tiie second
atid third taken together; seeond till I'uurth joints l)ut very little
de;'reasing in lengtli ; Hfth joint deep blaek, somewhat flattened,
so that it appears like a snuill ovate disk; at its extreme l)asis it
is (Kjlored with yellowish-white. Wings towards the basis rather
narrow, tlumgh of the usual form. Costa near the tip of the lirst
longitudinal vein with an almost imjjereeptible swelling.

Hub. English River; lied River. (Kennieott.) Silka. (Sahl-
berg. ) White Mountains, N. H. (Osten-Sacken.)

Observation. — A very elose examination renders it certain that
this species, as it appears widely s])read in North America, is
identical with the Euroi)ean D. dit^cifer. I had overlooked this
identity, while describing it from American specimens, as d).
tan 1/ pus.

!l

.■■'*

■ . f

i,».'

40. D. lobatlis Lof.w. % . — Virirlis, facie dilute lutescente, antennis
iiigris, iiiferioribus oculoruui ciliis Havicaiitibus, tegularum ciliis iiigris,
pedibus Havis, femorum posticoruin apice concolore, tarsis antitis inde
al) artiuuli primi apiue iiigricaiitibus, articulo ultimo nigro, in mare lutis-
simo.

Green; face pale luteous-yellow ; antennse black; cilip of the inferior
orbit yellowish, cilia of the tegular blaek; feet yelbw, the tip of the
hind femora not darker ; fore tarsi from the tip of tlu^ first joint black-
ish ; the last joint black, very much enlarged in the "J, . Long. corp.
0.27. Long. al. 0.2G.

Syn. Dolichopns lobatuK LoEW, Nene Beitr. VIII, 24, 27.

Bright green. Face pale yellow, rather whitish below. An-
tenna; black, first joint red with blackish u])per edge ; third joint
short-ovate. Front shiiung, green. Cilia of the inferior orbit
yellowish. Lamelke of the hypopygium rather large, ovate, white,
on the second half of the njjper margin and on the apical margin
with a rather broad l)lack border, jagged on the latter and beset
with black bristles. Fore coxa? yellow, upon the front side with
minute yellowish liairs, oidy on their inner side also with a few
minute black hairs. Middle and hind coxjc blackish, at the tip
yellow. Feet yellow. Hind femora not ciliated ; before the tij*
with a bristle. Hind tibite somewhat thickened al)out the middle,
and colored with darker yellow upon their second half; th'dr iiind
side without glabrous stripe. Fore tarsi hardly once U5;d .i i.olt'

L^^';, *'til4_

I ;

'I

DOLICHOPLS.

IS

the longtli of the tibiaj ; tliroe first joints stalk-like and very slen-
der; from the tip of tlie first joint hlack-brown ; lirst joint sonie-
wluit longer tlian tiie second and tliinl taken tojtetlier ; the tliird
only lialf as lonji; as the second; fourth joint very short, somewhat
broader than the i)revious one, hrownish-hiaek ; filth joint black,
nearly as long as the second, flattened, very much enlarged, so
that it has an almost semi-obcordate shape ; the close l)lack jjultes-
cenee of its upjjcr edge makes it a])})ear still larger and broader.
Middle tarsi from the tij) of the second joint bliick. Hind tarsi
entirely black. Wings gray, towards the fore margin more gray-
ish-brown, narrow ; towards the base the hind margin has two
very remarkable sinuses, a longer one between the fifth and sixth
longitudinal veins, and a shorter one behind the sixth longitudinal
vein, so that there is a lobe between them ; the anal angle of the
wing also projects considerably as a rounded lobe; the fourth lon-
gitudinal vein only with a slight flexure, somewhat more converg-
ing towards its end with the third than is the case in the related
species; the costa at the tip of the first longitudinal vein with
a rather impercei)tible swelling.

Hab. Englisii lliver. (Ketiiucott.)
. Observalion. — 1 believe 1 know also the 9 of this species. It
differs from the 9 of I), disrifer, by its somewhat larger size, its
somewhat more yellowish face, and by the fore tarsi being not only
shorter, but also tinged with black already from the tij) of the first
joint. The fore coxie have, upon the greater part of their anterior
side, some minute l>lack hairs. Although the fore coxte of the 9
have in many species a more extended black pubescence than the
J*, the difierence between this 9 and the above described ^^ is
more striking than usual. This circumstance will render it some-
what doubtful that the two sexes really belong together, until a
positive observation settles the (piestion.

41. D. setosus Loew. % . — Viriilis, nitidu.'?, facie pt inferiorilms ocu-
lorum ciliis allii.s, antenuis tt-uularuiiuine ciliis nigris, joxis aiiticis
pedibusque flavis, tarsis anteiioril)Urt inde al) aiticuli priaii apiece tar-
sisque po.sticis totis cum tibiarniri posticaruni ajMce nigris ; femora pos-
tica pilis flavis ciliata; tiln.-e postiuiB setis loiigis armatie, alarum veiia
lougitudinalis quarta iioii fracta.

Grenti, shining; the face and the cilia of the inferior orbit white; the
antennae and the cilia of the tcpuliB black; fore coxa» and feet yellow,
the four aDtorior tarsi from the tip of the first joint and tlie wliole hind

14

DIPTERA OF NORTH AMKRTCA.

[I'AllT II.

':A

i

onos, including the tip of the hind tibiae black ; liind femora ciliated
with yellowish liairs ; hind tibi«; armed with long bristles; fourtli
longitudinal vein of the wings not broken. Long. corp. 0.23 — U.24.
Lung. al. 0.125.

Sy.n. DoltchopuK silosus Loew, Berl. Knt. Zeitschr. VI, 213, 63.

(iroon, Hliiiiiiifr. The narrow fnco wliito. Antciuuu bltu-k, tlie
lower edge of tlie first joint hrowiiisli; tliinl joint ovale, nut
rounded at the tip. Front ratiicr dark <>'reen, hut little shiniii<f.
("ilia of the inferior orbit whitish. Lainelhe of the liy))opyginni
of inediuni size, broad, rather rounded, white with narrow border,
fringed on the upper and ajtical margin with l)lack I)risties, tho
latter but little jagged. Fore coxiK pale yellowish, dusted with
white; their short jjultescenee near the tip and upon the inner
half of their front side lilack. Middle and hind eoxio blacki'!.,
with pale yellowish tij). Feet pale yellowish ; the hind femora iiave
but one bristle before the tij) and an; ciliated wiih long yellowish
hairs upon the under side; the iiiml tiliia; are bJaek at the (ij) and
have upon their upper, as well as upon their under side, longer
bristles than usual ; J am not able to distinguish a glabrous spot
ui)on their hind side, but at the tip of the upper side there is a
nhort pale line. Fore and nuddle tarsi from the tip of the first
ioint, hind tarsi eutirelv, l)laek. Wings a'ravish hvaline ; eosta at
the tip of the first longitudimil vein distinctly, but not strikingly
thickened; the last section of the fourth longitudiiml vein mode-
rately iniieeted upon its middle ; the hind transverse vein perpeu-
tiicular.

JIab. Massachusetts. (Le Baron.)

Sff-.^'"" ■
','11 :..■,■■■

4*1. D. incisiiralis Lokw. % and J.— Viridis vel aeneo-viridis,
facie alba, antennis nigris, ciliis oculorum inferioribus albidis, tegula-
runi ciliis nigris, pedil)us tlavis, fenioiuni posticoruni ai)ice concolore,
tarsis anticis inde ab articuli prinii apice nigris, in uiare simplicil)us,
alarum vena longitudinali (luarta non fracta.

Green or bronze green ; face white; antennic black: cilia of tho inferior
ortiit vvliitish, cilia of the tegnlai black, feet yellow, the tip of the hind
femora not darker; fore tarsi from tlie tip of the first joint black, j)lain
♦■ven in the % ; fourth longitudinal vein not broken. Ijoug. corp. 0.17«
Long. al. 0.1(5.

Bv.'*. l)<)Hiho})u» inrinuraVis LoKW, Nene Heitr. YlII, 2,'), 2l?.

Ui'cco t>r bi'yuze grcto, wtU jtifj-crved sj)t'ciru«nrt |mrer gretn,

:|...,

GYMNOPTERNUS.

T5

sliiniiif^. FiU'c wliito. Aiitcniiiii l)liick ; the inferior odjro of the
first joint red or rcddisii-Urown, widcli, iiowever, is not distin'-tly
j)ereei)til)lo in some spccinicns ; third joint sliort ; arista willi a
hardly perceptible i)ultisceiice. Cilia of the iid'erior oi-liit white.
Front <rr('eii. Alxlonien with remarkably disliiict black incisures.
Fore cdXH' whitish-yellow, only at the extreme iiasis snnn'what
blackened; their front side is beset npoii its i)asal half with nnnier-
ous black, very delicate and rather sparse hairs. Middle and hind
<'oXie black, only at the extreme tij) sonnnvhat yellowish. Feet
yellowish. Hind femora betbre the tip with a bristle. Fore and
middh; tarsi blackened from tin; tip of the first joint ; still the
whole lirst joint is also somewhat dusky. Ilind tiltia- with a l)lack
tip; hind tarsi entirely black. Cilia of the te^-nhe black. AVinjrs
grayish ; fourth long'itndimd vein only with a sli<i'ht flexure and
towards its end somewhat more than usually converninji' with the
third longitudinal vein.

M(iU\ r.anu'lhi! of the hypo])y,irium of medium size and of a
vounded-ovate form, white; on the upper and apical maru'in with
a rather narrow black lK)rder, on the latter jaji-urd and friii<red
•with black bristles ; hind femltra ciliated with moderatt'ly lonji' and
very delicate pale liairs. Hind til)ia> slender, j)lain, upon their
hind side without fi'laltrous stripe. Fore tarsi plain, about once
and a cpiarter the lenu-th of the til)iie; their lirst joint is lonji'er
than the two followin<i\ Jjut somewhat shorter than tht; three
I'ollowiiiji- taken tog-ether. Costa at the tip of the lirst longitudi-
nal vein with a very short but distinct swelling.

Ilab. Trenton Falls, N. Y. (Osten-Sacken.)

Gen. III. WYIWXOPTERXl'S.

The fidlowing characters of the genus Giimnupternnii are to be
<il)served : The first joint of the antenniC is hairy upon the upper
side, the third almost never remarkal»l_v elongated; arista doisal.
The hypopvgium is entirely disengaged, th(^ exterior iip])cndag<'S
sire lameiliform and of moilerate size. The lirst joint of the hind
tarsi is shorter than the sccoml and not provided with bristles,
'I'lie third and fourth longitudinal veins of the wing> are parallel
«r almost so.

The last of these characters is applicable to all the \orth Amc-
ficao s;i)ecies of iiijiniu>j^»(('fomg known to me. Ann)n<j the species

f'/'

76

PIPTERA OF NORTH A>;KRICA.

[I'AUT II.

'4
I

of the old world which have l)eeii placed into the genus (ii/)nno/)-
tiTiiHti there certainly is a wliitle group of closely reliited species
the third iind fourth longitudiiuil veins of which ilccidedly (,'on-
verge. ]Io\vever, as this group must necessarily he separated from
the genus (ii/miwjjIcrniiK, it could not prevent nie from adopting
the piirallelism of the third and fourth longitudinal veins as cha-
racteristic marks tA' (ii/tiinoji/cnius. I'rccisely this character dis-
tinguishes in the easiest manner the sjjecies of O'l/niiioj/liTnuti from
those of the following genera, which, like Cii/ii'noji/crnus, have
the upper edge of the first joint (jf tiie antcnuie hairy, and are
without bristles upon the first joint of t!ie hind tarsi.

Most of the species of (/i/inndji/criitis are snuill and have shorter
antenna', )mt a more distinctly jiubescent arista than the species
oi DulichopHH. They are much i)oorer in suita!)le )thistic chaiiu'-
ters for the distinction of the species than the latter. The feet
of the nniles are very seldom ornamented.

The color of the cilia of the inferior orl)it is also of the highest
importance for the determiiuitiou of the species of the present
genus. Unfortunately it cannot he so easily ol)served as in the
sj)ecies of iJolichopus. Its discriniination in some species, of
which I have oiUy single specimens, was totally im})ossil)le ; as to
others, I often remained uncertain. In the former case I liavo
been silent about their color, and in the latter I did not use any
l)ositive expressions. Under these circumstances it was impossible
to use the color of the cilia of the lower orbit as a basis for a
suljdivisiou. This is, however, but of little moment, as the cilia
of the lower orbit seem to be black in almost all North American
species of (T/y?7i«ojj/r/v;«.s. Another important mark for the dis-
tinction of the sj»ecies is the hairy or glabrous surface of the scu-
tellum, provided there is a sufficient number of well preserved
specimens; otherwise, if the specimens are few or not well pre-
served, this mark will be rather uncertain. I did not wish to
omit characters of this kind altogether, but have to request the
reader not to place too much contidence in them, especially when
my expressions seem to imply doubt. The same rule applies to
the form of the lamelhe of the hypopygium. In iminy s|)ecies
they have the form of an erect crescent, fastened by its lower
point. This form will only then be recognized, when tliey are not
closely applied to the hyi»opygluin with the concave side; if the
latter is the case, then Ihey appear only as snndl lamelhe, with

GYMNOPTERNUS.

n

rounded ends, niid tlio letijrtli of which is jrrontor tlian their hrcadth.
I have, then, culled tiieiii rounded, witliout further remarks uliout
tiieir form ; to [irevcnt niistal<es, h(»\vever, I must state tluit this
JipitJics only to tiio convex odjirc. J iiave omitted otlier eliaraeters
Jn tiie descriptions, hccausc they are conunon to all North Ameri-
can sjiecies known to me; for instanci, the presence of only one
liristle at the eml of the hind femora, etc.

This genus derives its name (yvuidj naked, and rtrfimj the sole)
from the absence of In'istles upon tiie first joint of the hind tarsi,
whereliy it differs from the genus Jiulic/iitpii.-i, \>) wliich its sj)ecies
fnrmerly i)elonged.

The species described liy Sny as Polic/idjiKt^ <>}i.'<fiirii!< seems to
be a (ri/)nn(i/ttcnn(.<. J do not know (»f any other species of NDrtli
Ar.ieri(.'an (r[/iii>i(jplrrinis, descrilu'd )iy a previous autiior. This
undoubtedly arises from the circuiiistancc! that the species of (lipw
}ti)jt/crnan, on account of their small size and their apparent insig-
nificance, liave been less noticed by eoHectors. The nunjl)er of
Sjtccies known to me sIkjws that North America is very rich iu
species of this genus. To produce a really satisfactory treatise
on the subject would recpiiri; much more nuiterial than that over
which I could dispose, because the i)ositive discrimination and
e.vact delineatiou of the characteristics of the species ]U"esent many
dilliculties.

I will give now a dichotomic tabic for tlie purpose of deter-
mining the species, and a synopsis of the .systematic arrangement.
As will l)e seen from the latter, the Inilk of the species known
to me, are very nearly rclate(l and form but a single group ;
whereas but a snuill numl)er show characters which isolate them
from the others.

■I'M
■ i'-f

: it;

^{

Table for the determinfitioii of the Species,

Color non-metallic. 1 flavus ^.w.

Color metallic. 2

Tliird joint of the antennw with an elongated point. 2 subulatua /.n:
Third joint of the antiMiiire without elongated point. 3

Prevailing color of the feet lilaik. 4

Prevailing i^olor of thf fcft yellow. (J

Thiril joint of the antenn.'e remarkahly hairy. 3 scotias /.»:

Tliird joint of the anteiiiiie with scarcely perceptihle hairs. o

WliigH grayi.sli hyaline. 4 barbatulus /.»•,

Wingd somewhat tinged with blackish. !i tristis, n. sp.

IS

T)irTKnA OF NdRTlI AMKUICA.

r

^ ( Tip (if flic liiiid ft'iiiorn Mnckinh.

' T\\t (if tilt' tiiml feiiKini not blackish.
^ ( Tlionix (lark violet.

( Tliorax not vioU-t.
Q { Coxa' up to tliii tip soniBwliat liluukiah.

( Coxa- ,vi'll(i«'isli-\vliitc.

/ !''()r« coxai up to tlic tip Mackish.

[r.AHT ir.

C exilis hi:
I

8

()

7 spectabilis f.n:

>^ albiceps /.»•.

0 BubdilatatuB /.ir.

0 -' Fore coxa! ciitirt'ly yellow, or at the utmost somewhat iiilusi;att'il near

( tlii^ haHe. 10

/■ Hind tarsi from tlu' tip of the first joint hlack. lO laevigatus /.»•.

10^ Hind tarsi t'lwards the tip but Uttlo dusky, at the utmost brownish,

I never blauk. H

f AntcnnjB entirely black. 12

H>
] 1 frequens /. »■.

i;j
12 lunifer Lw.

U
Interior appendagea of the hypopygium ptmicillate.

13 fimbriatUB Lu:

ppendacres of the hypopygium not penicillate. 15

Third and fourth longitudinal veins but slightly converijing.

14 despicatus /.«'.
Third and fourth longitudinal veins altogether parallel.

If) difHcilis /.(/■.

f Middle and hind coxre from the basis distinctly blackish, 17

1() J. Middle and hind coxre yellow, or, at the >itniost, the former witli a

t grayish tinge. II)

j_ J Lower jiart of the face of the 9 distinctly hairy. 1(5 iiigribarbua f.x:

^ The lower part of the face not hairy. IS

11-

<. Antenna' partly red.

jn/ Lamella' of the hypopygium l)lack.

•■ Laiiiellie of the hypopygium not black.
.„ f Lamella' of tln^ hypopygium dark yellow,

I- Lamelhe of the hypopygium white.

{Interior appendagea of the
Interior app<'ndages of the

J

18

pari
f Antennre small.
I- Antenn.-p of tolerable size.

jq ( Venter and posterior maruin of the pleura? not yellow.

I Venter and posterior margin of the jileune yellow,
f,.^ 5 'I'liorax brightly shining, front while.

( Thorax rather dull, front gray.

2^ f Hypopygium remarkably stout and large.

l Hypopygium of the usual size and thickness,
ijo f Antenna; very small.

I Antennae of middle size.

17 parvicornia Lw.
Is opacus hr,
110
21
10 politllR f.ir.
20 debilia /.»•.
21 crassicauda /.ir.

22 minutus Lw.
23 ventralis Lie.

Vdf'

, f ■■ *.■ :

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ill

OYMNorTKKNrS,

Fiisfenuitir tirriunirm'iit nf thfl Specie»,

I. Coloring of tlic \«><\y iion-iuotallic.

1. flavuB /.»•.

II. Coloring of tlm body tiM-tallic.

A. Tliinl joint of tlif niitt'iiiiii' witli an clongatt-.l point.

'2. Bubulatus A'/'.

B. Tliinl iniiit of tlin aiitfiiim' uitliout an t'loiiuati-d point.

A. I'l-fvailimr color of thi' fet-t Mack.

3. Bcotias /."'.

4. barbatuliis /.»'.

tristis, n. sp.

B. Prevailing color of the fci't yi'Uow.

fi. exillB /.".
7. apectabilis A"'.
6. albiceps /.»•.
!'. subdilatatus l.ic.
In. laevigatuB /."■.

11. frequenB /.«•.

12. lunifer A"-.

i:^. GmbriatUB Am.
14. debpicatus Lw,

1."). difflcilia f.<i'.
I'i. nigribarbus Au'.
17. parvicornis Aa".
1**. opacuB At.
T.». politus A»r.

20. debilis / '■.

21. crasBicauda Litt.

22. minutuB /.":

23. ventralis Aw.

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IMAGE EVALUATION
TEST TARGET (MT-S)

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Photographic

Sciences

Corporation

33 WbST MAIN STREET

WEBSTER, N.Y. 14580

(716) 872-4503

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80

DIPTEUA OF NORTH AMERICA.

[part ir.

:!|,

DESCRIPTION OF THE SPECIES.

I. CoLORlXO OF TIIK HdDY NON-MKTAI,LlC.

1. (a. flavUH LoKW. % and 9- — Fliivus, ahduniinis si'gmeiitia interme-
diis pleriiiiuiUH viresceiitibiis.

Yellow ; the middle segments of tlie abdomen usually greenidh. Long,
coip. 0.1(1—0.11. Long. al. 0.12—0.13.

Sv.N. (iijmnnplfrnuxjiiiviix LoKW, Neiio Ueltr. VIII, 28, 1.

I'ulc ycllowisli. Fair \iiitisli. Aiitciiiiii' dark yollow, the third
Joint with a wry ixtintci hrowiiisli or l»hu'i<ish tii* and with
nilhcr distinct liairs, winch arc visibly sliortcr in the female.
Arista l»iacl\ with an almost impcrccptihle imhcsccncc. Front
and (tcciput of a <rrccnisli cohtr, Imt thiciviy (histcd witli yeUow .so
as to a|>i»car dull and altojrcther lijjrht {rrcenish-jrray. Cilia of the
inferior orbit white-yellowish. Thorax entirely yellow, not unfrc-
<|uently with a sliirht trace of a jrreenish lustre, its Itristles l)Iack,
the .snuill hairs pale, scutellum provided witli two Mack Jiristles,
otherwise jrlahrous. Abdomen with yellow hair, the stout liairs
on tlie incisures somewhat darker, but not black ; the middle and
sometimes also the posterior sefrments of the abdomen show a
frreenish lustre; hyi)opyfrinm yellow, lamelhe small, yellowish-
white, without a dark umrfriii, thinly ciliated with short yellowish
hairs. Feet white-yellowish, their scanty bristles black ; the
smaller lutirs yellowish. Cilia of the tejridie yellow. Wiupr.s
towards the anterior nuufrii' yellowish, otherwise more yellow-
grayish.

Hab. Pennsylvania. (Osten-Sacken.)

II. Coi.OUINCJ OF TIIK noDY METALLIC.
A. lltird joint of the nntrunfr in'th on rlmif/atfd pnhit.

2. a. SP.l1»lllatllH LoKw. % .— Viridis, tliorace snl.opnco, antennanim
arficulo tertio acutissimo, hirto, setd subapicali instnicto.

Oreen; thorax rather dull, the third joint of the antennie very pointed,

CiYMN01>TKHNlS.

81

rnnL'li1\' hairy, witli a sultnpioal arista. Long., forp. 0.13 — 0.14. Long,
al. (».li;.
Syx. (n/miinjifiriiiis suhniiit'i^ Lokw, Ncue Reitr, VIII, 20, 2.

(iri')-ii, iiiiiiU' (lul

|i!UL' uniy-ltrowiiisli dust, (.'specially upon

the tliunix. Fnct.' ^rny-wliitisli. Tliu first joint of the ;iiiteimi«
hliiek-ln'owii, tlie second red, the third dark brown, jit the' root
red, hnnsually lonjr and shar]»ly jiointed, and covered with nuich
lonjicr liairs than is tlie case with the other species <if the i«anie
jrenus. The hhick arista has a hardly |)er«'eptii)le pnl)esccnce,
is scarcely somewhat loimer than the third joint of the antenmc,
and iri inserted abont its last tliird, so as to l)e nearer to the tip
tinui is the case with the other species. Front, in c(".se(|nenc<i
of a thick coverinii' of diist, dull greenish-frray. The color of
the cilia of tlie inferior orl»it cannot easily he recon-nized, how-
ever oidy the lowest of them may possibly be of n pale color.
Thorax and scutellnm, on account of a thick coverinjj of dust,
pretty dull jrray-jxreen ; the scutelluni bears, as usual, the two black
bristles, and seems otherwise to be entirely without hairs. Abdo-
men more jrreen, and brighter than the thorax. The black hy]to-
]iViiium rather stout, with small yellowish lanu'lhe, which are cili-
ated on the martrin with short l>lack hairs and have no dark edge.
Interior appendages simi)le. ])rovide(l with (Uie hair ujtoii the u])per
side and with two hairs ujion the ]»oint, before it is bent down.
CoXiO and feet i>ale yellowish, fore cox-.e with black hair. Cilia
of the togidiw black. Wings sonu'what yellow-gravish, large and
broad, especially towards the tip; the anal angle rounded olf.
Hah. Trenton Falls, N. Y. (Osten Sacken.)

-, '. !'■

(:

iia|:i.i

Vi. TllTUn JOINT OF THK ANTENN.K WITHOUT EI.ONOATET) 1H»IXT.

A. Prevail 1)1(1 color i>f iJir fi'ft }>liu-l\

3. C«. scot ias LoF.w. ^ and 9. — Atro-virens, peililms nieris, troclian-
tcrilius, genilius, tiliiis, tarsnnitnque antcrinruni l)asi llavifantilnis, tertio
antennarnin articiilo hirto, facie non iiilosa.

Ulack-creen, foot black ; trochanters, knoos, tiliiro, root oT the four anterior
tarsi yellowish, the third joint of the antenna- routrlily hairy, face not
hairy. Long. corp. 0.13 — 0.14. Long. al. 0.14 — O.!.").

Syx. (liimnoptvrntis sculics Loiow, Neiie Beitr. VHI, 2'J, 3.

Dark black-green, or almost metallic l)lack. Face and front
gray. Antcnnio entirely black, the third joint elongated, ovate,
6

■ji,.

i^

wr

82

DIl'TERA OF NORTH AMERICA.

[part II.

not very In'oad, pointed at llii; end, witli loiifjer hairs than in most
of the other si)eeies ; the arista is inserted in its niichlle and has
a rather indistinct pnbeseenee. (.'ilia of the inferior orl)it bhiok.
Seuteilum witii tiie usnal two bristles; otherwise I cannot per-
ceive any hairs ui)on its snrfaee. Feet black. Trochanter with
tiie e.Ktreme tip of the lirst joint of the coxa, tip of the femora,
the tibiie, and the roots of the fonr anterior tarsi, yellowish, l)nt,
on account of the density of the short black hairs, of pretty dark
:ipl»earance. The hind side of the hind til)iit' is clothed towards
its end with dense black hairs, so that it ap}»ears p''''tty black ; the
root of the hind tarsi is brown. Cilia of the pale yellowish te^nhe
black. Ilalteres yellow-whitish. Winjrs {rray-blackish, a little
darker towards the anterior margin. The small lumellui of the
liy})opygium are black.

JIab. English River. (Kenuicott.)

4. ii. barbatllllis Lof.w. % and 9. — Atro-virens, pedibus nigris,
trochanteribus, geuibus, tibiis (excei)to tamen posticarum apice) tarso-
ruiuqiie anterioruin basi tlavicaiitibus, alis ex einereo-hyaliiiis, iiifera
faciei parte uigro-pilosa.

Black-green ; feut black, trochanters, knees, tibite (with the exception of
the tip of the hind ones) and the root of the four anterior tarsi .vellowisli,
wings grayisli-lijaline, the lower part of the face with black hair. Long.
Corp. 0.12. Long. al. 0.12—0.13.

Syx. GynDioptcrnus barhatiiliis LoEW, ^'eue Beitr. VIII, 29, 4.

Dark black-green, face gray-white, the inferior part of it some-
what swollen transversely, and with small sparse black hairs.
Anteniue entirely blue!:, their third joint broad, pretty rounded,
and only with short, scarcely percei)tible hairs. Pubescence of
the arista extremely short, hardly ])erce])tible. Front dark me-
tallic green; the dust on its surface can only be perceived in an
obli(pie direction. Cilia of the inferior orbit black. Besides the
usual two bristles upon the scutellum, there are a few short,
extremely slender, and therefore scarcely perceptible hairs. Feet
black; the tip of the first joint of the coxa;, the troclianter, the
tip of the femora, the tibise, and the root of the four anterior
tarsi yellowish, the tip of the hind tibiie to a moderate extent
black. The cilia of the yellow tegulie black. Ilalteres white-

GYMNorTKllNLS.

83

'■1

yellowish. Tho wiiijr.>< tliisky with jrniy ; tho sinall lanu'lhu of the
liy|Ki)tyjriiiiii l>rowii.

Jiiilj. Middle States. (Osteii-J^aekeii.)

t». <». tristis, II. .<p. ■J, and 9- — Atro-virfiis, pedilmn nigris, scnilm.-*,
tiliiis t.iisdiiiiiniui' aiitoriorum basi If'staceirt, tt-rtio antfiiiiaruiu artieulo
niiilo, alls I'igricaiitibuB.

Hlai'k-L'reen ; feet black, kiiefs, tibi.-p and tb<* ntot of tlie four I'li^crid.-
tarsi browiii.-b-yellow', tlic tliird joint of tbo antcnn.T bare ; wings l)lack'
isb. Loni,'. I'orp. 0.1:5— 0. !.".. J.ong. al. (M-^- O.!,").

KfScMiMc- iiiiich intt (tnly tlic (i. srnt/ds. l)iit also (1. h(irh(ihiln.<.
Ulack-jiTeeii, M)n)ftiim'.s more int'taiiic-Iiiark. Tace of llie ^
i)li'(k, (if the 9 black-^ray, tiie latter much l»i-(i;irler tiiau in the
1 ; upon its lower part, in the 9. several hardly perceptihle l)la(!k
hairs, whicli 1 did nut observe upon the face of the S . .\iileMiiie
entii'ely l)lack ; the third Joint hroad, rather short, however sonie-
wiiat loiiti'er in the ^ than in the 9. hare, that is to say. only with
tlie usual iiiieroseopie i)nl)eseenee, which is very ditlieult to ob-
serve. The Hither stronji; arista is also covered with this almost
inipereeptii»le juihesceiiee. Front dark metallic jrreen ; t!ie rather
whitish dust upon it l)ecoines visiltle, when viewed in nn ol)li(|ue
(licection. Cilia of the inferior orbit black. The scntellum has
besides the usual two bri>tles, also some shorter hair. Feet
l)lack, tip of the eo.\;u and trochanters in well maturecl s]»ecimens
hardly much paler; tii» of the femora, the tiltia", and the root
of tlie four anterior tarsi brownish-yellow; tip of the hind tiliia^
brownish, the ro(»t of the himl tarsi sometiiiu's brown. In less
matured specimens the lower side of the femora is mostly pitch-
brown. Cilia of the te^ida^ lilaek. The small brownish-l»lack
lanu'lhe of the hypopyjiium are crescent-shaped, and adhere with
the concave side to the hypopyu-ium. i^(t that their true foi'm cannot
be easily perceived ; uii their convex side they are fringed with
small blackish hairs, lait not jac-tred. The winjrs are comparatively
loiijr, distinctly tinged witli smoky black; the third ami ftttirth
h)n;^'itudinal vein.s show towards the end an iiidicati(»n of a slipht
conver<rency ; the hind transverse vein is eomi)aratively distant
from the nnirgiu of the winjj.

Hah. Sitka. (Wahlbernr.)

Oh^crratioii 1. — (ryuin. tristis is distin*rui.shcd from (hjmn.

m

^IW

.a I

I

w;-

■ -ft ;i.

84

PIPTERA OP NORTH AMflKICA.

[PAIIT ir.

hnrhnlidna by its larpror sizo, its lunpcr and (lar]<('r wiiiji's, and hy
a (larJicr and less liairy fact> ; the male furtiu'r diilVrs hy tlio <,nvatet
length of tiie laiiu-Ilaj oftiio hypojtyfrimii. From (I. nfofins it dif-
I'tTs hy th(.' third joint of tlu; aiitt'iiiiiL', which has not ilio long hairs,
so apiKirciit in (/. scolidfi.

(Hnii-rro/ion '2. — A niak; from the same locality shows a con-
siderably stronger eonverffcncy of tlie third and fmirth lon^ituilinal
veins, coinciiles, however, so mnch in all the other characters with
the rest of the nudes, that I cannot consider it for more than u
variety, although a very striking one, of (i. Iri.'-lis.

15. Prevail i)ui rolor of the feet ijeUow.

6. <■• oxiliH lionw. %. — Viridis, ptxlibus llavis, coxaruni intermedia-
rum basi tVmorumiiue posticorum apice nigricaiitibus, tarsis fusuis.

Green, witli yellow feet, tlie basis of the middle eoxie and the tip of the
hind femora blackish, tarsi brown. Long. corp. 0.10. Long, ah 0.11.

Bvx. (iiimiinj)tviniis ij-ilix Loew, Meiie 15eitr. VIII, 30, 5.

(Jreen or bluish-green, not very bright. Face ami front light
grayish. Antenn-.e brownish-liiack ; the second joint and tlie root,
of the third reddish-brown ; the third joint comparatively rather
large, not very broad in proportion to its size, not rounded at the
tij), distinctly hairy; the ])ubescence of the not very long arista
is diflicult to ])erceivo. Cilia of the inferior orbit l>la(dv. Tho-
rax, in conse(pience of a light cover of dust, somewhat dull, and
grayish-green. In one specimen only, J ))erceive upon the
scutellum, besides the usual bristles, a few snmll hairs, which are
rather indistinct. Feet pale yellowish. Middle coxae upon the
outside distinctly blackened beyond their middle. ]lind coxa^
darkeiu'd only at the basis. Tip of the hind fennira distinctly
blackened upon the upper side. Fore and middle tarsi infuscated
from the tip of the lirst joint; hind tarsi black-brown to the same
extent. The row of .short small bristles which is usually found
ui>on ijjo u])iter side of the fore tibiiu in the species of Gf/mvop-
terni(.-< is less developed here than in most of the other species.
(Mlia of the tegular black. Wings gray. The snndl lamellae of the
hypopygium yellow, fringed witli rather ai»parcnt, snmll black
bristles; their form is rather kidiu'v-shaped, still tJiey have in the
lower corner a very snudi, somewhat protruding black flap ; the

B?'''

H

1

GYMNOPTKIINI'S.

^i)

interior nppon(la<ros of tlio iiypopyjiiinn lionr a fow hairs iR'lorc
tiio tip.

ll(il). IN'iinsylvaiiia. (OsU'ii-Sndvon.)

T. («. spt'etitbiliH Lokw. 9* — Thoi-ace violac<!o, anteiinis iiigris, coxia
iiiirricaiitilius, {H'dilms llavi.s.

Thorax violet, anti'iina> black, cox;l> blackisli, feet yellow. Long. corp.
0.17. Long. al. (t.l7.

Sy.v. (ij)niioi>tt'rntis spi-rtnliHis LoEW, Neu« Reitr. VIII, 30, C.

Is aiii .11^ tlio larjrcst Norlli Aincriciiii sitccics of tliis liTiiiis
known to me. Face and front witli an alni(»st silvtry-wliitc dnst,
thoui^li upon tlic latter tlie dust is less tliick. Anteniue altnuctlier
black; third Joint short; the arista is somewhat stont at the ha>is
and has a plainly pereeptihle jtnheseenee. Cilia of the inferior
orbit idat'k. The npper side of the thorax metallic violet, the scu-
tollum likewise; the latter lias some short hairs in the middle.
Abdomen blackish metallic jrreen. Iirijiht. All tin; coxa' np to the
extreme tij) blackish. Feet yellow, tarsi from the tip of the first
joiid inftiscated; tiie usual row of bristles up(Mi the upper side of
the fore tiliia' complete and distinct, llion<rh the single bristles are
comparatively not lonjf. Cilia of the teunhe black. Winirs
tiiip,ed with g-ray-brown, towards the anterior nuirjiin a little
browner; the third and fourth lon<i-itmliiial veins perfectly parallel.

Hah. New York. (Osten-Sacken.)

Ohiicrralion. — Had Mr. Wiedenuinn not staled the si/e of />i>-
livhopus obscurus Say to be l{r line, I woidd have most certainly
believed that my G. .sy^iv/o/^/Z/.s is the />. i>h,<<-uriifi of Mr. Say.
Nevertheless the statements of y\M. Wi«'demann and Say about
J), uhncio'itft do not apply so closely to Ci. sjicclahilis as to waive
such an important difference and to consider both species as one
and the same.

■ r

V

f:ui

,.■1 ■

•■ I ■

1^4; -I

8. <». albiceps Loew. 9 • — Thorace violaceo, antennia rufis in apice
fuscis, coxis pedibusciue (lavis.

Thorax violet, the red antenna? brown at the tip ; coxa; and feet yellow.
Long. corp. 0.17. Long. al. *>.17.

Sy\. Gi/niiioptcrnus aVnaps Loew, Neue Beitr. VIII, 30, 7.

Face very broad, more so than that of (1. f<jJi'ff(/hiI'K, snow-
white. Antenmu dusky red ; third joint small, rouni.ed, dark

'V.:^

1;:,-

■I.

!
!

■i

I^-W

86

DIPTERa of NOHTIl AMERirA.

[I'AUT ir.

l)rowu tipon tho apical half. Arista with u foiiiparativcly long
and sti'iiiiiif? jdiltcsccncc. Front covered with a siiow-wliite dust.
Cilia of tlie inferior orhit biaek. Tiiora.v und scntelluin metallic;
violet ; no hairs are i»ercej»til»le upon the surface of the hitter.
Alxlonien metallic dark frreeii. Co.xa'and feet yellowish; middle
••oxa- upon the outside with a frrayish streak. 'I'arsi from the tip
of the lirst joint {rradually hhickened. 'I'he nsind row of hrislles
on the ujjper side of the fore tiliia' is extant and cuinplete; the
sinjile hristles, however, e(»mi)aratively short. Cilia of the tejiuhe
Mack. Winn's tinjrcd with jfrayish-l)rown, a little more lirown
towards the anterior nnirji'in; the third and fourth longitudinal
veins very slightly converging towards the end.
Ilah. Middle States. (Osten-Sacken.)

9. a. Hiilidilutatiis Lokw.

-Viriilis, antcniiis iiiiTis, coxis niirri-

•-■*■;

cantilius, aiitiuarnn» apice ptMliliusiiue llavis, maris tarsoium anticorum
ai'ticulo ultimo depresso, siibililatato.

Green; antenii.'fl l)lack ; coxie lilackisli ; tip of the lore coxw ami the feet
yelh)\v ; the last joint of tho fore tarsi of the % liatteiieil and a little
enlarged. Long. eorp. U.i;). Loni;. al. O.i:).

SvN. <i'i/mnopl<TiiHs suliililatatus Lokw, Neue Beitr. VlII, '.il, 8.

Metallic green, rather bright. Face covered with a whitish
dust. Antenna' entirely black; third joint short, rather rotmded;
arista with a scarcely perce|>tible, extremely short pul»esceiii'e.
Tho cilia of the inferior orbit seem to be bhnk ; upon the scutel-
hini, l)esidc.>5 the usual two bristles, a few small hardly ))erceptible
hairs are inserted. The rather large lameihe of the hypopyginm
arc more kidm'y-shai)ed than crescent-shaped, upon their lower
side brownish-yellow, upon the upper i)art brownish-black, closely
fringed with black bristle-like hairs; the interior ajjpemlages are
simple. The fore ooxte lilackened as far as the middle, middle
and hind eoxie almost as far as the tip. Feet yellowish, a little
more slender than in the allied species. The hairs on the hind
feinoi-a are also blackish upon their under side, and more distinct
than in the related species. The usual row of bristles on the
upper side of the fore tibiic is extant, but the single bristles are
very short. Fore tarsi from the tip of the tirst joint strongly
infuscated, towards the tip black, very sit iider, but hardly longer
than the tibiju. Their first joint is as long as the two following
taken together; the last joint is flattened and a little enlarged.

;t4^?:?lt

?c

OYMNOPTEUNUS.

87

the pnlvilli also larger than usual. Tlic luidtUe and the hind
tarsi strouffly infuscated IVoin (he tip of the first joint, towards
the tij) binclv. Cilia of the u-guhu blaek. Wings tinged with
)>lackisii-gray.

JIab. Middle States. (Osten-Sacken.)

OhKn'rafiun. — A single feniide s|>e(iinen agrees with the just
deserilx'd male of (t. suhtlilalalua in the eolor of the eoxa», and
cannot therefore belong to any of the other species known to me;
I am prevented, however, from taking it for the ? of O. subdila-
talus on acc(junt of the more clumsy shiipe of the feet.

^■■mi

•■•*

;''r m

I's, -iti

m

in,

lO. ii. Iwigatlis LoEW. % . — Viridis, thoraco subcrenilesscente, niti-
di.ssiiuo, aiit«niiis parvia iiigiis, articulo socundo et teitii liasi obscure
rnlis, coxis aiiticis totis i)e(lil)U!i(|U« jKiUide Davis, tarsis posticis inde
ab articuli piiini apice nigris, lauu'Uis hypopygii pallide liavis, apjiendi-
cibus iuterioribus siniplicibus.

Green, with a somewhat violet, very briirht thorax ; the small antenna)
black, the second joint and tlie root of the third dusky red ; the whola
fore coxa) and the feet yellow, the hind tiirsi from the tip of the llr.--;t
joint black ; the lamella- of the hypojiygium i)ale-yellow ; the interior
appendages simple. Long. corp. 0.12., Long. al. 0.12.

Syx. Gi/mtiopterniis Iwviijiinis Loew, Neua Beitr. VIII, 31, 9.

Green, bright. Face and front covered with whitish dust. An-
tenme small, black ; the second joint and the root of the third
dusky red. Arista with a short but distinct pubescence. The
cilia of the inferior orbit seem to be bliick. I'i)])cr side of the
thora.x ))luish-green and very bright. Vpon the surface of the
scutelluni, besides the usual bristles, there are a few quite imper-
ceptible little hairs. The snniU lamella) of the hypopygium are
ligiit-yellowish, with a scarcely jjcrceptible blackish border ami
crescent shaped. Co.xie and feet white-yellowish ; the mitldle coxie
on the outside ahnost as far as tiie tip, and the hind coxa^ at the
root, blackened. The hairs on the feet are somewhat coarse, and
the usual row of bristles on the ui)per side of the fore tibia' con-
sists of comparatively long and rather strong bristles. Kind tarsi
l)lack from the tip of the first J<iint; fore and middle tarsi infus-
cated from the same joint. Cilia of tiie tegidu' l)hick ; wings
tinged with blackish-gray ; the end of the third and fourth longi-
tudinal veins parallel.'

JJab. Middle State*.

«' ■■■'■

' : . ■ • I

,i

I..- '

^

88

MITKUA OP NOUTFI AMFIUrA.

[pAnr It

Olt.'<crrnfiiii}. — Il'tlic culdriii;:; of tlic tiirsi slmiild not prove cuii.
8tiiiil, lli(( (listimtiiiii 'rniii (/. jki rrirnni is ^^■^^\iU\ \)v rnUwv iWWi-
cull. It would tlu'M lu' ut'ccssjirv to ohscrvc tluit tlic I'cct of the
present species tire decidedly souu'wiiiit more clumsy and c<»vere<l
with courser linir, iind tliiit tliu row of Itristlcs on the upper sido
of the fore tihiif consists (»f somewhat h)njj:er ItrislJes. The con-
iormily of Itoth species in the structure of the antenniu mid of ilio
appeiidajics of the Iiypopyuriuiii is strikin}.f. (i. licrujalus cannot
he cont'oiinded with any other species.

11. <■. fretllll'llM LoKW. % and 9> — Oltscure viridisvelneneo-viridis,
itcimis iii^iis, fiicit! ft IVonle ex albo cineruis, pedibus flavis, lanu'Uirf

ai

liypopygii nigris.

Dark-grt't'ii or broiize-fjret'ii ; aiitenna> black ; face and front whitiah-gray ;
feet yt'How ; biiiiolbc of the hyi>oi)ygium black. Long. corp. 0.1-.

Long. al. (Mli— O.L'J.

Byn. <

iijiuinijiti lutts J'r<(jii(tii

LoEW, Neue Beitr. VIII, 32, 10.

IJlackish-jrreen, recently develo|»ed s])cciinciis ratlier hhiish^.
green, more aj^ed specimens darker l)roiize-};reeii. Face and front
covered with u whitish-<iray dust. Aiitcnme Itlack, the third Joint
(piite small ; arista with a short hut distinct puliescence. ('ilia of
the inferior orliit black ; upon the surface of the scutellum there
are, besides the two bristles, several short hairs. C(»Xii' and feet

}■

ellow ; middle coxjc almost (Ui their whole outside blackish, or

at least brownish ; the fore coxse show only at the extreme l)asis
traces of a brownish tinjre. such as is often also perceived on the
hind coxtc. The usual row of bristles on the upper side of the
fore tibiie is distinct and dense. The hind tarsi become, from the
tij) of the first joint, more and more brown, their tip is l)lack-
bntwn. The fore and middle tarsi are infuscated in a similar
inanner, but less dark. Cilia of the teji'iihe black. "Winsrs tin,u-ed
with blackish-g-ray, the third and fourth lon<ritiidinal veins with a
slijrht trace of convergency. The lainelhi! of the hypopyji'ium
black, (piite rounded at tlie end, fringed with black hairs ; the in-
terior api)endafres not bristly.

Ifftb. Middle States. (Osten-Sacken.)

Ohxcrralion. — Cf. j'iT</ifciif< is, among the kindred species, the
only one whose males have black lamella', and thus is easy to
recognize. Female siiecimcns occur which have the dust upon
face and front much whiter; in other respects they are like the

OYMNOl'TEUNMS.

SO

other fciiiiilcs. Wlictlicr tlicy iirt', as I suppose, merely ii viiriety
ol' (I. fni/iienn, or wlielher lliey Itelonjr to uuotlicr elosely re-
lale<l species cim only lie deteriiiiiied liy further ohservalious.
Tlie chaiifri'S in si/.i; of the present species arc nut so slrikih-:' as
Would appear from the measurements jj-iven aliove, hecause thi;
Iar<i'er specimens are always fenndes, which, in this species, more
than iismd exceed the nniles in size. It will he (piitc ditlieult to
(listingiiisli llio fcmule of (/. lunifcr from that of (,'. Jh'ijiuns.

]!2. €>. llliiifor liOKW. 'J, .— Oliseuro viridis vfl aenco-viridis, aiiten-
iiis iiii;iis, t'acio ut frontu ciiiereis, j)LMliliiis tlavis, lamellis liypopygii
obscaio liitt'i.s.

Daik-givcii or l)roiizo-grcen, aiitcniiro lilaok, face and front f,ray ; feet yel-
low ; lamellro of the liypopygiuiu dark-yellow. Long. corp. 0.13 — (i.l4.
Long. al. tM3— 0.14.

SvN. Gymiioptcnuia hiuifir LoEW, Neuo Ik-itr. VIII, 32, 11.

Dark-g'reen, rather hrijrht, face and front with wliitisli-jiray
dust. Antenna' rather short, entirely hiack, the third joint small,
not ntunded at the einl. Arista with a short, Imt distinct ))ul»es-
cence. Cilia of the inferior (U'hit Mack. Upon the sciilellum,
hesides the bristles, a few not easily perceptil)le hairs; the lamelhe
of the liypoi)ygium a little larjrer than those of the kindred species,
crescent-shaped, I)\it rounded on the ui>per end, so as to hecome
somewhat kidney-shaped, and thus to api»roach the shape of the
hunelhe of (/. .viilxJila/alK.s. They are of a dinjry hrowidsh-ycllow
color, and u|)on the u]»per maru'in somewhat hlackish. Their
black i'rinjro is not so strong: as that of <i. xiih(Iilrilii/ii.<. Furo
coxic dark yellow, a little brownish at the extreme basis ; the mid-
dle and hind coxne black almost up to the extreme tip. Feet
somewh it dark yellow, rather slender, hind femora somewhat in-
fuscated on the upper side towards the tip. The usual row of
liristles on the U))per side of the fore til)ia' is complete. 'I'arsi
brownisli towards the tip. Cilia of the teguliu black : wings tinged
with brownish-gray.

JJob. New York. (Osteu-Sacken.)

13. ii, finibriatllH Lorw. % . — Viridis, pedilms et coxis Havis, coxis
intt»rni«'diis, apice excepto, jiigricautibus ; appendiclbus hypopygii iiito-
rioribud clougatis et peuicillatis.

' ■ .J

w

1

^lii

?

- 1

1

ii

'

II!

■:i:

!^'V'

rl'-'lMmM

90

Uri'TKHA (»K N(»liril AAIKUK'A.

[I'AIIT II.

(in'j'ii, feet and rox.T jitIIow, Dm iiiii|<ll*t tosiv liowi'VfT, with the i'X(»*j)-
tidii of ilit> tii>, lil.-u'kisli ; tlio iiittM'inr m|)|i)'iiiI,'il;*>s of tli<* liviiopvgium
cloiicatol, liaiiy, |iiMiiiillat«!. I.oiiu'. corii. 'Mo. Long. al. 0.11.

Sv.N. (ii/Hiin'fiinniiinJiHihrifihis LoKW, Ncuo Heitr. VIII, ',i'2, 12.

Ilallicr liirlit-^M'ci'ii, liri^lit. l"'«cc tiiid Iniiit CMvrn'd with a
wliiti-;rniyi>li dust. Aiilcnnii! oiitin-ly l.lnrk, slmrt, tlio third
jtiiiit I'liiitidtMl. Arista with an ('.xtrciiicly sliort and vitv iinpcr-
«'c|itiltli' iHilK'sccncc. Cilia of llic iMlcridr tirl»it lthici\. 'I'lit' iippoi'
ti'iiU' of tlif tlinra.v niiMlcralcly Itrioht. r|iiin the sciitcllnni only
traces nf very iiniicrccptilth' liairs. 'I'lic hiiiicjhi' of the hy|)o|)yi>-iiiiii
whilish-yt-iluw, (Tcsccnt-shaiH'd, ciliated with stilVltlack hairs; tho
intcrinr appciKhijfcs somewhat ehmji-atcd, with a hnish-liko tnl't of
lonir hairs at the oiid. ('o.\iL' and Ici-l vi-ilow, inori' sli'inU-r than
those of the next foliowinff species ; most of the outside of the
middle coxu' Itlaekish ; tlie fore and hind coxa' hardly somewhat
lilackened at their oxtreme hasis. 'I'arsi somewhat infuscated
towards the tip, ('specially the hind ones. The usual row oi
bristles (>n the upjier side of the fore tiltia- is extant ; the sinfrlo
])ristlos of middle si/A'. Cilia of tho tegtdiu black. Wing.s tinjred
with trray.

Jiitfi. Maryland. (Osteii-Sacken.)

14. a. tleH|>ic(ltll» LoKW. %. — Viridis, nntonnis nigris, facie et
fioiiti' .•illiiilc-iKillinosis, pedibuH flavis, tibiis posticis jjropu apicoin supra
paulo lonuius pilosis, (luani in sjx'c^iehus ad quas acccdit ; alarun» vciiia
lonuitudinaliltus tertiilet quartfi subconvergentilius ; laiuellis hypop^-gii
pallide Have.seentibus.

Green, anlfiina' Vdack, face and front covered with a whitish dust ; feet
yellow ; Jiind tibije on the ui)per side towards the end with longer hairs
tlian in tlie allied species ; tlie third and fourth loiigitmlinal veins of the
wings show a slight couvergency ; lamella) of the hypoi)ygium pale yel-
low. Long. corp. 0.12. Long. al. 0.12.

Bvx. G>)mnoi>t(rnHn dcspicatus Lokw, Neue Beitr. VIII, 03, 13.

Green, ratlier bri<rht. Face and fnmt covered witli whitish
dust. Aiitenmv entirely black and only of inicMle lenji'th ; the
third joint lather rounded at the tip. Arista with a very
short, hardly perceptible j)ul)esconee. Cilia of the inferior orbit
black. U])on the scutellum of tho described specimen there are,
besides the two bristles, only a few small, pale hairs on the mar-
gin. Lamelhe of the hypopygium i)ale-yellowlsh, crescout-shaped,

^Bf-

UYM.N()I'TEUNU«.

n

friii^'cd on tlio luarjyin witli smtill hliick hnirs. Tho interior ap-
pcmla^jt's plain. Coxa' ami I'cct yi-Jluwisli, Middle cuxa' (tii tlii!
outside as far us soiiK-wliat licymid tlie iiddillr, l»lacki>li. 'I'lio
usual row of l)ristl('s ou the upper side of the loro lil>ia' is eoni-
plele, and consists »»f coniparalively larjfc Itristles. 'I'lie usual
Kliort liairs upon the last third of the upper side of the hind lilaa!
are not only a little denser, hut also visil)ly loiij>er, than in the allied
Hpi'cies. Tarsi towards the end a little lilaekish. Cilia ol' the
tefi'ida; black. Wiujrs tinp'd with jfray. Third and I'ourth longi-
tudinal veins towards the end u little nn»re appro.xinnited, and
Iherel'ore a little more converjrinjr, than in the allied species.
JIuh. Midtlle States, (Osten-Sacken.)

15. <rt. dlfllcills LoRW. %. — Viridis, nnti'imis uigris, facio et fronto
iilliiilo-polliaosift ; pcililms H;ivis ; tarsin apiceni versus diliite iiit'asciitis,
nlnruin vtuis longitudinaliluH tertia et 4U:irtil port'ecto iiiualli'lLs;
liiiaullis hyjiopygii i)iilliilo llavosuuiitilms.

Oruea, anteaiiiu l>liick, face ami front covered with a whitish dust, feet
yellow, tarsi l)ro\vnisli only towiinls the tij>, third and fourth Ion Uudi-
nal veins perfectly |iaralU)l ; laiaelhe of tho liypopygiuni iiale-yellowish.
Long. cor]). 0.12. Long. al. 0.12.

Sv.\. GijmHiiptirniix tlij/icilis Loi:w, Neuo Ueitr. VIII, li3, 14.

Is so extremely like the preceding' species, that the stutemoiit of
the dilVerences will l)e suilicient for its recognition. They consist
in the followiuf? : the usual row of bristles on the upper side of
the fore tiliite consists of much smaller bristles. The hairs o.i the
upper side of the hindtiliia* are, towards their end, less dense and
lonj; ; the third and fourth longitudinal veins are perfectly parallel
towards their end, and all the louyitudinal veins h-ive a i)uler
coloring.

JIab. New York.

1; I

16. fw. liigribarbUH Loew. J . — Nigro-fpnous, thorace cnDrulescente,
subopaco, Inferd faciei parte pilis nigris barliata.

Bronze-black, tliorax rather hlue and somewhat dull, tho lower part of tlie
face bearded with hlack hairs. Long. corp. 0.09 — O.lO. Long. al. 0.12.

Sy.v. Gymnnplernns iii</ril>arhiis LoEw, Neuo Beitr. VIII> 315, l.'i.

IJrouze-blackisli, th(jrax rather blue, and rather didl on account
of a dense, brown-gray dust. Face covered with a whitish-gray
dust, rather broad, upon its inferior portion convex and beset with

^l\

" "TO

1)2

DllTKUA OF Xoltril AMKItlCA.

[I'AItT II.

#PI

11 slinrt lint distinct, iiinl nitlicr slrikiiii; jmiIm'sccmcc. Aiitcn iie
siiiiill, l)liii-lv-lini\vii, sccoihI Joint iiiid tlic root nl' liic tliird red;
(lie lliird Joint rounded at the end and licsct with vcrv distinct
)inl not loULT hairs. Arista with a <"oin|iaralivclv lont;', very dis-
tinct |)nl»csccncc. The front seems in most directions liiiht.
hrownish-irrav ; in otln'rs nearly whitish. Cilia of the inferior
orliit ItlacU. rpiier side of the thorax rather l)lne a!id dull on
nccoiint of a li'ray-lirowiush dust. S<'nlellMm apparently jilahrous
upon its iip|»er snrfaee. The color of the alidonien vai'ies Itetween
Itronze-ldacU and hroiizc-irreen. Fore coxa' yellow-lirowiiish at
the liase; ndddle coxa- almost up to tlie tip, hind coxa' altont as
far as the middle, l)lackish. Feet yellowish. 'I'ar:;i moderately
infuscated towards the tip. The usual row ol' bristles on the
upper side of the foro tibia*, consists of comparatively short
liristles. (.'ilia of the tej^uhe black. Winu's with a rather stroiij^
blackish-ii-ray tinu'c. The third and fourth lungitudinul veins
j)arallel towards the eiul.
Ihtb. Pounsvlvunia,

17. G. iins'vicoriiis Lm-.w.

-Viridis, tlioraoe crprnloscente, iiiti-

|:pi!'--

ilissiiiio, oiitcniiis jiarvis, nigris, iirticulo Sfcii'.ulo ft articuli tcrtii l);isi
rulis ; coxis ;iiiticis totis, ]iiMlil)US(iue {>alli(U> Iltivis, tiirsis a|)iceni versus
iiiluscaiis. lanicUis liypopygii pallide tlavicantihiLs, appendicibus inte-
riorihus siiiiplicil)us.

Green, ilio V)luisli-grt'en thorax very liriiilit ; tlio small autenn.i> black, the
second joint and the root of the third red, the whole fore co.xa) iiiid the
feet pale yellowish; tarsi towards the tip brownish; tlie lamelhe of the
hypopypiam piile yellowisli ; the interior appendages jjlain. Long.
Corp. (>.12. Long. al. (1.12.

Svs. (ii/!iiiii>plt'nius parricnniis Lokw, Nene Beitr. VIII, 34, 16.

(Ireeii, brig-lit, fnce and front with a white dust. Antoinia^
small, l)lack; second Joiid and the root of the third red; third
joint remarkably small and m)t rounded at the tip. Arista with
a short but distinct i)ubesceuce. Cilia of the inferior orbit black.
Upper side of the thorax bluish-<ireeu and very bright. Uj)on
the surface of the sciitellum there seem to be, besides the usual
l)ristK's, a few small hairs. The small lanu'lhe of the hypopvji'ium
are whitish-yellow with a scarcely i>ercei»til)le bla' k nmr<i-in, cres-
cent-'^haped. Coxa* ami feet whitish-yellow; the middle co.xa^ on
the outside almost up to the tip, and the hind coxa; at the root,

■<i[

OYMNOl'TKKN'l S.

93

bliU'kisli. The hairs uii tlie loci iirc sciirccly sd r(in<;h as usual,
and the row of bristles on the upper si<h' of the fore tiliiii' consists
of rather shcrt bristles. 'I'arsi Init slightly inl'iiscatcd towards
tlicir tij). Cilia of the tcanhi' Mack. Wing-s with a Itlackish-jiray
tintrc. Third and lourlh lonji'itudinal veins, towards the end,
jKiraile!.

JIdh. Middle States. (Osteii-Sacken.)

Ohxi'n-aliiui. — Tiie sti'ikinji' resenihlance of this species to <!.
I,rri(i(ihis has already been noticed altovc. li' the snnUl bristles
on the upper side ol' the lore tibia- were not visibly shorter in (his
species, 1 would suppose it to l)c only a variety of (!. In riijahnf
with much paler tarsi.

IK

ij . iJ '"

t

'1'

► ''

■7*71

IS. 4a. opariis LoF.w. % . — Viridis, modico iiitcns, facie et froiite
pollino ex albo-cinci'i'o vcsfitis, ■'uitcimis iiiiijnsciilis, fiisco-iiiuris, f rti-
cnlo secmiilo et articuli tcrtii luisi lulis : jicdilnis I'uiii coyis tlavis ; cdxis
iiitt>niie(Uis, j).isticnruiii<iiit! l>asi iiif,'riiantilius ; alls c.\ llavo (lilHti.-<riime
cincr.ascontilius, Inincllis liyjxijjygii parvis, pallidy llavesceiitilius.

(irocn, only nioderntcly shining; face aTid front with a wliitish-gray dust ;
antenna* rather large, brownish-black : second joint and root of the
third red; coxip and feet yeilow, middle coxjp and the base of the hind
coxa' blackish; wings altogether pale yellowish-gray ; tlie small lamella?
of the hyiioiiygiuni palo yellouish. Long. corp. (1.1:2 — O.Wi. Long. al.
0.13.

Syx. (iijnmt ,><<'riiui^ ojxirns Loew, None I?eitr. VIII, 34, 17.

(i!re(>u, nidy moderately shiiUUff ; the dust ujiou the face s(>eins
to be whitish-<>-ray, but in an ob!i(pie lii>ht it has a more juiri!
white api»carance. Antenna' brownish-black ; second joint and
root of the third red; third joint of a considcralile size, rather
broad, foruiintr a sharp anu'lc at the tip, beset with not very lont::
but very distinct hairs. Arista with a rather short but very dis-
tiiu't pubescence. Front with a yellowish-u'rjiy dust. I'iliii of
the inferior orbit black. Thorax dull on account of a yellowish-
frray dust. I cannot discover any hairs upon the -fUtellum. La-
mella' of the liypopy,!;inm snudi, paie-yeilow, shoi't and sparsely
frinjred. Pleurtc witKnut yellow colorinir on tiie posterior mara'in.
Coxa* and feet ))alo-yellowish. Middle coxa' on tin' outside
almost up to the tip and hind coxio at the basis, of a dark color.
Tarsi hardly infuscated towards the tip. Cilia of the tt'u'idif
black. AVinys with a slight ji-ray-ycllowish tinge. The third

m

1. .■

ir: . .

94

DIPTERA OF NORTH AMKRICA.

[part II.

and fourth longitudinal veins towards their end almost entirely
parallel.

Hab. Xow York. (Ostcn-Sackcn.)

Obao.rvotion. — A sinji'le 9 whidi I possess I believe to be
that of the present si)ecies. Tiie circuiiistanee that the sinirlc
bristles of the row on tiie upper side of tiie fore tibia' are some-
what stroii«i-er, the third joint of the antenme mueh siiorter and the
arista more distinctly hairy than those of the above described ^ ,
connot justify any doubts, as the females of nearly all the species
dilVcr in tl)is way from the males. The only objection which mi<rlit
l)e raised ajrainst their be!oni>-in<>: together, is the more whitish
color of the dust upon Aiee and front.

19. a. politll8 LoEW. 9- — Viiidis, nitons, faciei albne parte infer^,
sulitilitcr pilosil, fronte allio-pollinosa, antennis ex fusco rulis, apiceiii
versus t'uscis, i:o.\is pedilmsijue palliile flavis, alis majusculis ex t'u^uo
cinereis, appendiuibus analibiis duabus styliformibus.

Green, briijlit, tbe lower part of tbe wbite face with delicate hairs, front
with a white dust, tlie brownish-red antennre brown at the tip; coxie
and feet pale-yellowish ; wings soniewlu't large, brown-grayish ; at the
end of tlm abiloineii two styloid appendages. Long. corp. 0.14 — 0.15.
Long. al. 0.14—0.15.

Syn. (lymnoptcniiis politus LoEW, Neue Beitr. VIII, 34, 18.

Green, very bright ; the moderately l»road face and front covered
with white dust ; tlie lowest part of the face l)eset with minute pule
hairs and a few biackish ones. Antenna\ at least for a female, of
middle size, dusky bntwnish-red ; third joint with short but dis-
tinct hairs, towanls the end blackish-brown nnd the tij) sharply
angular. Cilia of the inferior orl)it black. Thorax only a little
dusty. Ujjon the scutellum I cannot ])erceive any hairs at all.
The anal appendages distinguish themselves from those of the
related >i)ecies by consisting of two slnu't black styles. The ])os-
terior margin of the i)ieura! is not yelhuv. Coxie and feet ]»ale-
yellowish. Tarsi but little infuscated towards their tip. The
usual row of liristles on the upper side of the fore tibia) rather
prominent. Cilia of the teguhi' black. Wings rather broad and
])retty strongly tinged with brownish-gray. The third ami fourth
longitudinal veins towards their ends with a slight indication of
convergeiu'y.

Hah. New York. (Osten-Sacken.)

;•.^^

■'■■Alt

kM,'

GYMNOPTERNrS.

95

Ohscrrntion. — It is i'einarka))li' lluit tlio circle of sliort thorns oi\
the tip of the al)(h)men of the fciiiiiU', which l)eloii<rs to allit'(l spe-
cies, is wantinj^ here. Tliis species, liowever, cannot he located
in any otiier genus ; on tli(! contrary, it coincides most perfectly
in all other respects with the species of (ri/innoplcruun.

20. G. debiliH Loew. % and 9- — Viridis, niodice nitens, facie et
fronte cinereo-jioUinosis, autennis rufia apicem vjtsus iiigris, coxia pedi-
busijUti palli<le ilavis, alls ex llavo ciiRTeis, laiuelliii hypopygii parvis,
pallide flavesceiitibus.

Green, moderately shining ; face and front grayish-dusty, the red aiitenn.'B
black at the tip ; coxre and feet pah^-yt'llow ; wings yellowish-gray : the
small laniell;e of the hypopygium pale-yellowish. Long. corj). (i. 12.
Long. al. 0.12,

Syn. Gymnoptenius ilehilis Loew, Neue Beitr. VIII, 55, 19.

Green, only moderately shininp;; face covered with ^\hite-^•ray-
ish, front with yellow-jrrayish dust. Antenna' red, (»f middle size ;
third joint quite distinctly hairy, at the tip hiack-hrown and pro-
vided with a sharp angle; arista with a short, hut distinct puhes-
ccnce. As far as I can perceive, the ciliiu of the inferior orhit
are black. The upper side of the thorax, on account of some
yellow-grayish dust, rather dull. The scutelluin seems to he
hare. Venter not yellow. Pleunc wholly gray, without \< !low
posterior margin. Coxte and feet i)ale yellowish. Tarsi towards
their end a littl" >nfuscated. The usual row of bristles on the
upper side of t'lo fore iihuvi rather pronnnent. Cilia of the tegu-
lic 1)hK'k. Wi'.gs only with a slight yellow-grayish tinge. Third
and fourth longitudinal veins towards their end almost entirely
l»arallel. The small lamelhe of the hypoi)ygiuni are pale-yellow-
ish and frinjred with little black hairs.

Unh. Pennsylvania. (Osten-Sacken.)

Ohxcrration. — G. dchilix can easily be distinguished from
G. opdriiH ))y its smaller size and smaller antenna- ; likewise
from G. r7as>ii<'nuda by not having a yellow venter and the ]»os-
terior margin of the pleunc not being yellow. From (/. /loh'tna
it diOers by a more light-green color, less brightness, snmller size,
(fee. &c.

SI. <». crassicailda LoKW. % and 9.— Viridis, modioe niteiis, an-
tennis rufis apicem versus fuscis, pleurarnm margine postico, ventre,
ooxis pedibusque pallide flavis, hypopygio maris vakle incrassato.

^' Sri

M-k'/"

H 'i

■ i .

Wf

w

■i

96

DIT'TKHA OF NORTH AMKlUfA.

[part II.

Oreen, inodfiratoly shining ; tli»> red antcnn.'p lirown towards tlie tip ; the
jHistiTlor ntargin of tlm iilcUiJi;, tlie ventt'.', tin; ooxie ainl the I'ect i>ale-
yi'llowisli. The liyiioin-giuiu of tho ^ ,-vry niiudi thickened. Long.

Corp.

(1.1;

Li

il, 0.14— 0.1;

SvN. (jijiniiDjiti^rniis rrasslciiiida Lokvv, Neuo ]?eitr. VIII, ^.'J, 20.

(Jrt'cn, niodiTatcly sliiiiiiifT ; face and front with some whitish
dust ; ill wi'll itrcscrvcd 9 a dclieatc and imio-coiorcd pnbcsccnce

can

l)(; seen upon the lower Jiart of the fi

ice

Antenna' red, of

very iiu»derate si/e, the tliird Joint at the end r(»unded and infiis-
eatcfl. Arista of the J* with a short but distinct, that of the ?
with a comparatively lonjr and very strikinu* juiheseence. ('ili<i
of the inferior orliit black. Thora.x somewhat dull from {rrayish
d'ist. 'I'Ik! hairs U])on the scutelluin delicate and ratlier dilTi-
ciilt to i>erceive. ]Meura^ fi'ray, their whole posterior inaririii
(epimera inetuthoracica) yellowish. Venter yellow ; ujion the
anterior seirmenis of the ahdoineu this color extends somewhat
upon the upper side; in well preserved specinieiis, however, it is
c(Uicea]ed l)y a whitish dust ; in the 9 this yellow eolorinp" some-
times extends further, so that there is upon the first segment a
complete, and uixtn the second an interrupted yellow band. Coxa'
and feet ]iale-yeIlowish. Tarsi towards the einl scarcely a little

infiiscated. Cilia ol the tet-'iihe lilack. Win

with a s

liuhi

vel-

low-<rrayish tiiifrc. The third and fourth loiiii-itudinal veins to-
wards the end almost entirely jiarallel. The hyjjopyjriuin of the
^ uncomiiKuily thickened. The very small crescent -shaped lamelhc
liave a yellowish coloriiig and a fringe of short, delicate and sjjarse
hairs.

JJab. New York. (Osten-Sackcn.)

T

I

■'!

22. <w. niiniltllA Loew. % . — Viridis, antennis parvis rufis, pUniranmi
niart^iiie postico, ventre, coxis peditmsqne pallide flavioantihus, coxis
anticis denudatis, hypopygio non iucrassato.

Green, the small antennse red, the posterior margin of the pleura^, the ven-
ter, the coxa} and the feet pale-yellowish ; fore coxa) bare ; the hy-
popygium not thickened. Long. corp. 0.10. Long. al. 0.11.

Svx. (ii/mnoptert)Hs miniitus Loew, Neiie Beitr. VIII, 3.'), 21.

Green, quite In'ight, face with a dense, front witli a thin whitish
dust. Anteuiiii} browiiisli-red, small, the third joint at the end
dark-l;rowu. Arista with a short but distinct ))ubescence. Cilia
of the inferior orbit black. Thorax a little dull from a white-

PARACMIS.

97

•iravish dust. ScutclIuiM with u few sliort hairs. Posterior mar-

Vnitcr yellow. On the anterior sejr-
I n

jiiii of the i>leiira; yelhtv

iiieiits of the alxloiiieii the lateral iiiar<riiis are aL^^o eolored with
yellow, llypopyuiiim of the usual shape. The small, lieiieate
hiiuellic yellowish, sparsely ciliated. Co.xie and feet wiiite-yellow-
isli. The f<»re eo.xa* have upon their aiiteri(»r side no lilaek, I»ut
throughout oidy extremely (hdieate suiall whitish hairs, so as tn
appear frlal>rous, which constitutes a very strikiuff character of
tliis speeie.s. The tarsi towards their end are scarcely somewhat
infuscated.

JIah. .Middle States. (Osten-Sackcn.)

33. IrJ. ventral is Lofw. %. — Viriilis, modic. nitens, anteniiarnm
articiilo tiTtio latiiiscMilo, ri)tiiii lato, pleuraniin inarginn postico, ventre,
("oxis, |>i'(lil)us(jue palliile llavis, liypopygio iiiarid noii incrassato.

Oreo::, ••Kidcratel y shinintr, thinl joint of the antennnp rather broad, roiimled ;

posterior niarpin of tlie pifur.e, venter, coxa- ami feet pale-yeliowisli ;

hypopyiiiuin not thickened. Long. corp. OA'.i — (1.14. Long. al. O.l.').
Syx. (iiiiiiiKi/itrniiis vfiilnilif. LiiKW, Neue Ueitr. VIII, 3(5, 22.

Green, not very brij-lit. Face with a whitish, front with a pale
yellow-urayish dust. Antenna' brownish-red, of moderate size;
the third joint, which is risimded, is rather liroad ; arista with
a rather short hut distinct pid»escence. Cilia of the inferior
orbit black. Thorax (piite didl on acc(mnt of a yellow-frrayish
dust. Scutellum with delicate but distinct hairs. The entire pos-
terior mar<iin of the i)leura' yellow. Venter yellow. Ilypopyijiuni
of the usual forni. The small yellowish lamclhe of middle size,
rather sjiarsely ciliated. Coxa* and feet pale-yellowish. 'i'he
liair.s on the anterior coxa^ are ]»artially Ijlackish, but so delicate
that they mifrht be easily overlooked. The tarsi towards their end
are only little infuscated. ("ilia of the te<ruhe black. Wino-s
with a yellow-ucayish tiiiL^e; the third aiid fourth longitudinal
veins parallel towards their end.

Hub. Xew York.

Gen. IV. PARACLirS.

When I adopted, in the iifth part of the Nnir lii'itri'Kjc, the
f^enus G\jmno})li'rnu>t, and distin<ruished it from the relatecl
jrenera, it was done merely upon the basis of an invest i<ratioM (»f
European species, so that I had only these species in view when

7

08

DIPTERA CtF NORTH AMERICA.

fPART 11

;>

;■

■'

'■^

/,(

j\ '"

1 .

• ',

'1

i

1

■,'

1 defined the fharacters of this peiiiis and its differences from tlie
neif^lihoriiiff jrenora. America jiossesses species whicli necessarily
come within tin; ddinition of the jrenus (Ji/m))o/)tv?'n((n, as under-
stoud in tiiat i>ul)iication, but wiiich, at the same time, diller too
mucli from all oiher species of this frenus, to find a natural jduce
anion},' them. The most striking, although i)erhaps not the most
im])ortant, character wlscrel)}' these species differ from the others,
is the course of the 'ast scfrmcnt of the fourtii longitudinal vein.
At or Iteyond its middle it is suddenly deflected anteriorly, and its
enil is so near the end of the third longitudinal vein that the first
posterior cell a])pears almost closed. In order to separate these
sjx'cies fr(»m the genus (ri/mnoplemuti, 1 have added ahove to the
characters of GijmnojiternnH the complete, or at least nearly com-
plete, parallelism <,f the third and fourth longitudinal veins. A
more minute examination of the species in (piestion shows that they
should form two, or perhaj>s more correctly, three groups ; still,
before we are able to jut'ge with certainty about it, our as yet im-
perfect knowledge of the species will require a considerable in-
crease. In the m"antime, however, if we draw our attention to
the clnracter which distinguishes all these si)ecies from the other
fri/mu()}>fi'7')in>i, that is, to the course of t'^e last segment of the
fourth longitudinal vein, we will soon find among these s})ecies
two principal modifications of this course. In one case the deflec-
tion of the fourth segment at or beyond its middle takes place iu
a stt p curve forward, and the vein then runs in a straight direc-
tion to the margin of the wing, which it reaches very near tlie tip
of the third longitudinal vein. In the other case the last segment
of the fourth longitudinal vein forms beyond its middle a but
slightly rounded angle, and thence, in the form of a curve, ti.e
concavity of •liich is turned backwards, it runs to the margin of
the wing, which it likewise reaches in the immediate neighborhood
of the third longitudinal vein. Those species which show the first
of the above mentioned neurations, ])ossess, moreover, many other
characters in common, which distinguish them from the spev'ies of
GynDwptemm, and thus they form the genus I'riasfonevi'us. A^i
the most imi)ortant of these characters nmy be mentioned the
feathered arista, the broad face, which is c<»mmon to both sexes,
strongly convex upon its lower part, and provided with a sliarp,
curved inferior margin ; also the elongated and distinctly j)eduncii-
lated hypopygium. On the contrary all those species, iu which the

I'AKACI.irS.

!•'.»

end of tlio fourth loiiiritudinnl vein forms n enrve, tlie concnviry of
which is turned liiieivwnrds, and which in tliis respect dilVer more
tlinn tlie others froni the species of (Ji/mnoptcrnuK, i»p|»roach thci.i
very oh)sely in the structure of the face, and are easily distin<ruislied
on tluit account from tlie species of Pcldf/loncKy'iifi : tlie structure
of their face would be indeed altov:ether like tliat of the species of
Gi/mn()jilrr»>if<, if the face was not sonu'what less 'oroad and more
narroweu below. The structure of their hypoityirium also ap-
proaches more to that of the species (»f (ripnnojjtcr)iii>i, than to
yV/«x/o»c?/r?/s, the liypo})yfrium not bciufj eloufrnted aiul beinp^
provided with a shorter jtedunde, so as to appear sessile or almost
sessile. The outer ai){)endafres of all the species have more of the
usual form of a shell than those of the sjiecies of ri'l(ii</o)}riirii.<.
While there is a ^^reat uniformity with regard to all the above men-
tione<l clmracters, this is not the ease w'th the structure of the
antenna;. In both species, which I describe below, the third joint
(tf the antenuie is rounded and the arista more or less distinctly
hairy, but not feathered. In the species from. Surinam, which I
have descril)ed in the Wiener Entomol. Monafxrhr. as (Hi/mtiop-
ternua lenrospilns, the third joint of the antennas is loufrer, (|uit(!
distinctly excised on its upper side, and has, like the species of /'<•-
Jaftto)}('nn(f<, a distinctlv feathered arista. Whether this difjerence
in the structure of the antennic is sufficient to form two <j-enera of
these s])ecies, I am unable to decide, on account of the scanty ma-
terial at my disposal. l}ut I rather iiicline to that opinion. J>oIi-
chopus hcteropterw< Maccj. undoubtedly belonjrs to this <>roi,p. but
whether it is more related to the two species described below, or
to G. lt'i(coxpilHi<, cannot be decided without the comjiarison of the
specimen ; however, accordinor to the statements and the drawinj?
which Mr. Macquart furnishes of the structure of the antennif,
the former seems to be the case. Mr. Bijrot founde<l ujioii it a
separate prenus, which he calls Pararh'inx, and distinutiishes it
from the jrenus Gymnopternux by the latter having; the third joint
of tlie male antenna; sli<rhtly excised on the u])per side, niul the
fourth lonjritudinal vein bent, while in Paracleinx f'e third joint
of the male antenmc is not excised on the up))er side, and the
fourth lonpritudinal vein is strouffly bent. My experience dues
not, as yet, allow me to a<rree with this mode of sididivision ; I
therefore cannot adojtt the jrenus Parnclcius in the sense of Mr.
Bigot. Nevertheless, I see no inconvenience in reta'iiinji- tlio

V. -l'

■.■■\

'■• Ji

100

niPTEIlA OF NORTH AMKllICA.

[part II.

'|.':

newly coiiKMl name, with the usual latinizod inodifiration in Para-
vliun, for the new jxenus whieh I intend to estultlish and to define
here. As our prineipal aim at present is an availal>le {reiierie
distribution of the already known North Anieriean species, 1 will
merely have tiie latter in view in estal)lishin}r the characters of
J'ararliuK, and leave out G. leucox]tiluH for the present. The
discovery of a larj^er numlter of related species will have to decide
whether the character of raraclhi>t is to l»e modified so as to admit
species like G. leucuiipilus, or whether a new genus is to be founded
for such species.

The following are the characters of the genus : The (irst joint
of the antennie hairy on the upper siile ; third jtdnt of the antennie
rounded ; arista dorsal, with the ordinary }>ubescence, not feathered.
Face of very moderate breadth, narrowed towards the mouth, not
convex in its lower part and not reaching to the inferi<»r corner of
the eye. The lirst Joint of the hind tarsi without bristles. The
last segment of the fourth longitudimU vein, beyond its middle, is
bent forward in a rounded angle, thence running in a curve, with
the concave side turned backwards, towards the nmrgin of the
wing, and reaching it (piite near the tip of the third longitudinal
vein, so that the Hrst posterior cell has but a small opening. Hy-
po|)ygiuni entirely disengaged, not prolonged, with a very short
pedicel, so as to a[)i>ear sessile or nearly so ; the exterior ajjpend-
ages lamelliform.

The characteristic differences between Paraclius on one side
and Gi/mnoiifernux and J'elastoneurtix on the other, will be easily
understood from the foregoing. Besides the sj)ecies of the latter
two genera, there are those of the genus HercoKtomua, which re-
semble the species of Paraclius ; but in this genus the last seg-
ment of the fourth longitudinal vein only very gradually approaches
the third longitudinal vein, without any vestige of au angular
flexure, and reaches the margin of the wing not so near the third
longitudinal vein.

Only American species of Paraclius are as yet known. The
name of the genus (from napo — xXftu, I close), means that the flrst
posterior cell of the species is almost closed.

u

1 i *

PAUACl.irs.

lul

TdhJi- for the ileterminntlnn of thf S/nrirs,

r Arista with long liairs ; first si-gnn^nt of the costa not swollen.
I 1 arcuatuB /.»•.

I Arista with short liairs ; first segment of the costfi sfroiiiily swo'Icm,
I - albonotatuB, n. sp.

I)psrrijiti(>n of the Sperien.

1. P. arc'liatllH liOKW. 9' — Ol'scnre virliiij^, ju'dibus flavis, ex parte
fnsc'is, alls nigrican i)us, primo cost."!) seginento iion incrassato.

1 ark preen, feet yellow, partially dark-brown, wind's Mafkisli, first seg-
ment of the costa not thickened. Long. corp. 0.12. Long, al. 0.11.

Sy.n. Ptlastoneiirus urciiatus Lokw, Neue Heitr. VIII, .'5!), 4.

(ireeii, l)ritrlit. Face narrow, still narrower lielow, covered with
thick white (hist. Front jrreen, rather (hill IVoin u whitish (hist.
Anteiniie eoniparatively .sniall, bhick, tlie third joint nmndcd.
Arista witii coniiiarativi.'ly ittn<r liairs, hut not feathered, ("ilia
of the inferior ori)it whitish. The upper side of the tli(»rax is
upon the iirst two-thirds of a dark hntiize color and less hrijrht,
upon the last third of a ina<rniticent g'olden frreeu color and very
hriglit ; the triaufrnlar inii>ressiou on each side near the transverse
suture is thickly covered with white dust; a snudi sput in the vi-
cinity of the ])osterior c(trner of the thorax is dusted in a sinular
numner. In hxjkinir at the thorax from behind, a deep black
strij)e-like double s))ot above the root of the win^' becomes appa-
rent. Scutellnm rather bright, of copi)erish color with a jrreen
middle line. The extreme tips of its lateral corners are d«'ep
black, and the hairs on its upper side are jiarticidarly distinct.
Altdomeu brijrht, rather dark jrreen, alonir tli<' incisures blacker,
the lateral niarjrins of the single sefrmeiits with not very distinct
s)>ots of whitish dust. IMeune frreenish-black, and ratlier irray
fi'om a thin whitish dust. Fore coxie yellowish-brown, towards
the tip lighter; middle and hind coxie as far as the tip black.
Feet brownish-yellow ; fore and middle femora on the upper side
browni.sh, hind femora rather dark brown upon their wliole latter
l»art. Hind tibite, with the exception of the root, dark l)rown.
Fore and mi(hlle tarsi from the tij) of the first joint dark brown;
the whole hind tarsi blackish-browu. Cilia of the teguhe black.
"Wings blackened, towards the anterior margin darker ; the last
£<egment of the fourth longitudinal vein is suddenly bent forward

ii j^

r. '- i

: f?l

' ■^:i

; 1 1

I >

'■'t

'J

102

MI'TF.ilA (»r NdKTII AMi;UIl'A.

1

[I'AIIT II.

almost nt a riu'lit uiijjlc, and this scfjniciit t'i)riii.s u curve, (lio con-
vexity iif \vlii<'li is turned backwards.
Ilah. Cul.a. (I'ney.)

"Z, I*. allioiiotudlH, n. sp. % nml 9 .— Obxi-iiro viriilis, pi'ililma
totis iii^ris, iilirt iii^ricHiitilms, |>riiii() cont'n dixti.uo v.;l<l«) intrassuto.

Dark green, feet ei.tirely lilack, wini?i» blat'kish, the llrst <f),'ineiit <if (lie
I'tista very iiinch tliickened. LdUi^. corp. (1.17 — yK\H. Long. al. ('.IT.

I)ari\ frreen, sometimes rtiore i)roiize-,a:reen. i''aee of tlio %
narrow, of t lie 9 a little broader; in both sexes it is covereil with
a snow-white dust. J'alpi brownisli-i)lack. Antenna' entirely
black, of very m<iderate size, the third joint rounde(l ; arista with
the usual short pulM'scenee. Front covered with a rather densu
white dust. Cilia of the inferior orl)it whitish. Thorax dark me-
tallic ^M'cen, sometimes, with the exce]»tion of the posterior ]»arl of
the upper side, of a dusky bronze-color. 'I'he pleura' and the
trianjiuliir lateral impression on the transverse suture are covered
Avith a Itriji'ht white dust. Scutelium of the same color as the
uitper side of the tliorax. Al>d(imen on the posterior nnir^in of
the siny:le setrments usually rather blackish-blue-^'reen, upon the
remaininfr part of the seunicnts more golden-ureen or coppery;
rn the lateral nuirtrin covereil with white dust. Ilypopyfriuni
disenpi^red, sessile, ••■reenish-lthick ; Inmella' only of very moderate
size, rounded, brownish-l)lack. Coxte and feet bla< k, the former
covered with black hairs, the latter with a f>-reenish lustre ; fore
til>iie only with a simple row of bristles ; middle ami hind tibiae
with numerous bristles. Te<ridie blackish-brown, with black cilia.
WiufTS of imalerate size, of an olonji-iited-oval shape, blackened;
the last scfrment of the fourth loniritudinal vein al>out its middle
is bent forward nt an obtuse an^Ie, and its tip, which readies the
nmrjfin <piite near the third loniiitudinal vein, forms a curve, tlie
concavity of which is turned backwar(l>. In the % the portion of
the costa which lies before the end of the first longitudinal vein
sliows a very stron*; swelling; ia the 9 this swelling is mueli
weaker, Imt still of a rather conspicuous size.

Hub, New Orleans.

PKLASTONtl HUM.

103

Uen. V. l*KI.AMTO.\i:illl !4.

The characters of the jfcniis arc the lonowiii^j : First joint of
the uiiteiiiiti! short, hairy on the nppcr side; tliinl joint roinuh-*! ;
arista dorsal, ilislinct I) fealhered. Face in both sexes coni|)ara-
tively broad, upon its lower |»art stroii;ily convex; its lower
unir^in is sharp, and t'ornis a curve. I'mhoscis stouter thxn in
(.ti/nniojilrnius, and approaching- in its structure the species of
Mrilrlcnis. The lirst joint of the hind tarsi without lirislles.
The last seg^nu-nt of the fourth lonjiiiudiiial vein turns forward at
or beyond its middle in a stron;; curve, and runs tlu'ii almost in a
strai^'ht line towards the nnirgin of the win^, which il reaches
closely in the vicinity of the tip of the third lon<j:itudinal vein, so
thai the lirst posterior cell is ahuost closed. 'I he hyj)npyjriuin
■IS entirely disenj^ajicd, very much eloiijinted, pednncnialed, with
lamelliform bhu-k a)>pendajfes, which, in most of the species, have
a very elonpited form, and are of a more solid suiistanee than in
the allied jfcnera.

The next related jrenus is I'arncliiis. The diiTcrences of both
have already been detaile(| alxtve. J'tlunlom-urus can haruly l)e
mistaken for any other jrenus.

As yet, only American species of Pi'los/oncurKx have been
made kin»wn. Amoufj; the species describ- d by former authors,
Dolit/iopus UKiriih'ju'ti Walk., and />. hi/'rons Walk., seem to l»e-
lonij here. The name of the jienus (from nfXaSi«, I approaeh, and
vivfioii, the nerve) has reference to the position ami the peculiar
course of the last segment of the fourth longitudinal vein.

'')■

2

Tithle for 'lie detennimittoii of the Speciis.

Cilia of the infi-iior orliit lilatk. 2

(.'ilia of tiiH inft'rior orliit jiale. 4

Thorax with a largo siM)t of wliite dust on the posterior margin.

1 longicauda /.«•.
Tliorax witliout a spot of white dust on the posterior margin. H

Wings l)htckened. 2 lugubris f^w.

Wings gray. 3 laetus A«'.

Fore coxie lilackened at the basis. 4 vagans /.«•.

Fure cuxic uut blackened at the basis. ^ cognatus A'^'.

■^TTTTr

104

IMPTKIIA UF M»KTII AMIillK'A.

[I'AUT II.

Si/ntimiilic arroiiyemtut uf tht S/ticitt,

I. Cilia of the inffrior orbit Itlack.

1. longloauda At. D. laatus f.u:

'^- lugubris Aw.

II. Cilia of the inffrior orltit pal').
4. vagans Lw,

ft. oognatui /.w.

/trsrn'/itiiiti of ihf S/itriis,

I. Cilia of tiik infkiiior ((Hhit ulaik.

1. P. loilfflt'aillla I-oKW. %, — A«'iUM)-iiii.'(T, I'iiciH arct'iitco niicantp,
Hul) aiittiuniii triuugulum ni^TUiu i^urt-iittt, ciliis ouulurum iuluriurilui!)
iiigris.

Hroiize-Maik ; face with a Hilvery liistri-, witli a Maik trianu'iilar fpot
UDilfr the aiiteniiif ; uilia of tiio iiil'oiior orbit blui^k. Long. corj). I). 17.
Loiik;. al. 0. hi.

Sy.n. i'vlastoneuina lomjlcunda LoBW, Neue Heitr. VIIF, 37, 1.

Face, fur a %, extrciiu'ly broad, the inrcrior two tliinls of it an-
stroll;;!}- convex and liave a brijflit silvt'ry-wliito ivlli-ctioii, wliii-li
sliows a suUR'wliat olive-brown a|>))('araiice only in a ct-rtain oi»-
liqiK' li;:lit ; tlio ui»|tL'r, flat jiortiuii (»f tlie face lias in each lower
coviier a deep, triaii^rular spot with a silvery lustre; that trianu'ii-
lar part of it, which is not covered l)y this spot, appears deep-
Ith'ck, when seen from altove ; seen frtjiii lielow, it appears less
dark and somewhat dusty. The lower marjrin of the face is very
sharp. Palpi larjre. on the outside with a silvery-white lustre
ar.d covered with black hairs. Front shiniiijL!; blackish. Anteniiie
brownish Idack ; the under s'ide of the first and second joints
brownish-red; the rountlcd third joint rather laru'c. Arista
rather short, very much thinner towards the lip, and upon the last
two thirds feathered with short hairs. Cilia of the inferior orliit
black. Thorax bronze-black, rather shiiiinii:, with an almost imi»er-
ceptible white dust ; the upper side of the thi>rax shows live spots
covered with snow-white dust, namely one on each side near the
transverse suture, one in the shape of a dot, on each side above
the root uf the wing near the posterior corner, and iinally a hirjje
triaufruhir spot iu the middle of the hind margin; the velvet-black
strii)e-like double spot immediately al)ove the root of the wiiigr,
j-o common in the species of this genus, is very distinct here.

■"'>

PEr.ASTONEiniB.

105

Toxir nnd pli'iinu bliK-k, with a Hilv«'ry liistro. Sculilliui* with
vi'lvi't-hhiclx lati-ral spots niid with a Vfivt't-lthifk inii|tllt'->tripf,
sinuotli sti'cl-liliu' lit'twi'cii the cnriicrs and tiic niiddli' si ripe. Ali-
(iMiiifii with a viidct lustre. ]|yp<ipy^:iiiiii Idark, upon the under
siije covered with siiow-wiiite dust, peduiieuhited, not very stout,
hut very htn^, so that it reaehes as tar as tlie Itasis of the alido-
inen ; tiie eouiparatively sinalMauielhi' hrownish-lihiek ; the inte-
rior appeiidii^es sh>n(h-r, black, provided at the tip with not very
numerous hut lon^ hairs in the shape of a hrush. Feet hrownish-
yellow, hind t'eniora hhickened on the upper side of the extrenie
tip; the liristles on the upjter side of the tihiie are inserted upon
irreirular small hlack-hrowi: spots; tarsi dark hrown, paler at the
hasis. Cilia of the tejfuhe hhick. Win>is comparatively small
and narrow, tinjred with hiackish-gray and darker towards the
end (d' the anterior nuirgin.

Jlolt. New York. (Osten-Sncken.)

Olwrrafion. — 'I'lii' ])unctation of the tihiie may remind one of
Jhilii/iojiiift )n(ii-ulijK's Walk. This species is descrilied as only
one and a half lines long and hronze-green, and with all the
femora having Idack tips. \o mention whatever is nnide in .Mr.
Walker's description of the very peculiar structure of the face
and id' the striking white spots on the thorax, which are peculiar
to l'il(istum'(trKf< Inm/irdKih. Under such circumstances thu
ideiitilication of these two species is impossilile, the more so as all
the species of J'l l(i)<fit)n'i(nis are very much alike and as the spots
on the tihiu' are a character which fre(piLntly occurs in this genus.

! tr4h.

i(.

'2. I*, llipilltris LoF.w. 9. — Niirer, tliorare fusco-pollinoso, ojiaco, liliia
ocuhiruiu iiifciiorilias iiitiris, alls iiiuiicantitius.

Black, tliorax covcrtMl with brown ilust, dull ; cilia of the inferior orbit
black; winiis blackish. Lone. eoip. O.ll. Long. al. (».10.

Syx. J'^la.ttiiiifiirKs lii'iiilirl.i Lokw, Neue Keitr. VIII, 38, 2.

IMack. Face hlack, with a whitish, not shining dust, and with
a hlackish-l)rown, not well delineil middle stripe; upon the larger,
iid'erior part hut moderately convex. Palpi rather large, hlack,
on the outside with a thin whitish dust aud hlack hairs. Front didl,
hrowidsh-hlack. Anteniiie reddisli-hrowu, the hasis of the lirst
and the larger ]>art of the third ji)int hrowinsh-hlack ; the third
joint i.s small and rather rounded, beset with short hut distinct

'l!:i

106

Dll'TLIlA OF NORTH AMKUICA.

[part ir.

haws. Arista towards tlio tipluathcretl with shorthairs. Cilia of
tJR' inferior orbit black. The spot on each sidf near the transverse
suture *tf the thorax is covered with white dust, however this dust
is Mi)t distinctly seen in every direction ; the usual d(ej)-ldaek
stripe-shaped double spot ininiediately above the root of the wing
bcconies distinctly visible, when looking at the thorax from be-
hind ; likewise the usual little white spot in the iieighljorhood of
the hind corner is sehh»ni distinctly seen and is always very small.
On the posterior margin of the th<»rax there is no spot with white
dust. Scutellum bluish-black with velvet-black lateral corners,
ill well preserved specimens there is a miildle-stripe with grayish-
white dust. I'leurte black, giiiy t)n account of a thin whitish
dust. Al)domen bronze-black, each segment on the lateral margin
with a small spot covered with white dust and not visil)le in every
dire<'lion. Fore co.xiu brownish-yellow, with an almost imper-
cepliljle, very thin covering of white dust. Middle and hind coxa'
black. The color of the feet is rather varial)le ; usually they lu'o
yellowish-brown, the upper side of the anterior femora, the tip of
the hind femora, likewise all the tibiie atid tarsi bhick-brown ;
111' vert heless there are si)ecimens in which they are more of a
brownish-yellow color and where the tip of the femora and the
tarsi, with the exception of their roots, are blackish-brown, while
the upper side of the tibiie is indistinctly sjxjtted in consequeiict!
of the brownish color of the places of insertion of the bristles.
Cilia of the teguhe black, llalteres blackish. Wings rather
small, narrowed towards the bnsis, distinctly blackened, darker
towiinls the iinterior nnirgiii ; in more faded specimens dark mar-
gins appear around the veins, as is also the ease ia the other
species of the same genus.

Jlab. Trenton Falls, >'. V. (Osten-Sacken.)

3. I'. Ijrtlis Lt'Kw. %. — Viriili><, ciliis oculoruin inforioribua nigrLs,
tidiiti- ft ilimidio tlioracis i)ti>:t'.'rioie violaueis, alis ex fusco cinereis.

Cii'Hii, lilia of tiie inferior orbit l)lack ; front and hind part of the thorax
violet ; wings brownisli-gruy. Long. corp. O.l'J, — 0.13. Lor,j al. 0.1-
—(MS.

Svs. J'lldstuiimnis h'tug Loew, Neuo Beitr. VIII, 38, 3,

l)!irk-gr<'en, rather shining. Face considerably l)road and
covered with a dense snow-white dust, the inferior third convex.

PELASTONELRrS.

101

as

l'al|)i of moderate size and y(!llt)\visli color, covered on the outside
witli snow-wliite dust. Antennse yellowish-red, thf third joint a
little lonjrer than broad, at the tip altogether rounded, its apical
half hlackish-hrown ; arista towards the tip rciillirrid with short
hairs. Cilia of the inferior orl>it hlack. Front violet, soinetiines
almost steel-l)lue. I'ltju'r side of the thora.x jrreen with a thin
gray-brownish dust, ujton the larger portion of the posterior part
violet ; the spot on each side of the suture is covered with white
dust ; the usual deep black, stripe-shai)ed donble spot, immedi-
ately above the root of the wing is very distinct ; thf small dot
of white dust in the vicinity f tlie hind corner, however, is seldom
distinctly visible ; on the posterior nuirgin of the thora.x there is
no spot of while dust. Scutellum shiidng black-green with deep-
black lateral corners; oidy in faultless specimens there is a middle
stripe of white-grayish dust, surrounded by a more black c<»lor-
ing. IMcuriC black, gray on account of whitish dust. Kach seg-
ment of the abdomen has on the lateral margin a spot of white
dust, wiiich is not very sharply deliiied, and the sixth, snndl seg-
ment, is entirely covered with whitish, dust. llyiKipygium shortly
])edunculate(l, greenish-black ; on the under side; gray from pale
dust; it reaches with its tijy as far as the middle of the abdomen;
the long browidsh-black lamelhe are luirrow, at the end gently bent
upwards, reaching the basis (»f the abdomen; the slender interior
ai)pendages are also blackish-brown, beset at the tip with a few
long hairs. Fore co.xte yellowish, middle and hind coxa; blackish
almost as far as the tip. Feet i»ale-yellowish ; the tiji of the hind
femora is not of a dark color, and the bristles on the upper side
of the tibia; are not inserted on dark sjiots ; middle and hind tarsi,
with the except ion of the roots, black-brown ; fore tarsi brown
oidy at the tip. Cilia of the teguhe black. Wings with a more
lu'ownish-gray than blackish-gray tinge aiul darker towarils the
anterior margi.i.

Ikib. (Jeorgia; District Columbia. (Osten-Sacken.)

m

fA

II. Cilia of the infekiok ounix i'ale.

4. P. varans Loew. % mid 9* — ^l>f'iiii'« viridis v»'l JiiL'ro-spnens ;
aiiteiUKiruii: basi iiita, ciliis oiulorum inteiioribus pallidis, coxis aiiticis,
excejito apice, nigris, alls cinerei.s.

Dark-green or bronze-black ; the root of the autenuae red ; cilia of tlie iu-

.i

1.

■ f

>

1C8

PIPTKRA OF NORTH AMERICA.

[part 11.

•'•rr

ferior orbit pale ; fore coxve with the exception of the tip black ; wings
gray. Long. corp. 0.14— O.lf). Long. al. 0.15.

Syn. J'clastoneiirus vugaiis LoBW, Neue Beitr. VIII, 39, .'5.

Dark-frrcoii or Jilackish broiizo-colorcd, moderately sliiiiiiifr.
Faee broad, with a snow-white dust, in the 9 with a broad {trav-
Itrownish middle strii>e, which is wantinj; in the J' ; its lower part
convex. Palpi rather larjre, ])lackish, yellowish at the ti)), on the
outside covered with a dense snow-white dust and black hairs.
Front covered with a brown dust, sel(h)ni entirely ooneealiiifr
the jrround color, which is steel-blue, excejjt in the vicinity of the
upper corners where it is violet. AntenniL' not very lonjr, the
third joint, however, which is rounded and distinctly hairy, is
rather larjre ; their C(dor is red ; the up|)er side of the first and
the greater part of the third joint are black-brown ; sometimes the
upi)er side of the second joint has the same color. Arista feath-
ered with rather long hairs. Cilia of the inferi(»r orl)it whitish.
The color of the upper side of the thorax, in recently excluded
specimens, is more jrreen, and shows then two lonu'itudinal lines
of a violet color, which increase in breadth backwards and become
visibly divergent ; in more faded si)ecimeiis this color is more dark
lironze-black, and of the two violet longitu<linal lines oidy the
hind ])art is often ])erceptiblc, which then l)ecoines more extended.
The s])ot of white dust on each side, near the suture, and the usual
deep-l)lack double sjjot immediately above the root of the wing, are
very striking; ujwn the hind corner, which is of a brighter green
color, there is a spot of white dust in a diagonal direction ; how-
ever, it is very dillicult to perceive. The extreme tip of the lateral
corner of the scutellum appears black, the elevated middle stri))e is
usually green, and the slight depression on each side of the latter
more bronze-colored. I cannot perceive any hairs u])on the sur-
face of the scutellum. Abdomen bronze-green, often somewhat
copper-colored ; the white dust in the vicinity of the lateral mar-
gin does not form any distinct spots. Coxte lilack with a bright
snow-white lustre ; fore coxie yellow at the tip to a rather large
extent, the middle and hind ones oidy to a very small extent.
Feet somewhat brownish-yellow; fore tarsi only at the tij), middle
and hind tarsi from the ti]) of the first joint, blackish-brown. Cilia
of the tegula3 black. Wings in recently developed specimens
slightly tinged with gray, in faded ones visibly darker. The

m ^

I

a'H'' ■!'■

MS- :J

viil

TACIIYTRECIIIS.

100

clonjralcd niul slondorliypojjvjriuiu is pcdunoiilatod and of a black
color; tilt' loiifT and narrow laniclke are ttf an c(|nal breadth, black,
iVinircd with rather lon<r black hairs; the interior a[tpendages
small, without hairs at the tip.

llnh. .Middle iStates. (Osten-Sacken.)

5. P. COKliatlls LoKW. 9 . — Oliseure spnens, anteniiarnm rufarura
apice fiisco, filiis oculoiuin inferioribus pallidis, coxisaiitiris totis" Davis.

Dark broiiEH-colored ; the tip of tlie led aiitennte brown ; cilia of the in-
ferior orbit pale; fore coxis entirely pale. Long. corp. 0.15. Long,
ab 0.15.

Of this species 1 know only the 9, which is a little larger than
that of the precediiij; species, and is distinguished from it by the
]»:iler antennje, by the hairs of the feathered arista being a little
longer, l»y the dejjression on each side of the suture of the thorax
which is dusted with white only in the interior corner, and l)y the
entirely yellow fore coxa). The specific distinctness cannot be
called in doubt.

JIab. Middle States. (Ostcn-Sacken.)

Gen. VI. TACIIl'TRECIirS.

The vertical diameter of the strongly pubescent eyes is very
large, and, on that account, the head very high. The face is com-
paratively narrow, l)ecomes gradually broader towards the mouth,
and reaches altogether the lower corner of the eyes. I'al|)i of very
moderate size, also in the female. The first joint of the antennse
hairy on the ufiper side ; the third joint of moderate size, rounded
or ovate. Arista dorsal, with an almost imperceptible microscopic
jniliescence or apparently bare. Cilia o*" the whole orl)it particu-
larly h'lig. Feet rather slender ; femora not very strong; the fore
femora towards the basis a little thickened. The first joint of the
hind tarsi not bristly. Wings comparatively small ; tlie last seg-
ment of the fourth longitudinal vein converges gradnally towards
the third longitudinal vein, so as to reach the margin of the wing
only at a moderate distance from this vein and l)efore the tip of
t'.ie wing; upon its middle there is a more or less distinct flexure,
wiiich is sometimes more considerable in the ^^ than in the 9,
but is never very strong. The hypopygium is entirely disengaged,
with lamelliform rounded exterior appendages of moderate size.

I
'i

no

DIPTERA OP NORTH AMERICA.

[part II.

Tilt' lial)itns of the spocios bcloiifriiijr to tlio fjoniis Tarht/fm-hiis
is vt'i'v |M'culiar, so tliiit tliey caiiiiot be easily mistaken or eon-
founded -with speeies of another jrenus. It is dillisult to jrive <in
adeipiate exju'ession t(» such jteeuliarities of the habitus in the
eharaeteristie of a fi-enus. All that has been said above about the
]>eculiar structure of the head, deserves in this respect especial
attention. A i)articiilar mark, which distinjruishes the jyenus
Tacln/hrrhufi from all the other related jrenera is, that the face
reaches as far as the inferior corner of the eye.

Tlie sjtecies of 7'ncfii/'frcrhii>i known at present ai'c found in
K.irope, Asia Minor, Africa and North America.

The name of the «renus (from raxvt, rai)id, and rp(%io, I run),
has reference to the habit of many species to run along sandy and
muddy banks.

Table for the (htermliialiim of the Sj)ecies,
( Antennae for the most part dark yellow. 1 moechus /.»•.

2

t. Antennio altogetlier black

( TibifB brownish-yellow almost to the tip

I. Tibiie black, with a gieenisli reflection.

2 voraac /-«•.
3 angustipennia Lie

fpi/Htew(it!c tirnirKjement nf the Spr.cies,

. I. The second joint of the aiitennse rudimentary,

1. moechus Lw.

II. The second joint of the antennae of the usual structure.

2. voraz Lw. 3. angustipennis r.w.

Descriptltni nf the Sjiecies.

I. The sepoxo .toint of tiik antennM'^ ri'Dimentakv.

I. T. inoeclllli^ LoEW. % and 9- — Viridi-aeneus, anteiuiis maxima

ex jiarte tlavis.
^ . Set» antennalis tenuissimie apice in lamellam atram dilatato, pedibus

llavis.
9 . Seta anteunali simplice, pedibus nigro et testaceo variegatis.

Bronze-green, antenn.-e mostly yellow.

% . The tip of the very slender arista enlarged into a black lamella, fett

yellow.
5 . Arista simple, feet partly black, partly brownish-yellow. Long. corp.

0.24—0.2(5. Long. al. 0.22—0.23.

Svs. Tnchytrechus moechus Loew, Neue Beitr. VIII, 40, 1.

:. ■'■- ^ "■! •* r

■ . ii:

TAniYTttEcms,

111

JA//c. Fnc(! very loiisr mid narrow, more hroad helow, nliiiost
frol(k'ii-y('ll(»w, lint without any lustr<\ I'alpi small, Ithickisli.
AntenuiL', in conscciufnce of the ru(lini<>ntary condition of the
second joint, apparently two-jointed, aj< in the nial<' of the
fronns JldHrn'rmi.'^ : the first joint elonjrated and somewhat
swollen, of a brijrht dark-yeljow, hare on the under side, on tiie
up|)or side covered witii hiack hairs; the rndinnMital second joint
of the same color; the third joint also extremely snndl, rounded
or somewhat kidney-shaped, hrownish-black and only at the root
yellow. The arista very slender, bare, half as lonjr as the tiiorax
and abdomen taken to<retlier; it is black, oidy at the extreme tip
white, and ends in a small, deep-black, rather rounded lamella, which
is white at its extreme, somewhat attenuated, basis. Front nu'tallic-
green, rather without lustre, covered with brown-jrray dust, which
is oidy visible when viewed fmm the side. Cilia of the ]»osterior
orbit black al)ove, yellowisli below. Tlun-ax metallic-prccii,
usually with a more bronze or coj)per-colored or even violet mid-
dle line ; it is rather shininir, covered, however, with a distinct
browiMsh-yellow dust. Scutellum ai'd abdomen have the same
color and dusted covering. ]Iypo]»ygir.m pedunculated, black,
ni)on the lower side more black-green, and covered with yellow
dust ; the yellow, rather rounded ianielhe with not very long Idack
hairs. Pleune with a covering of thick dark-yellow dust upon
bronze-green ground. Fore cox:e bright yellow with almost gol-
den-yellow dust, without any lustre an<l with some delicate sparse
black little hairs. Middle and hind coxie blackish, gray on ac-
count of a yellowish dust. Feet l)right yellow; middle and hind
tarsi from the middle of the iirst joint brownish-black: fore tarn
ahnost impercej)tibly flattened ; in a certain direction they show
a bright snow-white lustre, which reaches as far as the root up(>ii
the fore tibise. Hind femora liefore the ti]» with a single Itristle.
Cilia of the teguhe black. "Wings tinged with gray. Tlie tip nf
the fourth longitudinal vein is nciii" the tip of the third.

Fcninle. It differs renmrkalily IVnni the male in color. Fare
very narrow for a female, a litth- broa<ler below, pale gray-ycl!ow-
ish, seldom white-grayish, and then at least upon its inferior jpart.
yellowish. Pali)i snndl, l)lackish. First joint of tin- antenna'
nmch smaller than that of the male, less swollen, and moi'c of a
reddish-yellow color; the second joint of the sann' color and !( ^s
abortive than in the male ; the third joint a little larger than ii;i;l

•t

t

112

DIPTKIIA OF NORTH AMKIUCA.

[part TI.

il'liffi

i

■ it

•• "t \ ■^ ?

6;n

of tlie inulc, bro\vnish-l)luck, riMUlisli-yt^lIow only on the inferior
side of tlie ))i»sis, rounded. The liitiek arista ]»lain, hare, ffradiially
thinner tctwards the end. Front and cilia of tin; jxisterior orl)it the
same as those of the male. Upper side of the thora.x less preen,
more hronze-eolored, the dust more brown, and the middle line,
which is of a dilferent color, more distinct. The alidonien is more
of a bronze color ; the dust upon it, however, is rather whitish.
The dust on the jdcnra; is also more whitish than yellow. The
fore eoxie are likewise blackened as far as the e.vtreme tip ; femora
green-black ; their lij) to a considerable extent with a yellowish-
brown tinge, which extends further on the lower side than on the
upper si<le ; hind fenntra Itefore the tip only with one bristle. Fore
tibiie usually brownish-yellow, with a very thin whitish pruinose
covering ; fttre tarsi black, with the exception of their c eme
basis. Middle and hind tibia* usually dark brown, with yellowish-
brown basis and with black tip. ]Iind tarsi brownish-black. Cilia
of the teguhe black. Wings clouded with blackish-gray.

Hub. Trenton Falls, X. Y. (Osten-Sacken.)

Obticrvnfion. — A genus, based upon the jtresent very remark-
able species, would be entitled to the same claims as the genus
I[alh>rire}-u.<, with which it nearly coincides in the structure of
the antennai. I consider the estal)lishnient of such a genus as un-
necessary, as this species agrees in all other respects with the
already known species of Tac/ii/lrvchus, which, however, are as
yet not very numerous.

II. Tr/E SECOND JOINT OF THE ANTENN.E OF THE USUAL

STiaCTUUE.

3. T. vorax Loew. % and 9 • — -^neus, aMomine seneo-viridi, anten-

nis pedibusijue nigris, fenioruin apice tibiisque prteter apicem flavia.
% . Apioe alarum guttil caiidiild niaiulaque adjectd alia ornato.
5 . Ali.s immaculatis.

Bronze-colored. al)d()inen bronze-green, antennre and feet black, tip of
femora ami tbe tibi;i>, with the exception of the tip, black.

% . Tip of the wings with a snow-white drop, and with an adjoining deep-
black spot.

9 . Wings spotless. Long. corp. 0.26— 0.27. Long. al. 0,23— 0.24.

Syn. Tachytrechiis vora.v LoEW, Neue Beitr. VIII, 41, 2.

Face narrow, but considerably broader than that of the jircvious

TACIIYTUECIirS.

113

f!))(>('i('s, bnmilcr iiifcriorly, in hotli sexes covered witli a ymlo yel-
liiw (lust, and without lustre. J'aljii small, l)Iaek. Antenna) of the
usual t'orin, Itlaek. Arista in l)oth sexes i)Iaiii and Itaro. Front
covered with a dense yellow or l)rown dust. Cilia of the jiosterior
orbit above black, below white. U])]»er side of the thorax with a
gray-yollowish or l)n»wnish-yellow dust upon a luetallie-frreen or
partially co])i>er-coli)red and lustrous frround, very dull. The
seutellum luis a similar colorinjr, still its ground color can some-
times 1)0 distinctly recognized. Abdomen green and coppery,
dull with a gray-whitish <lust. Pleura^ and coxa^ grayish-green,
on account of a whitish dust upon green ground. Femora dark
metallic-green, thinly pruinose with whitish, their tip brownish-
yellow ; liind fenntra before their tij) with a row of four bristles;
tibiio browiush-yi'Uow ; the tip of the fore and hind til)ia' blackened,
tl.e tip of the middle tibiie usually only l)rowii. Tarsi Idack, ])laiii
also in the male; the fore tarsi usually brownish-yellow only at the
extreme root, the middle tarsi, however, brownish-yellow up(tn the
lirst half t»f the first joint. Cilia of the teguhe black. Wings of
the male narrow, hyaline, scarcely tinged with gray, at the tip with
a small spot, the first two-thirds of which are deei)-black, the last
tliird, however, ajipears snow-white when seen against tlie light.

ings of the female not quite so narrow as those of the ^, dis-
tinctly tinged with gray, with a slight dark shadow around the
hind transverse vein. The end of the fourth longitudinal vein in
both sexes is less approximate to the end of third longitudinal
vein, than in the previous species. The short jx'dunctdated hy-
popygium of the ^ is black, upon the inferior side more greenish-
black, but gray from a pale dust; the lamelhe are black, of mode-
rate size only, rather rounded, and covered with black hairs.

Bah. District Columbia. (Osten-Sacken.)

'

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pf

3. T. ansnstipeniiis Lorw. %. — Viridis, antennis niu'i-is, ppftil)U3
totis ex viridi uigris, alls iiuiiiaculatis, basim Vfisus attemiatis.

Green, anteiinre black ; the whole feet greenish-l)lack ; wiusrs spotless, nar-
rower toward.s the l)asi'i. Long. corp. 0.22. Long. al. (Ml).

Syx. Tiichijtrvihus (ingustijxinils LoKW, Berl. Knt. Zeit. VI, 213, ()4.

Green and but little shining, on account of being rather densely
covered with a fine dust. Palj)! black, with a gray-yellowish
dust. Face pale, oehre-yellow, dull. The rather small antennae
8

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diptf.ua op north amfrtca.

[part it.

-.Si;

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liliH'k. Front dull from ln'inj; rovcrod witli an opliro-yollow dust.
Ciliii of tho lateral and inferior orltit whitish. The ui)iH'r side of
the thorax is eovered witli a frrayish ochre-yoUow dust, so as to
make the frreen ^n-ound eolor lait little ai)i)arent ; upon its middle
there are two hrown longitudinal lines, which diver<re a little Iteliind
and' are very mueh shortened ; some portions of the usual lateral
stri))es are also visible, and the sin<^lo bristles are inserted ujton
lirownish-blaek spots. Seutellum dull, usually more brown than
tli(! upper side of the thorax. Pleune jrreenish-^ray. Abdomen
green, eovered with a rather thick whitish dust, wh'"h gives it a
somewhat clieekerod a})pearancc ; viewed from another point, the
nnddle line and the posterior margins of the single segments ap-
])ear almost ))lack. Ilypopygium Idaek, with whitish dust ; the
lamellic arc of moderate size, rounded oval, with short hairs,
which are black on the upper and ajiical nmrgin, and whitish on
the lower margin. Coxa; black, with yellow-whitish dust ; fore
coxa; beset with extremely short, delicate and sparse hairs ; be-
sides, on the inner side of their basis there are a few stiff l»lack
hairs, and towards the tip a few black bristles. I*'eet black ; fe-
mora and tibitu with a metallic-green lustre ; on the front side of
the hind femora there is a single black bristle, rather distant from
the tip ; very characteristic are the bristles on the ujijjcr side of
the hind tibiie, which have shorter bristles in the vicinity of the
basis and a longer one near the tip, otherwise of the usual shape;
U])()n the middle, however, there is a row of three solitary remark-
al)ly flattened bristles. All the tarsi jjlain. Cilia of the tegiiia^
black. Wings narrow, towards the basis still more mirrowed,
grayish-hyaline; the second portion of the marginal cell more dis-
tinctly dusky, the posterior transverse vein with a somewhat
darker margin ; the costa distinctly thickened upon the middle of
its first segment.

Hub. District of Colund)ia. (Osten-Sacken.)

1:

Gen. VII. ORTHOCHILE.

The following are characters of the genus Orthochile : Probos-
cis slender, elongated and directed straight downwards. I'alpi
likewise very elongated. The first joint of the antenna? distinctly
hairy on the ui)i)er side, the second transverse, the third not elon-
gated. Arista dorsal, with an extremely short, almost impercei)ti-

OUTiroCIIir-K — SYliKSTIlOMA.

115

lilc inicrospojiic itubcsccncc. TIio iiitVridr corner of the eve <l:s-
tiiii'tly iHtidornl liy tlic iiiin-ow cliccks. llypopy^i'imu entirely (li>-
,.|iu;m-('il, sessile, its exterior iijtpenduii'es liiiiieilit'onn. The first
joint of tin.' liind tarsi witlnir.t In-isties. Tlie lust sejrnieiit of tiio
fiirtli lonu'itndimil vein converu'es towunls tin- tliinl, iiltlioiii:-li lint
liraihiiilly, still snilieiently so ns to I'eiu-li the niiiru'in of the winjr
(jiiite fur fnnii its tip, in the iininedinte vicinity of the tip of the third
Innu'itndinal vein. The whole structure of tlio liody approiiches
rnther closely that of the sp<'cies of J/rrrostiiDiii.t, still the species
of Orlhufltili' distin^'uisli themselves sutliciently by the extraordi-
nary elonu'ation of the proboscis and of tin- palpi, and by the j)re-
seiice of narrow cheeks; Ix-sides, the tips of the third and fourth
lonu'itinlinal veins lie more closely toj;'etlier and farther from the
tip of the winu', than it is the case with any of the sjiecies of
I/i'rr()sf<ti))iifi. The described species of this u'cnus are found iu
Europe iind in Asia Minor. The North Ainericau species, which
.Mr. Walker described as Orthocliilc dcrcmpla, cannot, hy any
means, l)e an Ortliodnlc, as its arista has an apical jxisition. In
what n'cnus it is to Ite located, or whether a new jii'eiius is to be
created for it, cannot be determined from the very imperfect state-
ments of Mr. AValker, as he does not even state the sex of his spe-
cimen, nor whether the first joint of the antenmo is l)are or hairy,
whether the lirst joint of the hind tarsi is bristly or without 'oris-
tles, ami whether the fourth longitudinal vein converges towards
the third or not.

The name of the genus (from op^o?, straight, and x^i-ko^, the lip)
has reference to the form of the proboscis, l)y which the species of
this genus can easily be distinguished.

A.^^lllPwl

Gen. VIII. SYBISTROmA.

The following are the most important characters of the genus
Si/hislronia : Face not reaching as far as the lower corner of the
eye. very narrow in the nmie, very broad in the fenuile. The lirst
joint of the antenna' distinctly hairy on the U})perside; the second
joint of the antenna? transverse; the third narrow and somewhat
long in the male, broad and short in the female. Arista snb-
api<'al ; in the male it is very long, its lirst joint longer than the
second and thickened at the end in the sluipe of a knot ; the second
has at its end a lamelliforni enlargement. Seutellum very dis-

u

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no

mPTERA OP NORTH AMKRICA.

[part tr.

tiiictly Imlry. IIy|i()|)yj,'imii t'litiroly (lis('ii,u-a}r('(l, on ii sli(trt |>t'-
(luiiclo; its oxtorior ajipoiKlajiCS hiiiicllirurm. 'I'lic lirst joint ul'
tilt' iiiiid tursi without bristles I''irst posterior ct'll narrow,
towards its end very narrow; nevertiu'less tin' last sejrnient oltlic
fonrtli Ion};itudinul vein only very gradually a]»i»roachos llio third
ion^ituilinal vein.

The next related ji:oncra arc //c/ros^^m ((x and Ilii/>ojihi/lli(ti ,-
their speeies were fornutrly located with Si/in,'>ti'oina. Frtnu lioih
these p'uera Sijhifttroind, dilVers, besides the peenliar structure of
the antennit' of the nuile, by the very distinct hairs on the scutel-
luni.

'Ihis (renus was hitherto c(»nfincd to the Fuirojiean Si/hiaf/'dnia
luxh'roj'iu'x, uidess perhaps Si/hidroma JiiiJ'oiirii belouffs to it.

Tiie derivation of the name of this genus is not clear t<t me.
That it should be derived from ai-iivv.,, the spear, and arp^jfia, the
couch, is not |)robable, ut least it would then be a very unsuccess-
ful composition.

Gen. IX. IIEUCOSTOIViriii.

I have established the genus Jfcrcoxtomui^ in the fifth numlter
of the " Neue Jieitrdye,^^ upon the species Sifliis/ronia cirdfcr
lln\., fuli'icaudis Walk., and loiifji cent via Loew. Th.'se species
agree in the following characters : in the distinct j)uI)esceMce of
the otherwise i)Iain arista; in the structure of the ju'oboscis ; in
the distinct hairs upon the surface of the suctorial fl!ij)s ; in the
glaln-ousness of the scutellum, and in the apparently sessile hy-
popygium of the male. The last of them approaches the species
of llijpophijUus very much, and shows some marki'd dill'ercnccs
from the two first, so that their consolidation into one genus may
1»e considered as provisional, and will certainly have to be modified
when a more considerable number of sjtecies will l)e known.

In order to give more homogeneity to the genus (lymnoiiternuK,
it was necessary, as I have remarked l)efore, to exclude all those
species the third and fourth longitudinal veins of which are de-
cidedly (H)nvergent. These species, however, approach the above
named species of Hercostomux more than the si)ecies of any other
genus. 1 see no difliculty at present to unite them with the genus
Ifrrroxlomiis, whicli is not ripe as yet for further subdivision on
account of the insufficiency of our knowledge of its species.

1,

5^

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HEUCOSToMrB.

in

Till." cliiiriK'tcrs of tlio frt'iius inay Itc HtTiiicd ns follows: An-
tciiiiii' of urdiiiury striiclurc ; tlu; lirst joint hairy on the iipitcp
side; tlic second joint of tlu' antt'tiiiu' transverse; the third
joint not ehtii<iated ; arista dorsal, of llie usual plain stnu'turo.
Sciitelhnn without hairs. l''a<'e init reaehinjf as far as the iu-
fcrior orl»it. IlyiMipyninni (»n a very short pednnele. so as to
appear sessile ; exterior appendap'S lanielliforni ; interior append-
aucs hut little tleveloped. Tlii' lirst joint of the hind tarsi without
liristles. Tilt; lirst posterior cell narrowed towards its end; the
last seuiiKMit of the fourth lon^itinlinal vein only gradually ap-
jtroaelies the third loiiifitudinal vein.

The dilferenees from the fi'enera <ii/iiini)/ilvrnu!<, with its third
and fourth lonjritudinal veins parallel, from I'rl(islniiciinii< with
its feathered arista and the fourth loniritudinal vein stronjrly in-
ducted forwards, /'arai'liux with the end of the fourth lonj-itu-
dinal vein aniiidarly iidlected forwards and then runninj;' towards
the mar^'in of the win,tr, in the shape of a seu'nient of a circle, are
self-evident. The species of JIcrconlonKis dilfer from thoso of
JlijjiophijUufi by their arista, which is plain in Itoth se.xes, hy tho
apiiareutly vsessile hypopyyium and l»y the lesser development of
its interior ai)penda<^es.

Up to the present lime oidy European s)»ecies have lieen made
known; I am now enabled to add to them a North Ami'ricaii
species.

The name of the genus (from i{>xoi, wall, fence, and nTojuo,
mouth) has reference to the oral oiienintr, surrounded, fence-like,
by the suctorial surface covered with rows of hairs ; this being the
case with those species on which 1 had originally established this
genus.

■■j;t;

■,i ■.■' ■'

:- " ». ■'&; '

1. II. linicolor, n. sp. % . — Ol^scure viridis, nitirlns, aiitennis, ocu-
lorum ti'gnl.'irunKiiie ciliis in'ilil)us(nn' totis iiigris, jilis ciiiereis, liinieliia
liypopygii ovatin, nigricantilius, in ili.-'co sordidissime exalbidis.

Dark-green, bright; antennrr, cili.i of tlie inftirior orbit and of tlie ti'guhn,
also the feet, black ; wing;? gray, lanu'll;p of tho liypopygiuin oval,
blackish, upon their middle very dingy whitish. Long. corp. 0.11 —
0.12. Long. al. 0.13.

Dark metallic-green, almost black-green, bright. Front me-
tallic-green. Antenna' black ; third joint oval, at the tip only with
a blunt point. The color of the narrow face seems to have lieeu

•

IC-

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lis

DIPTEUA OF N(»IITII AMKIIK A.

'imii'.

m

[I'AiiT ir.

orijiiiiiilly ffniy. Cilia of thf iiilVricir orl>it, as far as I ran (lis-
tiii^ui>li, iiiack. Sciitciliiiii witlimit iiairs. II y|Mipy^'iuiii i)lai-k ;
lis laiiK'iia! nitliiT iaijif, oval, iiiirruwnl at llu' runt, IViii^'nl wiili
i»latk hairs; tlicy have a lila(ki>li a|t|M'araiii<', aiT liuwcvir rially
l)lai-k only on tiic niar<:'iii, wliilr in tlit> initMIc, at least wlit'ii son
in a iMTtain (iirt'ction, tlicy Itmk dinji-y wliilisli. Coxa' ami I'lct
Idark, the latter plain; I'eniura \\itlia jireenisli rellectinii ; tlie
upper side (if the lore tiliia- only with two small Itrislles. The
yelliiwish-white tejrula' have l»laek cilia. Wiiius u-rayish hyaline
with railier delieate hlaek veins; they are cdinparalively lunji' and
narrow and have a very re;iidar elonjrated elliptic outline. The
last sc^nnent of the fourth lon^i'itudinal vein is especially lon<r,
with an iniperceptilde sweep and approaches in its entire course
jiradually the third lonjritudinul vein, so that iheir vmU are not
very distant from each other.

JJul). Fort llosulutiuu, Hudson's IJay Territory. (Kcnnicott.J

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(ien. X. IITI'OPIIYI.l.t S.

This frenns may l»e characterized in the followin.u" uniuner : The
lirst jointof the anteinue distinctly hairy on its upper cdji'e, the
second joint of the antenna) transverse, the third not elouiialed ;
the arista dorsal, very bare, rather strousj; as far as its end ; its
lirst joint in the male remarkahle either for its jireat length or its
incrassated tij). The face of the male very narrow, especially
Itelow ; the face of the female broader, sometimes much broader.
Sculelluni not hairy. Abdomen elongatid, that of the nnilo
rather strikinuly pointed at the end. The entirely disen,u'a<i'e(|
liyjuipyiiMum pedunculnted, usually of a yellow color; its exterior
appendajres lie (»n its under side, stretched out alongside of each
other, and are small, narrow, eloni>'ated lamelhe; the interior ap-
pendau'es are rennirkablo for their extraordinary development, are
nnich loufror than the exterior ones, either strap-shaped or broader
at the end and beset with long hairs. Feet comitaratively lonj?
and slender; the lirst joint of the hind tarsi without ))ristles and
shorter than the second. The last segment of the fourth longi-
tudiiml vein has only a very gentle sweep and very gradually aj)-
proaches the third longitudinal vein.

The narrow, stretehed-out shape of the body, the peculiar struc-
ture of the arista, the long pedunculated yellow hypopygium and

II.\I,TKtll('KUrS.

119

tlio pccjilinr sfnirtnro of its iippi'iKliif^cs, (listiiijjiiisli thus genus
sulViciciitly rroiii all tlir oilier rrliitcil p'ciici'ii.

Only Kiiropcaii species of //i//)iipliifUu!< iiro as yi't known.

'I'lie niiiiie of the jj:enns (from vno, nnder, iind trxxov, the leaf)
has relereiiee to the niodt.' of life of llie speeies, fonnd in shady
places uii Ituslics und horljs and rnnning on IkiiIi sides uf the leaves.

Oen. XI. II il.TI.RK F.lll N.

This genus was estaldished l)y Mr. Ilomlani, in tlie year 1H44,
in the \\\\ volnnie ni' the AiukiU ilillf siirii:f NdhiraJi tli /So-
1(11/1111, nnder the luune of Linlni-iriiix, which afterwards, in the
first vidnin(,' of the /'riiilrotiiiit< Jh/ilrroloijuv lldlicir, he changed
into /Ifillrritiriix. His statements with regard to the characters
of the geiins are not snilieient ami not allonelher correct. 1 am
ulile to complete and t(» correct them as follows, from two Span-
ish species of my own collcctittn, one of which, accoriling to Mr.
llaliday, is also fonnd in Tpjier Italy.

The face of the nnde very narrow, that, of the fennile compani-
tively very liroad ; in l)oth sexes it does not (piile reach the lower
marii-in of the eye. J'alpi snndl. The lirst joint of the antenmii
of the nnde large and very inncli inllaiecl, in the female mnch
smaller and less inllated, in Inith se.xes however beset on the npper
side oniy with extrenu-ly slmrt, rather imperceptiltle hairs. The
second Joint of the anteinne in both sexes very snnill, rathi r rndi-
nienlal, somewhat imi)edde(l into the lirst joint and only dislin-
gnishalde )»y the l)ristles with which it is fringed ut its end. The
third joint of the antenna- in the females of all species appears to
he ronnded ; in the nmii'S it has.citlier a more elongated or almost
a conical form. The arista of the I'emale is plain, dorsal, two-
jointed, its lirst joint short. The arista of the male is also two-
juintecl ; its lirst joint is liliform and very nnn-h elongated, the ab-
lireviate(l second joint forms a Hat lamella; the position of the
arista in the nudes with an oval third joint is distinctly snliapical,
in the other species it is apical or appears to lie so. 'I'iie nenra-
tion of tlie wings resembles that of the species of Si/flriiiiK, the
last segment of the fourth longitudinal vein being gently, but still
sulliciently inflected forward to approach with its end closely to
that of the third longitudinal vein. Feet slender, with sctirco
bristles; the first joint of the hind tarsi without bristles and much

' »

Tfff^

120

mpTERA 01' NOHTir amp:rica.

[part ir.

shorter than tlic second. II\ i)opvn:ium entirely disengaged and
jK'ihinculated ; its exterior appendages are hunelliibrni, the inte-
rior (»n('s nineh less developed than those of JI/jpopJiijllus.

The species of J/allericcrus are related to the species of the
genera JIijpoplujUus and .I/i'rcotif<n)iiis ; they diller from them
sulllciently liy the rndimentary second joint of the antenna' and
also the strncHirc and position of the arista. They have also
some resemltlance to the si)ecies of the genns Hifslcnus, the first
antennal joint of which, however, has no hairs on the upper side
and the arista is distinctly apical in both sexes.

The name of the genus (from a^nji), the poiser, and x/paj the
horn) has reference to the renuirkable structure of the arista of
the male.

As yet, only the three above named species of JlaUcriceriis,
which belong to the Fauna of Southern Europe, arc known.

Gen. XII. DIOSTRACL'S.

The North American species, for which I have estal)lished this
genus, resembles Thinophilua. In the structure of the abdomen it
reminds me of A/>hrof<i/li(f<. with which it also agrees in the struc-
ture of the hypo])ygiuni. Jt dilVers from l)oth of these genera by
the distinct hairs on the u]»per side of the first joint of the antenna?.

The following may be considered as the characters of the pre-
sent genus : Face lu both sexes broad ; the palpi in the male of
extraordinary size, in the fennde much smaller, and in both sexes
loosely recund)ent upon the jjroboscis. Antenuic small ; first joint
liairy ; second joint transverse ; third joint extremely small, dis-
tinctly covered with hairs, and with a dorsal bristle. Thorax,
scntellum and feet only with short and very scarce bristles. Ab-
domen with short hairs, without any longer bristles before the ii".-
cisnri's. First jtnnt of the hind tarsi witlnnit bristles, considera-
bly htnger than the second. Wings long and narrow ; the poste-
rior transverse vein somewhat close to the margin of the wing;
the last segment, of the fourth longitudinal vein without any
flexure, but only a little curved, converging somewluit towards
the third longitudinal vein and ending beyond the tip of the wing.
The fifth segment of the abdomen of the nnde is rather narrow ;
the sruall si.xth segment partially concealed under the former ; the

i>iostract:s

I'Jl

liypopyjrium short, stout, ratlier diseiigiigi'd ; its outer apin'iiilajii'S
are suuiU lanu'lla'.

The {reuus J>iostraci(K is so i)e('uliar tliat more drtailiMl statf-
uu'iits are unnecessary to (listiujiMiisii it from other fi-enera. Its
UKtst strilving character is the peculiar (lisk-lilie Inrni of the ]>alpi
and their very consideral)Ie eiilar,u'cnient in tlie nudes.

The name of the ficnus (from 61.;, twice, 63T|iaxor, potsherd) iuis
reference to this diaracter.

1. I>. prasiims LoKW. % and 9. — Prasinus, subopacus, abdoniiiio
iiigiii'iinti', in'ilihiis llavis, maris tertio tarsoruni antiforiiui artiuulo coia-
presso ft in luarginu supero pilis nigris barbato.

Leek-green, sotncwbat dnll, with a blaekisli abdomen and yellow feet ;
third joint of the fore tarsi of tlie male compressed and bearde<l on the
npper margin with long hairs. Long. corp. 0.1b — (.1,20. Long. al. 0.-;5
—11.24.

Syx. Dloslraciis jinisiiuis Lokw, Neue Beitr. VIII, 44, 1.

Male. Face for a nui'e very Itroad, metaliic-g'reen or Iiiiie-
g-reen, sometimes coi»per-col(«red, witli a ratlier distim-t tran-verse
swelling, and hy far not reaching the lower margin of tlie eyes;
dusted with grayish-yelhtw. Palpi of uniisiud size, rather rounded,
loosely recuml)eul upon the pntlxiscis. yellow, covered on the upper
side witli a thick snow-white powder, ami with a delicate, almost
iuiperceptiltle, white pubescence. J*rol)oscis for a nude unusually
large and stout, brown. The snndl auleuna' lirownish-yellow,
most of the third Joint linjwn, the dorsal arista blackish-l)rowii,
lonii: ami not verv stronu-, with a short, I)Ut distinct indtesccnce.
Front above broader, metallic-green or blue-green, seen (tl>Ii(pu'ly,
somewhat darker, without dust. Cilia of the ui»i>er orbit black,
of the lateral ami inferior orbits yelhtw. I'ppersiile of the thorax
of a s-aturate leek-green or parrot-green odoring ami with very
little lustre; on its anterior nuirgin there is some gray-whilisli
liolleii, which is interrupteil l)y the anterior end of a not very
striking and not far-reaching dark-ctdored middle stripe. The
usmd )»lack bristles 011 tl;e u|)p( r side of the tiH)rax are few and
sl.'irt ; there are m) liair,* ujiou it. If exanuned from liehind, a sti'ipe-
likedark scarlet-brown spot, immediately above the root of the wing,
may be noticed ; on the posterior uiargin of the Miora.x tlie;'e is also
a more distinct covering of brown-grayish dust. Sciitellum with tin;
usual bristles, olherwisu bare, >ioiuewl;ut sho'-t, usun.'ly of a mure

'•!

h

i^'''

miff^jm

: i

ililiil

i; (i

lii^;^

;(i

122

DIl'TERA OF NORTH AMERICA,

[I'ART ir.

dusky color tlian the uppor side of the liionix. IMotiriu wilh frrayisli
dust upon black ish-jfreon ground. Tlie nictatlionix is of unusual
Icnu'tli and slopes but very gradually, so tliat tiie lenjitli of the
thorax, as compared with that of the abdomen, is unusually lar^e.
The color of the abdomen is dusky bla('kisli-<rreen and but litth;
metallic ; the hairs are short and oidy on the posterior nn>r<iin of the
first segment there are some black liairs of greater length. Tl.e
l)lack hypopygium is short and stout, sessile, but rather disengaged ;
its snndl outer ap]>endiiges are lamellii'orm, ))lackish-bro\\n and
liairy. Fore coxiu long, pale yellow ; on the Iroiit side they are Ix'set
Avitli so short and delicate white little luiirs that they appear gl.i-
broiis ; at their tij) there are black bristles. ^Middle and hind coxie
yellow, often brownish as far as the tip, es])ecially on the outside.
Feet yellow, rather long ; middle and hind fenioru very slender ; fore
femora considerably stronger ; all the til'iie < ;. i.ie under siile very
l)are, otherwise beset with (piite short little black hairs ; tore tibite
rather stout, somewhat comitressed and curved inwardly, colored
with brownish-black u])on the latter half of the upper side and most
of the hind side thickly bearded with long yellow hairs. I^Iiddle
and hind til»ia; plain, beset oidy with few and wea'c bristles, infus-
cated at the end Fore tarsi black, only at the basis of the first
joint )>rown ; the urst joint oidy a little longer than the second;
the second at the tip with a vestige of a slight conijtression ; the
third joint strongly compressed, broad, bearded on the ujiper i'(\i<:(i
with stitV black bristle-like hairs ; the two last joints very short, and
of the usual form. ]Middle tarsi somewhat longer than the tiltiie,
the tirst joint alxnit as long as the other three taken <>igi.(lier, yel-
lowish-brown with Idacktip ; the last four joints are M i i mid the
noddle tai':;i on the hind side rather thickly covered >v,i' long
hairs, liind tarsi black, about as long as the tii)ia', of plaiu struc-
ture and not unusuallv hairv ; the first three joints are of araduallv
diminishing length, the fourth about half as long as the third, and
the fifth again somewhat hdiger than the fourth. The teguho
have brown margins with yellowish cilia, which assume, in some
directions, a brown tinge. Wings grayish hyaline, long and nar-
row with rather strong brownish-l)lack veins ; the first longitudinal
vein reaches far beyond the third ]»art of the anterior margin ;
second longitudinal vein straight ; the third longitudimd vein at
its end only very geidly curved backwards; the posterior trans-
verse vein lie.s far beyond the middle of the wing.

ANKPSIUS — AROYRA.

123

Female. Face liroadcr than tliat of the male, with a more
devL'loiii'd traiisvrrso swell in <r, and covered with dust of iiiueh more
gray color, raljti iiiiich sinallor liiaii those of the male, only
about half as lariri', l)hu'kish with yellow-fi'rayish dust, and with a
consi(lenil)lo covering of pale brown hair, which in another direc-
tion ai>i>ears to be entirely black. The sixth segment of the al)-
doinen, although very short, still distinctly perceptilile. The hairs
on the anterior side of the fore coxic longer and coarser, yellowish.
Tibise and tarsi simi)le and with the usual short hairs; the joints
of the fore tarsi gradually diminishing in length. The wings
usually a little duller than those of the male.

Hab, 2se\v York. (Osteu-Sacken.)

Gen. XIII. AIVEPSIUS.

The genus Ancpsius shows the closest relation to the genus
SiiKtcnux, from which it differs oidy l)y the structure of the first
joint of tlu! antennae Its characters are the following: The first
joint of the antennie hairy on the u|)])er side, the second transverse,
the third rather large ; the arista inserted on its ui»])er side, (iiiito
near tlie basis. The abdomen of the male appears compressed
from the side. IFypopygium short, not entirely iiidjcdded ; its
outer appendages very snmll. The first joint of the hind tarsi
without bristles. Wings not enlarged towards their basis; the
last segment of the fourth longitudinal vein not inflected and
jtarallel to the third vein.

Tlie name of the genus (from djf^/to;, cousin) 1ms reference to
its intimate relationshij) with Hiji^tennx.

No si)ecies of Anept^ius has yet been found besides those known
from Europe.

1>^

Gen. XIV. ARUYRA.

The species of Argi/ni are easily distinguished by the dense
silvery-white dust, which almost in all the species covers head
and abdomen, in many also thorax and scutelluui. The majority
of the sjtecies of the genus Jjcwoxtola resenil)le in this respect
those of Ar(iyra, and differ from them oidy Ity the first joint of the
antenuic of the former being entirely l)are, while in the species (jf
Anij/ra it is covered with hair on the upjier side. The following
are the most important characters of the genus Ar^iyra : Second

■mm

W

tl

124

Dll'TKRA OF NORTH AMKHICA.

[part it.

joint of the antonnic traiisvorso ; tliird in tlic male rather lar^'^o,
baro ; the apparently liare and distinetly twn-jointed arista is in-
sorted elose to tlie tip of the antenna. AVinji-s l)r()ad, the posterior
anj^le ratlier stron;.!;ly projeetinji- ; the first hmjjritndinal vein is
ratlier more distant from tiie nnirgin of the winj^ than in most of
ihe otiier jj-enera, and is longer than usual ; the fourth longitudiiud
vein is inlleeted forward before the middle of its last seirnu'iit,
thence however it is (piite parallel, or almost parallel, with the
third longitudinal vein ; the posterior transverse vein is not ap-
pro.ximated to the margin of the wing. The lirst joint of the
hind tarsi without bristles, llypopygium small, imbedded ; its
outer appendages are two very small, narrow lamelhc directed
downwards ; the interior appendages are of rather simple struc-
ture and often not distinctly ])crceptiljle.

The name of the genus (from aijyvpo;, silver) has reference to
the beautiful silvery lustre of most of the species.

The hitherto known species are distributed over Europe, a part
of Asia and North America. I know seven North American
species, of which the first has a hairy scutellum and therefore
))elongs to the relationshii) of the European Anpjra dinphana.
The other six species have jio hairs upon the scutellum ; the upj)er
side of the first joint of the antenmc is, in some of them, so
scarcely provided with hairs that they can easily be mistaken for
species of Leucostola.

Table for the determination of the Species.

, f Scutellum hairy.

I Scutellum not hairy.
2 ( Feet mostly hlack.

I Feet entirely or mostly yellow.

1 albicans Ln

3
4

'The entire fore tibite and a part of the four posterior tibire yellow.

2 nigripes, uov. sp.
All tlie tibiiB entirely and the root of the fore tarsi yellow.

3 albiventria, uov. sp.
, I The whole feet yellow. 6

l Not the whole feet yellow. 6

fThe first joint of the hind tarsi only with the usual very short hairs.

4 minuta Lie.
The first joint of the hind tarsi with longer hairs than usual.

5 calcitrans Lw.

n ) Tip of the hind femora not black. 6 calceata /.«•.

I. Tip of the hind femora black. 7 cylindrica, nov, ?p.

o <,

k

m

ARGYRA.

Systematical arrdiiijewcnt of the Species.
I. Scutelluin distiiK^tly hairy.

1. albicans /.lo.

II. Scutellum without haira.

A. Abflouien somewhat nonical, white, glittering.

2. nigripes, nov. sp. 5. calcitrans Lw.

3. albiveiitris, nov. sp.

4. minuta /.w.

125

■: ]

0. calceata Lw.

B. Abdomtn entirely cylindrical, without white glitter.
7. cylindrica, nov. sp.

Descrijitioii of the Species.

I. SrUTKLLUM DISTINCTLY HAIRY.

1. A. albicans Lokw. % and 5. — Scutello piloso, tibiarum postica-
rum apice tarsis(iue posticis nii;ris.

Scutellum hairy, tip of the hind tibiae and the hind tarsi black. Long,
corp. 0.2:5—0.24. Long. al. 0.23—0.24.

Syn. Arijyra alhicmis Lokw, Neue Beitr. VIII, 45, 1.

3foh'. Covered all over with filitterinjr, silveuy-wliito dust. Face
and front of niiddl:' breadth, silvery-white. Palpi black. Pro-
boscis brownish-black. Anteiuue black, the third joint more
In'own-bh^'k ; arista distinctly inserted before its end. Cilia of
the superior orbit Idack, the hair-like cilia of the lateral and infe-
rior orbits snow-white. Fpj)er side of the thorax and scutolluni
shiniuu: <j:reen, still so that the silvery-white dust seems to cover
the ground color, even if looked u|»on from different sides. The
soutellum has upon its upper side, besides the usual bristles, some
very distinct little black hairs. Ground color of the abd(Miu'u
greenish-black, the second and third scfrnients have very larire,
rounded, transparent yellow lateral sjjots; otherwise, the whole
abdomen is also covered with thick silvery-white dust ; its hairs are
almost exclusively black. The small and narrow lamelhe of the
hypopygium are brownish-yellow with black tip and with a black
]>ubescence. Fore- coxa' yellowish with white dust and with black
bristles and little hairs. Middle and himl coxa* black with white
dust; th'Mr hairs and bristles black. Feet yellow with bhack
hairs ; upon the under side of the fore and middle femora are iu-

m

I ',5

it
I' .

ililli

126

DIPTERA OP NORTH AMERICA.

[part II.

sertod Mack Imlrs of jrveatcr lenjrth than those on tlie unck'r side
of the liiiid fi'inom, wliich are brownish-bhu'k at the tip. Tiliite
moderately provided witli l)ristles, tlie hind tibiie blaekened at tlio
tip. F(tre tarsi towards tlie end only sliji-htly infnseated ; tlie (Irst
joint is at least H the lenjfth of the fonr f()llo\vin«^ joints toji-ether,
npon the nnder side with a row of delieate, l)nt rather lonjr little
hairs, which may be easily overlooked. Middle tarsi from the
i\\) of the (irst joint blaekish-brown ; however, the root of tiie ne.\t
followinjr joints somewhat ])aler ; the first joint is at least by one-
third lonji'cr, than the ft)llowin,<; fonr joints tojrether. Hind tarsi
entirely blaek, first and second joint of about the same lenj^-tli,
the followiiif? of a decreasiiijir lensTth. Cilia of the tegula.', which
have a l)la('k nKir<rin, yellowish-white. AVin<rs somewhat srrayish
with blackish-brown veins; the last seirment of the fourth lon<ritu-
dinal vein is strongly bent forward l)efore its nuddle.

Fcinalr. Face l)roader than that of the male, and the palpi
miu'h larsrer, the latter with a distinct covering of wliite dust.
The third joint of the antenna', as usmd, much snuiller than that of
the male. The dust n]>on tlie thorax and the scutellum less thick,
so that the <rrcen trronnd -color is dislinclly visible in everydircctiun.
The irround-color of the abdomen is shiniiifr and metallic-ji'reeii,
the dust upon it is oonlined to the anterior half of the segments,
extending only upon the last segment as far as the ]»osterior mar-
gin ; the yellow spots of the second segment are about of the same
size and nature as those of the male, those of the third segment
oecui)y only the anterior corners and are much smaller. The
hairs 11)1011 the under side of all the femora are short and the hind
femora are very slightly infuscated at the tip only. AH the rest
as in the male.

Hah. District Columbia. (Osten-Sackeii.)

Ohsrrralion 1. — Notwithstanding the difference in the coloring
of the hind femora, the female agrees with the above described
male so much, that T cannot have the least doubt of its ))eing the
other sex of Arriyra albicans.

Olm'r ration 2. — Arrpira alhirana can easily lie distinguished
from the European Arf/>/ra dia/ihana by its somewhat smaller
size, the paler color of its fore eoxie and of the cilia of the teguhe.
Xevertheless it resembles it very much. As Faliricius, in his
S;/»fcma Avtliaforum, states America to be the home of his 3/iisca
diaphnna, it might well lie supposed that he meant Argyra alhi-

'•V

AUGYRA.

127

cniiH or some similar American species, and that Mcifren was mis-
taken when lie believed it to be itleiitical with the cdinmon Kuropeaii
species. Such a supposition, however, would be erroneous.
Fabricius in his older works (of which at present I cannot com-
pare <»nly the Manlisftn II), mentions everywhere Europe as the
habitat. The statement of the Si/xtrma AntlintoriDit is, there-
fore, either a mere mistake, or Fiil>riciiix confounded later an
American s]»ecies with the European one. Even in the hitter case
the name cannot be transferred upon the American species. The
first, however, seems to be more pi(il)al)le, because Faliricius
in the S;/fti'vin Antliatorum, (piotes his former works without
the least liesitation, and declares that America is the habitat ot
this species, without mentioniiifr at all that he is thus in contra^
diction with his own previous statement.

II. SnTELMM WITHOUT HAIRS.

A. Abdomen somewhat conical, glittering with white.

3. A. nigrilM'S, n. sp. %. — Kx viridi l.npte chalybea, abdomine allx -
micantc, t'lonte et f.'U'ie atris, velutinis, pedibus iiigris, tibiis anticis
totis, reli(iuis ex parte Havieantibu.s.

Green-blue, with the abdomen glittering white; front and fane velvct-
blai/k ; feet black, the fore ti bine entirely and the four posterior tibia;
partially yellowish. Long. corp. 0.17 — 0.18. Long. al. 0.17.

Green-blue. Front and face velvet-l)lack, without pale dust.
Palpi and proboscis black. The first j<dnt of the aiiteniiie witii
a comparatively lonjr and close pubescence. I'pper side of the
thorax and of the scutellum shiniii,u-; the latter, as far as percepti-
ble, wit' out hair. Abdomen without transparent yellow spots
upon the anterior sepnents, and with a thick <i-littcriiin:-white dust,
which becomes thinner only towanls the basis of the abdomen.
The small laniellai of the hy[)opy,<rium are brownish-black. Coxa'
black; fore coxse with coarse black hairs. Femora lirownish-
black, the extreme tip of the four anterior ones yellow ; they have
only short hairs and short bristles. Fore tibia' yellow, on the
upjier side with less numerous, but stroiiirer hair-like I)ristles, on
the hind side with more numerous but more slender hair-like liris-
tles of eonsid(!rable len<]^1h. Middle tiliia' ii])on the whole upper
side yellowish, upon the under side blackish-brown ; they have
upon the under side, upon the middle of the anterior side and

M ■ I

M

mw

tSM

128

lill'Ti;i(A (IF NullTH AMi;illCA.

[i'AUT II.

upnii llio first lialf of tlic uiipcr sido rather stnjiifr 1)ristl('H. IliiiA
til)iiu at tlio root and almost upon tlio wliolo sccoml half black,
otherwise l)rownish-yello\v and not inerassated. Fore tarsi yellow,
soniewliut inl'nscuted towards their end, of jjlain strneture, only
the lirst joint upon the under side jjrovided with a few bristles.
Middle tarsi brownish-yellow at the basis, further brownish-black ;
the lii'st joint has upon the lirst half of Its underside rather numer-
ous black bristles. ]lind tarsi black, ])lain. Cilia of the teguhu
l)lack. Winti's hyaline, only a little tinj:;ed with jii'ay.

Jldh. 8itka. (Sahll)er<i\)

Ohxerratioii. — Of this and of the next followiiifr s|)ecies, as also
of Anji/ra ci/linilrioi, I jjossess only sin<ile specimens, danni<?ed
by mould, which crumbled to jdeees in the attempt of cleaninjj,' ;
however, as these three interestinj^ species come from a country
which is so little explored witii regard to Dipterolotry, and as the
important specific characters could b(! determined, 1 did not hesi-
tate to describe them. 1 must, however, reipiest not to attach
more weight to my statements about color, dill'usictn of the white
toinentum upon ul)domen and thorax, and about the appendages
of the hypopygium, than the circumstances should warrant.

3. A. albiventris, n. sp. %. — Viridis, niteiis, nlKlominc alliomi-
caiitu, tVontc ut facie iiiuris, albiilo-polliiiosis, pi'ilitius nigiis, tihiis oni-
iiibus tiitis tarsoruii»4Ue aiitii-orum basi lhivicantil)ii.s.

(Jioen, .^hilling, abdomen wliite, glittoring: front and face blackish, bat
with whiti.sh dust; the whoh) tibiae and tlie root of tlie fore tarsi yel-
lowisli. Long. Corp. O.IS — O.llt. Long. al. O.JS.

Metallic-green. Front and face ajtjiear. when looked upon in
most directions, almost whitish-gray on account of the dust which
covers them, but are l)lack. l'a]))i and proboscis black. An-
tenna; smaller than those of A?'(/ijra vigrrpei^; the first joint is
comparatively short and sparsely beset on the u])per side with
ratlnn- short hairs. Thorax and scutellum shining metallic-green ;
but when looked upon from the front, the covering of white dust
l)eeomes distinctly visible. Scutellum without hairs. Abdomen
covered with a thick dust having a white lustre ; its second and third
segments have, on the lateral margin, a large yellow transjiarent
si)ot. A'enter mostly yellowish. The small lamelhi,' of the hypo-
jiygium are brownish-black. Coxa3 black ; fore coxaj with long

m0-

|a|C*'V

1

w¥'

W!k

'wh''*'''f'

i-^^ti '■■ '■

ff^'-'"

,■{

■hL-i''

„ „{

ARdYRA.

12H

liliU'k hairs. Ffmora brownisli-lduck with yoMuw tip ; their lihick
hairs arc ('((innarutivoly Utu^i, especially upon the under side (if the
I'uur anterior feinora. Til>iu.' yellow, only the extreme tip of llie
hind tibia! hiaekish-hrown ; the lore tiltia' «r(! heset with four or
live bristles oidy ujioii the upper side ; the snnill l)ristles upon the
middle and hind tihiiu are likewise lait short and very scarce ; the
hind tibial are not in the least thickened. The four anterior tarsi
are brownish-yelh»w at theliasis, a little further l)lackisli-l»rown, of
]ilaiii structure, the first joint upon the underside witlnuit l»ristles.
Jlind tarsi entindy lilack. Teguhe mostly l)lack with black cilia.
"Winjis hyaline, a little more distiuetly tinged with gray than in
^1. Hitfrijicx.

llab. Sitka. (Sahlberj,'.)

KM

'\>W

4. A. niinilta Lof.w. % . — Scntdlo mulo, ppdit>iis totis palliMf tlavi-
ciiiitil)us, niutatarso iniiria posticn siiiiplii;!, lnvvirtsiine jmIoso.

Scuteliiinj l)iir«; tlie wliole feet jiale-yellowisli ; tlie lirst joint of tlie liiiid
tarsi of the male .simple, with very short hair. Long. corp. tMG. Long.
al. 0. 14—0. 15.

Syn'. Arijyra iiiiiintd LoEW, Neue Beitr. VlII, 4ii, 2.

Mdlc. Faee very narrow, silvery-white. I'alpi Idaek. Tro-
boseis brownish-black. Anteiinte black, third Joint more l)lackish-
brown ; arista distinctly inserted )>efore its tip. Fnuit silvery-
white. Cilia ( n the upper orbit black, very short and delicate ;
cilia of the Ir.teral and inferior orbits white, 'riiora.x and scutel-
luni shininp: green, covered with white, not very thick dust, which
conceals the ground color at the utmost oidy in the vicinity of the
shoulders. Scufellum, with the exception of the usual liristles,
bare. The giuiuiu coioi of the abdomen apj)ears to be blackish-
green, is however so thick. y covered with white dust that it can-
not be distinctly perceived ; the second segment of the alxlomen
has on each side a very large rounded yellow lateral spot ; the
third segment has a similar spot, lait smaller. The very small
and narrow lamella.' of the hypoiiygium are yellowish-brown atal
but little hairy. Fore coxse yellowish-white, with white hairs
and black bristles. Middle and hind coxa? also yellowish-white,
but blackened from the basis to a considoral)le extent ; hairs and
bristles black ; feet ]»ale-yellowish, oidy the end of the hind femora
has a vestige of infuscation on its ujjper side. The hairs upon
9

I ■ I

TWfwr

130

DIPTKUA OF NdllTH AMERICA.

[I'AUT II.

the feet arc not entirely bluek ; the fore femora linve nj)on the
hind side more, the iiind feniora »tii the nmh-r side less nnmeroiis
blnckish hairs of jrreater leiifrth. Fore tnrsi not infusealed ; the
first joint has searcely l\ the lenj^th of the fonr lollowinj^ joints
put tofrcther. Oidy the last joint of the middle tarsi is somewhat
infusealed. 'i'he lirst joint is fully as long as the others together.
The last joint of the hind tarsi is lirown ; the lirst joint is of sini-
jtle structure and beset with the usual short hairs, searcely a little
longer than the second, hut eiuisidcraldy thicker. Cilia <»f the
teguhe yellowish-wldte. Wings hyaline, scarcely a little tinged
with yell(j\vish-gray, with brownish-yellow veins; the last segment
of the fourth vein is very abruptly bent forward before its middle,
Hub. District Columbia. (Osten-Saeken.)

* ■%" '

ft. A. calcitrail8 Lorw. %. — Scr.iello nuilo, p«ililins totis pallide
llavicnntihuH, inistatarso jxistico iiwiris paulo incra.ssiito et valde liirto.

Scutellura bare; the whole feet pale-yellowisli ; the first joint of the hiinl
tar.si of the male foinewhat lIiickKiied and covered with rough hair.
Long. Corp. 0.14 — 0.15. Long. al. 0.11.

SvN. Arijyra cdleitruns Loew, Neue Beitr. VIII, 46, 3.

Male. Face narrow, silvery-wlute. Thorax and proboscis
black. Anteiimu black, third joint nnire blackish-brown ; arista
distinctly inserted before its end. Front silvery-white. Cilia df
the upper orbit black, very short and delicate ; cilia of the inferior
and lateral orbits white. Thorax shining green, covered with
thick white dust, so as to make the ground color invisible in some
directions. Scutellum also shining green, or blue-green, with
less dust, and bare with the exception of the usual l)ristles. The
ground color of the abdomen seems to be blackish-bhic, but cannot
be distinctly seen on account of the thick white dust which covers
it; the second segment is yellowi.sh and transparent, with a lilack-
ish border on the posterior margin and with a blackish middle
line, which is sometimes wanting; the third segment is of a simi-
lar color, only the margin on the ))ostcrior border and the middle
line are broader, though the latter is sometimes interrupted. The
small lamella) of the Itypopygium are brown. Coxte and feet
white-yellowish ; fore coxa) with delicate white little hairs and
delicate black bristles ; middle coxa' ou the outside with a black-
ish spot ; liind coxie scarcely a little blackened on the extreme

.1
i

.1 i(=

AlKiVRA.

l.]l

liasis. Foro nn«l middle fcinora witlioiit nny lotijrcr hairs oti tlio
under side ; the hind feiiKira have a row of hhick hristle-lil\e hairs,
inserted rather more on their hind side tliaii ii|Min the under side.
Tarsi towards tlieir end not infuscaled, hut onlv very litth' darlser;
the lirst Joint, »»r the tore tarsi is 1.', the lenjrlh (if all tlie t'ojiouini^
joints tal\en to;rether, <»n th(^ uiaN'r side with a row of delicate
]iairs; the first joint of the middle tarsi not (|uite as lonu- as all the
otiicr joints t(»jretlier ; hind tarsi unusually short, the first joint not
much shorter than all the others, a little thickened, on the under
side with rather loii<r hristle-like iniirs ; tlieseeond and third joints
(tf the hiinl tarsi of alxpiit e<|Ual len<rth. The eilia of the tetmhe,
wldeh have a hiackish nnir<rin, are white-yellowish. A\'in>rs some-
what tin^retl with yellowish-frray, with yelhtwish-hrown v<'ins ; the
hist sejrmont of tlie fourth lonjritudinal vein is l)Ut jrently inllceted
forward.

Hah. New York. (Osten-Saeken.)

6. A. calceata I-oew. 9.— Sfutello nu<lo, jwililMis pallido llavis,
tarsis pusticis iiigris.

Si'iitelluiu tjiire, feet jialc-yellow, witli Mack liind tarsi, Long. coip. 0. !(!.

Long. al. O.lf).
Sy.v. Anji/rd calredtn LoEW, Neue H«Mtr. VIII, 47, 4.

Fonalc. Faee, for a female, of moderate I»readth, silverv-
wliito. Palpi rather larjre, ))laek, with almost silvery-white dust ;
j)roboscis hniwnish-hlaek. Antenme l)lack ; third joint small,
with an acute an<ruhir tip; arista distinctly inserted In Ion' its
end. Cilia on the i^iper orhit black, extremely short and delicate.
Cilia of the lateral and inferior orl)its white, 'i'iiorux shinintr
jrrcen, in the vicinity of the shoulders rather thickly cov<'rcd with
white dust, s5 as to induce the liclief that the males are idto<rethor
covered with silvery-white dust. Scutelhim also sliininu' ;!-reeii
and with the excejttion of the usual bristles, bare, (irnimd color
of the abdomen jrreenish-bhu.'k ; the second, third and fourth set;'-
ments yellow, with the exce))tion of ilie extreme anterior niarLnn,
the ])Osterior nmrjrin and a narrow, not always distinct miildh;
line; on the sides of the sejrments and towards the tip of the ab-
domen there is some white dust. Cox.e and feet ]»ale-ye||(nvisli ;
fore coxiB with delicate whitish hair and with black bristles ; mid-
dle coxie with a g'ray spot on the outside ; hind femora scarcely a
little darker at the tip, hind tibiie at the tip not of u dark color.

I. ., j

"^f^

mm

i:]2

DtPTKIl.A OP NuIlTII AMKKICA.

[I'AIIT It.

Tarsi ('oin|inriiliv('Iy loiiff ; fi»ro tnrsi Hcnrccly iiifiiscntoil townnls
tlic cihI, only tilt' Inst jniiif hrnwn, tlic first jniiil ii littlf Innji-cr
tliiiii tlio others tukeii tojrt'lli<'r. Miildlc liirsi IVoiii the tip nf tin-
first joint Htroiif^ly iiit'iiscntcd ; the four Inst joints (ojrcdicr iis loiijr
lis tlic first one. Hind tnrsi entirely liliick, tlie first joint a little
shorter than the second, the f'olhnvinir joints decreiisinjr in length.
'I'lie cilia of the tejriihe, which have a hiackish border, are pale.
Wiiifjrs tiiijred more with hrownish than ycll(»wish-^'ray ; veins
rather dark hrown ; the last sejrineiit of the fourth loiifjitudinal
vein, liefore its middle, only slightly inflected forwaril.

Jiah. Middle States. (Osten-Sackeii.)

Ohftcrration. — It is impossihle to mistake .1. caUvnta for the
female of one of the two preceding species for the following rea-
sons : —

1. On aceoniit of the greater extent of yellow color upon the
abdonien, which is not so extensive in the females of the sju'cies
«»f J/v/y/v/ as ill the males.

'1. On account of the black eolorin' the whole hind tarsi.
It is probable that the <;oloring of the i en of the male of this

species resembles that of the mule of Leucustola r{n(fi(l(ita.

i

B. Abdomen entirely eylin<lrical, without wlute lustre.

1. A, C'} lilldl'ica, n. sp. %. — Viriilin, niten:*, aluloniine vix obao-
letissiiiie albiiio poUiiiorto, coxia anticirt peilibuscjue flavis, fetnoiuin pos-
ticoinm api(;e, suinnio tibi.iium posticarum apice, tarsis deniijue omni-
bu:4 imlu ab artiuuli prinii apice nigris.

Shining-Ri-een, the alxlonien has scarcely a trace of whitish dnst ; fore
i'ox<'B and feet yellow ; tip of the hind femora, tip of th<; hinil tibia? and
all tarsi, with the exception of their root, black. Long. corp. 0.2H.
Long. al. 0.22.

Metallic-green, and difTeriug from most of the species of Jr-
cfi/ra by the cylindrical form of the abdomen and the almo;-t
entire absence of all dust. P'ace with a white reflection. I'alpi
and proboscis lirownish-black ; the hair-like cilia of tlie inferior
orbit pale-yellowish. Thorax and scutellum shining, the latter
without hairs. Abdomen entirely cylindrical, not stouter about
the basis, metallie-green, without any transparent spots upon
the anterior segments and covered vith a thin, almost impercep-
til)l(>, grayish-white dust. Fore coxa? yellowish, with some very
scattered black hairs, and, at the tip, with lunger black bristles.

■V, I

■ \

eVNToUMON.

l:

Mi)lill«' 1111(1 hind ni\u> liliickish-ltriiwii witli y(>]lowi>li lip. Feel
yrlldwish, tip iil'tlit' liiml rciiniiji iiniwnisli-ltliu'lv to a coiisiiirnilM!
extent. Til*' l>liiek liiiir> mi ilic t'cet nrc .<niiie\vliiit ,'«piirsc iiml
iiiily orniidtllf ieii^rtii; on ilic iiiiiler .'^ide ol' the iore t'ciiiniii ihtic
lire init ti I'vw hhiek iuiirs uC frrenter h'li^'lli; iipuii llie under sid'!
(if the middle reiimni tliey iire in ^'renter iiiiiiilM'r ; on the under
side of tlie liind reinoin only tlio.se hiiirs which lire near the tip
have a somewhat jrreuter leii^rth. Fore lihiie with somewlnit,
loiifjer hairs on the under side, on the upper side with hut two or
three hristle-like hairs of greater IciilmIi. The middle and hind
liliiie with lint few and very short little liristles; the extreme tip
of the latter is infuseated. (Fore tarsi wantiiiji.) -Middle tarsi
plain, black from the tip of the lirst j(diit ; the first j(»int .somewhat
lonjrer than the four followiiijj: to^n-ther; on the underside with
liut two very .^^hort lilack little bristles; hind tarsi black; the lirst,
Joint »p to the middle brownish-yellow. Teniihe with a broad
black marjrin, with pale-yellowish cilia. Winjrs hyaline, some-
what tillered witli brown, the until an^rle less protruding than in
inoHt of the other species; the iieuration shows nothing unusual
for the <renus.

J/nh. Sitka. (Sahlberg.)

Ohnfrvalion. — Allhoiifih the imperfect state of the above de-
serilied specimen did not allord a thorough examination of the
hairs upon the upper side of the lirst joint of the untennie, still I
believe to have salislied myself of their existence.

Gen. XV. SV^'TORmOIV.

:^)'i

i"

I

> .it

Wiy- "

The generic character is as follows : First joint of the antenniiB
with hairs on the upper side; the sccmjikI reaching on the inner
side of the third in the shape of a tliumli; third joint of the an-
tenna^ elongated and jKiinted in the male and shorter in the fe-
male; the position of the arista apical. Scutellum bare. The
first joint of the hind tarsi without bristles and a little shorter
than the second. The hypoiiygium small and imbedded, with
very small, often not distinctly perceptible appendages.

The next related genus is Si/naiilirKu, the .species of which
differ from the species of Si/nlortiion only by the absence of hair
upon the first joint of the anteniue. Although this character may
appear trifling to those who have not studied the family of the

'■%y\

1 !•

' .1 -n

i;i

DII'TKlt.V OK NdltTII .\:\1I Kir.V.

rmmm

{■■

ai:t ir.

Ihiliitinptuliiln ciircriilly, iicvciMIh'Icss its <il)st'rvutiiiii is iiii|Mirliiiit,

lis

il is of vci'v grciil service lur llie speeilie <listiiietioii as well

lis

litr liie jieiierie Idculiim of siieli leiimles of ililVereiil species whit li
reseiiiltle euch other very chisely.

'iMie iiiiliic of the fjeiiiis (from nm roi'Mow, I connect hy iiiserl<Ml
pins) hiis reference to the chiiriu'leristic forinulion of the second
joint of the iinleniiie.

As yet only Kiiro|tean species of Si/nlitriimii have iKcoine

knowii.

XVI. Sl\iKTIIItlN.

Tlu' followinir are the most important characlors (»f this jrentis :
The iirst Joint of tlie antenna' without liairs; the secoiid reachiiifjc
more or less on the inner side of the tiiird, nsnally forminuf in the
mah's a tiiuml>-like projection, and in the femiiles a more iminth'd
jnlte ; tiie third joint of tln^ aiitenme in the males elon<:-ated and
poinle(l ; aristii apical or so near the extreme tip of the aiitennie,
as to be taken for such. Scutellum usually liare, first joint of the
hind tarsi witliout lu-istles. 'I"he hy|»opyijiuiii small, imiteddeil,
with very small, often not distinctly perceptihie appendaiies.

TluM Si/ii(iiiliriifi tlilVers from Si/nlnrinoii onlv hv the al»s(

lice

of h"iv upon liie Iirst joint of the antenme, has already lieeii stated.

Of the three species (h'scrilted helow, two undoulitedly lielon""
to the n-eiius Si/iKirtlirus. This cannot lie said with i'e<i-ard to
the third species, SniKirt/inia Ixirhdliia. Its position in the ^■eiiiis
Si/iiar/hnix can only lie a temporary one, lirouirht alHuit liv the
(lilViculties of placing- it into aimther fi'enus. It is stdliciently (lis-
tiiiuuished from the other species of Sifndr/finix liy the pecniiaritv
alone, that the second joint of the anteinne encroaches only verv
little on the inner side of the third. In its u'cncral appearance it
ap|iroaclies the species of I'of/ihj/nt/is very closely, so that I leavt;
it undecided whether it would not be better located there. Tlu^
size of the ])ulvilli of the fore tarsi betrays a r«'latioiiship with
Kiitiirsiix and IHaiihonix, the structure of the antenna', however,
does not allow its location in these two fi-enera. To erect a new
lit'iiiis does not seem advisable, as the species shows close rela-
tionship in various directions.

The name Si/ixirlhnix (from nvv, toircther, niid oii^imi-, joint)
has reference to the jieculiar mode of connection betwoeu the
second and tlie third joints of the untonua.'.

1^

SY.N.SKI'lllirS.

ir

'I'lic spccii's ulrcudy kiinvvii lji'l<iii;r to ]<Jiii-<)|><; and lu North
A incrini.

Tiilili fur tlic ilftninlndtiDii of thi- S/>icnn.

. ( I'ostorior i)i;iii;in (if Mn^ pIciirM' yi'llow. 1 palmariB, iiov. sp.

' I'dstfi'ior iii;ii>;iii of lh« |il('ur;u not vcllow. 2

,, I Hi 11(1 f((m()i;i yellow. 2 ciiiereiveiitriB /."■.

•■ Hind HMiiora gnM-ii. ;{ barbatua /.»•.

\i' ;

f

. .■ :■[»

S)/slrniiit!riil iintiuijrvirni nf llie S/nrir-i.

I. Lower lialf (>r tli(^ (icciput only with tlic iisiim! cilia.

1. palmaris, nov. s]i. 2. cinereiventris Au'.

II. Lower half of l\w occiimt with a strong Iteanl.
3. barbatus Ai».

I}<srri/iliiiti of the rSju'rlfx.
I. lidWKIl ll.M.K (IK TIIK, (MMII'ir (>. I,V W ITU TIIK, ISIAI, I'lMA.

1. N. pallliariH, n. sp. % and 9.— Viridis, pUiuranun inar>;ine pos-

tico, coxis, pe(liliiis(|iie llavis.
^. Tarsis inttMiiiediis apieeiii vursns dilatatis.
9 . 'I'arsis sinipliciliiis.

(ireeii, tli(i iMisterior margin of IIk* pleura', coxa- and feet yellow.
■J,. TIk^ middle tarsi towards tluMreiid eiilari;e(l.
9. Tarsi simple. Long. curp. (M:{. Long. al. (1.14.

Male. It can !)(' cnsily rccooiiizcd l»y its strikiiif; rcscniltliiiici!
to tlic iMiidpcaii Si/iiloriimii /(irsaliis Fnll. Ilutli r diiik Itroiizc-
grccii, little sliiiiiiij; ; tlic uImIoiiicii nsiiiilly rather co|»|)cr-c()]()nM|.
Aiitcmia' hlack ; I'.rst j(»iiit on the upper side entirely hare ; the
Hocond with a lonir tlminh-like pi'dji'etidii which overlaps the inner
side of the third ; tliini joint rather loiifr, pointed, very l>iil»c>-
eeiit, ; the arista has not |treciscly an apical init a somewhat siilt-
n|»ical ))osition, as it is the case with Si/n/orniDii /(irsahis. Face
covered with whitish dust, narrow. I'alpi and proboscis hiack.
Front steel-ldne. The delicate cilia on the inferior and lateral
orliits pale. S;Mitellnni of the same co!or as the upper side of the
thorax, and lieset, hesides the usual h; islles, with a few short hairs.
Pleurae frrayish-frreen, their posterior iiiartrin yellowish. The
sid;'s of the al)d(tmcn near its hasis sonn-wliat yellowish and trans-
parent ; on the posterior margin of il.s first segiiieiit there are long

iitlii

i;r>

PirTEIlA (IF NORTH AMKUIf'A.

[part ir.

■^

0

1

■

im

■■■

l)lii(;k Itristlcs, on the posterior Jiiiiiyin of the other sofriiiciits there
are only very short ])ristles. Venter as far as the tip yellowish.
Ilypopyjfiuin rounded, small, rather imbedded; its Itlaekish a]»-
peiidajres very short and therefore not distinctly ]"jrceptil)le.
Coxie and feet yellowish ; fore coxie oidy at the ti}> with a few
hlaek l)ristles, otherwise in front with short and very delicate white
hairs. The short hairs upon the feet are black ; umhfr side of the
fore femora glabrous ; middle femora upon the under side with a
row of short black bristles. P'ore tibiic on the upper side with a
dense row of black hairs, upon the lirst quarter of the hind side
with a single very small black l)ristle. ^Middle and hind tibiie
(»idy with a few short black bristles ; the end of the latter is some-
what thickened and of a brownish-black color. Fore tarsi plain,
from the tip of the first joint blackened; the first joint not quite
as long as the other four taken together. The lirst joint of the
miihllo tarsi nearly as long as the other four taken together, stalk-
like, a little thicker at the end and of a whitisli color; the second
joint very much llattened, whitish, the apical margin bordered with
Idack; the third and f(»urth joints also flattened, and, with the fifth
joint, which is not flat, of a deep black color. Hind tarsi as far as
the middle of the second joint brown, then black; the first joint is
a little stouter and shorter than the second and has upon the middle
of its under side a black bristle which is a little curved backwards.
"Wings hyaline, tinged with lH*owuish-gray ; the third and fourth
longitudinal veins show towards their end a slight eonv"rgoncy.

Female. The third joint of the antenme rounded-oval, very
much shorter than in the nuile ; the second joint of the antenniD
overreaches the inner side of the third only by a rounded lobe.
Face less dusty than in the male, very broad, by i;ir not reaching
the lower corner of the eye ; its lower part is voy conve.v and
protrudes in the shape of a njof, wherelty the mouth becomes very
large. The black palpi consideral)ly larger than in the male.
Feet j)lain, the hind tibiie not thickened at the end and only very
slightly infuscated. Fore tarsi from the tip of the first joint gra-
dually becoming more infuscated ; middle tarsi from the tip of the
first joint blackened, though the root of the second joint is some-
what paler ; hind tarsi at the root brown, black towards the end.
The little black bristles upon the under side of the middle femora
are missing. The rest as in the male.

llah. Sitka. (Sahlberg.)

P'lrlii-

SYNARTimUS.

]:]7

Ohxervafion. — Si/nlormon tarsatuti 1ms upon the upper side of
tlie first joint of tlie antenme, (juite in the vieinily of tiic Imsis, ii
few almost imperceptible little hairs, which I am unable to per-
ceive in the present species, so that I am compelled t(» locate it
into the genus Si/narthnof. It is further distiufruished from »S//"-
tonnon tarsa/ua by the shorter arista and by the broader winji's,
which are less narrow towards the root. Besides, in the male the
tip of the hind tibiie is less thickened, the second joint of the mid-
dle tarsi is l)roader, of a whitish color, and has only at its tip a
black marjrin, while in the male of S;p>lormoii ta7'satuti it is less
))road, yellowish upon the middle of the root and black u]»on the
whole apical half The relation which exists l)etween Synai^lhrus
jHilinaris and Sijnloruion farsatut^ is exactly the same as that be-
tween Hynarlhrus pallipes and Hijnl<jrnion Zclleri.

2. S. cinereiveutris Loew. f . — Viridis, coxis anticis pedibusqiie
flavis.

Green, fore coxae and feet yellow. Long. corp. 0.13. Long. al. 0.13.

Syn. Sijnarthrus cinereivcntris Loew, Neue Beitr. VIII, 48, 1.

Female. Shining metallic-green. Face very broad ; the infe-
rior porticm protrudes considerable in the shape of a roof, so that
the palpi are rather concealed and the mouth becomes unustudly
large ; the blue-green ground color of the face is rather covered
by a gray-whitish powder. Anteniiie black, rather large for a
female ; the second joint overreaches the inner side of the third
with a broad lobe ; the third joint is short, but very broad, beset
with very short but distinct hair ; the arista is distinctly longer
than the antennic. The front in the middle is almost blackish-
green, about the aui.'nniP steel-blue, on the ujipor corners ratiier
violet and may possibly vary a little in its coloring. Cilia of the
upper orbit black, those of the lateral and inferior orbits white.
Thorax shining metallic-green, with very thin and almost imper-
ceptible, nearly whitish, dust. Abd(»men also shining metallic-
green, on the lateral margin with but little percei)tible whitish
powder. Tenter whitish-gray. Fore coxie yellow, with delicate
whitish hair and no black hairs or bristles. Middle and hind
coxaj blackish with yellow tip, the former green on the front side,
and, like the fore coxae, beset with delicate whitish little hairs.
Feet yullow ; tarsi gradually dark brown towards their end, but

' i

7' ^i.J, ^

138

DIPTERA OF NORTH AMERICA.

[part II,

w

1 : '

%t

m A

SO lliat the first joint, with the exception of its tip, is dark yeUow.
and llie seeoiid j<jiiit, witii the oxeeptiou of its tip, is brovvnisli-
vellow. Tlie hind tarsi are visll)lv siiorter than the hind tibia.',
and the first Joint is loiiffer tlian the second. The yellowish tefru-
lie have a narrow (Kirii-brown niarfrin and yeil(jwish cilia, whicli
in some directions assnme a very darli color. Ilalteres yellowish.
\Vinsi;s jrrayish ; the last scfrnient of the fourth lonjritudinal vein
not distinctly inflected ; i»osterior transverse vein steep.
JIab. Middle States. (Osten-Sacken.)

II. Lower part of tfie occiplt with .i strong beard.

3. S. liarliatUH Loew. % . — Viiidis, pedibus flavis, femoribus postieis
viriditius.

Green, feet yellow, liind femora green. Long. corp. 0.12 — 0.13. Long.

al. 0.1 2.
Sy.\. SyiKirlhrus harhaUts Loew, >'eue Beitr. VIII, 48, 2.

Shininj? nietallic-frreen. T'ace green, and dull on acconnt of a
moderately thick yellowish-white dust, which however docs not
conceal the frround color. V'a\\V\ a little larjrer than those of the
nnilcs of >';nKirtlirus in general ; they have also a more disengaged
j)osition, a bright yellow color, and are beset with a few black
little hairs. Antennie black; the second joint reaching only a
little on the inside of the third, almost of transverse form ; the
rather strikingly hairy third joint is l)road only about the basis
and Ix'coMU's elongated into a narrow and very long point; the
arista is entirely apical and only half the length of the third joint.
Front metallic-green, little shining. Cilia of the U|)per orbit
))la<k, .short and delicate; cilia of the lateral and inferior orl)its
very long, white ; they form with the; hair on the lower part of the
occi))iit a striking beard. Thorax and scutellura metallic-green,
the former less shining on account of a cover of pale dust, the lat-
ter sometimes more bluish-green. Abdomen metallic-green. The
last segments assume in some directions a rather black-green
color. The snndl imbedded hypopygium black ; its outer append-
ages Imve the f()rm of snudl lamella) and are of a brownish color ;
the inner appendages are not distinctly ])erceptible. J"'ore coxaj
l)liickisli, on the front side greenish-blue; their delicate hairs are
])rincipally white, Imt towards the ))asis of the eoxie there are also
eoijie black hairs ; on the tip are black bristles. Middle and hind

SYNAUTiiuu:? — systi:nus.

139

coxrc ))lack ; the fonncr with Itlack hairs and l)rislles. Fore foot yel-
low ; femora iiierassated towards tlieir basis, on the upper side with
a narrow brownish-hlaek longitudinal stripe, reaehinj^' to the ex-
treme ti]); the under side is sparsely frinji,ed with short hlaek
liairs, and where these end, there are three Ijlaek hrislles turned
somewhat baekwards. Fore tibia; et)vered witli thick, rather
coarse, but short hairs. Fore tarsi from the tip of the lirst joint,
whieli is al)out as lonj; as the others, slron<?ly infuseated. The
lirst and second joints l)eset on the under side with short bristle-
like hairs; pulvilli rather larjre. Middle feet yellow; femora
thickened about their basis; the tibia; have Itesides the bristle at
the tip only one on the upper side, not far from tin; l)asis; the
tarsi are very much infuscated from the tip of the second joint.
Hind femora metallic-ji-reen witii yellow tij), at the end of the
under side with a few black l>rist!es. Hind til>iie yellow, oidy
sparsely bristled. Hind tarsi yellow at the l^asis, from the ti[> of
the lirst joint Ijlack-'orown ; their joints (le<'rease in leiijith, the
first considerably lonjier than the second. The cilia of the whitish
te,u:ulie show in most directions a brownish-l)lack colorinjr, while
in some they appear with a yellowish lustre. Jlalteres yellowish.
"Winffs fiTayish hyaline with l)rownish-black veins ; the posterior
transverse vein is straifrht and has a very steep jjosition ; the last
segment of the fourth longitudinal vein shows upon its lirst third
an almost iinpercepUble llexure, otherwise it very little approaches
the third longitudinal vein, runs parallel with it and terminates
precisely in the ape.\ of the wing.

Hub. Middle !Stu^. .. (Osten-Sacken.)

'^11"'

^ .?' :

Gen. XVII. SYSTEXl'S.

This genus, hitherto coiiiined to European species only, may be
characterized in the following manner: First joint of the antennio
without hairs on the npjter side; the second joint transverse; the
third large, ictnger in the male than in the fenude, in Itolh se.xes
broad at the basis, ending into a point, distinctly hairy; arista
completely apical. Feet rather slender, in l)oth sexes plain and
beset oidy with very few and short bristles. The lirst joint of the
hind tarsi without bristles and scarcely half the length of the
second. The sixth longitudinal vein of the wings distinct. The
abdomen of the male towards the tip and laterally much com-

W

■ •!. ■*

Ifffl

liQ

DII'TERA OF NORTH AMERICA.

[.'ART II.

pressed, its last segment mirrow. Tlie basal portion of the
entirely (lisen<riige(l and inlleeted iiypopyji'inni lornis a lonj^
pednnele • tlie <»uter aitpendnjres sir-ratlier lliilorni and whitish,
tiie inner appenchij^^es alst). Tlie last segment of the fourth longi-
tudinal vein with more or less tlexure.

The name of the genus (from avv, together, and ottvof, narrow)
has referenee to the very jiointed shape oi' the third joint of tlio
aatennui, whieh is peculiar to both sexes.

Oen. XVIII. RIIAPIIII Iff.

The first joint of the antennse has no iiairs on the upper side;
the second is transverse ; ♦ ' third glabrous, very narrow, in both
sexes very much elongated, though in the nnde more so than in
the female. Arista entirely a))ical, l)arc ; its first joint somewhat
elongated in the nmle. Scutellum glal)rous. nypoj)ygium small,
rounded, rathe, imbedded ; its outer apjiendages more filiform than
lamelliform ; the inner api)en(lages small ; the first joint of the
hind tarsi without bristles.

The genus Rhaphlum stands in next relatiim to the genera
Po7j)hijroj>s and Xiphandrium. With the species of Porjihijnip.f
it shares the larger size, the greater number of bristles on the
feet, the broader wings, less narrow towards the basis. With the
species of Xipfunxlriiim it has in common the great elongation
of the second joint of the antenuio, the lesser density of hair on
the occiput, and the shorter hair n])on the coxic and feet, also that
the last segment of the fourth longitudinal vein is less inflected.
From both these genera, however, lihaphiiim is distinguished by
the somewhat longer first joint of the aiitenme, which, particularly
in the male, is rather swollen : 'iv the great narrowness and the
glabrousness of the third joiiu, wliich is uncommonly elongated
not oidy in the male but also in the female ; by the glabrousness
of the arista, and finally, by the more narrow and more pointed
palpi of the female. The other genera most closely approaching
Ithophium, as Sysfeniis, Synarthrtis and Smilintiis, cannot be
easily confounded with it, the hypopygium of the male in the spe-
cies of St/.'^tenus being very much pedunculated, the second joint
of the atitennte in the species of Si/narthrus reaching over the
third, and the abdomen in Smiliutus having only five segments.

RirArun.M — xipnANnnnM.

141

The nnme of tlio gt'iius (I'roin ^utioi-, siiiiill iifrdlc) has rofort'iiee
to tlie shape of the untoiimi', which distiiijfiiislK's it.

Only a siiiglt' European and one North American species, de-
8eriijed below, are known at present.

\

I. R. lllgllbre Loew. f- — ^^^ viridi nigrum, nitens. pedibns nigiis,
anttii'iuruiii tibiis iiitern)mli<iiuiu(iue ftiiiioribus lutei.s.

Oreeiiish-Mack, shining; feet black ; the four anterior tibi;e and tbeniidille
femora dusky yellow. Long. (!orp. 0.1 (J. Long. al. 0.1(j.

yvN. lihitjihiinn liii)iil)re Loew, Nnue Beitr. VIII, 4i), 1.

Of a bright metallic, but very dark greenish-black color. Face
moderately broad, with a bright lustre of silvery-white powder
upon l)lack ground. l*al|)i black with white jiowder. The bhu k
antenna.' very long, narrow and glabrous ; the a]»ical l)ristle sl'-n-t
and bare. Front shining black. Cilia uf the npjter orbit l)iack.
delicate, short; cilia of the lateral and inferior orbits white.
Thorax bright, with an ahnost imperceptible gray-whitish dust.
The scutellum has n(» hair with the exception of the usual brisiles.
Abdomen bright, only on the lateral margin with distinct white
})owder ; the hair upon it is black. Coxtu black with white dust ;
the front siide of the fore coxie with white hair and black l)ristles.
Anterior femora l)Iack with luteous tip ; fore tibiie luteous, only
with two bristles on the upper side ; fore tarsi blac.'k, the first joint
as far as the tip, luteous. Middle feet luteous, tarsi from the tip
of the first joint blackened. Hind feet entirely black, only the
knot 4 yellow; the first joint of the tarsi scarcely a little longer
than the second. Cilia of the brown teguhe whitish. Wings
blac] ish, on the fore margin and along the veins darker; the last
segment of the fourth longitudinal vein only in the middle gently
inflected forward.

JIab. Carolina.

Gen. XIX. XIPHAl^DRirHI.

The genus Xiphondn'um comi)rises small species, of slender
form, with little hair. The first joint of the antennic has no hair
on the upper side; the second is of a transverse form, the third
rather narrow, in the male very much elongated and in the female
much slnirter ; the hairs upon it are distinct, especially on the
under side. Arista entirely apical, comparatively short, with

I, ;

■

. I 'I

142

DIPTKKA OF NOIITII AMERICA.

[part II.

soaiTC'ly perceptible short puljesceiice. The lower jjiirt of tlio
occiput only with the u.su;(l f'riiip"e of cilia. 8<'Ul('iiuin witlioiit
hair. Coxie ami feet coiiii)arutively hare, the lallor witii very
few l)ristk's; tiie first joint of the hind tarsi without hristles.
Winj^s not very broad, soinewhiit nnrrowed towards tlie btisis; the
last >('<rnicnt »tf tlie fniirtii long'itudiiiai vein little indectcd ; liypo-
pvfritnn small, roiiiideti, rather imltcddcd, its outer appcndufrcs
more filiform than himelliform ; the inner appendajjes small.

The next related jrenera are lUuijiltiuui awl J'orji/ii/i-oj

IX.

T

characters of the genus Jifidjiliinni have already l)een described
The species of Xiplxindriain differ from the species of J'lD'pfn/rof.^
by their smaller si/e, more slender form, less hair, especially on
the lower part of ti.e occiput and ou the coxie ; the third joint of
the anteiniie of the males is more eiongiited, more distinctly hairy,
l)articularly on the wliole lower side ; the arista is beset with a
comparatively short but easily perceptible puliesceiice ; the wings
are less broad and towards their l)asis still narrower. It cannot
l)e mistaken for the genera Sijs/einifi, SijDnrtfn'us and Smiliofiifi,
as they 'lifYer from Xiiihandrium and Ithaphium hy tlie same
distinctive marks.

Tlie name (from ^c'toj, sword, and dirjp, man) has been given to
this genus on account of the sword-shapc^l antennse of ilie male.

Out of Europe, no sj)ecies of XijiJinndrium are as yet known.
I have a fenuvie from North America, which probably belongs li>
this genus. As it has lost its antennaj, its systematical locatinn
could not be ascertained.

»

■fltti' ;•■

^■As

I

iiL.-''>'

\

Gen. XX. PORPIIVROPS.

The genus Porjifn/i'o^ts com))ris(.'s species of at least middle
sixe, rather stout shape and very hairy. The first joint of the
antennae has no hairs on the u)>iier side ; the second is transverse ;
the third is moderately elongated in the male and shorter in the
female ; the hairs upon it are very short and the whole under side
(with the exception of a few s|)ecies) is entirely bare. Arista
altogether apical with an almost imperceptible and very sh(»rt,
pubescence. The under side of tlie occiput more or less densely
fringed. Scutelhim without hairs. Coxa^ and feet with rather
much hair and bristles. P"'irst joint of the hind tarsi without
bristles. Wings conijtaratively broad, towards the basis only a

i»0HPUYll()P8.

Ui

little narrower; the last sofrinoiit of the fourth longiiudimil vein
niodenilely iiiHeeted. llypopyjjiiiiu simiil, roiiiulcd, rather im-
bedded, its outer a|»iteiuhi>^es almost in all the spceies more I'll-
form than lamellirorin ; the outer ap[)eiidajj:es smul!.

With ref^ard to the mutual relation of the three kindred genera
namely, Jilniphiiim, Xijihundriain and rorj)fii/roj)s, all the re-
quired iid'ormation inis already been furiushed, so that a repetitio \
of their distinetions is not neeessary. I have vindicated the naino
of l'urjtlii/roj)n for this jjeiius in the tifth volume of the Nrue
Heitriige. An entirely unfounded opposition had been raised
against it. The following are the reasons by whieh I hnvc been
governed with relation to the luime rorpliifropn. Mcigcn, in
the fourth volume of his works, luis taken a wider view of tho
genus Porphynqui ami divided it into three sections: 1. With a
subaj)ical arista. 2. With an apical arista; and, J], With an
arista inserted dorsally on the third joint, near the basis. In his
seventh volume he ado])ts the genus Arrjiira, which M. Mac(|uart
had in the meantime established for the first of the three divisions ;
the third division he unites with Mcdeh'ru>i ; and for the oidy
renniiinng second division, which j)rinci]>ally contains sMccies of
the present genus, he retains the mime of P(»r])h!/ro}»- ; at the
same time he uintes with them the species of his genus Ithnphium
(that is the genera lihajihium and XipJiandniim in the sense
adopted above). As I cannot Jigree with this reunion, I am com-
pelled to retain the name of /'orphi/rops for the genus, which
embraces most of the species contained in Meigen's second division
and this is the present genus.

The name Porphi/rops (from jtoptviio. scarlet, and w^, fa<'e) lias
reference to the beautiful scarlet color which is peculiar to the eyes
of many species, especially the males.

The hitherto known species of Porphjp'opit are distributed all
over Asia Minor, Europe, and North America.

' •' > M

•

!

ll^^^^B^^ r

15
1

Table for the determlnutiou of the. Specicx.

( Feet black.
* Feet yellow.

(All t
( Fore
I Fore cox
* Fore cox

All the coxiB black,
coxfe yellow.

cjB not blackened at the basis,
coxffi blackened at the basis.

1 melampus /"•.
2

2 nigricoxa / "'.

:i

3 fumipennia /"••

4 rotundiceps lie.

m

.'i^

144

PIPTKK.V OF NOUTU AMKIIKW.

[r.VUT n.

Dencrl/itlon of the S/iecies,

1. P. llielunipilH LoKw. % iitid 9 .— I'tMlibuH atria, alls iiigricantilius.

I'V.'t liluuk, wings blackixh. Long. oorp. 0.17 — 0.18. Long. al. 0.14

0.15.

BvN. I'oriifii/rops milampns Loi:\v, N«uo Ik'itr. VIII, .')(•, 1.

Male. Metallic bliu-kish-f^roeii. Fuco very narrow, with white
(hist. J'alpi hiack with wliite (lust. Aiiteiiiiu; l)hick ; third juint
ratlier loiij,' and pointed ; arista more than half the lenfrth of the
third joint. Front hiack-ffreen, with white dust. Cilia of the
nj»por orbit black, those of the inferior snow-white. Upper side
(if the thorax shininj?, only on the anterior and lateral niarf,nn with
more distinct white dust; on the former the Itc^rinnin^ of two
darker colored lines is per(.'ei)tible. The scutellum has no hair
besides the usual bristles. The brijfht and dark->^reeii abdomen
has scarcely a trace of white dust ; its last sef?ment is alnntst l)lack.
The hypopvfrium is a little lar^jer than in most of the other si)e-
cies of this ffcnus, brijjht black ; the outer aj)pendages are ex-
tremely snuvll black laniello! frinji^ed with black hair; the brown
interior ap{)cndages are also small, turned a little uj)ward.s at the
end, Imt pointed and uj)on the middle of the lower side fringed
wit!i a few hairs. The hair upon the abdomen is black, only on
the lateral margin of the anterior segments and upon the venter
whitish. Coxie black, with a rather thick white powder, the fore
and middle coxiu with considorai>I(' white pubescence and without
any black bri.stles. Feet Idack ; femora with a trace of blackisli-
green lustre ; the tip of the trochanter, the tip of the knee, also
tiie extreme tip of the fore and middle tibiaj brownish-yellow ; the
first joint of the fore tarsi a little longer than the three following
togetlier, at the end of the under side dilated almost in the sha])e
of a tooth ; otherwise the feet have no particular distinction. The
cilia of the pale-yellowish tegulaj have whitish hair. Halteres
pale-yellowish. AVings blackish, in the vicinity of the second
half of the anterior margin rather bla(;k ; the last segment of the
f )urth longitudinal vein only very little inflected forward in the
middle.

Female. The only specimen which I have ])efore me, strikingly
diflers from the described male in the color of the body ; as all the
other characters coincide jjcrfectly with those of the male, I have
not the least doul>t that both belong together and consider the

m

■■■ I'

mM:

^

jfe^::

In

rolU'lIYROl'S.

14:

(lilVcrcnce in tlio color as only uccidciitul, ns it so often occurs in
tlio Jh>lii;hoj)oih'(lit Fiicc iiiodcrntciy broad, with silvcry-wliitu
(lust. I'ttlpi Itlacli with white dust. AntcnMiu sliort, the tidrd
joint small and uvute ; arista three tiines the lcn;;th ol' ihc antcn-
nie. Front bine with thin white dust. L'pperside uf the Ihora.x
steel-blue, upon the middle and towards the hind inar;fin more
violet. The steel-blue scutelluni uiton its iniildle is also ofa vio-
let color. The alnlomen is dark metallle-j,n'een, its la.U .scj,nnent
rather l)laek-{ircen at the basis, otherwi.se bright steel-blue. 'I'lie
iiuir.s on the fore eoxte are like tho.se of the nuile, only less dense
and shorter; the hair on the middle ti.xie is also whitish, the wi-ak
brisilcs in the vicinity of its tip arc, however, l>lack. The wings
are the same as those of the males, only the blackening of the
second jmrt of the fore margin is stronger and the fourth longitu-
dinal vein with the posterior transverse vein have a darker seam.
Tin- remainder like in the male.
llab. District Columbia. (Osten-Sacken.)

3. 1*. nigricoxa Loew. J- — PecHbus flavis, coxia omiiilms et totia
uigris.

Feet yellow, all tlie coxa) entirely black. Long. corp. 0.22. Long. al.

0.23.
Sy.n. Porjihyrops nigricoxa LoEW, Neue Beitr. VIII, ,>], 2.

FoHitli'. Metallic-green, front, thorax and scutellum very cop-
pery. Face with yellowish-gray dust ; the sejtanition between its
upper and lower part is jiarticularly striking. J'alpi compara-
tively small, black with yellowish-gray dust ; antenna; black ; third
joint ovate; ari.sta Ij the length of the antcniuv. Front with
thin yeilowi.sh-gray dust, t'ilia on the upper orl)it black, on the
lateral and inferior orbits white. All the coxoe entirely black, with
gray dust and whitish hair; at the end of the fore and middle
coxa! there are no ))lack l)ristles. Feet yellow, apical half of the
hind femora black, the last third of the hind tibiii) aiid the hind
tarsi altogether arc of the same color; middle and fore tarsi
strongly infuscated from the root and towards the end black.
Cilia of the yellowish tcgulai white. Ilaltcrcs i)ale-yellowi.sh.
Wings gray, on the fore margin more brownish gray ; the last
segment of the fourth longitudinal vein, beyond the middle, gently
inflected forward.

Ilab. Maryland. (Osten-Sacken.)
10

#1

:f,!ii

140

MI'TFRA OB' NORTH AMF.RK'A.

[I'AUT ir.

:i. V, fiiniiiteniiU Lui:\v. 9-~''"*'>^u^ lliivis, ooxis anticln toti«
roiicolorilnis.

Fuet with the fore coxo) altogothor yi'llow. Long. corp. 0.18. Long. tx\.

0.17—0.18.
8yx. Piirpltijrops/nmipriiiiis LoRW, Nouo Heitr. VIII, 51, 3.

Fcmnlc. Urifyht int'tallie-grcen. Fuci' with pale yellowish*,
frniy dust. I'lilpi lihu-k, witli yt'llowisii-gniy dust. Autcniia!
Whu.'iv ; the third joint suiuil, rounded-ovate ; arista at least three
times the lenj^th of the unteniue. Kntut hlue-frreeu, with a pale
yellowish-}?ray dust. Cilia oi" the ui»per orbit bhiek, those of the
lateral and inferior white. Tlnjra.v with a thin but rather distinet
j^rayish-yellow dust. Fore co.xie yellowish with white hair ; on
their tips anionj? the white luiirs there are a few black l)ristles,
not easily perceived. Middle and hind eo.xie blackish with yel-
lowish tip ; the front side of the middle eo.va; is clothed with white
hair and toward.s the tip with a few black bristles; hind fenioni
blackish-brown at the tij) ; fore and middle tarsi infuscated, black-
ened towards the end; the last third of the hind tibiiu and the
hind tarsi black. Cilia of the pale-yellowish tcuiihe whitish;
halteres ]»ale-yellowish. Winj^s tinjred with browiiish-ffray ; the
last segment of the fourth longitudinal vein gently inllected fur-
ward upon its middle.

Hah. Middle States. (Osten-Sacken.)

I'vV ', ' .■

4. P. rotlllltliceiis LoEW. %. — Pedibus flavls, coxis anticis conco-
loribus, basim versus nigris.

Feet and fore coxie yellow, the latter in the vicinity of the root, black.
Long. corp. O.IG. Long. al. O.lli.

Syx. Porphyrops rotundiceps Lokw, Neue Beitr. VIII, 51, 4.

Male. Bright metallic green. Face very narrow, with silvery-
white dust, palpi black with pale dust. Antenna; black; the
third joint not very long for a nude, rather rounded at the end ;
arista about as long as the ontenuic. Front metallic green.
Cilia of the upper orbit black, of t!ie lateral and of the inferior
orbits white. Upper side of the thorax bright, with very indis-
tinct white-grayish dust. Scutellum in part steel-blue. Abdo-
men bright metallic green ; in the vicinity of the lateral margin
with rather distinct whitish dust ; the narrow last segment rather
steel-blue ; the liair black, on the lateral nnirgin and upon the

m'v^^.

.s'iii.Kiri f».

Ut

itor wliitish.

li

hhuk ; til

VPiitor whitisn. I he siiiiill liy]ni|»yirMiiii hltick ; the exterior iip-
jM'iidiiirt's lire of 11 dusky j,n'uy-y('llo\vi,v|i color, coiiipiinitivrly Iohl',
forlv-sliii|)c(| and split into a sliorirr mid a iiiiirli joiiirtr iiilrriial
liilio ; tlio lionilikc interior appendu^^'s are Idaek and pointed.
Tlie yellowisli fore coMe are npoii tlieir wlicdu liasiil half (»f a
l»ro\viiisli-ldack eolor, and fringed on the front side with loii}?
whitish hairs. There are no black bristles upon them. .Middle
coxa' blackish with ycdlowish tip, the hitler with a considerable
iilack thorn, which seems to be composed of several conti^nioiis
bristles. Hind co.Xie of the same color as the middle coxie. Feet
yellow ; hind femora almost upon the wh(de apical half black ;
hind til>i!e altiioii<rh stroiijr, but not incrassateij, their last third
black. Fore and middle tarsi somewhat infiiscated, their end and
the tip of their lirst joint more dark brown ; the first joint of the
fore tarsi of tluMisnal form, the hind tarsi black. Cilia of the pale-
yellowish te^nliii whitish. Wiiiffs tinp'd with frrny, a little darker
upon the last part of their anterior maririu ; the hist seffinent of
the fourth longitudinal vein gently inflected forward npoii its
middle.

JIub. District Columbia. (Osten-Sacken.)

'"^I^^

''j;i

Gen. XXI. SltllLSOTl^S.

Charactcm. Face in both sexes broad. I'alpi large, concealing
the proboscis. The antenme in both se.xes of a .similar structure ;
the lirst joint on the upper side without hairs; the second of the
usual transverse form; the third joint of difiereiit length in dif-
ferent species, on the under side nearly e.xeised from the root to
the tij); the arista entirely a))ical, the first joint short and stout,
the second, however, long, very slender, particularly towards the
tip. Scutelluni without hair. The abdomen of the male shows
only five segments, whih; there are six in the related genera.
The small rounded liyi)0)>ygium is imbedded and has only very
short apjiendages. All the tarsi are short, esj)ecially the hind
tarsi, the lirst joint of which has no bristles ; the pulvilli of the
fore tarsi of the male are enlarged. The wings are ehuigated, of
rather eipial breadth, and have a distinctly protruding anal angle ;
the last segment of the fourth longitudinal vein is somewhat in-
flected, ends beyond the tip of the wing and runs upon its middle
over a large but flat impression.

•n-

'' r'J'^'ff

148

PirrEIlA OF XOKTIt AMEIirCA.

[part ir.

This genus has been cstablislied l)y Mr. Hiiliday, and, in con-
sideration of the almost swordlike f'»rni of the antenna; of ihe
species which became first know" was called il/«(V /rr/»m (from
ndxai^a, the sword). As <his same name lias already been used for
a genus of ])lants, I liave thought tit to abandon it and to sui)sti-
tute the name of Hniili<ilt(s (from o^iXiwrdj, the pruning-knife,
because the third joint of the anlentue in the two known species
has the form of a pruning-knife).

The two known species belong to the European fauna.

Oen. XXII. AIMIROSIXI'S.

The known species of yl/^/iro,>///(/,s agree in the following, in
part rather striking peculiarities which conslitutc tlu^ character of
this genus. Tlie first joint of the antenna* without hair, the
seccmd of tlio usual transverse form, the third tapering at the
tip ; the arista entirely ai»ical. The face narrowed above, esjie-
cially in the male. The proboscis turned towards the breast.
rali»i disengaged, hanging downward, in the male larger tlian in
the female. The alxlomen of the male shows six segments ; the
siiort and rounded hypopygium ends it in the shape of a knol»;
its exterior appendages are clont>:ated, parallel lamelUe, fringed
with rather long hair. The female abthjmen has only five seg-
ments. Wings of rather e(pnvl breadth ; the posterior transverse
vein is less distant from the margin of the wing, than its own
length ; tlie eml of the fourth longitudinal vein is parallel with the
third. Feet with rather coarse bristles; the first joint of all the
tarsi is much longer than the second ; the first joints of the hind
tarsi without bristles.

The structure of the proboscis and the position of the palpi
distinguish the si)e<'ies of Jjihrof<;/li(.-i sulliciently from all the
other genera of Jtolichojwdithc. Hitherto only European species
have been described.

The name of the genus (fri)m ati'05, the froth, and ovxaw, I rob)
has i"ference to the habit of these species to pursue their prey
along the shores of a surging sea.

Gen. XXIII. TIIIIVOPIIILI S.

Chnrocfers. The face in both sexes broad, m)t reaching as far
as the lower eye-corner, and ending below at an obtuse angle.

■j.

TFiixonnn

-I'EODES.

14!)

Piil)>i ill both soxos lurfro, reposing upon \hv pmlMsris. Aiitciiiiii!
voi'v t-lit»rt ; the lirst jctiiit without liair, tiic second sliort, tnius-
v<'rse, h)n,uTr aliove than below; the tliinl joint circular, tlie bare
arista dorsal. Winji's of ecjiial l)readtli ; the jxisterior transverse
vein is distant from the maririu of the wiiii^ more than its own
IcMjjth ; the last se.u'ineiit of the loiirtli lonji-itudinal vein is rather
liandlcl with the third. The abdomen of the male has six seji,--
nients ; the liypopyjriuni small, rather iml)ed<led, and somewhat
turned inside; its exterior api)enda<r<'s are narrow, jjaraiiel lamelhe.
The abdomen of the fciiiale shows iive seirmeiits, Kemora rathri'
stronjr, the first joint of the hind tarsi without bristles.

The species of I'hiiKi/iJn'lHS are easily distinjruished from the
s])ecies of l)i(ifitrai-uf< l)y the absence of hair upon the lirst jomt
of the antenna' ; from the species of Piixlva they dilfer by the
structure of the face and of the hyi)opy<>:inm.

They live priiicii)ally alonjr the shores of tlie sea, whence their
name (from ^ij, down, sand hill, and ^i.-Koi, friend).

As yet only European species have been made known.

': 1-

Gen. XXIV. PRODEN.

Characters. Face not reachinj? as far as the lower corner of
the eye, rather narrow in both sexes, tlioutrh a little broader in the
female, and more enhu'fred lielow ; the lower marji-in is strai<i'ht.
Pal]»i in the female considerably lar<!:er than those of the male and
ill both sexes reposinjr u]ion the ]iroboscis. Antenme very short ;
the lirst joint without hairs; the second short, transverse; the
ttiiid joint rounded ; arista dorsal, only with a short pubes-
cence. Wings of uniform breadth ; tlie ]tosterior transverse vein
is reiiiovf'd from the inarfiMii of tlie winir more than its own
Icuirlh ; the hist seirnieiit of the fourth lonjritudinal vein parallel
with the tliinl. The aluhjiiien of the male has six scirments; the
short, st'/iit hyj>opy<>'iiiiu is not imbedded, but disenfraire(l and a
little inllectefl ; its <'Xterior niipeiidaii'cs are two small parallel
huuelhe aloiij^side of cacii (ttlicr aii<l with lonu: hair ; the interior
ap]»eiidajres form a rcmarkalily lar<r(' curved Ibrceiis. The abdo-
men cf the female shows live sejiMiieiits. The femora are rather
stronj; ; the lirst joint of the hind tarsi has no Itristles.

Pcodes is closely related niily to 'J'/n'iKi/i/iiluti ; the din'erences
become evident when the characters of liolh genera are compared.

■A

ir)0

DIPTEllA OF NORTH AMERICA.

[I'.VUT If.

'I'lio iiaiiic of tlio froiiu.s (from ntuiijt:, provided with a largo ])ouis)
lias iTfereiico to om- of its most strikliig charactor.s.

Only one Europt'aii species has as yet been made known.

Gen, XXV. M EMATOPROCTIS.

Characters. Antenn* short ; first joint without hair ; second
joint short, transverse; third joint small, in the male not laiticr
than in the female, rounded ; the rather long arista entirely dor-
sul. The faee, much narrower in the male than in tiie fcnnde,
does not reach as far as the inferior corner of the eye. I'alid re-
jtosing ui)()n the prolioscis, those of the female nuich larticr than
those of the nmle. Front of etjual breadth. The lower part cf
the occiput distinctly ))ear(led. Eyes very hairy, especially
towards the lower corner. Scutellum not hairy. The abdomen
of the male has si.x segments; the small rounded, and a little im-
bedded, hypopygium is at its tip ; the exterior appendages are long
and filiform, the interior appendages very short and usually not
distinctly i)erceptible. The female abdomen shows live segments.
AVings a little narrowed towards the basis, the (irst longitudinal
vein not elongated ; the ])osterior transverse vein distant from the
margin of the wing by more than its own length ; the last segment
of the fourth longitudinal vein very gently inflected and towards
the end i)arallel with the third. Feet rather strong ; ]>ulvilli of
the fore tarsi not enlarged ; the first joint of the hind tarsi without
bristles.

The species of Nemafojn'ocfus mostly resemble in their habitus
the species of PorphyrDps ; they differ from them, howevei-, by ww
altogether different stru<'ture of the antenna'; the third joint of
the male being also very short and the position </f the arista com-
pletely dorsal. They are less closely related to the species of
Artii/rn,\o which they were formerly reckoned, as the first joint of
the antennai is without hairs, the third joint of the nmle is not en-
larged, Imt as small as that of the female, the arista not suba.i)ica.l
l>ut entirely dorsal, the first longitudinal vein of the wings not
ehtngated, further, the exterior appendages of the hypopygiuni
Imve not the sha])e of short lamelhc, but of long threads. The
species of XiniatojiroctiDi agree with the s])ecies of LcKcoHfola in
the glabrousuess of the first joint of the antenna) ; otherwise they

4 ■Ifi

LETJCOSTOLA,

151

differ from tliem prceist'ly in the same manner as from the species
Anji/ni.

The name of the genus (from vr^fia, the thread, and rtpwxroj, po-
(h':v) has reference to the threatl-like form of the exterior ap-
pendaffes of the hypopygiuni. The species hitherto known are
all European.

Gen. XXVI. ].EtTCOSTOI.A.

The species of Leuroslola, like those of Aniyra, have usually
upon the abdomen, and often also upon the thorax, a thick hril-
liant silvery dust, which renders them easy to i'ecojrnize. The
lirst joint of the anteinue is entirely hairless, the second is trans-
verse, tlie third bare, rather lartre in the male ; the ai)i)arently
bare and distinctly two-jointed arista is very near the tip of the
antenniB. AV'injrs broad, the jjosterior anjrle rather protrudiiiji; ;
the first longitudinal vein is farther from the margin of the wing
thi'i in most of the other genera, and is also much longer than
usual ; the fourth longitudinal vein is inflected forward before the
middle of its last segment, thence, iiowever, again parallel with
the third ; the posterior transverse vein is not api)roxiinated to the
nnirgin of the wing. The tirst joint of the hind tarsi has no
l)ristles. lIypoj)ygium small, imbecUled ; its exterior appendages
are two small narrow lameihe, bent downward; the interior aj)-
peiidages are of rather simple structure, and often not distinctly
visible.

The c-lose relationship of the genus LeucoHtola to that of Afgi/ra
can e esisily jierceived by a com))arison of their characters. There
is .-ciirceiy any difference between them, but that the first joint of
tiie antenuic of Lcitcoxtohi is entirely without any hair, while in
Arijiira it is distinctly covered with hair.

The niime of tiie genus (IVoni Xfvxo;, white, and sroxr. dress) has
reCereiice to the beautil'id silvery lustre which covers the abdijmen
and sometimes also the thorax of most of these species.

The known species belong in part to Europe and in part to
America.

152

DII'TKUA OF NOUTH AMERICA.

[part iT.

>.r'tv"

a':i,-*,»,..»

'■,*,:

^:Mii

1. I^. ciiigulata Lokw. %. — Viridis, Isete splendeiis, aMomine Kon
lioUino.so, ciiigulis llavis.

Green, brightly shining, abdomen without white dust and with yellow
bands. Long. corp. 0.19. Long. al. OIG.

SvN. Lcticostola ciiKjuldta LoEW, Neue Beitr. VIII, 53, 1.

3[oIe. Fiice very narrow, silvcr\--white. Palpi snow-wliitc.
Proboscis brownisli-blaek. Antoiuiaj blaclc ; the tliird joint
blac'k-lu'own ; the arista inserted close to its tip. Front black
with silvery-whito dust. Cilia of the upper orbit black, extremely
short and delicate; cilia of the inferior and lateral orbits snow-
white. Thorax metallic preen, very britiht, dusted only on the
lateral marfrin. Scutellum of the same color, without hair, besides
the usual bristles. Abdomen without any white dust ; the first
sejrment mostly black ; the second yellowish, transparent, with
metallic black border on the ])osterior niarf«-iu and with an indis-
tiuct blackish spot near the middle of the anterior margin ; third
seirment also yellowish, transparent, and at the basis with a rather
broad violet-black transverse stripe, bisinuated on the hind side,
and with a narrow blaekish-grcen border on the posterior margin ;
the coloring of the fourth segment of the abdomen is the same,
but the bands on the fore-margin and the posterior border are
broader, h» that the yellow ])art of the segment has the ai)pear-
aiice of being divided into two spots ; the fifth segment has no
yellow color, but is violet-black near its basis and black-green
towards the tip. The same color prevails on the small hypo])y-
gium, the extremely small lamella; of which are brownish. The
rather Wng bimt not very coarse hair upon the abdomen is chiefly
black, oidy upon the fore part of the first segnu'nt and upon the
venter it is yellow-whitish. Coxa^ and feet ])ale-yellowish ; fore
coxic with white hair and yellowish-white little bristles. Middle
and hind coxa; near the basis a little blackened and also fringed
with pale hairs and bristles. Femora slender, the hind ones
slightly infuscatcd at the tip on the upper side. The hair u])on
tlie femora is blackish on the upper side and near the tip, whitish
near the basis and on the underside; the very delicate wh'»i^h
hair on the umler side of the fore and middle femora is rather long.
Fore tibia; without any bristles ; middle and hind tibia; only with
rery few delicate and short bristles. Fore and middle ta'-si si mi-
der, but not very long ; the first j(jint about as long as the others

EUTAKSUS.

152}

lakoii tof>:ctlior. Tlio first joint of tlio liiiid tarsi is sliorlcr tliaii
the socoiid and a little stouter, especially towards the tij); it is
frin<,^ed with the usual short hair, which is however unusually
dense upon the latter part of the under side. Cilia of the black
niartrined tegula; yellowish-white. "^'111)^:8 short ami broad ; the
posterior transverse vein strikinjfly far distant from the nuirjiiu
of the winft"; the last segment of the fourth longitudinal vein be-
fore its middle gently inflected forward.

Hub. District Columbia. (Osten-Sacken.)

Ob.serration. — A rather badly preserved female, which I pos-
sess, I su])pose to be that of Levcoi'tola cinifulafn ; it shows, how-
ever, some differences, so that it nuiy belong to some other closely
related species. It differs from the above described male by the
following characters : The face is comparatively l)road and covered
with a dense glittering silvery-white powder. The white palpi
are larger than those of the n)ale. The third joint of the antenme
is very short ; the position of the arista almost apical. The ab-
domen is yellow with the exception of the last segment which is
of a metallic-green color, shows however, when looked upon in an
obli(iue direction, an indistinct greenish lustre ; its penidtimatc
and antepenultimate incisures are greenish-black towards the lateral
margin. The ])osterior nmrgin of tlie pleurie is mit gray, but yellow.
Among the whitish hair of the fore coxse there are a few light-
brown bristles, which, in a certain direction, have a black ai)j)ear-
ance. The tip of the hind femora is not darker and the first joint
of the hind tarsi is of the usual plain structure, however compara-
tively of the same length as that of the described mnles. Other-
wise it coincides with it perfectly. The only character wliich
makes it doubtful whether they belong together is the yellow color
on the hind margin of the pleunc in the female.

Hah. District Columbia. (Osten-Sacken.)

Gen. XXVII. El'TARSUS.

Characters. Face narrow, esjx'cially in the male ; a little
broader u))wards. Palpi very sn\ail. The first joint of the an-
teiHiai without hair, the second much overreaching the third ; the
third rounded ; the arista dorsal, thouu'h rather closely a))pro.\i-
mated to the tip of the third joint, distinctly two-jointed. The
elongated, cylindrical abdomen of the male consists of six scg-

n ^

^ •'

'!-•■

m '

i -

1:

i!

i.it<

154

nil'TKUA OF NUllTII AMKUICA.

[r'R

r ir.

nu'iils; the liyiM»|nMriiiiii is very siiuill, oiitiri'ly imbedded and
witlioal bristles ; its appeiidiiffes are extremely small, almost eom-
j)letely liiddeii. The lemale alt(k)iiieii shows only live se;i'iiieids.
Feet rather lonji:, moderately bristly ; the lirst joint of the hind
tarsi wiliioiit bristles, mneh shorter than llio second; the i»ulvillL
on the fore tarsi of the male are enlarged, but not elongated.
AVings of rather uniform breadth or narrower towards the root ;
the (Irst longitudinal vein not elongated; the last segment of the
fourth longitudinal vein tho\igh somewhat indeeteil, still rather
parallel with the third. J'Jtdarsas a}>i>ears to be nearer related
to Didp/ionin than to any other genus. The striking smallness
of tlie palpi, the faee narrowed belov/, the hypopygium covered
with but delicate hairs, the very small and almost completely con-
cealed a])pendages of the liyi)oj)ygium and the not elongated pul-
villi of the fore tarsi in the nuile distinguish Eittarsus from
])i(i/i/i(tntf< sulliciently. From Xcnui/ojirorttts, whose exterior
appendages of the hypopygium are long threatls covered with
hair, /-Jutartius is distinguished by the snuUl and concealed ap-
pembiges of the hyj)opyginm. The species of Saucrojius cannot
be confounded with the species ul' Uutaraus on account of the en-
tirely disengaged hypopygium.

The genus has been founded upon tlie well known European
Juilai'sus aulicus Meig. The name (from d, handsome, and
■roprxij, foot) has reference to the structure of the feet of the male.

As yet no North American species is known to me, but I know
a species from Venezuela, the liind tarsi of the male of which
have a remarkable structure, and of which 1 furnish a descrii)tion.

1. E. eques, u. sp. %. — Clialylnnis, niodice niteiis, alxlominis ex
■iMieo iiigri maculis latoralil)us, ventre iXMlibusqiK^ llavis, feinorilms pos-
ticis supra til)iis(jue posticis totis fuscis, tarsis auterioribus priPter
basiin, posticis totis nigris, articulo hoium priiuo brevissimo, quarto in
aculeum prodiicto.

Stoi'l-l)lue, moderately shining; lateral spots of tht^ bronze-black abdonieii,
venter and feet yellow ; upper side of the hind femora and the whole
hind tibiie brown ; the four anterior tarsi with the exception of the root,
and the whole hind tarsi black; the lirst joint of the latter very short,
the fourtii joint produced into a point. Long. corp. 0.27. Long. al.
0.2(i.

j\f(ile. Front shining steel-ldue, not very In-oad, not excavated
ou the vertex. Antemue only of moderate length, black ; the

m

k-\\'

ELTARSUS,

l->5

jiarrow mid a little oloiifjated lirst joint is entirely l)are on the
upper side, on the lower edjre of a ratiier distinctly reddish-yellow
color ; the third joint is short ovate ; the arista is inserted upon
the baek of the third joint, nearer to its basis than it is the case
with t'uldrsK!^ aiilicu.-^. The face is very narrow ininiediately
below the antennie, and jirows more and more so till it becomes
ouueiforni, so that the larjj,e eyes are entirely conti}i:uous on a lar^e
extent. Palpi very suudl ; proboscis rather small. Thora.x steel-
blue or violet, little shininji', ujjoii the shoulders more blnc-;^i',.cii
and more densely covered with dust; the extreme cornea' of the
shoidder brownish. Scutellum of the same color as the upper
side of the thorax and with two bristles. ^Metathorax and ])l('ura!
black-green, the latter with whitish dust and a yellow hind mar-
gin. Abdomen eylintlrical, blackish bronze-colored ; the second
segment has near the basis a narrow yellow transverse! stripe,
which is somewhat dilated near the lateral nnirgin ; and upon the
hind comers a large yellow spot ; there are similar spots, but
diminishing in size, upon the other segments. The sninll liyp(»-
l)ygiuni is rounded and rather imbeddetl ; its apj)endages an;
short, indistinct lamellio. The short hair upon tin; abdonn-n is
black; longer black l>ristles only on the hind mai-gin of the first
segment. Coxa- and feet yellow ; fore coxie with \nik' hair, at the
tip oidy with a few thin I)lack little bristles; middle coxa' with a
large black spot, which covers about three-(puirters of their (uiter
side ; the hind eoxse with a small blackish spot. The hind femora
on the upper half of their hind side blackish-brown ; fore and mid-
dle tibia; only at the extreme tip slightly infuscated ; the hind
tibia' totally black-brown. The fore tibiie are without l)ristlcs;
the middle and hind tibiie are but sparsely beset with short bris-
tles. J'Ore and middle tarsi from the tip of the first joint l)lack-
brown, ])lain ; the first joint of the fore tarsi is .somewhat shorter
than the following taken together, the first joint of the middle tarsi
longer than the others taken together. The hind tarsi are bla<'k,
very much shorter than the hind tibitu and of a very pecidiar sti'ui-
ture ; the first joint is remarkably shortened, the second 4 j the
size and the third 2h the size of the first ; the fourth joint has only
the length of the first, its end, however, is produced into a stout
thorn, so that with it this joint is not much shorter than the third ;
the fifth joint is not at the cud of the fourth, but attached on its
under side at the place where the fourlh'joint begins to be pointed ;

ii

i

'

j^^^Uj

,

.'>■■;. I ■

;• i

lofi

DII'TKHA OF NORTH AMKUICA.

[i>ai;t ir.

oi) )»uili tarsi if is nillici" siiijiiiliirly jit ri.trlit tuij-lcs with the foiirtii
joint, is soiiicwiiat loiiiriT than tho tliird Joint and Iuik the I'oiin of
a sit'ndcr cliil). Tho {jrayish-liyaline \viim:s arc nitlier hn\^ and
narrow; llicir anal anjile is rather rounded nil"; tlio last sofrnient
of tho fonrth lon^;itndinal vein runs upon its iniddlo over a dis-
tinct convexity of tho wing and is there a little inflected ; towards
its end it does not mnch approach the third lonp-itiidinal vein,
which is here very gently carved hackwards ; the sixth longitndi-
nal vein becomes entirely indistinct at a considerable distance
from tho nnirgin of the wing.

JInJ). Veneznehi. (Moritz.)

Ohftrr I'd lion. — Altlntngh tho present species differs in some re-
spects from J'Jiifarsiis aKlirUf!, still it coincides in nnniy imp(»rtant
characters with it, so that it cannot bo located into any other
genns, nnless, rather preinatnrely, a new gonns is created for it.
J'Ji(/(irsKi< nulicHti approaches the forms which prevail in the genus
Diaphorus more than the above described species.

Gen. XXVIII. DIAPHORUS.

At the time of its adoption, and long after, tho genus Diaphorus
was considered as one which was very distinct from tho genus
Clirynutiis. The characters which Aleigen uses for tlieir dis-
tinction are the following : for Chrysotun, arista apical, the eyes
of the nude contiguous under the antenna}, and the wings some-
M'hat divaricated when in repose ; for Diaphorus, arista dorsal,
eyes of the male contiguous on the front, and the wings reposing
upon each other when at rest.

The more species of these two genera have become known and
the more carefully they have been examined, the more unsatisfac-
tory Meigen's characters have been found. North America is
particularly rich in species belonging here, but showing important
structural deviations.

Besides the species showing a different structure of the thorax,
and which were formerly classed with Chrysotus, but are uinted
now in the genus Chri/Hotimiis, the other species of Chrysotus,
agreeing in their habitus, are divided in such, the males of which
Imve eyes contiguous under the antennix?, and in such, where the
eyes are separated by the sometimes broad face ; the position of

kLSI^'i.'iiii

DlAPIIOIirS.

l.u

the arista is likewise by no inciins nlways npionl ; on the contrary,
it is even subapieal in the majority of tlie species.

The same happens to be tlie case witli J)i(i]>horiiff, wlierc the
eyes of tlie males are contifjuons npon the front in some of the
spef'ies only, while in others they are separated by the broad front ;
ih"i arista likewise is not always distinctly dorsal, bnt in iiiany
species snl)api('al, and in some truly apical. Thus nonr' of the
distinctive marks, which Meijren had established for these two
genera, holds good, except for (Jhrysotus, the wings divaricated
in repose, and the parallel wings for Ih'apfiorutf. As this churac-
ter can only be observed on living specimens, it is, even if proved
to be correct, entirely iasullicient for a systematical distinction of
both genera.

In order to escape this difficulty there arc two different ways to
be followed : either the species, with the eyes of the males not
separated upon the front, must rcnuiin with Diajihorua, and those
the eyes of which, in the male, are contiguous below the antennic,
must go with Chrynotua, and a new genus must be estal)Iished for
the species of Diaphornn and Chrijiiotus, the males of which have
the eyes distant above as well as below the antenna'. The other
way to follow would be to discover characters for the <listiii('tion
of (j'hrijsotus and Diaphorus better than those which Meigen had
chosen.

The first of these two alternatives is liable to serious objections.
The establishment of three genera would disconnect the relation
naturally existing between the insects forming them, a relation
based upon their general habitus, and their distinction would con-
sist in a character pertaining merely to the male. Therefore
nothing remains but to try the other way.

If we compare first the species of Chrysotus, in which the eyes
of the males are contiguous under the antennai, with those of Dia-
phorus, where the eyes are not separated on the front, we will
observe the following distinctions : The structure of the body of
the species of Diaphorus is more slender, the abdomen esiiecially
is comparatively narrower, and more elongated ; the hypopy-
gium of the male has on the hind side four bristles of rather
striking size ; the feet are longer, the pulvilli of the fore tarsi in
the male are not only enlarged, but considerably elongated (with
the exception of D. nigricans Meig.) ; the wings of iJiapho-

1

till

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, .,-1 1

. .tt!

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ins

DIPTEUA OF NdUTII AMDIUCA.

[I'AltT II.

\- Vt

j^^plt'

Mj^'l>^

l^p

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lil.'f.'-V.k;

Ijv;' ;■■■':.':

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m^.. ^

?v/.s' nro oompnrntivcly liii'frcr, and Imvc a dillVront outliiio, bccauso
the anal aiifrlo is more protrudiiij^.

If, separating the typical siiccies of Diaphoritu from the typical
spct'icrt of Chri/Hotus, we follow out these characters throu^ih a
series of those species, whicli, notwithstanding the sei)arali(in of
tlieir eyes upon tla; front, are pliiccil into the genus Ih'ajihdnis,
on account of their general lial)itus which nppronches the typical
species of Jfidp/inriin, we find that tiiose among the ahove nicii-
tionecl nnirks of distinction, which are peculiar only t(» the males,
hold also good among these species; at least I do not know
of atiy species which, being placed on account of its general
luibitus among the species of /Hfiphoriis, had not on the pos-
terior end of the liyi)opygiuni bristles of irreater length and
remarkable strength, or in which the pulvilli of the fore tarsi of
the nia!(> were not elongated.

It i< dillcrcnt, however, with tliosc marks of distinction whicli
belong to b. 1 sexes, as also with the more slender form of the body,
.the greater length of tin; feet, and the more projecting anal angle
of the wings of the species of IMaplwrus ; each of these charac-
ters gradually fades away from species to species so that, taken
singly, these characters are utterly Insullicient to decide whether
a s]tceies belongs to Diaphorux or to Chrymtus. As it hap))ens,
however, that where one character decreases, another one liecomes
more salient, it follows that in their totality they are suilieieiit
to distinguish the fenndes of both genera, with the exce])tion,
j)erlia})s, of a few is(dated cases. In doubtful cases it will be well
to compare the deseri])ti<in of the species of both genera.

The character of the genus DiojJiortis may, therefore, l)e estab-
lished, as follows : Form of the body rather elongated. Eyes
of the male never contiguous on the lace, in some si)ecies sepa-
rated upon the front, in others not. Antenna) short, the first
joint bare, the second transverse, the third short, distinctly hairy,
with a dorsal or subapical, rarely with an apical arista. Wings
rather large, with strongly projecting anal angle, and thus usually
somewhat broader towards the basis; the posterior transverse
vein is either a little beyond, or in, or before the middle of :lie
wing, never close to the margin of the wing ; the last segment
of the fourth longitudinal vein is almost straight, or but gentl\
inflected, seldom interrupted, so that its end is thus more ap])ro.\i-
mated to the third longitudinal vein, without, however, converging

I)IAI'II0RU8,

1;V.)

towards it. Feet rntlicr Iniifr, l)iit not very slrndcr; tlif first joint
of tilt' liliul tarsi wii'iout bristles; the jtiilvilli of tlio fun tarsi
eloiigatod in the niah'sof all spocics ; in llic iiiak's of soiuc >i)i'ci('S
the same is tlic ease with tlie pulvilli of tlie middle tarsi ; in some
with the iMdvilli of all the tarsi. '|"h<' hyi>o|»ygiiun small, indied-
ded, on the jjosterior end with stouter bristles.

The name of the genns (frmn ai«>o, oj, dilVerent) si<rni(ies nothirifr
nil re ImiI that the species on whieli tliis geims was estahlished were
remarkaltly dilVerent from the species of previous genera, and id
therefore not at all eharaeteristie.

The known species of J>ici}jlwri(s are found in f'nrope, Asia,
Africa and America.

Table /or the dctcrminatiou of the Specien.
Color of the body non-metallic, black.

4

4

6

1 opacuB
2 mundus

I

Color of the body ui«tallic-green.

I'Y'et entirely yellow.

Keet not entirely yt'llow.

Tegul.-e with black cilia.

Tei;ul!e with whitish cilia.

Kyes of the male contiguous. 3 spectabilis

Eyes of the male not coiitigiiou-S.

All the tibire yellow. 4 sodalis

Only tlie first half of the four anterior tibia' yellow.

f) lamellatuB, nov
La.st segment of the fourth longitudinal vein not interriiiitcd.

(I leiicostomuB
Last segment of the fourth longitudinal vein intfrrii|it.d.

7 interniptus

l.w.

:i
4

l.w.

sp.

l.w.

Lw.

Systematical arraiKjemint of the Species.
I. The eyes of the male contiguous upon the front.

1. opacus l.w. 3. spectabiliB Lw.

2. mundus Lw.

II. The eyes of the male not contiguous upon the Iront.

A. The last segment of the fourth longitudinal vnin not interrupted.

4. sodalis Lw. C. lamellatus, nov. np.

5. leucoBtomus L.w.

B. The last segment of the fourth longitudinal vein interrupted.

7. interruptus Lw.

■' 'mn

i

s

rfi!4:-l

100

l)ll'TK.Il.V OF NolVni AMi;UI( A.

[I'AitT ir.

DeHcrijilion of the S/ieclen,
r. TlIK KYK8 OP TIIK MAI.K CONTIOroJ S I fON TIIK FRONT.

It l>. opacilH Ldi'.w. % . — Toturt iiigtT, tibiirt picois.

I'hitin-ly black, tiliho pitcli-brown. Long. torp. 0.12. Long. al. 0. Ill—
(t.i:{.

SvN. Diiiphnrm opncm Lokw, Neue Heltr. VIII, .'id, 1.

Mdlf. Entirely Itliiclc. Kaco with tlu; )»iii|M and the jti-Dlioscis
Itlark, t'litircly ^iiild'dus. Aiitciiiiii' black ; third Jniiit small ; |tiisi-
tiou ol'thc arista iiioro subapical than dorsal. 'I'hc cyi's arc com-
l»lctcly contijrmius on the nppcr jtart of the f'rniit ; iniiiiediatcly
above the antciinic a bro\vni<h-blaek, oitaipic, trianiiiilar spot lies
between tlicni. Vpper side of tiie tlmrax and of the scutelluni
covered with brown dnst and opacpie. The dnst up(tn the black
))leiira! is more <i;ray-brown and less distinct. The abdomen
shining Itlack, covered with black hair; the stron<rer bristles on
the pioterinr ])art of the hyixtpyji'iuni very striking-; its exterior
appendnjres very snmll, l)lack ; coxa; and femora Ithick and witli
))lack hair; fore and middle femora on the nnder side with a row
of sparse, erect, not very lonj^ lilack hairs ; on the under side of
the hind femora there are sinnlar black little hairs, which are less
erect and somewhat lon<fer otdy towards the end. Fore and mid-
dle til)iiu more yellowish-brown; hind tiltia' dark-brown. Fore
tarsi slender, the first joint as lonjj,' as the followinii' three tojirether;
a j^'reat i)art of the first joint is yellowish-brown, its tip with the
rest of the joints black-brown ; ])\Uvilli not very much enlarf^'cd
and only moderately elongated. Middle tarsi black-brown with
vellowish-brown basis; hind tarsi entirelv Ijlack-brown. Halteres
and tetruhe black ; the cilia of the latter also black. AVin«rs snioky-
))Iackish, towards the anterior margin darker; they become visi-
bly broader towards the basis ; posterior transverse vein but little
before the middle of the wing; the first longitudinal vein reaches
almost as far as the middle of the anterior nmrgin and is .some-
what distant from the latter.

JIab. New York. (Osten-Sacken.)

Oh)icrvafion 1. — D. opanis is very closely allied to the Euro-
pean ]). nnjrivana. As I have oidy one specimen of the former,
1 am unable to prove the coincidence of both species in all the

pi J ■:■:. j:

ItlAtMDHUS.

lAl

liiiistif cliiiruflcrs ns fully us it is ncrcssarv when mi Aincricaii
>)tffics is In liu ri'n)jriii/.<'il ns iilcniinil witli u l']iirii|M'iiii sin'cics.
Nt'itlici' niii I iiiciitinii liny n-linltlc rluiriictors I'm* llus (listiiiction

til'ltulli species. I liejieve tiiilt tlie eXilinilltUioli of 11 iitr^el' lilllil-
I'er of speeinielis will eslaldish tlieir identity.

OliKcrrafiitn 2. — I hoiieve I kimw the female of P. oporii!*, nm
Intwever not certain, t)ii aeeoiint (tf tin; smaller leii^'lh of the lirsl
liiii^iliidinal vein ami the ])alei' coloring of tiie liiml til)ia>. The
jiroboseis of this female is remarkalily stout and |»rolriidiiijf with
a Mattened tip; palpi rather lar^'e and limad. Face with an
almost impereeptihle urayish dust, with a distinet transverse swell-
iiiir upon its middle ; front with ^■ray-l)rown dust and with a trans-
verse furrow below its middle; all the tibia* yellowisli-lirown,
vvin;i's tinned with a dusky blackish color, tlioiin'h not s(» much as
in the above described male, and towards the fore mar;!'in not
much darker ; the lirst lon^-itiidinal vein reaches ultoiit as far as
the middle between tlici extreme root of the wintrs and the end of
tho second lon«;itudinal \v\i\. All the rest as in the male.

JIab. reniLsylvania.

jt 'Ik.

t:.

\

*2. D. lllUlldlls LoRW. % and 9. — Laotn viridis, j^'dilius totis tlavis.

Light inttailio greeu, all the feet yellow. Long. corp. 0.12 — 0.13. Long.
al. 0.12—0.13.

Syx. iJinphorns mnndns Loew, Neue Beitr. VIII, .'57, 2.

Liffht .metallic <rreen. The face has a bluo-fjreen, but little
shiniiifr, ground color, which is riither concealetl by the distinct
white dust ; it is somewhat broader in the female and has a dis-
tinct transverse swellin<r. I'alpi yellowish-brown, niinli laruer in
the female and l)lackened to a considerable extent towards the
basis. Proboscis dusky yellow or yellowi.sh-brown. Antenme
brownish-yellow; the small third joint more infiiscated ; the arista
almost apical ; the eyes of the male meet comi»letely on the upper
part of the front, while they are separated directly aliove the
antenme by a trianjrnlar sjiot of white dust. The front of the
female is of entirely uniform breadth, only very little excecdinj;'
the breadth of the face, has a blue-green, scarcely a somewhat
shining ground color, and i.s covered with yellowish dust. The
cilia of the upper orbit are black and, on account of their brevity,
11

til

hvfV

m

i

ir.2

DIl'TEIiA OF NdllTH A>:i:ilirA,

[part u

hut cliiricnlt to perceive; llie cilia of the lateral and inferior orbit.s
are whitish. Up])' ' side of the thorax and of the seutelluni j)ale-
jrreen, with nietallie lustre, covered with rather thick oehre-yeliow
dust. Alxlonien somewhat (hirker metallic green, often more gold-
green, or coppery-hrownish. The bristles at the end of the liypu-
])ygium are not very long; its exterior appendages brownish and
very small. Co.xse and feet yellow; the first two-thirds of t lie
middle coxiu blackened, the hind coxic near the basis infuseated.
The hair on the feet ai)pears black; when seen by a reflected light
it changes on the til)iie to brownish and on the larger ])ortioii
of the femora to fallow-yellowish; the root, a part of the under
side of the femora, also the fore coxse are distinctly falh)w-yel!uw-
ish. The tarsi are scarcely a little infuseated towards their ti()s.
though their last joint is of a dark brown color. In the nuile tlie
])ulvilli of the fore and middle tarsi are consideraI)ly enlarged and
elongated; the ])ulvilli of the hind tarsi are much less sn
Ilalteres and teguhe yellowish with black-brown cilia, which in
some directions have a yellowish lustre. Wings grayish-hyaline.
on the anterior half usually somewhat yellowish with y»dlowisii-
brown veins; they are rather large and towards the biisis a little
broader, but their greater breadth is not so n(>ar to the posterior
nuirgin as in the previous species ; the ])osterior transverse vein
is not nearer to the extreme tip of the wing than it is to its root
and the first longitudinal vein reaches scarcely above the hrst third
of the length of the whole wing.
JIab. Pennsylvania.

iigl^

3. D. spectallilis LoEW. %. — Aeneo-viiidis, f«n)oril)US uigris, tibiis
tarsorumque omnium basi tlavis, ciliis tegularuiu iiigris, oculiu maris in
fronte contiguis.

Bronze green, femora black, tibiae and the root of all the tarsi yellow, cilia
of the teguloe l)lack, the eyes of the male contiguous on the front. Long.
Corp. 0.13—0.17. Long. al. O.!.*)— O.ltJ.

Stn. D-'nphorus spectahllis Loew, Neue Beitr, VIII, .IT, !5.

Dark metallic-green, thorax and abdonu'u more bronze-green,
the former sometimes more coppery. Face blue-green with thick
white dust, which conceals considerably the ground color. I'aini
and proboscis black. Antennie black, small; arista almost com-
pletely apical. The eyes meeting u])(ui the front to a large extent
and sei)arated oidy b} a very small triangular spot, immediately

in APIIOUT^S.

in3

above tlie antcniiic. Cilia on tlu' upper urbit l>hu'l<, on the lowci-
and lateral orbits white. Upper side of the thorax and senlelhiin
covered with yellow-hrovvnish dust. The stouter l)ristles on the
posterior end of the very small hypopvffiuni rather strikiujf ; hi
exterif)r appendages brown and verysinall. ('oxte black and wit!i
whitish dust; the hair on the lore eoxie ap]>ears in most direclioii.;
black, in others fallow-brownish. Keniora lilack, somt^what witii ii
green redection ; the lip of the Wn'c and middle femora lirownish-
yellow; their black hair, even on the under side, neither of con-
siderable length nor density. Tildse browidsh-yellow, ratiier
slender, \vith a few liristles. Fore tarsi very slender, from the tip
of the first joint black-brown, though the; basis of tiie second joint,
is again paler than the tip of the first ; their lirst Joint is as long
as the other four together; the pulvilli are M'vy much cnlai'gcd
and elongated. Middle tarsi of an entirely similar struct iirc, ui'
the same color, but their judvilli are somewhat less enlarged ;
hind tarsi from the tip of the first Joint black-brown, their pulvilli
but very little enlarged; the yellowish teguhe with blackish cilia,
which assume a yellowish glitter in a rellected light, llaltcrcs
yellowish, the tip of their knob usually somewhat iiifus<'iilcd.
Wings tinged with gray, with blackish-brown veins, along which,
in faded specimens, there are blackish-bntwn margins; they an;
broad, though their greatest breadth is not very close to the pos-
terior angle; the space between the third and fourth longitudinal
veins is rather wide ; the last segment of the latter shows a very
gentle flexure ; posterior transverse vein rather long and somewhat
beyond the middle of the wing; the first longitudinal vein reaches
somewhat beyond the lirst third of the whole lenglh of the wings
and is not very far distant from the anterior margin.
Ilab. District Columbia. (Osten-Sucken.)

■'i »;¥"

■■■"■' ■ ■ «;

.%.

•

H!

V, ..' r,

I"-

r

1

r '■ ■);

; '.i-'

II. The EYK.S OF THE MALE NOT CONTIOT'OIS WON THE KlloNT

A. Th« liist segment of tlit^ fourth longitudinal vfiii not iiitiMTUpteil.

4. D. HOdalis Lokw. 'J, and 9- — Aeneo-viridis, fciuorilms iiiiiris,
tiliiis ornniluis tarsornmqne antfrionim basi flavi.s, tarsis jiosticis totis i-x
nigro fu.sci.s, (uliis tegnlarutn nigris, otuilis maris in fronto scjtaratis.

Bronze-green ; femora lilack; .all the tiliiie and tlie basis of the four antf-
rfor tarsi yellow; all the hind tar.si black-brown; i;ilia of tbe tcgiil.H

• ^- ' .1*

.41

■" i a\

1G4

DIPTKUA OF XOUTII AMKRICA.

[PAIIT IT.

black; eyes of the male separated upon the front. Long. corp. t>.14 —
0.15. Long. al. 0.15.

Syn. Diaphorm sodalix Lof.w, Neue Beitr. VIII, 58, 4.

Kiitlier (lark int'ttilli(.'-p,Tt'oii, tlio alxlouu'ii and .sometime.-^ al-io
the thorax more bronzo-fjroeii, the t-'(;.ti'lhiin in one .specimen violet
upon its middle. Face of the nude ofunirorni l)rea(lth, fiTeeii-hiue
witli thi('i\ wliite dust; tiie face of the fonnde visil)iy broader,
more green, with le.ss lust, below the middle with a transverse
swellinjr. Pali)! of the nnde whitish, oidy near the extreme basis
somewhat blackish; the palpi of the femalq much larger, oidy at
the tip dusky-whitish, otherwise l)lackish. Antennse small, l)iaek,
with an ai)ical arista. Front of the male of uniform breadili,
somewhat exceeding the breadth of the face, blue with yellow-
brownish dust, and green and shining upon the vertex. The front
of the fenmle is considerably broader, more green and less thickly
dusted, the dust has in the vicinity of the antenna- a whitish
api)earancc. Cilia of the upper orbit black, those of the lateral
and iiderior orbits whitish. Thorax distinctly, but not very thickly,
dusted. The coarser bristles on the posterior end of the snuUI
hypopygium are less striking; the very small exterior a})pendag(>s
are ln'ownish-black. s^oxie black with whitish dust ; the fore coxa;
indistinctly dingy v '..te-yellowish at the tip; the sparse hair on
the front side pale, but the bristles of the tip, black. The tro-
chanter of the fore and middle feet dusky-yellowish, of the hind
feet more brownish. Femora black with green lustre; their black
hair is comparatively short; oidy on the under side of the femora
of the male, very closely to the tip, a few somewhat longer bristle-
like hairs. The tips of the four anterior femora and the tibiie are
brownish-yellow, but the tip of the hind tibiic is rather dark-
brown. The fore tarsi of the male are slender and elongated,
brownish-yellow at the root, then gradually becoming more infus-
catcd ; their first joint is about as long as the two following taken
together; the pulvilli are but moderately enlarged and elongated.
The middle tarsi of the male are of the same color as the fore
tarsi and of the same structure, Itut the first joint is almost as
hmg as the f<dlowing four taken together, and the pulvilli are not
so much enlarged and less elongated. The fore and middle tarsi
of the fenmle correspond in color with those of the male, are, how-
ever, considerably shorter, have no enlarged pulvilli, and the first

;■;■"'
.J- (

vii

tl''

PIAPIHiRlTS.

ii;5

^■■\m

juint of tlic foro tarsi is about ('(jiiiil in i('iit!;tli to nil tlio otlior Jnints
logi'lliL'i". The short, hind tarsi arc in Ijoth sexes dark l)lack-lirii\vn.
Cilia of the wliite-yellowisli teji'iihi' Ijlack. ilalteres \vliile-ye!l((\v-
isii. Winsrs tin^-ed with trray, with l)lack-i)rowii veins, wliicii are
inaririned with dusky in faded specimens; they are rather lar<i'e
and broad ; their greatest breadth is dose Ijefore the middle ; tlie
posterior transverse vein lies in the middle between the extreme
root and the extreme tip of the wing; the fourth longitudinal
vein is Honu'what distant from the third one; the first longitmlinal
vein is comparatively dose to the nnirgin of the wing and scarcely
reaches <jne-third of the length of the wings.
JIah. New York.

a. D. lailicllatlis, nov. sp. 'J,. — Aencri-viriili:^, pe(lil)Us iiigris,
tiltiarnni aiiteri<iruiii diniidio basali llavo, ciliis ti'gulaiuiu nigiis, ot:ulis
maris in fronte si'paratis.

Bronze-green ; feet lilack ; 1)asal half ot" thf four anterior tibia; yellow ;
cilia of the tegula; l)lack ; the eyes of tlie male separated upon the front.
— Long. corj). 0.13. Long, al. 0.14.

Dark metallic-green, the ctihir of the scutellum somotinies more
blue and that of the alxlomen more coppery. Face with thick
whitish dust. Palpi small, whitish and fringed with a few black
hairs. Anteniue small, black ; the arista subapical. Kyes separated ;
front much mirrower than the face, broailer below than almve, and
covered with thick white dust. Cilia of the upper orliit l)lack, of
the lateral and inferior orbits whitish. Thorax, though "Itli dis-
tiiu't, l»ut very thin brownish-yellow dust. On the jxtstcrior einl
of the hypopygium there are six bristles of remarkable strength.
The l)r((wnibli-black exterior appendages arc of nuu'li larger size
than in the kindred s])ecics ; they are elongated spatule-shaped,
very inirrow at tlu' I'oot, rounded at the tip and fringed with.
blackish Iniirs. C )Xie and feet black ; llie trochanter of the fore
coxa', the extreme tip of the four anterior fcnmra and basal half
of the four anterior tibia; yellow. The hair upon the feet is black,
on the under side of the hiinl femora elongated ami more dense
towards their lij). The pulvilli of the fore tarsi are rather un-
commonly elougate<l, while tho.se of the middle tar;-' exhibit oidy
a small elongation and those of the hind tarsi none at all. Cilia
of the white-yellowish teguhe black, llalteres white-yellowish.
Wings gray with brownish-black veins, rather large and broad ;

"fffffir

ir.f,

DIl'TEKA OF Nulixn AMKUIC'A.

[I'ART rr.

tlicy liave their f^roati'st hrcndtli soiiiowliat before their inichlje;
the posterior triiii.sver.se vein is iu tiu; middle between tlie extreme
root iiM(l the tip of the win,L''s ; the lirst louf^itudiiial vein runs al
least as far as tiie tliird of tiie leiiji'th of the wing.
Hal). Middle States. (Usten-Sacken.)

mm

6. I>. leilCOStolUUS LoEW. % and J . — Laute viriilis, thorace ft
scuIhHo intenlum Cijeruleacontibus, tegularuiu cili).s albidis, vena loiigi-
tuilinali (luarta nou iuterrui)tti.

Lii-'ht greeii, thorax and scuti'lhun sonietinies more lilue ; cilia of tlie
tegtihe wliitisli, tlie fourth longitudinal vein not interrupted. Long,
eorp. O.Oit— 0.10. Long. al. 0.1 '.2.

f^v.v. Diaphurns liuroslDiiius LoEw, Neiie Beitr. VIII, 58, 5.

Mdlr. Li<;'ht green, metallic, shining, thorax and seutelliim
sometimes sky-blue. Face for a male very broad, deei)ened length-
wise, without transverse swelling. s(v thickly covered with snow-
white diist, that the ground-color becomes invisii)le. Palpi
protruding, inucli larger than in the males of other species;
l»rolK)scis very snndl, black. Anlenme black, larger than in other
species; the third joint is ])articularly distinguished by its more
consideralde size and is cxtcnde<l at tlm end iido a short ])oiiit ;
arista inserted on the upjier side before the tip of this point, hut
so much bent downwanl as to I)e easily ndstaken for being apical.
Fr(jnl of uniform breadth, scarcely exceeding that of the face.
I)lue with white dust, which is thicker near the antennte and is
almost totally wanting n\un\ the vertex. Cilia of the upper t)ri)it
black, those of the lower iuid lateral orbits whitish. Thorax with
thin gray-whitish dust. The bristles on the jtosterior nuirgin of
the small hypopygium rather long and strong; its outer appen-
dages are not distinctly visible. Coxio black, the foremost dusky-
whitish at the tij), on the front side rather bright blue-green and
fringed with whitish hair, but without black hairs or bristles.
Femora metallic l>luc-green with yellowish tip, with very short
hair. Tibiie ami tarsi yellowish, the latter towards (he end gradu-
ally somewhat darker, but oidy their last joint brown ; fore til)ia^
without strong bristles, middle and himl tibite with a stronger
bristle on the exterior cd'fCH of their uj)i)er side and n(»t far from
the root ; the hind tibiie, on the c t> rswi edge of the u]»per side,
are sparsely Ijeset with shortei I'v-l weake; );,';!jtles. Fui ..' tarsi

J •

DIAPIIURLS.

ii;t

loiijf iuid slender ; their iirst joint about as long as the other throe
together, the pulvilli (•(iiisiderahiy enlarged and elongated. Middle
tiirsi like tla,' fore tars' and of a similar color, but their Iirst Joint
about as long as the other four together, and the j)ulvilli not
({uite so large and not ([nito so elongated as t)n the fore tarsi.
Jlind tarsi more infuseated, only the root of the first joint l)ro\vn-
ish-yellow. Tegnhe whitish with whitish cilia. JIalteres also
whitish. Wing.s hyaline, but very little tinged with gray; veins
i)rown-blaek ; the jtosterior transverse vein rather e.xactly in the
middle between the root and the tip of the wing; the Iirst longi-
tudinal vein reaches but very little beyond the third part of the
length of the wings.

Fi'iiKile. Face very little l)roa(ler tlnin in the male, with thick
white powder, although apjx'aring gray on account of the appa-
rent dark ground-c(»lor ; it is somewhat deepened ujiou its larger
up]>er ])art and gently convex upon its snndler lower part ; both
parts are divided by an imperfect transverse swelling. J'alpi
whitish, near the basis somewhat gray. Antenn;e considerably
.snndler than in the male, the third joint much snuiUer, rounded,
with an almost inii»erceptible angle below the insertion of the
arista. Front inor.' broad and more green than in the male.
Tarsi shorter and usually somewhat nn)re infuseated than those of
the male. The pulvilli not enlarged.

Huh. Maryland. (Osten-Sacken.)

Oh.-<err(ih'i»i 1. — I believe that I am not mistaken with regard
to their belonging together, but I rather preferred to descrilte
them ticparately. If, contrary to e.\p(>etation, they should prove
as not belonging together, then the name must remain to the male,
which I consider as typical.

OhKcrriifion 2. — />. /c'/ro.sVo/»''.s a))proaches in its entire hal)itus
severjll species which 1 believe must l)e referred \{> (.'/iri/snliis uutvr
than any other species of the genus J)/(i/t/i<)riif<, known to me. The
elongation into a point of ihe third joint of the antenna' in tlie male
seems to indicate a reIatioiishi]» to Si/iiarflira.-< Imrhafus; neverthe-
less the latter ditl'ers materially by its n,,' row, not deepened face,
by the cons])icuously elongated third joint of the anteuuie and
also by the entirely apical insertion of the ari.sla.

I

^

i(;8

DIl'TKHA OF .NuKTII AMKKK'A.

[I'Airr !i.

B. The List segment of tliu fourth loiivjitmlinal vein interrupted.

1'. D. illterruptllH Lokw. %. — Oliscurt! viivsccns, iiiodici! iiiteiis,
feuiorihu.s et tibiis coiiuolorihus, geiiilniij testatuis, taisi.s fusci.s, vena
alarum loiigitudinali quartfi. interrupta.

Dark preen, moderately shining ; femora and tihife also preen ; knees
brownish-yellow ; tarsi brown; the fourth longitudinal vein interrupted.
— Long. corp. U.2I5. Long. al. 0.20.

SvN. Diaphtinix lule.rnijHun LoEW, Wien. Eut. Monatschr, V, 37, i). — Loew,
Xeue Beitr. VIII, 59, ti.

Male. Ratlior dark <i:i'(mmi, not, very sliiiiiiijr. Fiict; of uiiiforiii
Itroadtli .with the front, very l)roa(l for a iiiali', covorod with tliiik
whitisli dust, so that tiio ffroiiiid ('(»lnr Ijccoiucs iuvisihh', mo(h'r-
atcly dcopt'iied and witliout a transverse swellin;^. J*alpi and
|)rol)oscis l)hu'k. Anti'imio lihick ; their lirst joint somewhat hni.ii'er
than in other species; the third joint niunded; jtositioii of the
arista distinetly dorsal. Front with thick dusky-wiiitish pow(h'r,
so as to conceal the ffround color. Cilia of the uj)|)er orhit l)lack ;
the cilia of the lateral and inferior orbits an; whitish and form a
consiiieralde frinj^e. Upper side of the thorax and of the scntel-
him dark-frreen and dull from grayish dust. Ahdomen more
shining-green, with extensive but less thick whitish dust and on
the anterior ])art of the segments copjtery to a large extent. Tin,'
four stout bristles on the posterior end of the small and imix'dded
hypopygium are very prominent. Coxa^ l)iack ; the fore and
middle coxa? on the front side more bhiek-green and fringed with
1)lack bristles. Femora metallic green, stout, beset with dense
and coarse black hair, on the under side with numerous, but not
strong black bristles. Knees yellowish-brown. Tibia; on the
under and front side black-l)rown, on the upper and hind side
dark metallic-green, of strong structure and with unusually strong
bristles. Tarsi black-brown, the root of the anterior ones and
the under side of all the others more brownish-red ; all tarsi are
stouter and less elongated than in the other sjjccies known to me,
also with more hair; the jtulvilli arc all vei ■ much enlarged and
elongated. Teguhe yellowish with i)ale-yellowish cilia. Wings
hyaline, scarcely a little tinged with gray, alternately with yellow
and lirown veins; first longitudinal vein somewhat distant from
the margin of the wing and reaching about as far as the middle of
the wing; the third longitudinal vein is very close to the second

I.YRONElUrS.

ICO

and ends lonp before the tip of tlie wiiif?, althoiifjrli its end is very
iniieli eiirved huekwards ; tlie jjosterior transverse vein is very
short and lies much before the middle of the wing, so that the last
setrnient of the; fonrth h)nfritiidiind vein l)eeoHies nneoninionly Ioiilt ;
tlic latter diver^:es very niueh from the third loiifritudinal vein, is
entirely interrupted njton its second third and the last third, which
is remarkable by its slenderness, is i)ushed forward towards the
ihird loufritudinal vein.

Hah. Cuba. (Poey.)

Ohscrnition. — The interruption of tlie last sefrment of th(! fourth
loMiritudinal vein is ]»artienlarly strikinjr in this species ; a trace
of it is also found in some of the European sjiecies. The )>osition
and the course of the third longitudinal vein recall the ueuration
of Lijruneurus.

Gen. XXIX. I^YRO^fELRCS.

The followinp; are the characters of the freiius Li/rouriiruK :
The body is elongated. Eyes upon front and face widely sepa-
rated in l)oth sexes. Antenna; short; the first joint not liairy, the
second transverse, the third short, rounded, distinctly ])ubesceiit;
arista ajiical. Wings very large, at the tip l)road and very ob-
tuse ; the posterior transverse vein does not ap])roach the margin
of the wing ; the third longitudinal vein very close to the s'"ond
and very much turned backward at the end; the s])ace between
the third and fourth longitudimd veins reumrkably broad; last
segment of the fourth longitudinal vein distinctly in(lecte<l. Feet
rather long, but not very slender; first joint of the hind tarsi
without bristles. Pulvilli of the fore tarsi in the male not elon-
gated, llypopygium small, imbedded, at the posterior end with
four strong bristles ; its apj)en(lages are very small and hidden.

The genus LijroneurKx is liy far the next related to the genus
/)iaj)hori(ti. A more minute examination of the American spe-
cies of DiophoruH has satisfied me that this rehitioiiship is
greater than I supposed, when estal)lishing the genus Li/ro-
ih'io'us (Wien. Ent. Monatsch. I, o7). The larger size of the
wings, which are very broad at the tij*, the greater breadth of the
space between the third and fourth longitudinal veins, the distinct
flexure of the last segment of the fonrth longitudinal vein and the
not elongated pulvilli of the fore tarsi in the male, these are the

/•

. I

^■- 'I' 1

m

.!,;■

no

DII'TKIIA OF NDUTir AlMKKirA.

[I'AUT II.

i'liiiriiftcrs wliicli distiiif^iiisli Li/rij)ici(ruii rmin Jtiapfiont.^. Tlic
lust of tliese cliuraclt'i's is dccisivo for the inaiiitcnaiico of ihc
genus Li/nmcunix, as tlio oloiigalioii of the ))ulvilli of the fore
tarsi ill tiie male caimot he (lis)»eiise(l with in the character of tlic
jireiiiis /h'ap/ioriifi, without rendering the limit between Diuphorufi
imd r///-v,sf;/(/,s entirely uncertain. •

'i'lie genus Jji/roiirKnix, to which also belongs I>. ndiishit^
AVied., seems to contain only American species; they appear to
))e particularly numerous in South America.

The name of the genus (I'roiii xv|ia, the lyre, and itvpov, the
nerve) has refereiK'e to the lyre-shaped space between the third
and fourth longitudinal veins.

I.V ■

1. I... i'lCI'lllesceiiS Lokw. ■^ . — Viridis, thorace et alidotiiinis doiso
fii'i ulcis, IV'iiioruiii apice tibiisque totis testaceii^, tar.sis ex ni^jro fuscis.

(iiei'ii, tlior.'ix anil dorsuin of the abdomen sky-l)liiH : tip of tbe t'ciiiora and
tin; wliolc tibiie brownisli-yidlow ; tarsi blauk-biown. Long. corp. (K'l'J,.
Lon.L'. al. 0.125.

Sys. J.i/roiti itnis cirruhsreiis Loew, Wien. Kiit. Mon. I, 3i). — LoEW, Neiie
B.'itr. VIII, (JO, 1.

Light metallic-green, most of the upper side of the thorax, of
tlie scutelliim and the greater part of the upper side of the abdo-
men sky-blue or violet. Face of considerable and uniform Itreadili
and so thickly covered with gray-whitish dust that no trace of the
l)liie-green ground-color is left. J'alpi l)lack, with white-grny
dust and with strong black hairs. Antenniu black, short. Front
of uniform ))readth, equal to that of the face ; the dust upon it is
so thick that hardly a trace of the ground color is left. Cilia of
the u))per orbit black, cilia on the lateral and inferior orbits white
and forming a rather thick beard. Thorax ])ale green, upon the
middle line and ujion the whole hind ])art sky-l)lue, or shifting to
violet. The rather thick dust on the ujjper side of the thorax has
a gray-brownish tinge. Scutellum blue or violet with gray-brown
dnst, on each side with a stronger and with a weaker bristle, tm
the surfiice bare. JMeura; green with rather thick gray-white
tliist, Alidomcn cylindrical, metallic-green; its upper side
shining liliie or viidet from the middle of the second segment to
the lip. The jiiiir upon (he abdomen is lilack ; tiie bristles on the
lllliil lunv^hi uf tho single segments are but of moderutu length.

11.';

T II,

riiiiysoTUS.

in

1 III

iIm

Inn

the

'/V/,S

"htft

• to

the

iril

'I'lif lateral iimrfriii of the altdoiiicii shows a distinct ^[ray- whitish
(lust. The small h)'|»oiiygimii is coiiiplctcly iinhcddcd ; it lias (as
J now iKTccivt' on a wcll-pri'st'rvcd sju'cinicn) lour strong' hiistlts
on the hind niar^'in, like tlic liy|m|»y^inin of the nudes of />my//(o-
riis; the ajipendaj^es oC the hypoitvfi'inin an' e.Mri'niely small, and
completely hi<lden. Coxa- hiack, somewhat shiltin<i' to fireen, ren-
den'd ^niy Ity a coverinjj^ of dust ; the fore coxa' at the tip are of
a dnsky-yellowish color, and beset with hiack hristles, while on
their front side there; is some pale hair. Femora fireen, ind
slronj!; and frin/,''ed with comparatively short Itlack hair. On tlic
four anterior femora the tij> to' a consideralde extent, and <tn the
hind femora oidy the extreme tip are of a hmwiiish-yellow color.
Tiliia' bniwidsh-yellow, the tip of the hind tibia' sln»n<i'ly inl"ii>-
eated, all the til»ia' with but few bristles. Tarsi Ithnk-lirowii, the
first joint of the nnddle tarsi uji to its first third, that oi' tlie Inrc
tarsi up to the middle, yelhuv-bnjwni^h. Fon' tarsi but little
lonji'er than the fore tibia', and their lirsf jnint not (piile so hmi:"
as the rest; their piilvilli not eniarjicd. 'reiiuhe wliite-yellowish
with br<»wnish-l»laek cilia. W'in^s prayish liyaline wiili a u'reasy
lustre; veins brown ; the first loiijritudinal vein lies do>e to the
marf^in of the wiii<r and reaches (jiily a little over the lir>t (piarler
of the len^-th of the wiiifrs; the costa is rather stout, particularly
near the end of the second loiiffitudinal vein ; the jiosterior trans-
verse vein is straifrht and is ])retty much in the middle between
the root and the tip of the wing.
Ilah. Mexico.

•

Gen. XXX. C IIRTSOTl S.

The prenus Chi'i/sotiix ciMitains on the average only small spe-
cies. 'I'lie eyes of the males in many species meet upon the fmnt ;
in males of other s]tecies they are sejiarated. The front beconu s
iu'oader towards the vertex in most of these specit's, and more so
than is the case with the species of Dio/ihorus. Antenna' very
short; the lirst joint with()ut any hair ; the sei-oiid tran-verse ; the
third n)nnded, often rather kidney-shai)ed, sometimes pointed and
distinctly hairy ; only in <me species, which, on account of tlu!
afi'reement of all the other characters, 1 have located with Chnj-
rotiis, the third j<iint of the antennijo is considerably ionu'er. almost
of the same shape as in must of the species of Anjijra. The two-

'h

n2

DII'TKllA OP NORTH A.MKIUCA.

flAKT

■'i

m

jointed iirista has nii npicul or a siihapical jiositictn. lly|M(pv;;'niiii
iinlicdclcd, distinctly hairy ; its outer apiteiidafres liave a liinielli-
forni strncturo and are usually t'onet'aled. Feet rather short and
comparatively stron;r. The lirst joint of the liind tarsi witinMit,
bristles. Winers in eonijiarison ratluM' hroad and very rounded iit
the tip; tho small transverse vein in most of the speeies very tar
distant from the marjfiii of the win^r ; the last sefrment of the
fourth loiiffitudinul vein straij,dit, parallel or almost parallel to the
third lon<ritudinal vein.

1 have already e.xpressed myself in detail (see Diojihonix)
about the ditlieulty nttendinj^ the- distinction of the }!;eneru Uin-
phovHti and (Jhri/Ko/Ks. 1 have i)ointed out that I consider the
snndler size, the le.ss slender form, the comparatively sandier si/.('
(jf the \vinj;:s, the smaller leng'th (tf the feet, the not ehtn^ated pul-
villi of the fore tarsi in the nude and the absence of stroiij-cr liris-
tles on the posterior end of the hypopyfrium, as those characters,
which enaljle us to distinjyuish the speeies of Chnjuutus from
Dlaphorus.

The range of the genus Chrymtim is known to be Europe, Asia,
Africa, and America. The name of the genus (from ;t'pvtwT05,
gilded) has reference to the gold-green color of many species.

Mr. Say has described three North American species of Cliri/'
soliifi ; hardly one of the three probably belongs to this genus, as
Mr. Say seems to have misunderstood its characters ; C/iri/fioltDi
niihiltifi may be a MedcUirnx, (J. cunctnnart'iis is perhai)s a />/«-
phoriis, and (J. abdominalis is j)robably a (JJinjKotinnis. In the
ne.vt place Mr. ^Slaccpmrt has described a female as Chr[/Koliitt
ci rill if e morn ; if face and front are covered with white dust, as it
seems to follow from his descrii)tion, this character and the color
of the feet may perhaps help to recognize the species. Finally,
Mr. Walker has, in his usual careless nnmner, i)ul)lished a Chrij-
Kotus incertuH, which probably will remain incniiis forever; as he
has not even stated the sex of the specimen described, his descrip-
tion is of no use whatever.

I know, tlius far, twelve North American species of Chrysotus,
of which live are represented in both sexes, three only in the male,
and four in the female sex ; two of the latter offer but so little
l>eculiar characteristics, that I hesitate with their publication,
while the two others are striking enough to preclude the possi-
bility of a mistake.

CIIHYSOTUS.

Tnhh fur the tlrtenhiiinlii'K nf the ^^fifrifM.

it;]

I cornutut, nov.

{Tliird joint of the !iiiti'mi,-(' t'l(ini;,iti'(l.
Tliiril joint of tiu' untcnna- nut ('lungatL'd at all,
) I'Vniorii of iliirk cojnr.
t- Femora of i>alt) color.
I (iround-color of tin- palpi pale.
i Oround-color of tiie piilpi Itlackish.
( I'alpi whito.

( I'iilpi yiOlow, near tlif liuhin ' lackish.
^ Cilia of the tegiiliP black.
( Cilia of tlio tegulip pale.
( Kyes of tliH male separated.
I Kyes of the male contiijiioufl.

( l''our anterior tihi.i' of the male and all tlie tihifP of the female yel
I 4 obliquua

2 longimanuB
'.'• validuB

fi vIvlduB, nov

11

2

8

U

4

ft

/.ir.

I.ir.
()

8

sp.

7

Ow.

I.w.

Both the fore tihire of the male and th. four anterior tihiie of the

female yellow. f) afBnis l.u\

VVintfs of the male with thickened costa. !)

Wingrt of the male without a thirkenetl costa. 1(»

("ortta of the male vc ly mnch incrast>ated. 7 coBtalis /."•.

(^osta of the male moderately incrassated. 8 Bubcostatus, nov. sji.

Smaller species, with about three bristles on the upper side of the

liind tibice. i) discolor l.w.

Larger specie.s, with about live bristles on the upper side of the hind

tibiae. 10 auratua /.»•.

Aiitenn.-e entirely black. 11 pallipea /,'/'.

First joint of the anteunje red. 12 p'oticornia, nov, .sp.

'W

R'fK

Systeimitirdl nrrnnrjement of the Species.

I. Third joint of the antennie elongated.

1. cornutus, nov. sp.

II. Third joint of the antennaB not elongated at all.
A. Femora of a dark color.

A. Ground-color of the palpi pale.

2. longimanuB f.w. 3. validus Lw.

B. Ground-color of the palpi blackish.

1. Cilia of the tegulse black.

4. obliquua I tc. 6. vi vidua, nov. ap.

5. affinis Lw.

2. Cilia of the tegulw pale.

•h

IMAGE EVALUATION
TEST TARGET (MT-3)

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1.25

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lAO 12.0

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Hiotographic

Sciences

Corporation

23 WEST MAIN STREET

WEBSTER, N.Y. 14580

(716) 872-4503

mo

174

DIPTEllA OF NOKTFI AMKUICA.

[I'AKT II.

a. Costca of the male incrassated.
7. coBtalis Lw. H. Bubcostatus, uov. sp.

h. Costa of the male not incrassated.
!•. discolor Aw. 10. auratus Aw.

B. Femora of a pale color.
11. pallipes /.w.

12. pictioornis, nov. sp.

y^m

Pi* . ,

- I;,

Description of the Specicx,

I. Tmiin JOINT OF the antknn.^. elongated.

1. C. cornuf US, nov- "p. %. — Obscure viridia, paulo nitens, tertio
anteiinaruiu artit-ulu eloni^ato, ocnlis infra antennas contiiruis, tegulariiiii
oiliis fenioribus(jne nigris, tibiis testaceis, tarsia auterioribus imle ab
articuli prinii apice posticisque totis fuscis.

Dark cn'en, little shining; the last joint of the antenncne elongated, eves
meeting below the anteniife ; cilia of the tegulae and femora hlaik ;
tibiie brownish-yellow ; the four anterior tarsi from the tip of the fir^t
joint and all the hind tarsi brown. Long. corp. 0.09. Long. al. 0,09.

Dark frrcon, inodoratcly shining. Anloni.a; l)la(k, tlio third
joint uncommonly elongated for a Chri/mtus, almost of the sa!tie
shape as in the species of Arcjijva, only somewhat longer, with a
hlnnt tip ; arista a|)ical. Front hlack-green. Coxa* and fenutra
l)lack, the latter with brownish-yellow tip. TibiiP hrownish-ycl-
l(»w, the hindmost black-brown at the tip Jitid fringed on their
upper side with a moderate numl)er of bristles. The four anterior
tarsi are black-brown from the tij> of the first joint ; the hind tarsi
are of a black-brown color. Cilia of the tegula; black. Wings
ot the ustial structure i)eculiar to the genus ChnjsodDi, hyalint;
with a gray tinge ; the small transver.se vein is before the middle
of the wing and is short.

JInb. Illinois. (TjC Baron.)

Ob.-irrrafion. — This species is distinguished from all other sjie-
cies of the genus Chrifsofus in a striking manner by the unusual
elongation of the third joint of th" antennae, agrees, however, coin-
])letely in all other respects. I have hesitated to establish a new
genus upon it, as but a single character constitutes its difference
from Chrysotus, which character belongs proi)al)ly only to the
mult.

CHRYSOTl'S.

1(5

II, The third joint of the antknn.k not elongated at all.

A. Femora of a dark color.

A. Ground color of the palpi pale.

!!i. €.'. longinianiis Lokw. -J, .— Viridis, nitens, palpis albis, tnrsis
anterioribus tenuibus et loiigis.

Green, shining, palpi white, tlie four anterior tarsi long and slender. Long.

corp. (1.14. Long. ai. 0.14.
Sy.v. Chri/sotus lofijliiianiis LoEW, Neue Beitr. VIII, (!2, 1.

Sliiiiiufi^ <rretMi. Face of uiiifonii, and for a male, rather coiisi-
(Icralde bri-adth ; the covering of while du.st(h)es not entirely con-
ceal the {rreon-l)lue fj^round color. Palpi wliite, not very hroad,
but for a male rather long. The third joint of the antenna' not
large, rather kidney-shaped ; the position of the arista rather pre-
cisely apical. Front inetaliic-green, very little dusty and townrds
the verte.v very little enlarged. Upper side of the thorax covered
only with a thin brownish-yellow dust. Coxie and femora black
with a )>lue-green metallic lustre, which is more distinct on the
femora; Uie tij) of the fore coxie yellow, the tip of the posterior
coxa; dusky-brown. On tiie anterior feet the tip of the femora,
the tibiiu and the greatest part of the lirst joint of the tarsi are
yellow ; the remainder of the unusually slender and long fore tarsi
is dark brown ; the hind tibiie are yellow, but distinctly iiifuscatcd
at the tip ; the hind tarsi are dark brown. The hair ui)on tlio
feet is .short and the bristles very scarce. Cilia of the teguhe
l)ale. Wings distinctly tinged with gray and with rather black
veins. The posterior transverse vein is more distant from the
Y')i)t of the wing than in most of the other species.

Hah. Middle States.

.i.

3. C< TaliflllS LoEW. 9- — Anreo-viridis, nitens, palpis flavis, basim
versus nigricantibus, pedibus tlavis, fenioi'ibus i)()stiuis exi'epto apiue
nigris, viridi-mieantibus, feuioribus anticis nigro lituratis.

Qolden-green, sliining, palpi yellow, towards the basis blackish ; feet yel-
low, hind femora with the exception of the tip bliick, with cn'iTii.sh lus-
tre, the anterior femora strijjed with black. Long. corp. 0.1. J. Long.
aL 0.13.

SvN. Chrysotus »'«//(/«« LoEW, Neue Beitr. VIII, {j'i, 2.

Golden-green, shining. Face for a female of moderate Itreadtli ;

*;,';,

■ ; 'i

IS if

■flfi'i

176

DII'TKUA (»F NOIITU AMK.KICA.

[

I'AUT II.

its c'uvcriiig witli wliitisli dust dt»os not cntiri'ly conccul tlic bhic-
grccii jrroiui(l-<'t)l«jr ; tlio usual tniusverse swolliiig lies, as in ludst
of the otlicr sju'cies, usually nitlier far heluw its middle; pulpi Inr
a fcuuile of moderate size, yellowish and blaekish at the root. 'I'l:e
third joint of the auteiiiia> eomjtaratively not larj^e, rather rounded.
Front metnllie-fireen, with thin dnst and towards the vertex a lit-
tle enlarjred. I'pjter side of the thorax only wltii thin, lirownish-
yi'llow dust. Coxa; and hind fenntra Idaek with metallie-jrnen
lustre, which is most <listinetly seen on the latter. The tip of the
ftu'e eoxie yellow ; fore feet yellow ; femora on the upj)er side with
n black lonjritudinal siripe, the tarsi infuseated from the tij) of the
first joint ; nuddle feet entirely yellow ; the tarsi infuseated only
from the tij) of the I'rst joint ; on the hind feet the extreme tip of
the femora, the tibiae and the j^reatcr part of the first joint of the
tarsi are of a pale color. The hair upon the feet is short and
rather delicate, the bristles only few, thoiiffh the little bristles on
the hind til)iu! are rather loni?. The pale hairs on the eilia of
the teguUe seem to have, in some directions, a dark apjjearance.
Wiiifrs only sli<i^htly tin;i'ed with jrray, with dark l>rown veins.
The posterior transverse vein approaches but little the root of
the winjr, and is somewhat farther from it than in most of the

>ther

species.

JJab. Middle States. (Osten-Sacken.)

n. Ground color of the palpi blackish.
1. Cilia of the tegulse black.

4. C. obliqiHIS LoEW. % and $.— Viridia, nitena, tegnlarum ciliis
nigris, feiiioiilms nigris viiidi-mi<iantibus, summo anteriorum apice
flavo.

% . Oculis coutiguis, tertio anteuuarum articulo obliquo, tibiis anteriori-

bns flavis.
9 • Tibiis ouinibua flavis.

f?hining-green ; cilia of the tegulse black ; femora black, with green lustre ;

the extreme tip of the four anterior femora yellow.
^ . The eyes contiguous ; tlie third joint of the antennje obliijue ; the four

anterior tibia; ye' low.

5. All the tibiae yellow. Long. corp. 0.09—0.10. Long. al. 0.09—0.1(1.
yvN. Clirysotus obliijiins LoEW, Neue Keitr. VIII, ()3, 3.

Mnlc. Eyes eom])letely contisrnous upon the face; the snndl
triangular spot between them, immediately below the antenna;, is

■U :

r

CIIHYSOTLS.

r

citvorc'd witli Iji-o-vn-^rray dust ; the vitv small pal))! black. The
tiiinl joint df tin; aiit'iiiuu <'(iiii|»arativ('ly with huij^ hair, ratiicr
Inrii'f', <>l)li(jm', its upper margin iiiiich iiiDrc arclu'd than tho lower
iiiarjriii, wliieli is aliiiust straijiht ; the arista is siil)apic"al. Front

d I)

iiictallK'-jrrci'ii, without a <listiUL't trace of (Just, and Deconiinjir
liruadcr upwards. Tliora.v shining jirccn, sonictinu's rather gold-
ui'i-en. Coxie and fei'iora black with nietallic-j^rcen lustre; on the
I'liur anterior feet tin; exlreiuo tip of tho femora, the tibise and
the greater i)art of the lirst joint of the tarsi are yellow, the fol-
lowing part o.'' the tarsi l)lack-l)rowu ; tl\e liind til»iie and hind
tarsi are <lecidedly of a J)rown-I)lack color. The hair uiton the
feet, though sonu'what rough, is short, and even on the hind tihia'
of very moderate length ; the hind fenutra have on the under side
1)efore tho tip hut n few bristle-like hairs ; the bristles on the tibiic
are very scarce ; the pulvilli are very small even on tiie fore tarsi.
Cilia of the teguhe black, though some of them exhibit in a re-
lleetcd light a yellow -brownish glitter. "Wings somewhat tinged
with gray ; veins ))lack ; the posterior transverse vein very close
to the root of tho wing; the last segUient of the fourth longitu-
dinal vein parjillel to the third and ending a little before the tip

o! the wmg.

FcDKiIc. Face of moderate broadtli with grayish-white dust
upon rather black ground ; the usual transverse swelling is far
below its middle. Palpi blackish, the third joint of the antenn.e
snmller than that of nuiles, and its ob!i(pie form less striking.
The brownish-yellow dust on the upper side of the thorax some-
what more dense than in males. The color of the four anterior
feet like that of the males ; the hind tibiie yellow with a somewhat
dusky tip ; hind tarsi dark brown, the first joint is sometimes more
yellowish-brown near the basis. Wings like those of the nude,
only the anal angle somewhat nu)re protruding.

JItib. Xew York. (Osten-Saeken.)

Obiierration. — I liave no ground for doubting that these two
sexes belong together, as all those characters which distinguish
the nuile from the fenuile are within the ra:ige of the sexual dis-
tinctions peculiar to this genus, and the agreement of all the other
characters is very striking.

12

V

.' ■■-! .

'1-1

f

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178

DIPTEUA OF NORTH AMERICA.

[part 11.

5. C afllnis Lokw. 'J, and 9- — ViridiH, nitens, tegulamtn ciliia iiigris,
ftiinoribus nigris viridi-inicantibus, sutiiino anterioium apiee ex llavu
piceo.

^. Oculis contiguis, tertio anteiinarum articulo gubobIi(iuo, tibiis autiuis

ex llavo piceis.
9. Tibiis auterioribus ex llavo piceia.

Shilling green, cilia of the tegnl.T black ; femora black with green lustre ;

the extreme tip of the four anteri<»r femora yellow-brownish.
% . Eyes contiguous ; the third joint of the antennas but little oblique ; the

fore tibiffi yellow-brownish.
9. The four anterior tibia) yellow-brownisli. Long. corp. 0.09 — 0.1(i.

Long. al. 0.10.

Sys. Chrysotiis nffinis LoEW, Neue Beitr. VIII, 64, 4.

Male. It is so imu'li like tlie male of C. ohliquus, that a statc-
niont of tlie dillereiiccs will bo sufricient for its recognition. Tlic
third joint of the antenna? is visibly smaller and less oblicine ; the
hind femora have ujioii the second part of their under side a
greater number of bristle-like Idaek hairs ; finally the hair upon
the hind tibite is mnch longer; the feet are considerably darker;
fore tibi;« more yellowish-brown than yellow and towards their
tips distinctly dusky; middle tibiic often almost brown-black, but
always with a yelh»wish-brown basis; middle tarsi entirely blaek-
brown ; fore tarsi only near the basis of a pale brown color. I
have not discovered any other dilferences.

Female. I have only a single female, which I think belongs
here. It resembles the female of the preceding species very much,
only the fore tiliiie are more of a brownish-yellow color and dusky
towards the tip ; the middle tibite are still darker than the fore
tibiie and the hind tibiie are like those of the male, black. The
third joint of the antennie is somewhat smaller than in the females
of C obliqnuA.

Ilah. Middle States. (Osten-Sacken.)

6. C. vividus, nov. sp. %, — Viridis, nitens, ciliis tegularum nigris,
feinoribus nigris viridi-micantibus, genibus tibiisque flavis, maris oculis
distantibus et cost4 alarum non incrassatd.

Green, shining, cilia of the teguh-e black, femora black with green lustre,
knees and tibiaj yellow; in the male, the eyes separated and the costa
not thickened. Long. corp. 0.09. Long. al. 0.09.

Metallic-green, bright, but on the upper side of the thorax with
a rather thick browni.sh-yellow dust and therefore more dull. The

CIIKYSOTIS.

no

eyes nro soparnlcd l»j' tlic face, wliich is ('oniparativcly Itroatl for u
mule; tlie lact' lias a ratliiT distiiirlly illnt^t•^•s('(l iiiiddh' line, is of
ji inctallic-grc't'ii t'olur, l)Ut opacjuo dii acctount of llio cover of
whitish (lust. I'alpi black, tlicir whitish iniwdcr oidy bocoiiics
visible when seen in a very obiicjuo direction. Antenna- Mack, of
middle size, their tidrd j(»iiit is somewhat lounger than in most of
till' other species, hairy, and of a somewhat irreu-niar form, because
that part, where the arista is inserted, is soniewhai produced in
the shape of a lolje. Front metallic-green, dull on account of
l)rownish-yellow dust. Coxa' and femora black, the latter with a
frreen metallic lustre; the second joint of the fore coxtc, the tips
of all the femora, all the tibiu( and all the tarsi as far as the tip
of the first joint, yellow, the end of the feet brownish-black. Hairs
and l)ristles upon the feet very short, the liristles also very few in
number. I'ulvilli of the fore tarsi rather small. Cilia of th<^
tcfruhe black. Wings somewhat grayish, with a rather protruding
anal angle; the costa shows no thickeiung; the last segment of
the fourth longitndiiuil vein is scarcely a little inflected, jtarallel
with the third and ends inunediately before the extreme tijt of the
wing.

lldh. Illinois. (TiC IJaron.)

Ohiicrvalion. — It is not necessary, wlion identifying this species,
to pay too much attention to the shape of the third joint of the
anteiMue, as it sometimes changes its form, especially when recently
develojted s})ecimens dry up. The seiiarated eyes, the black cilia
of the tegula?, the color of the feet, and the costa without a thick-
ening, are characters which prevent its being confounded with any
other species known to nic.

2. Cilia of the tegiilre pale.
a. Costa of the male thickened.

T. C. costalis LoEW. % and 9- — Viridis, poUine confertissinio px
fusco liiii'ifo opacus, fenioribus nigris, genihus tihiisiiut; flavis, maris
ofulis distaiitilms et media costa? parte valde incras.sata.

Green, ojiaque on account of a very thick brownish-gray dust ; femora black ;
knees and tibinB yellow ; the eyes not contiguous in the male and tiie
middle of the costa thickened. Long. corp. ('.(it) — 0.10. Long. al. d.ni*.

Svx. Chrysotiis rostnlis Loinv, Neue Heitr. VIII, t)4, f).

Male. Ground-color metallic-green, or blue-green, but so
thickly covered with brown-gray dust a.s to conceal this color.

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180

DIPTKRA OF NORTH AMKIltCA.

[I'AKT n.

ruee broad for a iniilo, though a little luirrowor downwanl ; tlie
(lust is of aljout the sauio eoloi* as the rest of the hotly, usuallv,
liowever, souiewhat i>aler. I'alpi hiaek, of uiithlle size. The
tiiinl joint of the uiiteuuiu suuill, kiiluey-shapetl, with an eiitinlv
apieal arista. Front (juite opaijue on aeeount of its thick dust.
Ti»e nietidlie-green ground-color of the upper side of the tlidrux
l)econu>H iuore visil)le only when seen from behind. {Sculelliiui and
abdomen less thickly covered with dust than the thorax, so that
their metallic gnnuid-color becomes more apparent in most direc-
tions. The hair ujion the aljdomen apjiears, in a reflected light,
of a pale-browidsh color. Co.xa; and femora black, without a <lis-
tinct green lustre, the second j(»int of the fore coxie, the .extreme
tip of all femora, all the tibitu and all the tarsi as far as the tip of
the lirst joint, yellow ; the end of the tarsi dark brown. The hair
and bristles upon the feet very short everywhere, the bristles also
very scarce ; the pulvilli of the fore tarsi rather small. Cilia of
the teguke pale. Wings somewhat grayish, with a rather protrud-
ing anal angle and of more uniform breadth than in most of the
other species ; the fore margin of the wings shows a strong black
thickening, which commences abruptly at the end of the lirst lon-
gitudinal vein, becomes then gradually thinner and disappears
already before the end of the second longitudinal vein ; the last
segment of the fourth longitudinal vein is not inflected at ail,
]>arallel with the third and ends rather exactly in the extreme ti\»
of the wing ; the posterior transverse vein is almost at an ecpial
distance from the extreme root and from the tip of the wing.

Hab. Florida.

Female. It resembles the male very much, only the dust upon
tlie whole body is more thick and the green ground-color of the
abdonu'ii less bright. The face is not very broad for a female ;
its covering of thick dust has the same color as that on the rest
of the body ; although the usual transverse swelling lies somewhat
below the middle of the face, it is considerably higher than in the
females of all the other species known to me, so that the face is
divided by it into two almost equal parts. The wings have the
same shape of equal breadth as in the male, show however no trace
of a thickening on the fore margin.

Hab. Maryland. (Osten-Sackeu.)

\i

\ ix^

CIUIYSOTIS.

isl

i

M. I". silbcoslatllH, nov. sj). ^ . — Viridis, iH)lliiio raro ex fiisco <miu'-
ii'L ;is|M'i>iis, fciiioribus nii^ris, viricli-mifantilius, g(Miil>iH tiliiisiiiio
tlavis, iiiiiiis ociilid (listjintibuii et iiUMli4 {larte l'osI.i) iiiodiuu iiicrii.sisiitd.

(Jri'i'ii, sparstjly imivckmI with bniwuisli-gray dust ; Iciiiora })la(:k, with
gri'nii liistrt! ; kiicis and tii)ia' ycllnw ; the I'/fS in the male sf|iaralcd,
and the c^>^stu niodciattdy thickened. Long. corp. O.Oi). Long. al. O.dl*.

Mi'lallif-;^n'('ii t»r hluc-^Tci'n, iiintn tlie tlutnix willi in»l vt'i-y
tliick l»r<i\viiisli-<fi'iiy dust iiml lliciTlorn Irss sliinin;^'. Fair lor a
malt' ratlicr lirnnd, towards llio Ijottom soiuL'vvliat narrower, with
viTv tliick Itrowiiisli-jiTay dust. J'alpi near tin; root and niarjiin
blackisii, npon the middle more brownish ; it was not itossilile to
(listinfTuish their ctdor with certainly in the descrilied sjiecimens.
Third joint of the antenise very snnill ; arista apical; front (|nite
o]»a(iiie on account of a covering of brownish-jrray dust. The
seulellum and especially the alubiinen liave very little dust and
are shiidn<^. The hair upon the al)dt»men is black. Co.va- and
feiaora black, the hitler with a very l»ri<rht frreen metallic lustre;
the second joint of the fore coxa', the tip of all femora, the tiitiju
and all the tarsi as far as the end of the lirst j(»int, yellow ; the
tip of the tarsi dark brown. The hairs and liristles iJi»on the feet
everywhere very short, the bristles at the same tinu' very scarce.
I'ul villi of tiie fore tarsi rather snndl. Cilia of the tefruia- whitish.
Winjrs jrrayish with a rattier protruding anal anjile ; the anterior
nnirjrin of the wings shows a not very strong, but distinctly visible
thickening, which l)egins abruptly ut the einl of the first longitu-
dinal vein and thenco gradually <lecreases towards the tip !>f the
wing; the last segment of the fourth longitudinal vein is scarcely
a little inflected, parallel with tlie third, and ends a little before
the extreme tip of the wing; ))osterior transverse vein rather
etpiidistant from the root and the tip of the wing.

Hdb. Illinois. (Le Baron.)

Ohtiervation. — C. i^iihcostnfus is easily distinguislied from tJic
male of G. c(»i(alis by the smaller antenna', the less thickened
cos*a, the thinner cover of dust, and the green nu'tallic lustre of
the femora; from all other species it is distinguished by the
thickening of the costa.

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ItllTKIlA <»F NdUTM AMKIIHA.

/>. CoMtn of thn iiiiilu not t]iick<Mit!il.

[I'AIIT II.

!>. <". diHC'Oloi' I.oKw. % ami 9. — Viiiilis, uitfiis, fcniorilms ((iin olnri-
Ixis, i;tMiil)US, tibiiit vuiiiH4ii«! iiliiium thiviM, iiiuris oi.ulis tlistiuitiluis vi
nliiloiiiiiie viuliiuoo.

Shilling urtM-ii, also tin* femora; knet's, tibiii- ami veins of tlie winus v.l-
low; eyes of tlu) niiile Ht'i>iiraU'il and itrt alidonu-n violut. Long. t(iii>.
(t.Oi)-(t.l(t. Long. aL O.lO— (Ml.

Syn. Chri/siilu.i ilisiolor Lokw, Neno Ht'itr. VIII, (if), (i.

Mtilr. Sliiiiiiij^ jrrocii. The face rallicr broiid for ii iiialc. 11
lit! It' iiarntwcr tttwanls the Inttttnii, witli ycllow-ffrayisli or lailn r
wliito-jrrayisli dust upon grccii p,-n)Uii(l. i'alpi rallicr siiiall. Mack.
The third jitint of tlic aiitcmiii; not very hirjuc with an apical uri>la.
Front with rather tliick Itrownish-ycilow (hi>t upon {irccii jirnund.
The upper i<ido of the thorax and the .sculclhiin l'ri<ihl <rol(hii-
tjreeii, the posteritir end of tiie former and tlie hitter sonietinics
more hhie-green. The bro\viiisli-yeIh)\v (hisl 011 tin' upper side of
the tlujrax is distinct, hut not sullicient to conceal the ground-
color. The upper side of the al)domen is bright viidct, the lta>is
of th(! first segment and tlie lateral iimrgin stecl-ltliic or l)lue-grccii.
(,'oxa^ hlaek-grecn. Femora dark metallic-g-recn. The tip of all
the fenn»ra and the tibia) yellow; the four anterior tarsi bccnme
dusky from the basis so gradually that it is dillicult to state where
the infiiscation begins; on the hind tarsi the yellow coloring ex-
tends much farther, so that only the last joints exhibit a distinet
dusky tinge. The imlvilli are rather large, esjiecially on the fore
tarsi. The hairs and bristles upon the feet are everywhere very
short, on the tibiie and tarsi yellowish, with the exception of the
stronger bristles at tlie tip of the middle tiltiic. The cilia of llu;
tegruhe are pale. "Wings hyaline, scarcely a little tinged with
grray, with lutcous veins, which ))ecome a little nuiredark towaiils
the tip of the wing; the last segment of the fourth longitudinal
vein is parallel to the tiiird and ends exactly at the tij) of the
wing; the posterior transverse vein lies rather exactly in the mitl-
dle between tlio extreme root and the tip of the wing; the anal
angle of the wings is rather ])rotruding.

Fcmah'.. It dilfers from the male by the following nmrks : The
face broader, but not too nmch for a female ; the usual transverse
swelling is far below its middle. The third joint of the antennaj
somewhat smaller than that of the male. The abdomen goltlen-

V.'

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CIlUY.snTIS.

Is;{

The pulvilli of ali

friTcii, williont imy trine of u vinlit colnriiifr.
IIh' liirsi niM! very siiiall.

Jlah. Middle States. (Oslcii-Sackcii.)

lO. ('. aiirallls Lnmv. 9 • — Viridin, thorncit et noutellonurntiH, pollina
lutfsoMiti! suli(>]);u'is, ffiiioniiii iilt;i(>i'iiiii i\\wy'. tibilHijuu uuinibuit tluvis,
fat'iu liitiu.sculii alliiilo-iiolliiiosa, j)itliiis iiigris.

CirctMi, thninx niid scutulluni gildetl, Hiiiiifwliat dull on acruunt uf a liitfous
(lust; thu tip of tlif black t'ciiiuru uiid all tliu tibiiu ^ullow ; thu rather
broal faoo cuvurud with whito dust; paliii black. Long. corp. U.ll.
Long. id. (I. II.

Svs. Cliry-otiis niiriilns Lop.w, Neuo Ht-itr. VIII, (if), 7.

Mc'taHic-jfrci'ii. Face even fur a female ratlier broad, with
{rray-white dust ; the usual transverse swelliuf; lies very far lielow
its middle. I'aljii Idaek. The third Joint of the uidennte rather
largo for a feunile. with eomparatively lonj:; hair. Front pildeii-
ffreen, rather dull on aeeouut of a yellowish dust, (»nly a lilth;
Itroader upwards. The ujiperside of the thorax ffreenish-jridtlen,
lint thiekly covered with yellow dust and tliereiure opaijue. Cnlur
and dust of the sciitcllum the same as those of the tln»ra.\. Alido-
men of a purer mtdallic-j^reeii and with less dust, near the Itasis
Jisually more golden-green. Coxiu hlack, the extreme tip of the
first joint and the second joint of the fore eoxiu yellow, the second
joint of the hind coxio yellowish-hrown. Fcnnira black with in-
distinct green or bronze-colored metallic lustre; the tip of the
four anterior femora is to a larger, and that of the himl femora to
a snniller extent, yellovv. The tibiju and the tarsi have the same
c(dor, but the latter, towards their end, gradually l)ecome dusky.
The hair ujjon the feet is everywhere very short, and the bristles
very scarce. Cilia of the teguhe pale. Wings soimnvhat grayish
with brown veins , the posterior transverse vein lies about midway
between the extreme root and the tij) of the wing.

IJab. New York. (Osten-Sacken.)

B. Femora of a pale color.

11. r. pallipps LoKW. I and 9.— Viiidis, nitens, coxis auticis pe-

dil)UsqHe flavis.
Shining green, the fore coxJC and the feet yellow. Long. corp. 0.09—0.10.

Lonp. al. 0.10—0.11.
Byx. Chrynotua paUipcs LoEW, Neue Beitr. VIII, G6, 8.

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lill'TMt \ OK Niiinil AMKIMCA.

[I'AIIT II.

llfitli scvcs ri'>;riiililt' ciK'li ((IIht very iiiiirh. M('tiillic->fn'cii.
sliiiiiiijr. TIk' fyes uf llic nialc mccl aliunst (•(iiniilctcly, so that
tlir lai-c appfars sniall, liiifar ; in tlic It'iiiulc it is lu'oailcr ami has
tlic usual traiisvcrso swt'lliii};' far l»t'h>\v its niiddh'. 'riic dust upon
it is white in both sexes. Tlie palpi are rat her small and eovered
with whitish dust so as to t'oneeui tlie ffroiind-ecdor, whieh appears
to ite iiioi'i! Yellowish than hiaekish. The third joint of the an-
tenini' is not lai'fjre, (>veii in the males, and liut litth; ohliipu'. Front
green, rather dull IVoiu whitish dust. The upper side of the; thora.v
has a tlistinet whitish dust, whieh however does iKtt <'oiieeul the
;rroiind-c<dor. The lilaek liuir upon thu ulidomeii is Homewhut
huift'er than in most of the other species. The whol.' fore eo.\a',
the tip of the middle and hind coxa' and tlu! whole feet an! yel-
low, even the tarsi are only sli^^htly dusky towards the tip. Cilia
of the teji'uhe pale. Winjrs a little (grayish, with lirownish or
brown veins ; the posterior transverse vein lies considorubly nearer
to the root than to the tip of the winj?.

Jlab. Middle States. (Osteii-Saeken.)

i-^^h^^:,v

It. r. ItiriiieoriiiH. nov. sp. %. — Minutus, viridi-aeneus, modice
iiitfiis, ocalis int'r.'i iinteuiias coiitiguis, ])rimo autunuarum articulo rufo,
coxis iinticLs i>(;>iil)as(iU(i lliivi.s.

Small, bronze-green, nindeiately liright ; tlio eyes contiguous below the an-
teniijc ; lir.st joint of the iinteniiio red; foro coxie ami the feet yellow.
Long. corp. U.08. Long. al. 0.08.

Very small, bronzc-prccn, moderately shininp. The eyes con-
tifruous helow the nntennu'. Tin; antennie small, the first joint
red, the following two black, the third rather small and a little
oblicjue ; arista apical. Fore eoxa; and feet somewhat brownish-
yellow. The tij) of the hind femora on the upper side and all the
tarsi from the tip of the first joint, brown. The hind tibiju arc
fringed (»n the upper side only with a few delicate, not very con-
spicuous bristles, and show a dusky tinge at the tip. The color
of the cilia of the teguhe I cannot ](ositively state. Wings of the
usual structure, grayish-hyaline with brownish-black veins ; the
posterior transverse vein is rather short and lies before the middle
of the surface of the wings.

Jiab. Illinois. (Le Baron.)

Observation. — This description is made only after a single spe-

11

\.d-

TKtTIIol'ltiiUrS- SYMI'YCXrH.

Is-i

ciincii, iuhI will pniltalily r)M|iiii'r smiic curiTrliun ; tin- cnldr nf the
tii'st J'>iiit of tilt' iiiili'tiiiic is so fliiiniclci'isiir I'ur ilii>t >|ii'('ioH, that
tlu'iT is at) ])r*)l)al)ility of its luMii^i^ iiiistakrii l\>v aiiotluT.

Oen. XXXI. TF.I C IIOPIIOKl M.

The fjcims Titiihuithitrii!< rciiiaiiis liitlicrlo niii(iii»'<l to liiit a
few I'liinijiiMiii species. 'I'liey raliier resemlile tlie small species it'i
Chr If filth 1.1, iMit are easily (lisliiijruislieil rnmi tiieiii by llie rulluw-
iiijf cliaracters : Aiiteiina' smaller; arista tlistiie-lly dorsal. 'I'lif
ul)(|omeii of the male somewhat compresseil laterally, '{'he pos-
terior traiisversi^ vein, which is far distant from the mar^iin of the
winj;, has an e.vtremely steep position, so that its posterior end is
farther from the root of the wiiij; than its anterior end. The
feel of the nude are frinired with isolated, stronjr, slitf bristles, and
its hind tiliia> are cnrved and adorned in various manners. ISesides,
in all the hitherto known species, the costa of the male is thickened
in the same manner us that of the previously deserilx'd ('. ii).i/iilis.
The other churucters of the genus coincide with those of C/iri/-

SdluS.

The name of the penus (from ffixoi, armor, and ^t\'u, I hear)
has proliably reference to the peculiar orj^ans with which the
nude is provided.

Oen. XXXII. SYMPYCXl'S.

Charnrfvrs. Small, In;* little shii\infr species, of a rather slender
shape. The face is not narrower upwards. Antenna' rather
small, in the fennde shorter than in the male ; the first joint with-
out hairs; the arista is inserted upon the edjre of the third joint
in the vicinity of its basis. The metathora.v is not unusually pro-
trudiiiLC nor (doii,L'ate(l. The altdonien of the nuile is more or less
compressed laterally. The hypopy^ium is snnill, more or less im-
bedded ; its outer ap}»en(la<res small, sometimes not distinctly visi-
ble. The fourth longitudinal vein, towards its e!id, is perceptibly,
althoujrh oidy slijrhtly, appnt.ximated to the third and very little
oonverfrent towards it ; it ends somewhat before or into the tip of
the wing; the ])osterior transverse vein before or upon the middle
of the winjr, distant from its margin ; the si.xth longitudimd vein
becomes indistinct long before it reaches the margin of the wing.

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IHPTKRA OF NORTH AMKIlIfA.

[I'AItT IT.

The feet are sparely friiijjod with l)ristl('s ; the hind tarsi shorter
than tlie liind til)ia> and tiieir lirst joint without 1)ristles.

Tlie jrenns Si/nij)i/riins stands in the (dosest proximity to Anc})-
siux, is, however, very easily distin,i,Miishe(l from it ))y the ffhibrons-
iiess of tJK! lirst joint of the; anteinue. Amoii}; the {i'enera whieh
liavc no iiair upon tlie lirst joint of the antennae, Xdiilliixlihinitt,
'TcuclitijiJiiirus and (Jdiiijisiciiciniis are the next to it; they dilVer
from Si/iiij)>/cn IIS ])y ilm following elniracters : 1. XdntJioclilnrus
liy the depression on the ](osterior end of the thorax and the pre-
vailing' yellow color of tlie body and of the bristles upon the
thorax; '?. TciivJiDiiliorKH liy the steeper positit)n of the posterior
transverse vein, the thiekenin<^ of the eosta in the male, the isolated
and strikinji'ly strong bristles ui)oii the feet and the entirely hidden
liypopyjj:iuiii ; .'J. CantiixicuoiiKu by the elon<rate(l metathorax, liy
the last sej-ineiit of the fourth lonf^itudinal vein, which is i)arallel
to the third ami ends always biyoiid the lip of the wiiiiis and
by the face of the male, whieh is very narrowed u])war(ls, t^e.

The name of the genus (from ovitnvxvo^, crowded together) has
reference to the crowding together of the ends of the fourth and
the third longitudinal veins, whereby Si/dijii/ouis is distinguished
from ('((mjisirncniua and many other related genera.

I am only accpiainted with species from Europe, Africa and
North America; the majt)rity of tlie North American species
difl'er from the European and from the South African species by
tlu! fourth longitudinal vein ending exactly into the tip of the
wing, while in the other species, this end is distinctly before the
tip. As they agree in all other details of organization, there is
no ground for a generic separation, but it would be advisable to
form of <hem a group within the genus Si/mpi/nius. The charac-
ter of <!ie genus Si/nipijcnuii, as hitherto established, requires, with
regard to these species, a slight modification, wliicli 1 have already
introduced.

Table for the determination of the S/xcics.
Fourth longitudinal vein ending before the tip of tli(! wine;

f i'ounn
' Fourtli

1 tertianuB, nov. sp.

'ourtli longitudinal vein ending into the tip itself.
AnteniiiB entirely black.

!P pale near tbe basis.
Tlinrax with dark loimitudiiial lines

( Antenn
' ( .\iitenn

3i

t Thorax without dark longitudinal lines.

2 frontalis f.w.

.*? lineatus /.«'.
4 nodatua Lw.

I'M ,,

^'L

SYMPYCNUS.

Sy>>tematic(il urrnnijemvnt of the Species.
I. The fourth longitudinal vein ending before the tip of the wing.

1. tertianus, n. sp.

II, The fourth longitudinal vein ending into the tip itself.

2. frontalis f.w.

18T

4. nodatUB Lw.

b. lineatus Liv.

Dcscrljilion of the Sjiecie.-i,

I. The fourth lonuitldinal vkin knuinu befoue the tip of

THE AVINU.

1. S. tl'I'tiailUS, iiov. sp. % and 9- — ^''^ cinereo viresceus, suh-
opacus, thorace non liiicato, duolnis i)riuiis antennaruni artiuuiis, jial-
pirf, ventre, coxis iiedilju.sque dilutissiuie ilaviuantibus, tarsis inde ab
artieuli prinii apice nigri(;antibus.

1 . Articulo tarsorum postiuoruni tertio abbreviato et prope apicem pilis
paulo longioribus liirto.

9. I'edibus siniplieibus.

Gray-greenish, ratlier dull ; thorax without dark lines ; the first two joints
of the antennie, palpi, venter, coxic and feet pale-yellowish ; the tarsi
from the tip of tht; first joint blackish.

^ . The third joint of the hind tarsi shortened and rough on account of
some longer hairs near the tip.

9. Feet pliiin. Long. corp. 0.10. Long. al. 0.1(».

Dark frniyish-f^rccH, 1 ithor dull. The front seems to I)e of tlie
same color. Face fjrayish. J'alpi and the lirst two joints of the
antenna' wliite-yellowisli ; tlie third joint blackish, in Iiotli sexes
rather rounded. Arista in both sexes plain. A'enter whitish-yel-
low as far as its tip. The liyp<>py<i:ium, as in the other species of
this f^(.iius, rounded and semi-ind>edded ; its lancet-shaped e.vterior
lamelho small, but distinctly percejitiljle and of rather dark color.
The posterior maru'in of the j)leuric and the coxa' wliite-\ell(»wish ;
the four posterior coxa; near the Iiasis more or less i'lfuscated.
Feet wlnte-yellowish, with Idack, somewhat scattered hairs, on the
middle and the hind til)ia> with a few black bristles. The tarsi
from the tip of the first joint very much infuscate(|, the hind tarsi
from the same spot almost entirely black. 'I'he joints of the fore
tarsi of decreasin<r leiifrth in the fennile, while in the male the
third and fourth joints are of about the same lenfrth. The joints
of the middle tarsi are of dccreasiri<>; Icnj^'th in both sexes. The
first joint of the hind tarsi is, in both sexes, a little shorter than

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188

PTPTERA OP NORTH AMERICA.

[part ir.

tlie second; tlio rullowiiig joints niv, in the female, of deereiisinj^
lenji'tli ; in the mule the third joint is sumewhat shorter than the
fourth, and at its end, on the posterior side, l)eset with lonjrer
blaek hairs. Wings towards the basis very much narrowed ; the
posterior transverse vein is before the middle of the disk of the
wing, Ijut rather exactly in the middle between the extreme root
and the tip of the wing; the fourth longitudinal vein ends some-
what before the extreme tip of the w;Mg; in the female, however,
at a very small distance from it.
JIab. Sitka. (8alilberg.)

II. The fouutii lonuitudixal vein ending into the tip of

THE AVINO.

S* S. frontalis Loew. % and 5*. — ^'ig^icalls, fronte lajte violaceo
splendente, auteiinis totis nigris.

Blackish ; the front bright violet ; the antenna! entirely black. Long.
Corp. 0.11. Long. al. 0.12— U.13.

Syn. Sijmpi/cnuH frontalis Loew, Neue Beitr. VIII, G7, 1.

Face in the fcnuile of moderate breadth, in the male below very
narrow, towards the antenna? broader, with white dust, so that
the blue ground-color becomes very little visible. Antenme
black, larger than in the next following species ; the first joint
rather long ; the third joint only with a very short pubescence,
larger and ovate in the male, smaller and rather rounded in the
female. Front bright steel-blue or violet. Cilia of the inferior
orbit whitish. Upper side of the thorax dull on account of a thick
gray-brownish dust, nevertheless the green or blue ground-color
is distinctly visible through the dust. The scutellum is of the
same color as the upper side of the thorax, and has no hairs
besides the usual bristles. Abdomer b'ack or greenish-black,
the second segment usually with a comi)lete or almost comi)lete
yellowish transparent transverse band, the third segment with
one, which is interrupted in the middle ; moreover the first and
fourth segments arc usually yellowish-transparent on the lateral
margin. The venter is always white-yellowish. The hypopygium,
of the s iue color as the abdomen, is somewhat larger than in the
other species of this genus known to me, and but very little im-
bedded ; its outer appendages are so small and hidden that I can-
not distinctly porceive their shape. The posterior margin of the

IJiL

SYMPVCNUS.

189

plcuroj, all the coxre and the feet yolluwisli. Fore coxik only with
j»ale hairs. The foiiiura Iiavo, besides the usual small bristles im-
mediately before the tip, no other bristles. The fore tibiie are
without bristles, the middle and hind tibia; with but few In-istles.
The fore tarsi are more or less infuscated towards their tip ; in
the female the joints are of decreasing length, the first nearly as
long as the three following together ; in tiie male, on the contrary,
the first joint is extremely shortened and not (piite as long as the
last one, the second almost as long as the two following together,
the third considerably slujrter than the fourth joint, which latter
is fringed on its upper side with little curved hairs. The joints
of the middle tarsi, which towards their end become more and
more dusky, are of decreasing length in the fenmle ; in the male
their first joint is considerably longer than the following four
joints together, the second as long as the following three together,
the third and fourth of almost e(|ual length, but very short, on the
anterior side bearded with delicate little fringe-like hairs; the
fifth joint is somewhat more slender than the two preceding joints
and almost as long as these taken together. The hind tarsi, from
the tip of the first joint, are more or less infuscated, the first joint
much shorter than the second, and the following joints of decreas-
ing length in both sexes. The teguhe with pale-yellowish cilia.
Wings rather long and narrow, but moderately pointed towards
the root, in the fenmle less tinged with gray than in the male ; the
fourth longitudiiml vein is parallel with ii."e third and ends rather
exactly into the tip of the wing; the posterior transverse vein is
perpendicular and lies before the middle of the wing.
Hah. Pennsylvania. (Osten-Sacken.)

3. S. lineatlis Loew. % and 9 ■ — Cinerens, fronte nigrd, antennarnm
basi, sciitt'Ui margine, ventre pedibusque Uavis.

Gray, front black ; the root of the antenna*, the marpin of the scutellnm,
the venter and the feet yellow. Long. corp. 0.10 — 0.11. Long. al.
0.11—0.12.

Syn. Sym/iyrniis Uneatua Loew, Neue Boitr. VIII, 67, 2.

Brownish-cinereous, opacpie. Face c '••■• -i with whitish dust
upon black ground ; in the female it is rather narrow, in the male
so much narrowed that the eyes are contiguous on the lower part
of the face. Palpi rather blackish. AntenniB rather short, the

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DIl'TKUA (IF NCtUTir A^IKUICA.

[I'AliT ]I.

third joint smaller than in the next proced •;■.;: specios, in tho \\\\
chmtr'atcd-ovatc, in llio female eonsiderahlv shorter, in both sex

xes

with a hasal arista; the lirst joint is always of a yellowish eolur,
the two followinir ])aler or darker brown, sometimes rather black-
ish. Front blaek. Cilia of the inferior orbit pale. Upper side
of the thorax brownish-cinereous, entirely uj)a(iue ; the humeral
eorner usually brownish-yellow ; on its upper side there are several
dark Ioii<ritudinal lines, the more distinct of which are usually a
delicate middle line and two stroiij^er lines alontrside of it ; the

latter bear the middle rows of bristle

Tl

lese lines

disa

ppcar,

however, when looked upon from another direction, and are not
eipially distinct aid sharply dclined in all specimens. Scutellum
on the middle of the ujiper side g-ray with a metallie-blue lustre,

the nmririn velhtw. JMeune irrav, their inferior

portion more

u'llow. The metathorax bliickisli-,ti*ray. Abdomen in well
colored specimens brownish-a-ray, in less matured ones more yel-
lowish-lirown ; the whole venter always pale-yellowish. The small
hypopyuium is mostly shiidn<r lilack and rather ind)edde(l; the
outer appendaii'cs are lartrer than usual in the species of this jrenus
and have alm(»st the form of small liliform lamellae; their color is
a diniry ycllowisli-l»rown. Coxie asid feet yellowish. Femora
<udy with tho usiial bristles immediately before the tij). Fore
tibia' without bristles. Middle and hind tibise with a moderate
iiund»er of short bhick bristles. The first joint of the fore tarsi
about as lontr; as the three; followiufr, which are of decrea insr
length, most of the fourth and the whole fifth joint black-brown,
^liddle tarsi from the tip of the first joint more or less dusky;
their first joint al)out as lontr as the four followinir to^-ether, which
are of decreasiiiir IcuLi-th. The lirst joint of the hind tarsi much
shorter than the second, the followinir of decreasing leng'th.
Tejruhu with brown margin and with ))ale-yelli)wish cilia. AVintrs
tinged with gray, in the nmie with a cuneiform tapering towards
the basis; this is not the case in the females; the fourth longitu-
dinal vein is parallel with the third and ends rather exactly into
the tip of the wing; the posterior transverse vein is perpendicular
and lies rather ui)on the middle of the wing in the female, consi-
derably beyond it in the male.

Ilab. Virginia; New York. (Osten-Sacken.)

\}l:

SYMPYCM'S.

Ill

4. S. nodatlis LoF.w. % ami 9* — fincn-us, ni.artriiit' jiriini nntcnna-
mm .irtictuli infero, fascia, .■vlnlojiiinis baxali iiiafiilit^i|iiH lat«'raliliiis. ven-
tre et pedibus llavi('antil)us, fenioriiiu posticoruin apice nigrt', (*t.'tik aii-
teiiiiali maris capituluiu miiiutuiu apicalu gfieiite.

Gray, the lowt^r margin of the first joint of the aiitcniKT, a hand near the
basis of the abilonien, hiteral. spots ujion it, venttM' ami feet, yellowish ;
the tip of the liind femora blackened ; the arista of the male at tlie tip
with a small button. Long. corp. (Md— n.ll. Long. al. d.ll— (i.l2.

Syn. Syiii]»/ciius iiodatits LoEw, Berl. Ent. Zeitsch. VI, -1'), G>.

Face of tlu! iiialo vitv nnrrow, upwards a little broader, with
white (lust ; tiie faee of the feuiale much l)roa<h'r, i..»t i»ereej>tili!y
narrowed Itelow, jiiul much less thickly (histed, so that the i'lack
frround-e(dor is distinctly apparent. Antenuic of a stouter struc-
ture, and even a little larjrer than in S. /'roiitalis ; the first joint
rather lon<r, u)»oii «''<. under side always of a yellowish color, souie-
tinies yellow, with the only exception of its upper edtre, in which
case the yellow coloring extends also on the lower cdjr(,' of the
second joint; the third joint in the male is broad ovate, in the
female rounded. Arista Iiasal, in the fennde somewhat shorter
and plain, in the male lon<fcr and eidarji'cd at the lip into a small
button. The front is fi'ray, but appears in some directions almost
black. l'])])er side of the thorax brownish-jrray, opaipie. without
distinct lonu-itudinal lines, with black l)ristles. Scutelhim usually
darker than the upper side of the th(»rax and without luiirs, excejit
the usual bristles. Pleura; whitish shite-u'ray, their posterior
mar<rin yellowish. Abdomen of a brtuize-black, moderately
bright culoring, sometimes with a green or bbie metallic lustre;
ui)on the second segment there is a very broad, usually inter-
rupted, transverse band; ui)on the third segm<'iit there is also a
transverse band, usually interrupted in the middle, and consisting
of two yellow lateral spots; the fourth segment has usually a yel-
low spot on each side. The hypopygium, being of the same color
as the abdomen, is of a similar structure as in ,S. J'r<)nlah'!< ; its
snnill, not easily jten.'eptible, appendages are black. Coxa' and
feet yellowish. The fore coxa' are covered only with whitish hair,
nevertheless the stronger hairs on the tip assume sometimes a
blackish appearance. The femora without any other l)ristles but
those small ones, usually found before the tip ; the hind femora are
of a brownish-black color to a rather large extentj though their
extreme tip i.s again paler. The fore tibiie have only a single

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192

rtll'TKIlA (IF NdKTII AMKIUCA.

[I'AHT H.

gniall bristle, ^vlli(•ll is on tlicir upjicr side, not far from tlie root ;
tlic iniddli! tibiii; have; only a few bristles ; llio liind tibiiu have a
larprer nniuber of l>ristles, but they arc mostly very sht;rt ; in the
male there is oik; bristle on the nnder side, not far from the l)asis,
\vhieh is rennirkaltle for its lenj^th. Tiie fore tarsi have l';the
lenji'th of the tibia'; in the nnile the lirst joint is very iiineh
shortened and not as lon<!j as the list one, the seeond is as lonjr as
the three followinjr toti-ether, and usually a little l)laekened on the
cxtretiie tij), the three last ones are l)laek and very little decreasinfr
in leiiji'th ; the last one with somewhat shorter hairs than the two
jjreecdinu- ; in the fenuile the fore tarsi are frradually of a darker
blaek-brownish eolor towards the tij), and their j<jints are (jf a de-
creasinsr leiiuMh, the first somewhat lonj^er than th • two followin^^
))ut not (|uite so long as the threj f<jllowing' tofrether. The mid-
dle tarsi of the nnile but little exeeed the tibiiu in lenjrtli ; their
lirst joint is of a plain structure, but almost 1 i the length of the
other joints and blaekened at its til) ; th.' last four joints arc l)laek ;
the seeond is as long as the last three together, gradually enlarge<l
towards its end, and at the end o:i the outside, in consecpienee of
the greater length of the appressed black ind)eseenee, elongated
into a kind of j)rojection ; the third and fourth joints hav» on the
))osteiior side a few erect crooked hairs. The middle tarsi of the
female are jdain, scarcely shorter than those of the male, towards
the tip gradually of a darker black-brown color ; their joints are of
a decreasing length, the first is longer than the following two, but
shorter than the following three together. 'I'he hind tarsi are of
the same structure in Ijoth sexes, shorter than the tibi* ; their last
four joints black ; the first joint is scarcely longer than the third,
tl>e second at least as long as the third and fourth together, llal-
teres yellowish. Teguhe with a narrow black margin ; their cilia
appear yellowish in a reflected light, seen towards the light, however,
blackish, in the female even often Idack. Wings grayish hyaline,
in the male with the posterior margin somewhat wavy, and towards
the basis much more pointed than in the female ; the fourth longi-
tudinal vein is parallel to the third and ends precisely at the tip
of the wing ; the posterior transverse vein is perpendicular and
lies upon the middle of the wing.
JIab. Illinois. (Le Barou.)

liii'-,-/

CAMP.sic :r,:.iu8.

m

Gen. XXXIII. CAIVIPSICWCMrS.

Chai-arters. The first joint of the antennae without hairs on tlic
upper side ; the third more or less pointed, distinetly hairy ; the
arista inserted on its l)aek, near the basis. Faee npwaros very
narrow, especially in the male. The metatliorax is flonjrated ;
tlie abdomen flattened. Tlie snmll hypopyginm inibi'ddod ; its
appenilaj^es extremely small. Feet slender; the first joint of the
hind tarsi witlutut bristles. The males are usually remarkai)le by
the peculiar structure of their tibiie and often also of the tarsi.
The last se<rment of the fourth long-itudinal vein, al)out its first
qimrter, runs over a distinct convexity of the win<r, is parallel to
the third longitudiiml vein and ends beyond the tip of the winfr.

The jrenus Ca))tp.sici)('))u(.< possesses so many remarkal)le cha-
racters that the species belonging to it cannot either be mistaken
or confounded with s))ecies of another genus. The name <if the
genus (from xd^^tj, the curve, and xir^utj, the til)ia) was given be-
cause the males of many species are distinguished by the peculiar
curvature of their middle tibia).

The sjjeeies hitherto known belong to Europe and Xorth Ame-
rica.

Di'fcrijition of the SjiecieK,

1. C llirtiipes Loew, % and 9- — 01)scure olivaccus, facie ochracefl,
alls infuscatis, coxis anticis ptuUbusque ex testaceo lufis, tarsis praeter
basiiii ex fiisco nigiis.

% . Prinio tibiaruni intermediarum d.imidio incrassato, tarsis(iue anticis
setas longiores gerentibus.

9. PedibiLs siinplieibus.

Dark olive-brown, face o(dire-colored ; winas Mackisli-pray ; fore cox.t and
feet brownisli-red ; tarsi lilaek-brown with tlie exception of the root.

% . The thickened basal half of the middle tibice and the fore tarsi beset
with lont; bristles.

9- Feet plain. Long. corp. O.dS. Long. al. 0.13.

SvN. Citiiijisicnemus hirlijies LoEW, Neue Bcitr. VIII, 68, 1.

Metallic olive-brown. Face very narrow, yellowish-l)rown,

with a l)right golden-green spot immediately under Ihe antenuic,

which is not always easily discernible. A'.itenuic entirely black ;

their third joint in the male long and pointed, in the female short

13

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104

DirTEIl.V OF NullTII AMKHICA.

[iWUT II.

and Rmall. Front liluck with a violet, ofton very hrij^ht luslrc,
ininiL'diati'Iy above the anteiiiue wllli a pale eop|»er-re(Ulish spot.
The fiiia on the inferior orbit pale. Tlie upper side of the thora.K
often sliowrf violet relieetions. The scntelluni shining violet,
rarely shining blaek with an indislinet violet lustre. The eohir
of the nlulonien is usually more greeiiish-blaek. P'ore coxa; brown-
ish-yellow, near the basis blackened ; middle and hind coxuj black
witli l)rownish-yellow tip. Feet yell(»wis!i-red or brownish-red.
The extreme tip of the knees blackish-brown and the tarsi from
the tij) of the first joint black. Sometimes the upper side of the
femora is distinctly infuscated. Cilia of the teguhc l)lack. Wings
tinged with blackish-gray and with l)lack veins; the convexity of
the wings lies before the first quarter of the last segment of the
fourth longitudinal vein.

Male. Its fore femora arc thickened as far as tlioir middle, iind
<m the under side, precisely at the end of this thickening, they me
densely bearded with stiff little bristles ; the fore til)itP are visibly
stouter than in the female, beset on the under side with numerous
and erect, on tlie upper side with less numerous and less erec t
bristles; fore tarsi with unusually long hairs, especially on their
first two joints. The structure of the middle femora is similar to
that of the fore femora, though their thickening is less strong and
reaches as far as the tip ; the thick beard on the under side, formed
of short stiflF bristles, is thus brought nearer to their end. Tiie
middle tibiae are of rather irregular structure ; from the basis to
about their middle they are distinctly thickened and fringed on the
upper side with a few long black bristles, on the under side they
are ])r(»vided with a small tubercle, beset with short bristles. That
part of the middle tibia), which is not thickened, is of a plain stnie-
ture, thougli beset on tlie under side with a row of rather long,
black, bristle-like hairs. The middle tarsi and the whole hind
feet are of a plain structure.

Hab. Pennsylvania. (Osten-Sacken.)

S. C Claildicans, nov, sp. % and 9. — OHvaceus, facie ochrafea,
alis infuscatis, punctuni nigrum in ultimo venje (juartm pegmento geren-
tibus, coxis anticis ex tfst'iceo fuacis, pndiltus ex rufo testaceis.

%. Tibiis intermediis cra.ssissimis, varia, supra nigro-spiiinlosia, tarsis in-
termediis totis nigris, articulo primo rra.«so, recurvo, .supra nigro-setoso,
tarsis anticis po.sticia(iue simplicibua, inde ab articuli primi apice nigris.

9 . Pedibus simplicibua, tarsis omnilms inde ab articuli primi apice nigri».

\ d.

CAMrsirNF.Mrs.

1115

Olire-ijrcHii ; <lt(> face oclirc-^cllow ; wiiiiis iiifiiscafcd. with n Mack sjiot
tipiiii tlie liiHt Hfgiiieiit of tli» fuurtli l()iii;itii)liii:il win ; (nm cuxw ic<l-
(lish-lirown ; fwt hrowiiish-rt'd.

^. Middle tiliiiu very .stout, crcxiked, cm the upper side with -innll Mai k
spines; the middle tiir.si entirely black; their (Irst joint thickciuMl,
curved upwards, on the upper hide with black bristles ; fore ami bind
tarsi plain, from the tip of the first joint black.

9. All the feet plain; all the tarsi from the tip of the first joint, black.
Long. corp. 0.09. Long. al. 0.14.

Olive-groon ; tliorax iiiDro bripn tlian tlio nhdnnicn, near its
fore margin witli a few strikingly groon rcllcctions. Front lilnck-
isli-!)lue. Anteniiic etitirol}' liiack ; the third joint small and not
pointed. Face brownish ochre-yollow. Palpi ot'liro-lirowiiisli.
I'roboscis black. Cilia t»f the posterior orbit l»la<'k hIiovc. below
pale. Fore coxte brownish-red, sometimes yellowish-red, with a
white rellection near the root and a large part of the outside
brown; the four posterior coxae grayish-black, the trochanters
brownish-black. Feet yellowish-red ; the knees, esjx'cinlly thosi;
of the hind feet, more or less infiiscated ; all the femora, the fore
and hind tibia;, as also the fore and hind tarsi are i)lain in botli
sexes, the latter blackened from the tip of the first joint. TIk;
middle tibiaj and middle tarsi are only in the female of the stime
plain structure and of the same color, while they are distinguished
in the male by a very different structure ; for its middle tibise are
uncommonly stout and somewhat curved; the greatest thickness is
in their middle ; the last two thirds of the posterior side are excised
and provided with a brown stripe ; before this excision, iilmost on
the upper side of the tibia, there is a longitudinal row of black spine-
like bristles, wliich does not occupy, however, the basal third and
the apical one-fourth of the tibia; the second half of the tibia
bears upon the other two si<les a few long black bristles ; the
middle tarsi of the male are entirely black ; their lirst joint is
somewhat curved upwards at the tip, stout and near the extreme
basis a little more swollen, on the upper side excised fnrrow-like
and fringed with a row of black bristles ; the following joints ar«;
plain, the second not quite so long as the third, -nd at the extreme
basis sometimes of a yellowish-brown «olor. Wings with a dis-
tinct smoky black tinge and with a small blackish spot upon the
last segment of the fourth longitudinal vein.

Hab. Sitka. (Sahlberg.)

■ t

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I9t;

IHrTKIlA OV NORTH AMKIUCA.

Gen. XXXIV. l*I.AlilOXi:ritl'N.

[I'ART H

This j^onns lins Ir'cii I'sttiljlislicil Jty iiic (in tlic Wicii. Kiifnm.
Moiiatsclir. I, 4.']) on the spofies (U'scrilu'd liolow, uiul known ;i>i
yt't (»nly in (he rcinule sox, l)Ut the extnionlinarv mi'l |K'<'ul!:ir tlui-
rncters of wiiich rendered the cstal)lishnient <-t' u new genus neees-
sury. The whole hiihitns nj)i>roaehes tlie species of G'/innojifi-r-
vijn and I'cliniloiu'Krtai most, dilVers, however, fnnii both liy tl'e
lirst joint of the antenme heinj? entiivly without iiairs and liy tiie
posterior transverse vein havinj; ^n iinusnally ol»li(pie position ;
from (ri/iini(>j)ffrin(n it dill'ers ni treover l»y tiie course of the la>t
sojfinent of tiie fourth lon<ritU(l'nal vein, wliich is almost iii<e tliat
of the genus PehiMi>tH'iir>i,'\ The peculiarities (if the fcnnile
seem to indicate that the ii' popygium of the male is disenjrnjicd.

The estalilisliment of th • characters of this geims on so scanty
materials ])resents nniny (illiculties. I believe, however, that the
followiuff nmy l»e regarded at least ns a temporary delinitimi.
Tiie first joint of the antciiiuv without hairs, the second not reach-
ing tliuml)-like over thij third, on the uj>per side nuich longer
than on the under sid' ; the third joint short, without distinct
hair an(' with a dorsal arista. The ]iosterior transverse vein very
ol)li(pie ; the last segment of the fourth longitudinal vein runs
much forward in its ec jiid portion and ends in the vicinity of the
third longitudinal vein, so that the first posterior cell hecomes
very mirro>v near iLs end. The first joint of the hind tarsi is
without bristles.

The name of ' iie genus (from nxoiyioj, oI)li((ne, and vtvpov, the
nerve) has reference to the extraordinary oblitiucness of the pos-
terior transverse vein. «

\-.U

1. p. Iinivittatus Loew. 9- — Viridis, thoracis vit(a mediA alulo-
ininisiiue fasciis lati.s purjuireis, aiitennis jyediliusqiie nijiiis, feiuorilmrt
viresceiitibus, geiiibus tibiarun)(jae ant»^iioium basi testaceia, alia
cinerei.s. •

Green, middle stripe of the thorax and broad bands of the abdomen of a
purple color ; antennfe and feet black, the knees and the basis of the
four anterior tibiae dusky yellow ; wings gray. Long. corp. 0.25. Long,
al. 0.23—0.24,

Syn. Plnijionniriiit imiriUdtiis LoEW, Wien. Ent. Mon. I, 43. — Loew, Neue
Beitr. VIII. 69.

' M" ^

\ ![•

PT.ACnoNElIirS.

lf>7

I'lU'c iiut very hrntid fur a fciiiiilc. snmcwlint clcvntt'd, ii|inii its
larirtT upper purl willi an improsctl nrHldlc lint- ; the >iiiallir, cdii-
vcx liiwcr part is srparali'il IVmiii the upper part liy a transver>«
swelliuf?, iuniiiiplelc in its niitldle ; the dense, almost silvery-wliilo
dust, enneeals a jrreat deal of tlie ^ruund-eolor of the f'aee, An-
tenuiu Idaek. The third joiut with a short, liut sharp lip; thu
arista rather strong', with a very short lait dislinet pulit seeuee.
Front Itri^iht nielallie hlue-frreen. The cilia on the uppi'r orliit
lilaek. on ihe entire lateral and lower orl)its white. 'I'lntra.x n»e-
tallie-^rreen, only on the lore and lateral luariiin with a litthi
whitish dust, upon the niichllu with a not very sharply detined
longitudinal stripe, which in some directions ap)»<'ars more l)la<'k,
ill others more l)rown and pur|)le, soinetinns of a lieantirnl cinna-
nion-browii color. Scutelhim inetallic-jrreen, with the usind two
strong bristles, otherwise ]>are. On the segments of the al)doineii
the two lirst thirds have a dark, the last third a more ))ale color;
the color of the former i)art shifts from black, throngli bronze-
brown into a boatitifiil dark vi(det ; on the lust third the color is
chielly metallic-green, nevertheless it changes on the anterior part
into stccl-l)lue, and on the hind nnirgin of the segment into golden-
green or almost, a co|)pery color ; on the lateral margin the last
third of the segments is coveri'(| with winte dust. Coxa' Ijlack
with a rather dusky-green lustre; the forenu)st with white dust,
clothed with delicate white little hairs, and at the tip wiili a few
black bristles. Feet black; femora, with green .K.^tre; knees
brownish-yellow ; this coloring extends on the fore tibiii; as far as
the middle, on the middle tibhe as far as the first third, while on
the hind feet it is confined to the tip of the knee. The femora
liave on the under side from the basis almost as far as the tip,
erect, but short, whitish hairs ; otherwise their hair is black; mid-
dle and hind femora have on the front side before the tip a few
insignificant black bristles. The hair u]>on the til)iio is altogether
black, very short, only on the u])]»er side of the hin<l tiliiu' somo-
what longer, so that its great density is easily jierceivod ; nil the
tibifp are beset with slKU't and not very nnmerous black bristles.
Wings tinged with smoky gray, the veins brown-black ; the i)os-
terior transverse vein is so very much oblique as to run ])arallel
to the hind margin of the wing ; the last segment of the fourth
longitudinal vein ap])roaches the margin of the wing rather closely,
without cbaiiging its course, then, however, it suddenly turns

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DII'TKIIA OF NORTH AMiaiirA.

[I'AKT It.

tnwanls the fn»iit, sn us tn cimI nitlicr fur rnmi the lip of tlu' wiiijr
ill the vifiiiity iirtlii> third l<iii^;ititiliiiul vrin.

Ifah. Ciil.ii. (Iliclil.)

Obsr.rration. — 'I'liis spccirs is ulso fniiliil in Itt'uzil.

Oeii. XXXV. MI!V<-.iLi;f>i.

Tlio (rctins riiinralux slinws tin? closest rclafifiiisliij) to tlio
frciicra Scrlhii^ uimI //iiilro/i/mrus. It aj^rccs with tliciii in tin-
rollowiiiff cliuractcrs : Tiu' Ixidy in jrciicral is l)osct willi ncitlitf
iiiiiiicroiis nor lon>f liristlcs. Wiiijfs t'lon)fat«'(l ; tlic posterior
transverse vein very elosely npproxiiniited to tlie marfrin of the
winj;; feet ehiiifrated and slender; the first j(»int of the hind tar>i
on the upper side willntiit bristles, not shorter than the second,
lint in the majority of tlie species, loiijrer. Fa<'e in l»oih se.xes
l)roud, provided with a small tnl)erele npon the lowest third of
each side of thoorhit, and with an indistinct swelling' running' from
one tnliercle to the other. Antenniu rather j^hort, the first joint
witlmnt hairs; the apparently Ijare arista dorsal, distinctly two-
joinled. The hypopyuinni (tf tln^ male iiiihedded.

The aliove mentioned three n'enera diller sufliciently from the
other freiiera of the Jhtlii Ii<tfi(»>ii(hf Ity the altovi; stated characters,
which they have in coninion. The jjeiins Liancnlun in particular,
however, dilVers from Sirlhiit and I/i/tlrniihonift in the followinjr
jioints : 1. All the femora are slender and unarmed, while the
{renera of S<-cllu>i and Hndrdji/ioriix have the femora very much
thickened toward the basis, which at least in the males, is armed
on the under sido ; 2. The sejrnH.uts of the uialomeu are beset
with bristles before the posterior marjrin, which is nut the case
in the s|)ecies of Srrlliia and of J/i/drophoriis.

The freiins Liantaliis contains as yet only three European and
one North American species. They form two g'i<tuj)s ; in the first
the scutellum has only four l)ristles and the exterior appendages
of the hypopygiuni arc more lamelliform, while in tlie second tlie
scutellum has si.x bristles and the exterior appendafjcs of the
hyp(»pyffinm are Hliform. To the first jrroup Iteloiifrs Linncnhts
Imitiilris Scop, and Ii-ncnsfomu.-i Loew, to the second L. virens
►^cop. and the followin<r North American species.

Tho name of the genus (from xuoj, smooth, and o^-xaxij, aim)

i::^ ' » -^-

LlANt'AMS.

10!>

litis riTcroiKT to tlif uiianncd Ton; I't'i't, by wliicli it is (listiiiguishtHi
from llic next rt'lulcU gciiuru of Svellua und Jli/dru^jliurus.

I. li. KCIIllHliH LoEW. % und 9- — V'ir<>s(;«-ii8, tlmrnciH lineix (|uiittinr
iilMloiiiiiiiMiiiii! fjiKciiM oliHcurir*, |i»iili()UH ex iiigro viridihux, gciiiliui* IIhvis,
aliit iiiiii'is iiiiiuulil upiuiili iiigiu, guttuiu fiiiulitluiu iiicluilttntf, oinutirt.

(i iiisli, four liiu'S upon tlu' thorax, iiinl tlitt ImiulM upoii the nli(loni»'n

(lark, fi'i't lllacki^'l•-gr»'^•ll witli ^t-llow kiif«',s ; llin tip t»f llie wiiii? in tli»»
TiiiilH witli !i liliK k Mpot, wiiicli contains ii snuw-wliilu drop. Lung. uorp.
(i.:2(J— 0.28. Long. ul. o.:ii.

Sv.N. Lidntulus yennutis Lokw, Nfue ndtr. VIM, 70, 1.

(Mosi'ly rclntcd to tlic Kiin>|n'aii A. r//v'//s Scop, and very iiiucli
like it, tiioiijrli dilVcring froin it in tlic nciiration and the iiicturi'
of the wiiijrs, as also l)y the frreatiT Iciijfth of the lilifonii appcnd-
u^e.s of the hypopyjrii.in. niut'-jircenish, soinewhat jrray from pah'
tlust. Face jrreeii or l)liie with rather \vhiti>h dust, which, how-
ever does not conceal the >rround-cidor. Tim larp- black palpi,
fringed with black and conipnratividy htuji; hair, when seen from
the sid(!, usually appear entirely fjray-yellowish on account of tlu;
dust, with which they are covered. Front jrreeii and somewhat
spotted witii whitish dnst. Anteniue entirely black. The cilia
of tile posterior orbit black aiiove, whitish ijclow. The upjier
side of the thora.x has two narrow, linear loiijiiliidinal stripes,
separated i>y a reddish-frray middle line; these stripes are rather
black in fully colored specimens ; there are Ix'sides two lateral
stripes, the posterior ]»art (tf which is bifurcated near the trans-
verse suture. Thus, not much is left of the beautiful blue-jjreen
color, except two l)road longitudinal stripes, bearing the stronger
bristles. Sciitellum with si.x bristles, as in A. virciiti. The ab-
domen is jirovided with broad, cop|»er-colorcd or l)roiize-l)rown,
sonietiuies almost black, transverse bands, on the jtoslerior margin
of the segments; on the edge of these' Itands the ground-color of
the alMloineii changes often into yellowish-green. ('o.\a', femora
and tibia; metallic! black-green ; the knees yellow ; the tarsi black.
Fore ct).\ie elongated, cylindrical, on the front side with long
whitish hair, at the tip <iiily with a few small black bristles. In
the male the second Joint of the fore tarsi is nncomnionfy short-
ened and soinewhat thickened, so as to lie the shortest of all j(dnts,
and uliuost as broad as it is long. Cilia of the tegulu; whitish.

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inrrKUA ov N(»KTii A>!i:in("A.

[lAI-.T II.

Wiiifrs with l)Iiick veins, liviiliiic, in tlic fVniiilc with Init fVw irrc-
ffiiliu' j?ray spots upon the iipiciil Inill', in llic nialc niDrcuvcr n(;ir
tin' tip uilli a few <i-i';i_visli-l»lack lon^ilntlinal siriprs, iind mi
tin' tip ilsclf with a hiai-ii spot, rontainiii,i>,- near tlic end ot' tiic
ionrlli lontrilutlinal vein antcrioiiy a i-onnd drop, wiiicli, llu- Ijnlit
ralliiif? 'irou}j:l» it, l>as a snow-while relh-etion ; on the anterior
nnir};i;i of this (h'op, in the Idaek, there is always a smal! paler
spot. The oiitliiu' of the win^s in the male dilVers eonsideralijy
from tlnit of tiie female, heiiiu; not oidy imrrower, hut also sinnated
on their whole jtosterior nnir;:-in in a peeidiar nninner. 'I'lie ex-
terior ap|)endafres of the short hiaek hypopyj>-iuin are two very
loni; threads, which reach liaek almost as far as the hasis of the
al»di>nien, and whieh are beset on their whole k'ngth with very
h)n<r i)ale hairs.

JIah. Middle Stales. (Oslen-Saekeii.)

r.eii. XXXVI. scr.i.i.i's.

Chdrnclcr^. First jcdnt of tiie antenna' eonipariitively narrow,
hare ; the seeoml short ; the third ronnded, ehtnji'ated only in a
hitherto Jindeserilx'd Kuropean species, lud excised on the edfre.
.Vrista dorsal, apparetitly hare, distinctly two-jointed. The front
on the vertex hut little deepened, a little nari-ower anteriorly.
The eyes much hifrher than Itroad, encased helow liy the linear
cheeks. Face of middlinji: hreadth, very lonjr, reachinji; somewhat
helow the lower 'orner of the eye; its lowest sharply-ediicd part
is separated from tiio narrowly-imu'frined eyes by an incision
which turns away from the eyes o?i its upper end. I'alpi recum-
bent, of middling!: and about ecpial size in both se.xes. Proboscis
stout. Fpper side of the thora.x n|M)n its middle with but
short bristles. Scutellum (hit. with two l)ristles. Abdomen with-
out bristles and only with scattered and very short hairs, 'i'ln;
abdomen ot' the malo has fivy scfrinents ; tin; first four are norimilly
developed, while the lifth is usually shortened, often also of a
dillerent color; the followinpj sefjment is formed by tin; short,
half-imbedded liypopyfjiuin. At its low( r end there are two
snnill, dark lamelhe, directed ohli(piely downwards, which lie so
close tofrether ns to present the shapes of a stout, dentiform pro-
jection ; besides these, the comparatively thick penis, bent down-
ward and curved, may be seen, but no other appendaj^es. IJetweeu

scKLna.

Ilic fourth and fifth iil)(ioiiiiiiiiI scf^iiiciits of the male, however, two
loii^r, mostly pah'-cohtri'tl tape- or ihrcail-liki- appciidii^cs iiro'-iidc
whirli are turned cither Imekward or ontwanl ; their phiee of in-
sertion seems to forbid us t(t take them for representatives of tlie
ordinary external appenda<,fes of the hypopy^riiiin ; tluis, we are led
to rejz;ard as such tiie jirevionsly mentione(l inferior appendattes ;
if we do this, tlien the representatives of the interior appendajics
will he wantinjr. nidess these same tape- or threaddike appenda,i,n'S
■tic laken for them. If the point of insertion of the tajiedike
appendiiii-es was really at, the place where they first appear on the
outside, then the (pu'stion would he s<tlvcd, as in such a case they
could not he considered as appciidap's of the hypopyjriuni ; that
h(»wevcr, this is not tin- case, and that they rather orijrinatc much
further inside, and ]»roceed from there upwards hetween the foiirlh
and fifth al»doiiMnal sejrments, hefon; they reai)pcar on the surfin-e,
can he distinctly set n in many specimens; to ascertain their triu^
phu'c of insertion re(piires tlu' anatomical exannnation fif fresh
specimens, for which I have no opportunity at j)rescnt. 'I'hc form
and position of the hyitopyg-ium and of its appendaires in the mah's
of Si-<lli(s has so many peculiar features, that it is dillicuit to
arrive at a conclusion ahout the tru" mcaniiifj; of its dilVcrent jjarts.
The female ahdonieii consists of live normally developed scunients,
followed hy one sej;nient more, which is shortened, rctraclcil, jiiid of
a dilVerent color; IIk; extreme, somewhat opaijuc tip of the femah;
ah(h)meii is heset with l)Iack l)ristles. The feet are trencrally
hare, middle and hin<l feet much lon<;-er than the fore feel, iind,
except th(( thick(!iMn<!: of their femora, which i>elonjrs to the males
of some species, they are more slender than the fore feet ; fore
femora thickened towards the hasis, on the under side with nume-
rous hristles; fore tiltia* on the under side with bristles, elonjrali'd
at the end into a larfr«' tooth, which is still lar<rer in the males
than in the fenudes ; the males have, nn)reover, a stronjr spine on
the inside, not very far from the basis; the nuddle tibia' of the
male are variously decorated with lonjjc curly hairs and sliiV i)ris-
tles, while those of the fenude are ])lain ; the hind tilda- ami the
fe(!t in both sexes jdain, tin; joints of the latter of decreasing
lenjith ; the empndium distinct. Wintrs long and narrow ; the
])osterior transverse vein (»bli(jU(( and close to the nuirgin of the
wing ; the third and fourth loiigitudinul veins converging, the

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202

DirTF.UA OF Nr.r.TU a:\:;::!I(\v.

[part II.

sixili iilinost entirely obi iterated or existing only as but u short
riKJiniciit.

Jii till! genus Lianraliis we have already mentioned the eharac-
ters wliieh this genus has in eduinion with I^ccIIks and Hydm-
phoius, as als(j those which distinguish Scelliis from Liaiualiis ;
to the latter nniy be added the jiresenee of the two ajuiendagi-s,
peculiar to the nndes of t^ct'ltua. The presence of these apj)end-
i\^v^ also distinguishes the species of Scellus from Ilijdroplmru.-i,
where they are entirely wanting. ^Moreover the under side of the
fore femora and of tlie fore til)iie in the species of SccUn.-i is besot
wilii long spines, catching into each other when the knee is bent,
while in the species of JJijdro/ilioni.s there are at the utmost some
spine-like bristles on the under side of the fore femora near the
basis, otherwise the under side of tlie fore femora and of the fore
tildic is only beset with very short thorn-like l)ristles.

'I'lie name of the genus (from oxfxxoj, with crooked feet) has
reference to the peculiar structure of the fore feet.

1 kn<»w as yet only si.\ species of SrelliDi, of which three are
peculiar to North America, one is common to Europe and North
Anjerica, and two are e.vclusively Eurojjean ; one of the latter
species, occurring in Sweden, is as yet undeseribed.

i

;'■■■ ^

^;-.

Table for the determination of the Species,

, ( Wings entirely blackened.

( Wings not entirely blackeneil.
2 ( Apical half of tlie wings black.

( Apical half of the wings not blai:k.
o ( Wings entirely tinged with blackish gray.

I Wings scarcely a little tinged with gray.

1 ezustus Will/:.

2 spinimanus /^ '■

:5

3 avidus, n. sp.

4 filifer, n. sp.

Dcscrijiliiin of the S/iecifx,

1« S. exiistlis Walk. ^ and 9- — Thoracis dorso aeneo-nigro opaoo,
al)domiiio cupreo, latera versus viridi, nitidissimo, halt^iribus nigris,
alls nigricantilius atlversus costani nigris, latnellis analilms maris alhis,
ill basi uigiis, apicem versus flavis, in suninio aj)ice puneto nigro notatis.

The upper siile of the tliorax bronze-lilaek, opaijue ; the abdomen f'opi)er-
colore.i, laterally green, very bright ; halteres lilack ; wings blackish,
towaids the fore margin entirely black ; the anal appendai,"'s of the male
are white, near tlie root black, towards the tip yellow, at tho extreme tip
with a black spot. Lung. corp. 0.22. Loutj. al. 0.2tJ.

'v*'

BCKLLLS.

203

Sy.n. Miditerux cxiistus Wai.kkh, Ijipt. S.iiiiul. 211.
Si I Has (jiixliin LoKW, Nt'tie Ik'itr. Vlll, 71, 1.

jMdlc. Ijlack. Tlio faco ratlu-r narrow, o])a<ino from a briffiit
oclnT-yullow (lust. Anteiiiia' bhuk. Fr .at fovercd willi wliite
(lust. The middle! of tiie iipoor side of the lliorax is, at least in
my s[)eriiiu'n, black, opa((ii(', and exhibits some traces of ^ray
dust; towards the lateral marjrin it i;' more briu-hl and shows a
less disliiu't coppery relleclion ; on the lateral mar<>in itself then^
is a broad lonjritndinal strijjc covered with white dnsl. Scutellum
with two l)ristles, opacpic ujton the middle, with a thin, almost im-
])erceplil)le coat of white dust, briji'ht on tin; sides. I'leunu
bronze-black, on the upper half with a dusky copper-colored reflec-
tion, on the lower half with a thin j;-ray-whitish dust. Alxlomen
l)rillianl coppery-red, in a certain lijz;hl ii ai)pears i)rass-colored
upon the posterior segments, in an ol)li(iue direction even jrreen ;
its first seninent almost reddish-violet. The upper appi'iidiifjes,
)>ecnliar to the males of Sccllux, are of a very considerable lenjrlli,
white, near the root black, somewhat eidarjred at the tip, curved
towards each other and of a yellow color, at the extremi; tip black
and i)rovided with a tid't of pale hairs, which are turned back-
wards. CoXie black, with a thin white-frrayish dust, the foremost
with extremely short pale hairs, with a few stiff l)lack little hairs
and near the ti|) with a few black bristles. Feet black, the femora
more m;'tallie f>'reen-black, with copjjcry reflections; the tore
femora but short, very uim-h thickened, toward the basis on the
whole under side beset with bristles of different len,trth, on the an-
terior side with a row of stift" black l)ristles ; middle femora elon
fyated, thin, gently curved, on the under side almost entirely bare;
the hind femora near the basis of the under side are enlarired into
a hirjre blunt appeiulage, l)eset with larjre black spines, lu'vond
this appendage there is an arch-like excision; then again they are
stouter and beset on the under side with l)lack bristles. The fore
til)ia', which are comparatively stout, bear on thi; front side, not
far from the basis, a stout black thorn, their tip is elongated ;nt(»
a coarse tooth and their under side, which is beset with black
bristles, has sonn-what bcfure this tooth a small excision ; mithlle
tibiie long ami rather slender; their first half has only three short
bristles; the second is fringed on the front sich; with a row of
short black bristles ; upon the posterior side somewhat beyond tho

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204

niPTKIlA OF NORTH AA.KHICA.

[>•

AiiT ir.

middle, tliorc are a few lonp; black bristles, and between ll

ICSC

iind

the tip (tf the til)ia, some lou^-, eiiily iilack hairs. The hind tibia;
are niueh stronger than tlie middle tiliiie, their lirst half is st(»utcr
than the seeond and the front side l)efore the tip is armed with a
strong black bristle. Tarsi jtlain, their joints of decreasing length,
the lirst joint of the middle tarsi with a few bristles. Ilalteres
])rownish-black. Wings bli! kish, all their veins l)roadly margined
with black ; the nuirgins of the costa and of the lirst fonr longitu-
dinal veins are entirely conlliient, so that the anterior part of tlio
wings apjiears altogether lilack ; upon the ndddle of the i)oslerior
transverse vein and u])on the curve of the last segment of the
fourth longitudinal vein there is a black sjxjt ; the costal cell is of
a dark brown color.

Female.. The only female which I possess, is not as well pre-
served as the described male, especially the characters of the face
cannot be recognized with certainty; I would therefore recall the
circumstance, that the face of most of the fennvles of Sirllioi is
less yellow than in the males. The first joint of the anteiiuie in
the female is considera)»ly shorter than that of the male. Fore
femora and fore til)iie less stout, though the tip of the latter has
also a dentiform, but less stout elongation ; their under side has
no excision before this tooth and the front side of the tibia- no
thorn. Middle femora not curved, on the larger half of their under
side with a few sparse bristles. Midille tibia' plain, upon the lirst
half with a consideral)le number of black bristles, upon the latter
})art of the posterior side without the curly hairs which are found
in the male. ]lind femora jtliiin. slender, towards the tij) but
very little stronger, upon the second part of tlie under side with
about si.x rniher strong black bristles. Hind tibiie without the
strong bristle which, In the males, exists at the tip of the front
side.

Ilab. Middle States. (Osten-Sacken) ; Illinois. (Le Baron.)

"Z, S. spininianUS Zktt. % .uid 9. — Thoracis dorso obscure spneo,
albido-jKitliuoso, opaco, aV)(loniine ex viridi cupreo, iiitido, lialteribus
subfuscis, alls iiigris, basi et costre diniidi.'e limbo gu>)albidis. iiiargine
postico into cinereo, lamellis analibtjs maris albis, basim versus infra
nigro-marginatis, apicein versus llavis, in suiuuio apice puncto fusco
iiotatis.

The upper side of the thorax dusky bronze-colored, with whitish dust ;

SCKLLUS.

205

aliilonicn coppery- green, briglit ; halteres lirowniVh : wirfrs Mack, tliouph
tilt! mot and the iiiargiii of half the costa is whitish, the whole posterior
iiiaruiii «ray ; anal ajipemlages of the male white, towanls the hasin on
tlie under siile with a hlack margin, towards the tip yellow, at the ex-
treme tip marked with f hrown spot. Long. corp. (LIT). Long. al. 0.1'.'.

Syn. l/ijilro/ihoni.-i iiotdhm Zkitkksi ki>t, Ins. Lapp. 701, 4, //( olm.

llijilidjihorua sjiiiumnniiii ZKTiKusrKirr, Dipt. Scand. II, 44.'), .I.

Moh\ Blackish hroii/.e-culonMl. Tlie fmn- is ('(mijtnralivcly a
littio Iti'uader tiian in S. e.rttstus, covoitmI vvitli brifrlit (tcliro-ycllow
(lust and opa'jue. Antonmu Idack. Front with whitish tlust.
The fri'oinul-c'uior of the thorax is (»f a cMHtpery-hronzc ; u))on tlu'
niicUlit' of the ujiper side more of a hlackish-lironze, l)ut almost
everywhere so thiekly covered with dust that the copjx'ry lustre
is only very little pereeptilde ; tiie dust on the upjjer side of the
thora.x is snow-white, ui)on the two longitudinal stripes near the
lateral marj^in it is less thick, so that the coppery reilect ion of the
{iround-color is more distinct ; upon the middle there are two nar-
row, dark longitudinal lines, close to each other, which do not
reach as far as the posterior nnirgin of the thorax. I'pon the
]»leura' the color of the dust is more yellowish. The scutcllum has
two l)ristles, is rather opaque, with a thin whitish dust. AI)do-
men green, mostly with a coi>j»ery lustre, which l)ecomes much
more i)right near the lateral margin. The anal apjtemhiges are
of middling length, white, near the i)asis on the lower nnirgin with
a narrow black bcn'der, and on the upju'r margin usually nuirked
with a blackish spot ; beyond the nuddle they are inflected uj)-
wards and gradually assume a yellow color; their extreme tip is
marked with a snnill ))rowii spot and bears a small tuft of delicate
])ale hairs, which are turned backwards; about the nnddle tif the
interior margin there is a similar jjubescence ; between them,
towards the anal region, there is a snnill tuft of delicate whitish
hairs. Coxte bronze-l)lack ; the four anterior with yellow and the
two hind ones with a rather whitish dust; the fore coxic with very
short and delicate i»ale hairs, near ami ujion the tip with a few
black bristles. Feet black, femora and tibite more l)lack-green,
the former bright coppery. Fore femora short, towards the basis
very much thickened, beset on the under side with bristles of dif-
ferent length, on the front side with a row (»f stiff l)hick bristles.
Middle femora long, stronger than in ,S. cri/.s/w.s and more curved,
on the latter half of the under side with erect black Ijristles. Hind

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DII'TKRA OF NORTH AMERICA.

[part ir.

tViiujra (if a plain structure, not stouter than the middle! femora;
tiieir under side lias only close liefore the tip, a few lilack liristies.
The eoiiij»iiratively stout fore tihiiu have on their front side, not
fiir from tlicir hasis. a stout black thorn ; their tii)is elonjjatid into
a very stout tooth, !)efore which the underside of tiie til)ia', which
is beset with strong Ijristles, has a small excision. Middle til^iie
not (piitc so long and slender as those of S. cnixdis, on the up^ier
side only with three or four short bristles, on the under side with
a row of extremely long, straight, erect black bristles, and on the
hind side with long curved hairs, which latter are more dense near
the tip and curl tij) to the shape of a lock of hair. Hind tibiie
plain, scarcely stouter than the middle tiidai ; on their upper side,
not far from the basis, there is a strong bristle, and on the latter
half a few small l)ristles ; the under side is beset with short small
bristles, which are isolated upon the first ))art and closer together
and in more regular order uixm the second half; at the end of the
under side there is a considerable number of less strong and less
short bristles, of which the last is distinguished by its greater
length ; on the outside of the tij) of the tibia; there are several
short and tine longer anci curved bristle, which has almost the
thickness of a thorn. Tarsi plain, the joints of decreasing length,
the first joint of the fore and of the middle tarsi with more, that
of the hind tarsi with less bristles. Ilalteres yellowish-brown, the
lower part of the knob more dark. The wings of uiuform breadth
and at the end more rounded than in the other species ; an nii-
connnonly large black spot covers their apical half with the excep-
tion of a l»roa(l gray border on the posterior margin, and extends
as a broad cloud along the fifth longitudinal vein almost as far as
the anal cell ; inside of the discoidal cell it is somewhat ))alcr,
otherwise, however, so dark that the two black spots, peculiar to
this genus, upon the po.sterior transverse vein and upon the last
segment of the fcturth longitudinal vein, can oidy be ])erceived
when the wing is held towards the light; the anterior part of the
wing from the basis as far as the middle is dingy-whitish hyaline;
the anal angle and a broad border along the posterior margin are
more hyaline-gray.

JFlab. Fort Resolution, Hudson's Bay Territory. (Kennicott.)

Female. It is distinguished from the male by the following

characters : Face with pale yellow-grayish, front with brown dust.

The middle of the upper side of the thorax with yellow-brownish

SCELl.US.

2CT

dnst, marked with a few spots of wliitisli dust. Its latoral stripes
are eoverod with brown, the edjre of the lateral inar};iii. however,
again with gray-whitish dust. The al»d<jinen is nutre green, k'ss
eoppery and less bright than in the nuile. The dust ujiou the
])leune and upon the fore eo.\a3 is less yellow. The fore femora
are of a similar structure as those of the male ; the fore tibia' with-
out a thorn on the inside, elongated at the tij) in a much smsiller
and sharper tooth, before which there is no excision ; otherwise
the feet are plain, the middle and hind femora straight and much
more slender than in the male ; middle and hind tibia; only sparely
beset with scattered bristles.

Obsfrradon. — As I do not possess a N(>rth American female
of S. Kjnnipcs, I have prepared the above description fr(»m
Swedish .specimens.

3. S. aviilllA, nov. sp. % . — Thoracis dorso a?reo-ni,irro, nitido, mar-
gitie et linea media cinereo-pollinosis, pleiirariim plaea suiieia, atxlo-
inineque t'X viridi Iwte cnpreis, iiitidissiiiiis, haltorihus all'is, alls finf-
rei.s, piuic-tis duolius iiigris, altero in vena tranrtVHrsa postiTiore. altnio
in uUiiiio vt^iiie longitiidinalis (luartre segniento; laiuellis aiialilms maris
albis, basi et apice tainen nigris.

Upper side c>' tlie thorax bronze- black, shining, its margin and a middle
line du8i with gray powder; a large spot on the upper part of the
pleurae and the abilomen bright greenish copper-colored, very shining ;
halteres white ; wings gray with two large dots, one on tlie posterior
transverse vein, the other upon the last segment of the fourth longitu-
dinal vein; the aual appendages of the male are white, but their basis
and tip are black. Long. corp. 0.17. Long. al. 0.21.

Male. Face somewhat broader than in the previous two spe-
cies, dusted with bright ochre-yellow powder, op;uiue. Front
with white dn<t. Antenna' black. Most of the upper side of the
thorax bright bronze-black with faint violet reflections: its whole
margin has a rather broad border dusted with a whitish-gray pow-
der, and therefore opaque ; there is also a narrow middle line,
which is much abbreviated behind and likewise dusted with a
white-grayish powder. The up])er part of the pleura\ from the
shoulder to the root of the wings, is entirely without dust, metnllie
greenish copper-colored, very much shining; as I have only a sin-
gle specimen, I am unable to judge with certainty wlicilur this
large shining spot is also present in fresh sj)ecimens, as I believe
it to be, or whether in the al)ove described specimen it is merely

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pii'TKUA OF N(tiiTir A>:r.iurA.

[

I'Airr II.

rubbcil (iff; the oilier jtarfs of tlic ))UMirio arc dusted with jrray.
The sctili'lluiii, wliich liiis two bristles, is j^reeuish Itroiize-eolored
and opiuiue. The very shining" alMlonieu is of a l;ri<iht ectppery
fulor, l)ut assiiiues, when its suiiaec is Inoked upon in a vory ol)-
]i(|Ue direct ion, a <rreen or at least brassy -yellow eolor. The tape-
like anal ai)peiidaf>es are very loii^-, somewhat lilaekened at the
basis, and still more so at the tip which is turned upwards, and
there beset with a small tuft of l)lacki>h hair directed backwards;
otherwise their maririns are not hairy, althoiijih there is a sinjile
black l)ristle where the blaekenin;; of the tip l)egins on the under
side in the vicinity of its inner iiuirj.'in. Near the anus between
the above mentioned two apix-nda^es there ore a few small black
liairs. Coxie greenish-bhudv, with white-yellowish dust ; the fore-
most have besides some |talc hairs, almost inii)erceptil)le on account
of their shortness and delicacy, a few black bristles before and n}»on
the tip. Feet black with a metallic-^reen rellection, which gra-
dually disa|)i>ears t poii the last joints of the tarsi. Fore femora
towards their root lot so much thi<-kened as in the two precediufj;
species, lieset with stroii;; black bristh's of diircrent lenji'th on the
under side, on the front side with a sjiarso row of short black bris-
tles. Middle and hind femora lonu:, slender, straif>'ht, of a ])lain
structure, beset on the second half with a imxlerate number of
short, scattered black bristles. The moderately stout fore tibiie
bear on their anterior side, not far from the basis, a short black
thorn and are prolonj,a'd at their tip into a larfre, somewhat clumsy
but sharp tooth, before which the under side of the tibia, provided
with bristles, has a very small excision. The middle tibia) are
long and slender ; on the upper side they are beset with only three,
on the anterior side with about seven scattered bristles of very
moderate length ; on the other half of their hind side they bear
long curly black hairs. Hind tibiie slender, straight, rather long,
only on the second half witli a few isolated black bristles; the
bristles on the outside of their tip are also only short. Tarsi
l»lain, their joints of decreasing length ; the first joint of the fore
and middle tarsi on the under side with numerous black bristles,
the first joint of the hind tarsi oidy with a few and much shorter
bristles. AVings hyaline-gray, somewhat darker towards the tip
on account of the gray margin of the second, third and fourth
longitudinal veins ; upon the posterior transverse vein and upon

SCELLUS.

209

II11' middle of llic Inst sofrinciit of tlio foiirtli longitudiiml vein tliuru
is ii ^•riiv-ljlii<.'lvi.>li spot of (Miiisidci-ahlt' si/c.

Hah. Fort Kcsoliitioii, Jliidsoii's i>ii}- Territory. (Ivtiiiiicott.)

4i §. filifrr, nnv. sp. %, — Thor.icis dorso clni-n'o, opnrn, abiloniine
ciiprco, fiiiorfo-polliiioso, sulxipaco, lialteiihiiH alliiilis, alls livaliiiis iu
luisi subaliMdis, apicciii versus ciiu-rea-striatis ])iiiii:tis4ii(! (IikiIuis iiui-
jusculis nigriciintibiis, alteio didyiuo in vciiii tniurtversii posteriore,
ftltcro simplici in ultimo vtMue loni,'itudinalis (]uarta' segnicnto ; lanudiis
analibtis niarid angustissiuiis albis, in basi nigri^, la etuniutu aiiit;*; lla-
viuantibus.

Upper side of the thorax gray, opaciuo ; ab(h)nien copin-r-colored witli gray-
ish dust, ratlicr opacjun ; lialterfs whitish ; wings liyaline, wliitisli near
the root, with gray striiK-s towanls the tip ; upon tlit^ jiostf'rior transverse
vein with a donbh? blackisli sjiiit of considerabhi size, and witli a simi-
lar, but single sjiot upon the last segment of the fourth longitudinal
vein ; the anal appendages of the male are very narrow, white, blai;k .at
the basis and yellowish at the extreme tip. Long. eorp. 0.15. Long.
al. 0.20.

The narrow face is ochro-yoUow. AnteiiiUK Ithick. Front with
wliitc dust. Tiiorax l)lackisli hronzc-colored with coppor-culonMi
rolloctioiis ; on the iipi)t'r .side with tliick wliitish dust, whicli
almost c'OiK'eals the groinid-color, opatpie ; upon tlie jdeura' with
a somewhat thinner dust of tlie .same color. \'\\n\\ the middle of
the njtper side there are two narrow parallel lines of a darker
['olor, which do not reach as far as the posterior maro:in of the
thorax. Tlie sctitellum, whieli has two bristles, is of tlie same
color as the pleunu. The frround-color of the ahiloinoii is like
that of the thorax, is, however, more distinct, not lieinj;^ so thickly
covered with dust ; towards the lateral nuu'fiiu of the abdomen,
where the dust almost entirely disappears, there is a briuht eop-
l)er-colored lustre. The anal api)endages of the mule, which are
turned upwards at their tip, are not ribbon-liko. as in the ])re-
viously described three species, but liliform, white, black at the
root, at the tip pale-yellowish to a snniU extent ; on the middle of
their exterit)r nnirgin there is a dense beard of delicate little white
hairs ; there is no tuft of hairs at. their tip. Between them, in the
anal region, only a 'noderate number of .short delicate little hairs,
which may be easily overlooked, are inserted. Coxa3 of a bhick-
ish-bronze color with whitish dust ; the fore coxa3 have, besidcd
U

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210

DIl'TKRA OF NOIlTir AMKIUCA.

[PAUT If.

1lit' i>:ili', nn(1,nn nreojiiit of its sliortucss and (Icliciicy, jilinost im-
]»( r(t|ttil)l<( iHiboHconci', (luitf a iiiiiiiIh'I' of black bristles. J-'dt
black, the ft'inora with a nioro coinjery, the tibiie with a jiiorc
mctallic-fri'ccMish tiiijre. Vura femora rather stnnijrly tliiekeind
tiiwanis the l)asis, on the under side with stnni'i' black bristles of
dill'erent lenjj:th, on the front side only with an imperfect row of
short black l)ristles. Middle femora moderately thickened and
stroiifrly curved, on the under side of the basis with two or tiiree
Hot very lonj?, on the apical half with a larji'e nundier of loiiu',
straiii'ht and erect l)ristle-like Idack hairs. Hind femora plain, of
middlinf^ stoutness, on the under side with bristle-like short hairs;
on the up))er sid(! with two lonji'er black bristles, of which the
larf?cr is not far from its tip. J'ore tiljiiu stroufr, with a laruc and
sharp thorn on the front side, not far from the basis ; elongated at
the tip into a larjre clumsy tooth ; the under side of thetiltia, pro-
vided with bristles, has no distinct excision before this tooth.
Middle tibia' lonu", straifi'ht, a little stroiifrer in the neighltorliood
of the basis ; tlse lirst two thirds of their under and jjosterior side
are frii.ucd with lonji* curly black hairs, the end of the under and
front side, however, with lonn' and stiif black bristles ; on the under
side, where these bristles beji'in, there is between them a some what
curved black thorn. Hind tiliia' straijrht, on the under side witli
short b\it very stronjr black bristles, one of which, bein<r not far
fronr the tip, is remarkable for its frreater lenjrth ; on the outside
of the tip of the tibia; a few shorter and one somewhat lonu-er
curved bristle are inserted. Tarsi ])lain, their joints of decreasinji:
len.uth ; the lirst joint of the lore and middle tarsi on the under
side with black bristles, which are of considerable length near the
basis of the tarsi, but decrease in length very rai)idly so as to be
very short on the larger portion of the joint ; the under side of
the lirst joint of the hind tarsi is everywhere beset with short black
l)ristlos. llalteres pale-yellowish, but the basis of the knol) some-
what brownish. Wings hyaline; almost the whole basal third
api>ears sonu-what whiti.><h when seen in a certain direction ; gray-
ish stripes along the second half of the second and third longitu-
dinal veins, likewise along the tij) of the last segment of the fourth
and the greater ])ortiou of the fifth longitudinal vein ; there is
also a gray streak 1)etween the third and fourth longitudinal veins;
upon the posterior transverse vein there is a blackish-gray doul)le
spot, and upon the middle of the last segment of the fourth longi-

p

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lIVDIinl'llnlUS.

'J 11

(iiiliniil vein there is a iiirix'T ntmided liliickisli-^rrnv spot, uliidi is

less sliurply (ieliiied on tlie smIc tiiriK.'d tuwnnls the li|Mtr the wiiiL'.

Hub. Fori lle.sulutiou, Jludsou's IJny Territory. ( Keiinieotl.)

Hi

Qeii. XXXVII. lIVDKOrilOlll N.

Charadcr.-'. Tlie first joint of the jintennie sliort, Iiare ; the
.second very sliort; the third rounded, more or less distinctly
notched nnder its lip; arista dorsal, t\vo-Jointe<l, apparently liarc.
Front u little excavated on the vertex, narrower anteriorly. Kyes
lar^;c, hiu'her than broad, encased licluw in the cheeks, which in
their structure resenil)le those of (hi/idc/iilc, and are Itroader thiin
in the other genera. The face reaches somewhat Itelow tin- lower
ooriu'r of the eyes ; it is scarcely narrower in the nnile than in the
fennile, its two upper thirds are nsnally a little ettiieave ; the lowe.-t
third is sei)aruted from the upper one hy two knotlike elevalions
near the eyes, is convex and emls in a sharp rounded edire. j'ro-
Ijoscis of moderate thickness; jtalpi incinnlicnt, in lioth sexes
rather small. I'pjier side of the thorax oidy with niodcrati'ly
lonfij hairs ni'on its middle. Scutellnm rather Hat, thon,u'h some-
what elevated alonji: its middle line, in all s))eeies known to me
with four bristles. Abdomen broad and rather Hat, very short,
withont bristles; il has live seuinents in both sexes. 'J'he hypojty-
jriiim of the nnde is snuill and ind)edded ; at its lower end there
are two small, dark-colored lamclhe, oblicpu'ly turned down, and
so closely approxinnited that they seem to form but one clnm>y
dentiform jjrotuberanee ; usually no other appemlajics are ^I'cn
besides these. Feet generally bare; nuddle aiul hind feet much
longer and more .slender than the fore feet ; fore femora gradually
rather thickened towards the root ; on their under side, either in
b(»tli sexes or at least in the nuile, with short, thornlike bristles;
sometimes they are beset with a few longer and thornlike bristles;
fore tibiiu on the under side densely beset with very short thorn-
like bristles; mithlle til)ia' never beset with longer hairs, even in
the nnde; tarsi plain, their joints very much decreasing in length;
the empodiiim very distinct. Wings long and narrow ; the pos-
terior transverse vein close to the nuirgin of the wing; the thii'd
and fourth longitudinal veins usually somewhat converging towards
their ends; in some si)ecies they are parallel ; the sixth longitudi-
nal vein usually apparent as far as the nuddle of its course.

4

212

Itll'TKKA OP NdllTII AMKIIICA.

[I'AKT ir

Jfifilmphorus dillVrs fntiii Si-cIIkk liy tlic font femora and IWro
til)iii' iiol Ix'iii^ provided mi tlie under side with Inii^ tliuriis,
cuteldlif? l)et\veei» eiieli otlier, hy tlie tip ot'tlie (ore til)ia! lint Itein^
flitiipited iiiti) 11 eliiiiisy |ir(ijeeti<iii, liy llie middle tiliiie of the iiiide
not lieiii^ iKhii'iied with h)n^: hair, hy the liypupypiiim not having-
those peculiar pale-eoh»red appendages, wliieh distin^riiish the
Hpeeii'S of Scrlhii<, \'e. fJiiiiraliiK has no notelies on the tliinl
joint of the ttiitenmi', its fons femoni are not thickened and iiii-
aniied, and it has Inislles hefore th(! incisures of tiie iil)domeii, so
tliat no mistakcr can occur l»clwccii the species of l/i/ilrojilKirns
and Lidmnliix.

The name of Ili/iIroji/inrHs (from iijup, water, and <^ipfiv, to
carry) has becu hestowed upon these insects with reference to tlie
uliility of many of tiie species to run even upon ajiMtatcd waters.

The species of J/i/itropliorun known to nie are distriliuted over
Europe, Nortliern Asia, Africa and Nortii America. 'I'here is no
l»erccptii)le haltituai dilferonfo bctweeu the species from the dif-
ferent parts of tlie gh)be.

Tabic for ihi' determination of tlie S/nciis.

1 innotatus, iiov. s]).

, ( Face with white dust, shining green above.
* Face with brownish-yellow dust, opanue aliove

IS convtTgt
Id parallel

,, ( Tliird and fourth longitudinal veins convergent.
( Third and fourth longitudinal veins

- pirata /.»•.
3 parvus /.n\

\-k

\. iM

Description of the Species,

1. II. ilinotatllH, nov. sp. % and J .— Olivaceo-renens, scntcllo
virescente, abdominr -^iridi, femoribus til>iistine viridibns, tarsis nigris,
facie supra viridi-sp'.i.-ndente, polline pleurarvim albido, venis alarum
cineraspentium atris, longitudinalibus tertiii. et (luarti apicem versus
paulo couvergentibus.

Metallic olive-brown with greenish scutellum and preen abdomen ; femora
and tibiie green; tar.si black; face shining green above ; pleurre with
whitish dust ; wings gray with black veins ; the third and fourth longi-
tudinal veins somewhat converging towards their end. Long, corp,
0.13. Long. al. 0.22.

The dust upon the face is ycHow-brownish immediately below
the antenna) ; otherwise everywhere white in the male, but so thin
upon the entire ui>})er part of the face that its metallic-green color
l)ecomes distinctly i)erceptible ; in tiie female the face is covered
with white dust only along the sides, upon the middle with

IIYDUUPIIOIUS.

218

liria»iiisli(liist. Aiitriiiiiv entirely liliick. Fmnt frreenish-lilnck,
<i|iiii|iic ; si't'ii ill all <il)lii|iii> ilirectidii ilie euveriii^ of lirowii dust
ll|Miii il lieeoiiics )M're('|ilil)le, wliifli otiierwise is visilile niily iiii tilt;
iiiileriu,- iiiiir^iii. The ^'I'ltiiiiil-color of tlie oecipiit is green himI
lull lillleeovered willi l)lii\Miisli-jfriiy (lllst. Tlie ciiiii of tlie ll|»|»er
url)it are, as usual, liliiek, llio donst" and lialr-like eilia on tlie lute-
riil and inl'erior orltits, liowever, ni<ty-yellovvisli. Tlie ii|i|»er sido
of lilt! tliorax metallic olive-hrown ; the liiiidiiiost part with a
nietallie-;rrecii relleetion ; the dnst upon it is lirowii. Seiitelliiiii
with four lirislles, shiniiiir, rather jrreeii, tlKHigh soiiiewhiit ei)pper-
eolored iipnii its middle. I'leiiriL' and coxie with whitish dii>t.
Alidomen metallie-greeii. sliiiiiiifr. espeeially on tiie sides; tiio
short hair upon it is Maekish, upmi the sides of tlie first segment,
however, I'allow-yellowish. Fore coxiu on their front side with a
very short ami delicate whitish piiheseeiice, Iiesot on the upper
half of their exterior side with a moderate numlter <»f eomparu-
tively long Maek liristles; a few of iIk'Hi are also at the tip.
Femora slender, green, with an almost iinpereeptilile grayish
dust ; the fore femora as usual thickened towards their l»asis, and
beset on the under side near the Imsis with four or five rather long
thoniliko l)ristles ; Iiesides these there is, nearer to the anterior
nnirgiii, an apparently inconijilelo row of very short hristle-like
little hairs, which are biitdiflicult to perceive. Til)ia' dark green,
the foremost on their under side uniformly fringed with very short,
lilack thornliko bristles. Tarsi black. Cilia of the tegiihe yel-
low. TIalteres with a dusky yellow jieduncle and with blackened
knol). Wings very long, tinged with gray, not darker towards
the anterior margin and with veins which are lilack up to the ex-
treme root ; the end of the third loiigitudii.uiI vein is somewhat
curved backwards so as to converge distinctly towards the fourth
longitudinal vein ; no dark spot is to be seen neither upon the
fourth longitudinal vein, nor niton the convexity, crossed by the
last segment of the fourth longitudinal vein.

Hah. Sitka. (Salilberg.)

Ohscrrafion. — Notwithstanding the not unimportant dinVrence
in the coloring of the dust on Mie lower part of the face between
the two sexes described above, I have no doubt that both lielong
together. From the other Xorth American species, known to
me, //. innofatiis dift'ers by the shining green color of the uitpor
part of the face. AiiKjiig the Kuroiiean species it can only be

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214

DIPTERA OF NORTH AMKRICA.

[part II.

compared to hallirus Moifj^., atpinun Walilh. and calloalomits
Lvv. It can easily be distiiig-uished from b(illicu>i hy the dark
knolj of tlio lialteres ; from (tlpinun by the want of a curved tlinni
at the end of the fore tibiie ; from calloi^loinu.s Ity its more con-
siderable size and a comparatively narrower face.

2. II. pirata Loew. 9 . — Olivaceo-seneus, thorace et scutello cnpico-
spleiitlt'iitiliUH, abdoinine viresceiite, t'eiiioribus titiiisciue viiiililnis, tarsis
iJgris, polline faciei opaciu ex fusco ocliracoo, pkuiraium ijollinu alhido,
vunis alarum cinurasctiiitiuiu nigris, loiigituiiinalibu.s terlia et ijuurtii
apicem versus paulo convergentibus.

Metallic olive-biown, thorax and scutellum with a copper-colored rcllt^x-
iou ; abdomen greenish ; femora and tibiic gretai ; tar.si black ; the dust
upon the opa(iue face brovvnisli ochre-yellow ; that of the jiiiHirie wliiUsh ;
wings gray with black veins, the third and fourth longitudinal veins
somewhat converging towards their ends. Long. corp. O.I'k Long. al.

o.-i-i—o.-m.

Syn. JIijdro])horus pinila Loew, IS'eue Beitr. VIII, 71, 1.

Face v.itii l)rownisli-ye!Iow dust, entirely ojjaciue. Palpi black
aid covered with black hairs, on the ui)i)er side with Itrownish-
yellow dust. Antennte entirely l)lack. Front brownish-l)l;ick,
opa(iue ; when seen in an obli([ue direction, it seems as if partially
covered with brownish-yellow dust. On the occiput the ground-
color is green, however almost entirely covered with grayish-
yellow dust, or rendered very opa(jue. The cilia of the u})})er
orbit are, as usual, l)lack, the dense and hair-like cilia of the
lateral and inferior orbits however, yellow. The upper side of the
thorax is metallic olive-J)rowii with a copper-colored reflection ;
the scarcely perceptible dust upon it is brownish-yellow. Scutel-
lum with four bristles, shining, copper-colored upcju the middle,
on the margin green. IMeurie and coxio with whitish dust. Ab-
domen ujore green than the thorax and with a coi)pery tinge, upon
the greater portion of the last segment and upon the posterior
margin of the preceding segments usually beautifully green ; its
short hair is l)lackish, oidy upon the posterior margin of the lirst
and of the last segment it is i)ale. Fore coxa? on their front side
with a very short and delicate whitish pubescence, on their ex-
terior margin fringed with black, stiff, but not very strong, bris-
tles, of which there are also a few on the tip. Femora slender,
greer, and covered with thin, almost imperceptible, whitish dust ;

HYDllOl'HOULS.

i>15

tlio fore femora as usual, tliickc'iuMl towards the Itasis, on thoir
umk-r sido with two rows of tliorn-likc hristlos, the inner row of
which I'eaclies as far as their tip, while the exterior one stops
already on the nii(Mle of the femora. Til)ia' dark-green, tlie fore-
most uniformly fringed, upcjn their U'lder side, with very short
thorn-like l)ristles. Tarsi black. Oilia of the teguhe fallowish-
yellow. JIalteres with a dusky-yellowish ])eduncle, and witii
blackened knob. Wings very Ictng, tinged with gray, not darker
towards the anterior margin, with black veins up to the extreme
root ; the end of the third longitudinal vein somewhat approaches
tin; fourth, so that these veins converge distinctly towards their
ends ; upon the posterior transverse vein and upon the convexity,
which the last segment of the fourth longitudinal veins crosses,
there is a somewhat more gray sp(jl, which in almost invisible to
the naked eye.

Ildb. Pennsylvania, District of Columbia. (Osten-Sacken.)
Ohscradioii. — It is dilliciilt to d(;termine, whether 7/. jufn/a is
not one of those four species of JJi/drop/iondi which Mr. Walker
has described as si)ecies of Mi'dcleriiH. They agree in a good numy
resi)ects not only anH)ng themselves, but also with 11. ])iral(i,
while each of them exhil)its also some distinguishing feature. //.
viridijla.'i must be much more green, according to Mr. Walker's
statements, than //. pirala; besides, the cilia of the inferior ori)it
of the former one are white, while those of the latter are yellow;
moreover, its abdomen is conical and longer than the thorax, an
entirely uncommon character for a female of JJiftlrop/ionis, anil
making it ahnost doul)tful whether it really behjngs to this genus;
finally the veins of the wings are said to be brownish-yellow near
the root of the wing; these discrej)ancies are altogether too great
to justify the sup})(»sition that JJ. jiirula can Ite identical with
vu'idijIoH Walker. The faci; of \Valker's fenuile of II. (jhibcr is
said to be covered with giddeii-yellow dust, the abdomen on the
ui)i)er side clothed with brownish-yellow hairs, the femora rather
stout and the halteres brownish-yellow. These dilferences are
likewise too important to adn;it the identity of il. pirala with //.
(jlahcr. The fice of Walker's fenuile of II. cfiri/.sohMjun is said to
be also covered with golden-yellow dust; the wings are said to be
brown along the anterior margin, and to measure only three lines
in expanse, whereas they measure six lines in 77. pirala Under
such circumstances the identity of these species is out of question.

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210

DIPTKRA OF NORTH AMKRICA.

[PAUT II,

■■J.

In Walker's description of H. albojlnrens, the brownish-yellow
color of the dust upon the face, the color of the haltercs and th(3
black color of the hair on the upper side of the abdomen, agree
better with //. pirata; but it is added, that the thorax is covered
with brownish-yellow dust, that the dust upon the femora is of the
same color, and finally that the pulvilli are of a pale-yellowish
color, of all which there is no trace in H. pirata.

3. II. parvus Loew. % . — Olivaceo-aeneus, thoraoe et scutello cupreo
resp'.endentibus, abdomine obscure vire3oente, femoribus tibiisque viridi-
bus, tarsis nigris, polline faciei opaoseex fusco ochraceo, pleurarum poUine
albido, veuis alarum ex uigro cinerascentium nigris, longitudiualibus
tertia et quarts perl'ecte parallelid.

Metallic olive-brown, thorax and scutellum with a copper-colore''. re-
flection; abdomen dark-green, femora and tibise green, tarsi iilncV. ♦i^;
dust upon the entirely opaqut- face brownish ochre-yellow, that on the
pleurie whitish ; the wings blackish-gray with black veins, the third and
fourth longitudinal veins entirely parallel. Long. corp. 0.09 — 0.10.
Long. al. 0.13.

Syn. Ihjdrophorn>i parvus Loew, Berl. Entom. Zeitschr. VI, 214, 67.

Resembles in the structure of the body //. pirata very much,
but sufficiently distinct from it by its smaller size, a more blackish
color of the wings and the complete parallel course of the third
and fourth longitudinal veins. Face with brownish ochre-yellow
dust, entirely opaque, very much narrower upwards. Paljji black,
antenme also black. Front almost velvet-black, with yellow-
brownish dust, which is not distinctly perceptible in every direc-
tion. Ground-color of the occiput green, covered above with
yellowish, below and on tlic lateral margin with wdiitish dust.
Cilia of the upper orbit black, of the inferior one white. Upper
side of the thorax metallic olive-brown with almost violet and
coppery reflections, the latter of which form two indistinct longitu-
dinal lines and are more extended near the posterior margin of the
thorax. Scutellum shining copper-colored, with four bristles, the
lateral bristles much shorter than those which are nearer to the
tip. The abdomen is green, rather opaque, upon the middle
somewhat coppery, on the lateral margin and on the under side
distinctly covered with white dust ; the very short hair upon it is
black. Coxa3, femora and tibios black-green. The fore coxrn
arc fringed on their front side with very delicate whitish hair

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ACIIALCIS,

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which, on account of its shortness, is difficult to iicrceivo ; (in
thoir exterior side some short white litth.' liairs are also inserted;
one of the uppermost, however, is sometimes of a lilaeU coliM".
The fore femora, which are moderately thickened tcwivrds the root,
have, on their under side, a dense row of verj' short, straiji'ht,
erect little bristles, and near the basis two or three longer bristles.
The under side of the fore tibise is also provided with a dense
row of very short small bristles. Tarsi black. The haltcres
appear to be black. Wings long, tinged with a gray-blackish
color, not darker towards the anterior margin, and up to the ex-
treme root with black veins ; the end of the fourth longitudinal
vein is completely parallel to the third ; the posterior transverse
vein is perpendicular, without dark margin and dark spot upon its
middle ; the convexity crossed by the last segment of the fourth
longitudinal vein is not darker than its surroundings.
Uab. reuusylvauia.

Gen. XXXVIII. ACIIALCUS.

Characters Color non-metallic. The first joint of the an-
tcnnte glabrous, the third pointed-ovate ; the long and slender
arista subapical. Face narrow. Alidonu'u with six segments in
both sexes ; the female aljdomen at the end without a coronet of
bristles. Ilypopygium small ; its exterior appendages have the
shape of small lamelhe. The lirst joint of the hind tarsi without
bristles, shorter than the second. The sixth longitudinal vein of
the wings is wanting.

It is impossible to overlook the relationship of the genus
Aclialcus with the four following genera, which are distinguished
by the posterior end of the thoracic dorsum being provided with
a concave area.

This relationship is also illustrated by the want of the coronet of
bristles on the posterior end of the female abdomen, which Ac/iali-Uf^
has in common with these four geiu'ra. 1 have only a few speci-
mens of Afhalcufi Jldficollifi in my possession; the manner in
which they are ))inned renders it iinpossil)le to ascertain whether
the posterior end of the upper side of the thorax has a concave
surface or not ; it seems to me that the latter is the case.

The name of the genus (from a, iion, and ;ta'^«05. brass) has refer-
ence to the nou-nietallic color of the species.

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218

DIPTKUA OF XollTir AMERICA.

[part II.

The few spi'cics of Avhalvua as yet known, '>elong all to the
European fnuua.

Gen. XXXIX. 9IEDETERUS.

Chnrncterb. Face of both sexes rather broad, and in both with
a transv(!rse swellinu: l)elow its middle. The jtroboseis very niueh
swollen ; when in repose, both sides of its ojjening are so close
tojrethi'r, that its lower surface forms but a sin«>-le convexity. The
first joint of the antenna' jilabrous, the third rounded or scjmewhat
ovate, with a slender apical or subapical arista. Eyes not hairy.
The upper side of the thorax on its posterior end with a concave
declivity. The hypopyjriuni with a short peduncle, entirely dis-
en<j:a;.?ed, inflected under the venter, with rather short appendages.
Feet rather long and slender, almost entirely without bristles ; the
first joint of the hind tarsi without bristles, shorter than the second.
The third longitudiiud vein, in most of these species, ends not far
from the ti}) of the wing, and the last segment of the fourth longi-
tudinal vein converges towards the third.

The genus consists of two groups; the first of these differs from
the secoud by the shorter distance of the posterior transverse vein
from the margin of the wing, by a stronger convergency of the
third and fourth longitudinal veins, by the snuiller length of the
first j<jint of the hind tarsi and a more slender structure of the
body.

The name of 3Tcdetcri(/i (from n^iin^ioi, neither of the two) was
given to this genus, because its species could not be located in any
of the two genera of Jh)lii-/iopo(li(l/v, established at that time.

The known species belong to Europe, Northern Asia, North-
ern Africa, and North Ameri(;a. Of the latter I j^ossess un-
fortunately only fragments of specimens, so luat my statements
about them will necessarily be very imperfect.

1. 1?I. iiigl'ipt'^ LoEw. 9. — Nigricans, antenuis pedibusque concolori-
bus, tlionicis diinidio aiiteriore albido-bivittato, diruidio posteriore et
scntello all)ido-pollinosis, alis subliyalinis.

Blackisb, anteiiniB and feet of tbe same color, the anterior part of the
thorax with two wliitisti strijies, the posterior half and the scutellnm
covered witlt whitish dust, wings rather hyaline. Long, corp. 0.12.
Long. at. 0.12.

Syx. Mf'delents Hf'yr/yxs Loew, Neue Beitr. VIII, 73, 1.

I i'ilF-

MEPKTEHUS.

219

Blackish, witliont metallic lustre. Face opaque from brown
dust ; its ground-color seems to be greenish-black, below the trans-
verse swelling, above it of a purer black. I'alpi and prol)oscis
shining black. Antenna! ])lack. Front opa(|ue from brown dust.
The cilia of the inferior orbit pale. The anterior half of the ui)por
side of the thorax is brown with dust and has two distinct, yellow-
ish-white longitudinal stripes, which reach from the anterior mar-
gin as far as the impression upon the posterior half; this impres-
sion and the scutellum are covered with grayish-white dust. The
ui)])er part of the pleurae is covered with brownish-gray dust ; the
l)ristles above the fore coxa3 are black. Ab(h)meu black without
any distinct trace of dust. Coxie and feet black ; fore coxse very
glabrous, only with a few black bristles near the tij) ; the extreme
tip of the knees dark pitch-brown (which might be easily over-
looked). The second joint of the himl tarsi is three times the length
of the first one. Cilia of the teguhu whitish. Ilalteres whitish
with a darker peduncle. Wings hyaline, scarcely a little tinged
with gray, with dark-brown veins ; the i)osterior transverse vein
distant from the nuirgin of the wing somewhat more than its own
length ; the third longitudinal vein ends close before the tip of the
wing ; the last segment of the fourtii longitudiiud vein is uncom-
monly straight and its end lies close to the end of the third longi-
tudinal vein.

Hah. Middle States. (Osten-Sacken.)

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2. HI. veles Loew. % . — Nigricans, antennis concoloribus, facie opacd,,
pedibus testaceis, femorum diuiidio basali ex nigro piceo, alis subhyaliuis,
maris hypopygio atro, nitido, ovato, subsessili.

Blackish, aiitennre of tlie same color ; face opaque ; feet yellowish, basal
half of the femora brownish-black ; wings rather hyaline, hypopygium
black, ovate, almost sessile. Long. corp. 0.11. Long. al. 0.11.

S?N. Meileterus veles Loew, Neue Beitr. VIII, 73, 2.

Blackish, without metallic lustre. Face opaque from brownish-
gray dust ; its ground-color is black, more distiiu-t ujxm the part
below the transverse swelling, the dust there having been ruljbed
otf. Palpi and proboscis l>lack, shining. Antenme black. Front
opaque from brown-gray dust. The upper side of the thorax is
marked in a similar manner as in the preceding species, l)ut the
dust on the anterior half is more gray and that on the posterior
half and on the scutellum, at least in the described specimen, less

f

II

..■mUmhi-i

220

mPTEllA OP NOUTII AMKRICA.

[part II.

striking. The upper part of the pleiuje is covered with jrraydtist
aud the bristles ai)ove the fore coxa; are of a pale color. The
ahdoiuen is less thickly dusted tluui the thorax, appears however
rather j^ray in some directions on account of its cover of dust.
The peduncle of the hypopyg'ium is so short as to appear ses-
sile ; it is rather stout, ovate, almost reversed-pyriforni, hhick,
polished on its entire right side and on the latter half of the lefu
side. Coxie black. Feet brownish-yellow, all femora, from the
root as far as the middle, pitch-i "k, this color vanishing gradu-
ally. Cilia of the teguhe whitish ; halteres whitish with a darker
peduncle. Wings hyaline, scarcely tinged with a little gray,
veins brownish ; the posterior transverse vein distant from the
margin of the wing more than its own lengtli. The third longi-
tudinal vein ends a little farther from the ti}) of the wing than
in the ])reccding species ; the last segment of the fourth longi-
tudinal vein is also very straight, converges, however, less towards
the third longitudinal vein than in 31. nUjripes.

Hah. Florida. (Osten-Sacken.)

Observation. I have received from Mr. Lc Baron two females,
captured in Illinois. They are somewhat larger than the al)ove
described nmle, and the lower part of the face is greenish-blue, but
very little .shining. Otherwise they agree with it perfectly. The
ditferent color of the lower part of the face would be a sufficient
specific distinction, if the bad condition of the above descril)ed
male of M. velcs did not admit the supposition that the diiferencc
in its color is an unnatural one. I j)refer therefore not to consider
these females as belonging to a ditterent species.

Gen. XL. CHRYSOTIINEUS.

Characters. Size of the body small. Antenna? small ; their
first joint glabrous ; the third joint very short, usually broader
than long, distinctly hairy, with an apical or almost apical arista.
Eyes with a very short pubescence. The posterior end of the
thorax with a rather large, distinctly concave, sloping area.
The bristles upon thorax and scutellum yellow. Abdomen in all
the species partially yellow. Feet not elongated ; the first joint
of the hind tarsi without bristles. Posterior transverse vein up(m,
or more or less before, the middle of the wing ; the last segment
of the fourth longitudinal vein neither broken nor distinctly bent

\ Ll

CIIRYSOTIMUS.

221

forward, parallel to the tliutl vein ami endiiip: into, or somewhat
beyond, the tip of the wiii^. llypoinginm small and imbeilded.

The species of Chri/mdimus were formerly nailed with the
species of Chrijsolus. The principal dill'erenee between these
genera consists iu the structure of the thoracic dorsum. Cliri/-
sotiis has immediately before the scutellum a small, more or less
distinct, transverse swelling, which is separated from the rest of
the surface by a rounded imi»ressioii, and the convexity of the
thorax begins here. In Chri/sotimufi this transverse swelling is
entirely wanting, and the thorax shows iu the middle of its hind-
most part a rather conspicuous, distinctly concave surface, slop-
ing towards its posterior margin. Moreover in Chri/solinu(s the
feet are much less hairy, the wings comparatively a little larger,
tiie appendages of the hypopygium more concealed, the integu-
ments of the whole body softer, the bristles upon thorax and scu-
tellum not black, but yellow, and the abdomen always, at least
partially, of a yellow color, which is uot the case with any of the
genuine species of Chrysotus.

The name of the genus (from X9'v96i gold, and ti(iri, honor) re-
minds us of the coloring of the species, as well as of their former
connection with the genus ChnjaotKH.

Besides the two North American species, described below, only
European species are known.

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1. C pusio LoEW. 9 • — LfPte viridis, abdominis flavi segmento ultimo
viridi, anteunis palpisque nigris.

Bright green ; abdomen yellow, tlie last segment green ; antennae and
palpi black. Long. corp. 0.07. Long. al. 0.09.

Syn. Chrysotimns pusio LoEW, Neue Beitr. VIII, 74, 1.

Face dark-green with a thin white-grayish dust. Palpi brown-
ish-black, appearing rather pale on account of a white-grayish
dust, Antennaj entirely black ; front shining metallic-green ; the
frontal bristles black, in another direction fallow-brownish, with
a yellow lustre. The cilia of the whole orbit yellowish. Thorax
and scutellum pale metallic-green, with whitish dust, but shining
and fringed with yellow bristles. ^Nletatliorax and pleura; of the
same pale-green color, the latter with thick whitish dust. Abdo-
men uniformly yellow, only on the upper side of tlie last segment
green. All the coxaj and feet yellow, only the last joint of the

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DIPTEIIA (IF NdRTH AMEKICA.

[PAllT II

tnrsi ))ro\viiisli-bla('k ; all the liairs, as well as the few sliort bristles
upon tlicm, are yeUowish, th()U<^h the hitter aiipear dark when
hehl towards the liglit. Ilalteres and te^nihe yeUowish, the hitter
witli yeUowish ciUa, Wiii<rs hyaUne witii a yeUow-grayish tinge
and yelh)W veins ; the short and steej) posterior transverse vein
lies more closely to the axillary ineision than to the tip of the
wintr; its anterior end is not cpiite so far distant from the extreme
basis of the eosta as from the tip of the wing.
Hub. New York.

S< C. delicatllH Loew. 9- — li^to viridis, alxloininis segmentis se-
cundo et tertio fljivis, iinteiniis iiig"is, palpis flavis.

Bright green, the second .and third abdominal segments yellow, anteunse
black; palpi yellow. Long. corp. 0.08. Long. al. 0.10.

Syn. Chri/sotiiiiHs ileliciitiis Lokw, Neue Beitr. VIII, 74, 2.

Face blaekish-fjreen, covered with white-frrayish, not very strik-
ing, dust. Palpi ])ale-yellowish. Antenme I)laek. Front metal-
lic-green, indistinctly covered with whitish dust ; frontal bristles
black, in another direction fallow-brownish with yellow lustre,
The cilia of the orbit seem to be altogether yellow. Thorax
and scutellum pale metallie-green, with gray-whitish dust, l)iit
shining and fringed with yellow bristles. The metathorax and
the pleurae have a similar, but more dull, coloring; the latter are
covered with white-grayish dust. The first and the two last ali-
dominal segments are green and shining, the second and third, in
fresh specimens, are undoubtedly of a yellow color ; in the oidy
specimen, which I possess, both are infuscated t.o a consideralile
extent at their basis ; ui)on the posterior corners they show a
dusky-whitish color. The color of the venter cannot be distinctly
perceived, but it seems to correspond with that of the upper side.
Coxip and feet yellow, oidy the last joint of the tarsi lirownish-
black. All their hairs, as also their bristles, are yellowish, tlnuigh
the latter appear to be dark when held towards the light. 11 nl-
teres and tegula? yellowish, the latter with yellowish cilia. Wings
hyaline, tinged with grayish ; towards the anterior margin with a
yellow-grayish tinge ; the veins on the posterior j^art are more yel-
low-brownish, on the anterior part more yellow ; the short poste-
rior transverse vein has not such a steep position as in the pre-

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ci'ding species, and is a Utile more distant from the tip of the
wing.

llab. New York.

Gen. XLI. XAXTIIOC^IILORr^.

Characters. Color of the body non-metallic, yellow, often with
green spots. Antenna; very short ; their lirst joint renuirkal)ly
short and withont hairs, the second transvi'rse, the third very short ;
the arista, which is diietinctly clothed with hairs, is inserted upon
the back of the third joint, in the vicinity of the basis. The
thorax has upon its posleri<tr half an impressed area, which is
sloping downwards. The last segment of the fourth longitudinal
vein is but very gently inflected, and converges somewhat towards
the third longitudinal vein; the si.\th longitndiiuil vein disappears
already far before the nnirgin of the wing. Feet rather long;
hind tarsi much shorter than the hind tibiiu ; their lirst joint with-
out bristles and shorter than the second. Abdomen of the male
not elongated ; the hypopygium rather swollen, not imbedded,
pointing straight liackwards, so that the abdonwu thereby apjH'ars
to be somewhat elongated; the appendages are small, but (li.-<-
tinetly visible. The abdomen of the femah; obtuse at tin tip,
somewhat impressed below, and without a coronet of bristles.

In consecpience of the color of the body, the species o{' Xaii/ho-
chl'irioi might perhaps be mistaken for species of the genera ( 'hnj-
solimux and Saiirrofus In C/iri/xolinuif^ the position of the arista
is more subapical ; the third and fourth longitudinal veins are
parallel, the feet shorter, and the hind tarsi almost as long as the
hind tibiic. the liypoi)ygi'.!m of the nmle is sandier and imbedded,
and the last segment of the fenuile al)doineii ])rotrudes in the form
of a short ovipositor. Of all this, nolJiing is to l)e found in Xan-
tJiochloriix. In Saitci'opus the alxlomen is elongated, the hypopy-
gium iidlected under the abdomen and the last alid(mnmil segment
of the feiiude is a sort of an ovi})ositor; all this is n(»t to be found
in X(iiilliocIili)7'itt< : the feet of the species of Saiicrojuiti are also
much more elongated than those of the species of X(nilIi()rhlorHs.

The name of this genus (from Sai^oj, yellow, and x^^i'oi, green)
has reference to the peculiar color of the species.

Besides a few European siieeies, only the following North

, r.

224

T)II'TKUA OK NORTH AMKIUCA.

[part II.

American sitocics is kiidwii, w liicli may jaTliaps bo iili-nliful with
one of the Kuropeuii speeies.

1. \. Ii(>l villus LoEw.

iiiL;i'io.-iiitil)U.s.

9. — riftvus, fronto, facio et setis thoracis

YtiUow, fiont, faco ami the bristles of the thorax bhickish. Long. corp.
(Ml. Long. al. 0. IM.

Syn. ^aiit/Kichloriin lielfiiim LoKW, Noue Ikltr. VII, 75, 1.

Altctfjctlier yelh)\v. FrDiit and faco hiackisli witli whitisli dust,
winch is moro distinctly visiltlo in an ()l»li(|no direction. Tlie
arista, the bristles on tlie vortex and on tlie upper side of tlio
tiiorax. black, lait shifting? into lirown in a rellcctcd li^ht. A
snndl l)lackisli spot en the pleunu, immediately below the root of
the winj^.

Jldh. Chicago.

Olm'rcatio)). — This species resembles the Europoan A', frnrlhi)^
AVied., very much, and Is probalily a slijiht variety of it. Xo
])histie distinctions at all are to be seen ; the only dill'crencc which
I can perceive, is the darker color of the l)ristles upon the vtitix
and on the upper side of the thorax. The comparison of the male
is necessary in order to determine whether this species can be con-
sidered as a variety of X. lenellus.

I: i *i ll'-'.; ■'• ■

t-'

■ 1.%

i.'

Gen. XLIL SAUCROPrS.

The species of this gcnns, which older authors have united with
Porphyropa, agree in many characters so much, and differ by
these characters so sharply from the related s])oeies of the Doli-
chopodklfe, that their claim to form a se))arate genus cannot be
questioned. The following are the principal characters of this
gemiK : First joint of the antenna} without hair on the upper side ;
arista dorsal. The thorax with a sloping area upon the mid-
dle of its posterior end. Feet very long and slender ; hind tibiic
elongated ; the first joint of the hind tarsi without bristles, shorter
than the second. Abdomen elongated and narrow ; especially in
the male. Hypopygiuni disengaged, short and stout, indoctod,
with short, very little developed appendages. Color of the body
principally, or ut least partially, yellow. Kairs and bristles
chiefly black.

s.Mri'.di'i'H. 2'2.i

TIh' cliiii'iii'tcrs l»_v wliirli the ;;'(iiiis S(i iicrnpiis is flisliiifi'iiislicd
IVdiii llic rclnU'd jiTiici'ii, nwA iutt lie rcpcntctl licrr, it,-, they liiivc
iilrcinly lt(M'ii sulli('ii'iitly fxplaiiu'd iiiiinn^' tin' cliiinirtcrs dt' tliuM'
u I'll era.

'I'lic unww'iA' J^inici'it/itii^ (from navxiio,-, (li-liciitt', mnl «'»r<. \'nn\)
liiis rt rfiTiUM' to the HTciit slciitlcriicss of llii- H'l-I, wliicli (li>tiii.
jiiiislics nil llir s|H'CU's ol'lliis ^iciius.

Tlic kiiDUii sjM'cics lift' (listrilnit('(| over Jjii'dpc, Aiiii'ri<'H, iiiid
Sdiitli AlVica. 'I'lic Aiiicricaii s|M'ri('s rcsciiildc iiidrc tlidsc of
I'lui-dltc tliaii tlidso df Sdiilli Africa; in tiic laltrr llio lliinl and
fdui'tii !dn<:,-itiidinal veins an- )iai'idl( I. while in the I-]iii'd|ii'an
sjieeies the last sejrmenl of the fdiirth ldni:iliidinal vein a]»prdae!es
the third Idnjiitudinul vein, allhuugh vi'r\ gradually, still, in gene-
ral, very strdngly.

]. S. (lilllidiatim Lni-.w ^. — P;illiil(< tl.ivus, tlinracis liiuu iiifdiii ct
inaculit iKKstiiii iiii/iis, aliiloiaint) iii>,'r(ita!-(.'ial<>, setis coxaruiu auterimani
alhiilis.

I'alc-yt'llow. tliorax witli a Mnck iiiiddln line aiiil with a Mack sjidt apon
tilt' iiosteriiir cnil, aliiloint'ii with lilack liaii'is ; tlic anterior cdXii' witli
whitisli liristli'S. Long. <'ori>. OA^, Long. at. (•.17.

pv.N. Sinicriij)iiii ilimiiliithis Lim'.w, Ncnc Heitr. VIM. 7.'), 1.

Pale-yelldwish. Face very naiTdw, white. Antenna' bright-
yelldw. Front black with white dust ; frontal bristles lilack.
(.'ilia on the posterior orliit as well as the two stronger Ijristles
liehind tlie upper corners of the eyes, yellow-whitish. Fjnier side
t)f the thorax reddish-ycllow ; th middle line and the sloping
area oil its posterior margin are i)lack. Sciitelliim wliitish-yellow
with two strong lilack bristles; on the outside of each of these
lirislles tliere is a very small delicate hair, easily overlooked, which
in all our Fiiropeau species is luuch stronger. Metatliora.x black ;
the pleura' have a snudi Iihick dot above the middle coxse. Abdo-
men with three lilack transverse bands, the first in the vicinity of
the basis of the second segment, the two following near the basis
of the third and fourth segments; the two last are somewhat
emarginated on the middle df their jxisteridr margin. Jlypojiy-
gium short and clumsy, shining black ; its small (\xterior appen-
dages are while. Coxa- and feet )iale-yclldwish ; on the fore and
middle coxje there are altogether no black, but only whitish liris-
15

U-'.i

I

:

^

00(

rtll'TKHA (IF NdllTll AMl.lMl'A.

[

I'Aiir 11.

llt's ; tlif liiiirs dii tlic IVunt side of tlic lure cuxii' arc iilsd wluti>li ;
(III \hv (Hit>i(l(' of tlic hind coxiu tlicfc is a .solitary It'luck l)^i^li(',
Tiltiu" and tarsi t'loii^iilcd and vcrv slender; middle and liiiid tarsi
stronj^ly inriiscated I'roni tlie tip of the first Joint; the fore tarsi
from till' tip of tlie lirst joint hecoine likewise more dark, though
their color changes much more fi-radually into lirown. Cilia of the
teji'iilii' whitish. Win;ji:s hyaline with a sliji'lit }i'ray-yellowish tiiiu'e ;
the end of the fourth lunj^iludinal vein approaciies rather strongly
tlie end of the third.

Jl(il). Florida, Uistriet of Columbia. (Osteii-Saekeii.)

*2, H. riltielllis Lokw, 9.— P.-illi.le tl.ivna, thoracis iiiaful4 pcistlc-i,
iibildiiiinis tiisuii.s st^tis(iue coxitiuiii niuiis.

Pal(j-yt'll()W ; therax witli n Mack sjiot iiikhi tli(* posterior siile ; aliilotneu

with Ithick bands; uoxie witli lilatk luistles
al. Ii.t23.

I.on

rj). U.2ri. Li

Sy.n.

•iaiicriijiw

riihrlhis Lokw, Neue Beitr. VIIL 7<i, 2.

I'al

e-vellowisii.

ace narrow, white

Ant

eiiiiic oriy

low.

Front lilack with white-yellowish dust. MMie IVoiital li, and

the two stronger bristles hehiiid the ui)per corners of the eves,
liinck. Cilia of the orliit yellowish-white. Upper side of tin.;
thora.x reddish-yellow, the slo)>ing an>a on its hind margin lilack.
Sciitelliim yellowish with two sli'oiig black liristles ; on the outside
of each there is a very niiiinte delicate hair, easily overlooked.
Metatliorax brown only on the upper margin and upon the mid-
dle line. Pleura' witli a lilack dot above the middle eo.xa'. Al»-
domeii wilh four black transverse bands of uniform breadth, of
which tlie lirst near the anterior margin of tlio second segment,
llie others on the anterior nuirgiiis of tlie following segments; the
last of these bands is sometimes indistinct. Coxa; and feet pale-
yollowish. The bristles on the fore coxa' black ; the hair 011 the
front side blackish, towards the liasis of the coxie pale ; middle
coxa' with black bristles and hairs : the hind coxa» on their out-
side with a single lilack bristle. Tibiu' and tarsi elongated, very
,sleiidcr ; the tarsi from the ti[> of t!ie lirst joint infuscated. The
cilia of the tegula' yellowish. AViiigs with a very distinct gray-
yellow tinge ; the end of the fourth longitudiiial vein rather strtnigly
api»roaches the end of the third one.
JJab. Virginia. (Osteii-.'-iackeii. )

rmv

SAI iltiil'l S.

4>.)

-'7

3. H. siigiprltirilH ].<>r.w. % and 9. — Kx planro vlrMis, nliilomii).)
lii'li" it'iifd , iriili, lii^iiii vt'isim lljivn.

(irayisli-gn't'ii, tin- aliiliiiiifii s-liininc inctallii'-^'rffii, tovvanls tlm lia^is
yellow. liOii),'. imp. (M;;—n. 14. |,c.iiu'. al. iM.'i.

f^v.N. Siiiiirii/ius si(})i rliints Lmiw, NtMic I'-fitr. VIII, 7t!, IJ.

Fare of llic intilo t'litircly linciir; llmt uf tlic I'ciiiiilc iilsn very
narrow, smnv-wliitc. I'ulpi and iiroboscisdark-ycllnw. Anirmiii!
brij!;lit r('<l(lisli-yi'll(»w ; tlic siiiiill third joint soincwlint inriisciitcd
at the lip. Frr)nt witli thick wliitisli dust; the IVontuI Itristlcs
bhick. The <'iliii of tlic iippci" orbit black, those of the iiilcral
uiid inferior orbits wliitish. The upper side of the thorax lias a
pale, inetallic-jirecM ^^round-color, more copper-colored townrds
the sides, appears, however, on account of the thick ffray-whitish
dust, opaipio and frhiueous. Scutelluni more Idue-jfreen, but al>o
rather thickly covered with j:'ray-whilisii dust ; it has two stroni^
l)lack bristles. 'I'he pleura", wliicii are covered witli thick white
dust, Iiave a grayish-jjreen <i-r(Hiii(|-co|or, only their posterior mar-
gin (cjiimera iiu'tnlhonti-is) is of a yellow color. Abd(»men some-
what less eloiifrated tlian in the ]»rccedinir species; its first sc^-.
ment yollow, usually witli a blackish spot on each side, wlii( li
e.\i)ands more in some specimens, so that llie u'reater portion of
tiiis segment is of a lihickish color ; the second sciiineiit is also
yellow, lias however on each side a hiru'c, brij:lit, nictallic-fi-reeu
spot, which reaches from the jiostcrior almost to the anterior mar-
gin and not u!ifre(|ueiitly comes in contact with the opposite spot
and forms a complete Itand, so that the antei'ior margin of this
segment alone remains yellow. The following segments are on
their whole upper side of a very saturate tnetallic-grecn coloring
and very shining; towards the lateral margin the color <iften
changes more into gold-green, rarely into coppery. \'eiit('r yel-
low. The small rotinded hy]M)])ygium of the male yellow. All
the coxu^ and the long slender feet pale-yellow ; the stronger hairs
and bristles on the fore <'oXie are fallowish-yellow in the males,
black-ljrown in the fenndes ; the more delicate hairs are pale-yel-
lowish in both sexes. Tibia' and tarsi very elongated, especially
the fore and middle tarsi of the male, t!ie first .joint of which is
almost as long as the tiliia^ and considerably longer than the four
following joints together; in the fennde, however, the fore and
middle tarsi are less elyiigated, especially their first joint, thongli

i

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liiS

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i

4;

228

DIPTFRA OF XORTII AMERICA.

[I'AUT H,

they oxpocfl tlio tibia? m length not inconsiderably; the hind tarsi
are but a little l()ii<j:('r than the til)i;e, their lirst joint not miieh
longer than the second. The tiidie iin<l tarsi of the hiud feet are
sparsely beset with very short bristles, which, in the fenuile, dis-
tinctly d'Her from the usual short hairs, in the inale however
scarcely exhibit any diflerence. The cilia of the whitish teguUe
ajipear in some directions dark-brown, in others shift into yellow-
ish. Wings hyaline, little tinged with grayish; the veins bi'own-
ish ; the long last segment of the fourth longitudinal vein is' gently
inflected forward and cuds rather closely near the cud of the third
longitudinal vein.

Hab. Florida. (Ostcn-Sackeu.)

4. S. tenuis, nov. ■'p. 9 • — iJibite flavescens, fronte, thoracis dorso
prreter liml)OM laterale.s pcatellocjue pneter niarginem ex cincivo viivs-
centibus, pleurarum diniidio snperiore (-t metanoto ex glauco ciiieieis,
fasciis basalibus s«>gmentorum abdoniinalium nigris.

Pale-yellowish, the front, the back of the thorax, with the exception of the
lateral margins, and the sciitelUini with the exception of its ni;.:gin,
gray-greenish ; the upper half of the plenrae and the metathorax ereen-
ish-gray ; al)doniinal see? .ents at the basis with black bauds. Long.
Corp. 0.13. Long, al- 0.1 .

Pale-yellowish ; the face, very narrow for a female, and the
palpi have the same color ; both are somewhat covered with whitish
(lust. iVntennire pale-yellowish, the third joint somewhat infus-
catcd. The ground-color of the front is greenish, metallic but
not shining, covered with rather thick white dust, so that the
■whole front assumes a pale grayish-green appearance. The
greater part of the ui)per side of the thorax has a similar, but
somewhat more green coloring ; however, the humeral region, and
in connection with it, a large lateral spot near the transverse
suture, the lateral margin above the root of the wing and the
posterior corners are of a yellowish color. Scutellum grayish-
green with yellowish nmrgiu. Almost the whole upper half of
the plcuric is greeni:di-gra\, yet tlie color of the described speci-
men IS not sufliciently matured for a more i)rccise statement about
the e.\tcnt of this color ; the metathorax is gray. The first al)-
dominal segment is blackish at its basis ; the three following
segments have each on the anterior margin a broad, black baud,
which is gradually tapering towards the lateral margin. Feet

I'siLoins.

2'20

palo-yi'llow ; tavsi tDwai'ds tlie tip only vory little dnrkor. but their
small last joint more of less distinetly infuseated, esi)eeially that of
the fore tarsi. Cilia of the te-rnhe whitish, llalteres white-yel-
lowish ; their kiiol) infuseated on its lower half. Win<i's hyaline,
only a little tinu'ed with n-rayish ; the last seti'nieiit of the fourth
longitudinal vein is only very ucntly inlleeted forward from its
middle, is in <j:eneral somewhat, distant frum the third longitudinal
vein, and approaehes it, esjieeially at its end, le.ss closely than is
the ease in the ]»reeediiig hpeeies.
IlaO. Middle iStiites.

Gen. XLin. PSILOPl'S.

The crenns r.<ilopt(!< ean be easily distinti'uished from the re-
lated g-enera by its jieeuliar slender structure, the slenderness of
its feet, the broad and e.xeavated vertex and the peculiar neuralion
of its winji's. The ))eculiarity of the neuralion consists, besides tht!
great i»roximity of the p(jsterior transverse vein to the inarg-in of
the wiuiT, es])ecially in the structure of the fourth lonj;itudinal
vein; this vein either d(jes not reach the margin of the wing at
all, or becomes extremelv thin liefore it reaches it ; at the same
time it emits anteriorly a robust branch, which bends forward
either in a smooth or in an angular curve ami ends in the neigh-
borhood of the third longitudinal vein into the margin of the
wing; strictly speaking, this anterior 'iranch is the real continua-
tion of the fourth longitudinal vein; its apparent continuation
Ijeyond the origin of this Ijranch is an adventitious apitendage ;
and that such is really the case, is ]>roved by those exotic si)ecies,
where this ap[)eudage is entirely wanting.

The species of J'Kilojiiifi exhibit in the structure of the head
and of its i)arts, es|)ecially in the anteniue, as also in the structure
of the feet, of the wings, and of the male organs of co})ulation,
numerous plastic diU'ereiiccs, which may easily mislead to the for-
mation <'f snndler genera. The greater ])arl of these characters are
merely ornaments of the males and exclusively specific distinctions,
so as to l)e of little use I'iir the delinition of smaller genera ; this
apjilies even to the most striking among the other characters, as,
fi)r ii'staucc, to the e.'ilii'r dorsal or apical position of the arista,
the either very s!'i)rt or very long iiulteseence of the second Joint
of the antenmu ^v. ; lliese also all'urd no sharp limits, and there

'i^M

.1;

• \|v^

i'':

■■■■,■(.'

■(. t

, ■:

I ' -.1

,1 ! >

i!:s

• !/ •H.jt.-

'■■■n^y.

i:iO

DIPTKUA OF NOUTII AMKllICA.

[part U.

are species, whoro the two sexes do not ajj-ree in tliose eliuraeters.
Mr. l)i<i'()t divided tlie genus P.^ilojnia into the fnllowing- twelve
sniuller genera : JIc(jif<lvf<lijluf!. Mesuhlepltarua, A(jonosoinu, Mar-
(jarilvfilijlus, Oarit<lijtiis, Vundijlotilijl an, J'Juro.f/ona'rus, y'o.sw/y/.</-
lojiux, JIi'tcrujt^ilopUH, FxiltipuK, SciajiUff, and CLdijxiilujnift. In
aceordanee with what 1 have said above, 1 cannot adopt these
genera, based in part upon dillerences in the orntiinentation oftlie
feet in the male, and upon otlier distinctions of a similar value.
If the genus I^silojiux is to be furtlu'r subdivided, this divisi<tn
will have to be based ujion the observation, that tlu; species of
l^fiilojiiiff diverge in two directions in their general habitus; one
of these two sections end)raees all otir European sj)ecies, and a
number of similar species, nujstly from Norihern Asia and North
America, the other section includes the large majority of the e.xtra-
Kiiropean species. If these two branches are to l)e raised to in-
dependent genera, then such characters must be found, which can
distinctly separate then» from each other. There i.s m> want of
plastic distinctions, winch may be used for such a purpose, but
they are so manifold and of such an intricate nature that I believe
to have found a more useful nunk of distinction in the color of the
cilia of the teguhe, which in all the species of the first branch
known to me are whitish, in those of the second branch however
black. These characters have been used by me merely for the
establishment of the two subsections of the genus Pxilopm^.

Although the species of Pxi/opn,^ are so numerous and appa-
rently resendjie each otlier so much, nevertheless they can be
easily distinguished, if only the necessary attention is paid to the
])lastic difl'erences and not nierely to the diff'erences in color,
which are often insignillcant and more or less inconstant in ahnost
all the spooies. The nniles of the diflerent species especially can
be easily distinguished, as they are remarkable by peculiarities
in the structure of their antenna', wings and feet, which belong to
their se.\ only ; they offer, besides, usefid marks of distinction in the
anal appendages ; among the fenndes of the smaller species, how-
ever, the distinction becomes sometimes rather diflicult. Of the
characters taken from the cohiring, the most, unrelialile are those
taken from the coloring of the head, thora.x, and alMlomen, espe-
cially in those species, the metallic coloring of which is shifting-
between the bine and the green ; a little nn)re available are tli(?
characters bused upon the picture of the wings, if only we do not

^<§^;

^■WP^Wifi^^nB^"' ' F"*'*^* ■•-

rsii.oiM s.

231

neglect to observe that this ])!eture, at least in ninny species,
varies a great deal not only in intensity, bnl also in extent ; nse-
fiil and rather reliai)le are the characters based npon the coloring
of the feet, bnt of course then only, when the sex is stated, as in a
good many species the leet of the remalos are much paler than
those of the nniles.

The genus derives its name (from 41X05, slender, and noii. foot)
from the great slenderness of the feet, peculiar to all the species.

The species of J'silujui.i are numerously represented in all jtarts
of the world.

Huy has described several North American species of Puilopns.
"Wiedemann has adiled a few nnjre. His descriptions, even if
judged with leniencv, will be fouiul verv nnsatisfactorv, as thev
relate merely to diU'orences In color, and often do not even state
to what se.\ the s)»ecinien belonged; some of them can be applied
to whole series of closely allied species. Mr. .Mac(iuarl's anil Mr.
Walker's descriptions are not much Itet.ei ; those especially which
the hitter published in the Diplera Suiitidcn<i<tiia are remarkable
for their entire uselessness, so far that one may be .sure not t(i find
in them precisely those data which are indi>peiisal)le fi>r the re-
cognition of the species of Psilopus and for their di.-5tinction from
each other.

The insufficiency of the existing de.scri|»tions renders the ileter-
miiuition of the species very dillicult ; generally we reach oidy
possibilities, sometimes probabilities, very .seldom certainly. As
I am able to identify oidy a snnill number of my species with
those which have been des(M'ii)ed before, I deem it necessary to
give here the results obtained from the comparison of the species
in my possession with the descriptions of the jtrevious authors,
and for this purpose I shall eiuimerate these descriptiiiiis one
after the other.

The species heretofore published are the follow'i>g: —

If,..,,

li ■■;"

'5 •■ .

I;

■ f \

l 4;:

1. longicornis Fnhr. Irnliponous to the .Aniorioan i .lands ; it has been
rles(:ril)eii hy Faliriciiis, ainl afterwai'ils ai.'aj:. liy Wii^iU'iiianii, from
a spcciiiit'ii ill tliH colhMUioii of l'iii)ri(:ius ; the sex was not stateil,
hut I'"alirifiii .'s exj)i'ession '^nniilii iinriii'itn." sl^iw^i tiiat it was a
male : ill til,. (li-MTiptioii (if Wii'ij.Miiaiin tin' lulhiwiiii: avaiialile clia-
racters r.re fouiul : tlie fac-e only little dusted with white, tin' hasis
of the ahdoiiiiii.'ti seuiiients hla(rk, wiiitrs without dark |i:cturi', li.J
teres yellow, fuel black, fore tibia? luluoua. These charaulens agreo

.1

)-'V

"i mi

r 1-

Vim
Mi

J,

"♦1

PIPTKUA OF NORTH AMKRICA.

[I'Airr It.

tolernMy well with tlu' two sexes of a speoies from Cuba, desfrihcil
lielow as /'. iliri/^ojinisiii-i, alllnm!.'h the tart! of the male of this s]it'-
fies is distinctly covered with dii>t and the lialleres are lilai'ki.-U
with a dark yellowish-gray knob, lint it evidently results fiom the
statements of Fabrieius, that his /'. huKiivoniix belongs to those sjie-
eies, the arista of whitdi is very elongated and but little shorter than
the rest of the body. In /'. cliri/sd/irdsinK, on the coutrary, the arista
is not even as long as head and thorax together. Thus the latter
species must be considered distinct from that of Fabricius, as long
as their identity has not been proved by the comparison of typical
specimens. In Winthem's collection there is a male specimen,
marked /'. loiKjicurnis, and designated as Wiedemann's tyjie ; it is
7*. (7i(v/.so;(;v(,s//(,s-. As Wiedemann, in the description of /'. lom/i-
rornis, refers only to the specimen from the collection of Fabricius,
it is eviilent that Winthem's specimen came only later in the jios-
session of Wiedemann, and was i)robably named by him /', lniKji-
cornis, after comparison with his own descrijition. This is no proof
at all of the identity of the genuine /'. hini/ifoniis Fabr. with /*.
chn/soiii-(isii(s. The specimen in the collection of Fabricius can alone
afford light upon this subject.

2. sipho Sii;/. The frequent occurrence of tlio species described below

under tins name, and the characters which result from a compari-
son of Say's and Wiedemann's descrij>tions, leave ine no doubt
about the correctness of my determination. That Say did not dis-
tinguish it from /'. scdlxr, a very closely related, but more rare
species, results from the fact that there are two speciiuens in Wiede-
mann's collection, namely, a male of P. scalier, and another of /'.
sijilin, both communicated under tlie latter name by Say himself.
The name which Say has given belongs naturally to the common
species. The species whicli Macquart (in Difit. ejot. II, '1, Hi))
described as P. si/ilio, is an entirely dill'erent species, probably the
one whidi I described below as P. JhcuikIiis, from Cuba; however,
it may also represent a mixture of several species, as the localities
of its occurrence (l^euusylvania, Cuba, (tuyana and Brazil) seem to
indicate.

3. unifasciatus ■'^'t;/. Say describes this species without stating tlie sex,

Wiedemann as P Sni/i, after a male specimen, obtained from Say.
As there is no sufficient ground for the change in the name of the
species, introduced by Wiedemann, the name given by Say must be
restored. 'J'his species cert'dnly belongs to tliose with pale-colored
cilia of the tegnlje. I know tliree North American species wbich
answer more or less Say's description with regard to the color of the
body ; in all three only the tirst joints of the antennje are yellowish,
the third joint, liowever, brown ; thus all three could not lie iden-
tified with P. iini/'dsriiitun Say, if his statement, ^^nntenntK irhili-lt,''''
were to be taken literally, which certainly oui^ht not to be done.

< IP ■:. •

psiLor-rs.

2.'!;J

The first of my three species is described below as P. psiihiviina ;
the male is remarkable by a very uncommon structure of tlie wio'^'s ;
as Wiedemann's descrijition of the male says nothing aliout such a
structure ; umreover, as neither the dust upon the face, nor tin- color
of the first abdominal segment, nor that of tlie feet agrees with the
male of P. jisilldi-iiiKs, it is therefore impossible to identify it witli
Say's species. Of /'. hholor, described below, and distinguisbi-d by
its slender tarsi, I know only the female; it is very nnuh smaller
than /'. inii/dsciiiliis slionld be, according to Say's and Wiedemann's
statements; moreover, the wings are not light-yellowisl;, tlieir veins,
liowever, daik-brown, tlie face covered with more dust, and the tarsi
mnch paler than they sliould be in the species of Say ; tiierefore
both cannot be taken for one and the same. The third of my spe-
cies, P. varicijatus, of wliich, however, I possess also only the female,
has tarsi of a darker color than the two pieceding species, though
tlie fore tarsi are not altogether and the liind tarsi not only at the
tip, black-brownish ; on the contrary, the fore and middle tarsi are
blackish from the extreme tip of the first joint, the bind tarsi, liow-
ever, entirely blackish with the only exception of tlu; root of the
first joint; moreover, tlie face is very tliickly covered with dust, the
color of the wings not yellowish, and tlie color of the veins of the
wings not dark-brown, so tliat it would be entirely inadmis-iible to
declare this species for P. uni/nsria/iin of Say, which therefore can-
not be found among tbt; species known to me. Neither is tliere any
inform.ation about it to be derived from Wiedemann-Winthem's
collection; there is no specimen in it which bears such a name, nor
is there ^ny other to which the description of P. uiii/asciatus might
apply.

4. patibulatus Say. Say's description agrees well with a species wliich

is very common in North America, similar to s////io, but with black
feet and smaller; it is described .lelow more in detail un<ler Say's
name. Wiedemann's description is but a translation of Say's de-
scription of this species, which he seems not to have possessed liim-
self.

5. femorat;uB Say. Judging from Say's description we refer this species

into the circle of relationship of /'. scohiiidtnr, cnlcaratus, kc. That
this is correct, is confirmed by a statement of Say, which otherwise
would have been ratlier striking. While he describes (Jmirn. Acml.
Philad. Ill, Bt!, f)) the femora as green, and, with the exception of
the hind ones, provided with a pale tip, he sjieaks (1. c. VI, l(i8,
11) of one specimen with entirely pale femora. Now the males of
all the species, which belong to the above-mentioned group, have
the femora of precisely the same color as Say first descibed them,
while the females have entirely pale femora. The sf/ecies, which
belong here, are distinguished in the male sex by sorn • jieculiarities
in the structure of the feet ; as Say's description does '>ot mention

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234

DIPTEHA OF N'ttRTII AINIF.RICA.

[PAUT II.

tlu'in, it is impoHsilde to determine which of the compptiiii,' spHcies ho
li;i(l 1)1- lore him. Wii'deiaanu'.s tie.-iuriptionufthuMiiiiie species ull'ord.s
no liglit ; lie does not ;tate tlie sex of tlie described speeiiiieii, hut it
is evident from his statemenis alxiiit tlie color of the feet, that it
was a male. If this male specimen were still in his collection,
which iiiil'oituiiately is not the case, the species, which lie obtained
from >t\y as I'.J'nudnHits, could be easily jletermined. Coi..,idering
the great similarity of the species belonging to this group, this
would by far not settle the (piestion, whether Say liad described as
P. fimiiriitiis one of these spe(;ies, or whether he liad mixed it up
with others. I regret to say that in Wiedemann's collection there
are, under the name of J', fimuridiis, only two females, which, judg-
ing by the pins, came from Jjay ; one of these females i believe to be
J'. SI I'liiiKitor, the other J', ctiudatitlu.i • nsidering, however, the
great dilliculiies attending the distinction of the females of this
groui), I cannot render a positive decision. Thus P./'cmorntns o(
Hay, as a species, will have to remain unnoticed, as it cannot be
determined with certainty.

6. pallens W'iii/. This species i; easily recognizable as one of those in

my possession. Wiedema'iu furnishes only the description of the
male ; in the following I communicate tlie description of both sexes.

7. macula W'ii'd. This is a species entirely unknown to me, and remark-

able by the unusual picture of the wings,
fci. diflusus W'ied. In ^V'iedemann's collection there are two totally dif-
ferent males under this name. That whicdi bears the etiijuette is
remarkable by the more diluted, as if diffused, picture of the wings,
so that it may be supposed that Wiedemann had this specimen par-
ticularly or exclusively in view when he described and named this
species. I accept this specimen without hesitation as the genuine
P. </i(/'u^us Wied. Upon its etitiuette the evidently incorrect state-
ment of its patria, "Savannah," is crossed out and changed by
Wiedemann himself into "Rio .Janeiro." The other male, placed
alongside of the etiquette, is that of /'. Jnruiidus, common in Cuba
as well as ill lirazil. In Winthenrs collection a male and a female
named /'. </;//«M/.s are found. The male is the same as the typical
male in Wiedemann's collection. The female, which is alongside
of it, agrees very well in mmiy characters with P. (Hjfuaits J, , shows
however a few differei.ces, such as should not be expected from a
female of /'. ilijfitsiis. For the outlines of the picture on the wings
are not only better defined, but the blackening on the fore margin
beiiins only beyond the end of the first longituilinal vein, while in
the iiiait^ it begins already before it ; besides, the bristles on the fore
and niiddle tibim are very much longer than in the male of J\ ilif-
f'li^ii.-i. I siiould not take this female for tliat of /'. ilijl'iisus, if I had
not reieived a iiumbi'r of jirecisely similar specimens from Hra/.il,
as beiiig the females of a male belonging to P (lij/'iisn.s. For these

rslLOl'LS.

9;i

o.)

rp.a.aons T have no doulit tlwit this is the genuine ft-maK" of /'. <l{l'~
I'll US. Tlio siifciuicns of my collcflion show tliiit tim (liHt'ieiice in
tlu! fxtfut of tht) liliick I'ohiriug on tiin loit; iiiiiritlu of tiic wings in
both Sfxi's is not always so cousiiit'ialilo as tin- [lair in Wintheni's
colii'ction sliows it. If tiiiMi, in aiconlanro witli llns Ion-going, tho
easily locognizalilo male of /'. ilijiums is to he sliiikcii ont from tho
list of North Ameiican speeies, I will nevi'itheh'ss ill^e^t licie a more
accui'ato description of this sjieeies, which has heen only insutli-
cieiitly chaiacteii^etl by Wiedemann.

P, difB'llsils WiEn. % and 9- — Viridis, nitidissinius, f.isclis nigri-
cantilms alarum duabus, valde <littlueiitihus, antlce eoniuiictis ft jios-
tice ahl)roviatis, facie nudil, pedihiis nigris, tibiis tar.-isiiue anlicorum
teslaceis, setis tibiarum antern>rum perlongis, halteribus nigris.

^. Luolius ullimis tarsorum interuK^diorum articulis postice caudido-
pilosis, appendiuibus hypopygii m.ijusuulis, fuscis.

0 . Tibiis tarsisijue interuiediis piceis.

Green, very shining; both blackish bands of the wings very ditliised, but
united in front, abbreviate<l behind; face without hairs; ftet black,
tibia? and tarsi of the fore feet brownish-yellow ; bristles of the four an-
terior tibiae very long; halteres black.

'J, . The two last joints of the middht tarsi with snow-white hairs on the
posterior side; the rather long appendages of the hypopygium blackish-
brown.

9. Middle tibiie and middie tarsi pitch-brown. Long. corp. 0.22 — 0.23.
Long. al. 0.24— 0.2;').

Syx. Psllo]>iis (i:j/'iisiis WiRO., Auss. Zweifl. II, 221, 17.

Metallic-green, brij^lit, i^hiiiinu'. The lower part of the face,
the posterior corne's of the tiiorux and the sculelluin (in one of
tho males) steel-bluh The very nuich cxcuvated front Ix'set, he-
sides til'' usiui! ?>; 'ck J)ristles, in tiie male with lon<>'('r, in the
female with somowiat shorter and more sparse hairs, which are,
on the mid(,!e of the front of a whitish, on the sides of a more
l)lackish, in the male even of an ainnjst black color. The rather
broad face is "•lal)rous and only very sparsely dusted, its lower
part rather distinctly separated from the upper part and the latter
rather coiive.v. Antennie black, rather siindl, the second joint
with rather Ions; l)lack bristles ; the arista is of more than middlinir
Icno'tli, aiul has a sidtapical position. Palpi hlack, with nnmerous
black hairs ; prol)oscis brown-idack. 'i'lie iiristles of the thorax
and the four l)ristles of the scutellum are l)li!ck, and rather lonu-.
I'lemu' with white dust. The green color of the ubdouieu changes

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236

DII'TERA OP NORTH AMKIIICA.

[I'AItT If.

jrnuliiiilly upon the posterior segments into frojdon-grocii, iiiid llio
Inst sr^iiR'iit is usimlly entirely, or lit leas, piirtiiiljy, of a stccl-
liliR' color. Ill till' iiiale tlicn,' is, near tiio basis ui' lacli of the
al)(loiuiiiaI scuinciits, u narrow, l)ut distinct liiaclv I»aiid ; in tlic
female these hiack bands are still narnnver and less strikinj;-. 'i'jie
l)lack hair upon the ulidoineii and the black bristles before the;
)>osterior nnirjiin of each of the seiiinents are of considerable
leiiffth. The hypopyji'iiini is ratln.'r small, its appendajjes are not
snrticiently well ]>reserve(' in the described nude specimens, to re-
cofj^nize their structure accurately; I perceive oidy that IIkt are
of middling lenji'th, rather broad, of a dusky brown, and at the tip
of a more black color. Co.xie black, ccnered with a thin whitish
dust ; the anterior co.xje with comparatively lonj; white hairs and
towards the tip with a few black bristles. Femora black, on the
under side with lonj^ erect hairs, which are white near the basis
and black at the tip, and are much loiifrer in the nude than in the
fcnuile. Fore tibiae and fore tarsi brownish-yellow, the latter
blackened near the extreme tip ; the fore tibiie have on the upper
side a row of five or six very lonji; black bristles, which is inter-
rupted lon<!^ before its et'd, and of which the last one is the lon<rest
and somewhat longer in the female than in the nmle ; I ])erceivo
in the nuile on the under side of the fore tibia3, in the neighb(ir-
liood of the root, a rather long, ))tit very fine bristle; in the female
this bristle is much shorter, and besides, there are two small bris-
tles inserted at e(pu\l distances. The fore tarsi in both se.xes are
slender and of a plain structure ; in the male a little over one and
a half, in the female one and a half the length of the tibia ; they
are beset only with the usual black short hair, nevertheless, in the
female, there are on the under side of its very elongated first joint
four very short bristles, inserted at e(pial distances and wanting
in the male. Middle tibine and middle tarsi black in the described
nude ; dark piteh-brown in the female ; the middle tibiic have, lie-
sides the bristles at the tip, four black bristles on the upper side,
which are rather long in the male, but still longer in the female ;
on their under side there is in the nude only one long black bris-
tle, which is very near the root ; in the female there are on tlio
under side, besides the bristles at the tip, three bristles of conside-
ral)le length, of which that which is nearest to the root is also the
longest. The nuddle tarsi are of moderate length, beset oidy with
the usual black hairs, though there are in both sexes on the under

I'S 1 1,(1 PL'S.

23T

siile of tlic very flonpati'd first joint a few small, vorv sliort liris-
tlt's ; iiKti'i'ovt'r ill the iiiiiic liii' two last joints, upon tlu'ir postt'iior
sido, are liesct with siiort, l»iit doiise, siiow-wiiiii- liair. Hind lil)iii;
and hind tarsi lilack or l)rown-l)hi('iv ; the usual lilack liuir ii|Mia
tlio former is rather long, esjK'cialiy on tiie inside in the iieighiior-
liood of the basis ; on the outside is a ntw t»f hiaek ))ristles, whieli
reaches from the basis as far as tiie middle. Hind tarsi not strctiiji-,
niueh shorter than the til)ia', the lirst joint longer tiiiin the follow-
ing ones taken together. Tt-guhe with a l)laek margin and with
black (ilia; the lialleres in both sexes bnjwn-black. Wings gray-
ish h\ aline, with the usual two Itlackish transverse bands, which
are very extended and dilfuse.l, and as they unite again upon the
fouvtii longitudinal vein, they enclose an almost square, not sharply
defined, hyaline spot, in the first cell of the posterior margin; the
(lark coloring begins in the male on the anterior margin of the
wing, already before the end of the lirst longitudinal vein, in the
friiiale somewhat beyond it. and extends in all specimens as far as
the end of the third longitudinal vein. The posterior transverse
vein, which is long and but little iiiilected, lias a very obli((uo
jiosition; the anterior l)raiicli of the fourth longitudinal vein forms
with it an angle of scarcely sixty degrees, and turns afterwards at
a very much rounded right angle towards the tip of the wing.
llab. Brazil.

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9. guttula Wied. Of tliis species tliere is a well-preserved pair in Wiede-
uiann's and another in Wintliein's collection. Wiedemann's state-
ment tliat this specMes is from Savannah, is a mistake, corrected hj'
himself, and rejihiced on the etiipiette by " Rio .Janeiro." In Win-
tliem's collection also, Brazil is mentioned as the locality. There-
fore this species must be stricken out from the list of North American
species. As Wiedemann's description is not sufficient, I give a more
accurate one as follows : —

I

P. gllttula Wied. % and J .- )l)scure feneo-viridis, rapite, scntello
et thorace postico intei.lum violaceis, abdomiiie cupreo, in ajii(;e viola-
ceo, in basi plernmipie viridi, fai-ie nuda, pedibns simplicibus, ol)scuris,
alarum fisciis duabus nigris valde dilatatis, antice eonjunctis et postice
abbreviatis, in vena longitudinal! quarts contluentibus, ita ut gnttam
hyalinam majusculam includaiit.

%. Tibiis oliscure piceis, halteribus ex fusco nigris, abdoraine nigro-faa-
ciato, appendicibus hypopygii minuti parvis, nigricaiitilms.

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,238

IHl'TKIlA (»F NOIITII AMKHU'A.

[

I'Aur II.

9. Tiliiin ex flaro tewtnceis, halteiiliUM Huvis, abilotnine Hulioh^aolnti- iiinro-
t'lisuiiiti),

Diirk br()iiz('-cre»'ii, liiviil, Hciitclhun and liirnl part of the thorax pomftitm-s
violet; ali<l<)iiifii coiipcry, at tin- tiji violnt, at th») basis usually >.'rt'i'n ;
face glalirous, feet jiiaiii tiiid dark colored ; the two broad black baiMlsi
on tlie willy's art- united in front and shortened behind: on tlie fomtit
hmgitudinal vein tliey again run toHetiiur, so as to enclose u rather lar^ti
hyaline drop.

^ . Tibia- dark pitch brown, lialteres brown-black ; abdomen with black
bands; the small hytK)|)ygium with small black appendages.

9. TibifB yellow-brownish ; halteres yellow; abdonnMi with but rather
indistinct black bands. Long. corp. O.IH — 0.22. Long. al. l».17 — (M!».

Sy.n. /'sihi/iiiK </iiHula WiE»KMA.NN, Auss. Zweifl. II, 222, 18.

Of modoratoly hrifjlit, (lark-metallic color, wliicli scorns to bo
cliioHy ^rooM on head at 1 thora.x ; on tlio abdonioii ))riiici|tully
copjiery and violet. Jfcad sliiniiijr frrooii, rarely sliiniiifr Idack-
frreoii, llioiigli the front is always stool-lilin! or violet ; on tlie vor-
te.\, besides the usual bristles, it is also beset with I)laek hairs.
The face is not very broad, without hair, and o.\hil)its but a sjifi'lit
trace of whitish dust. Antennie iiiack, of moderate size ; the i)ris-
tlc.s of the second Joint not very loiijr. Palpi blnek, beset with a
few stilf l)Iack hairs ; ])roboscis brown-black. Thorn.x dark ir.^^'tal-
lii uTcen, usually on the lateral inarji'in and s(»nu,'times 011 the
\vh(de posterior half of a violet color. The bristles of the thora.x
and the four bristles of the jrreeii or violet scutellnm are bliick ;
pleune <rreen, on the posterior inar<rin more black, everywhere
<'()vered with white dust. Abdomen towards the tip, especially
ii! the mide, very ]>ointed ; its color is usually cliicdy coppery, c.t
the ti]) always violet, near llic basis often a-reeii ; sometimes tli(!
violet color extends almost over the whole abdomen, but even then
the posterior margins of the fore and middle abdominal scu-menis
remain of a coppery color In the male each of the abdoiiiiniil
scfrinents has near the basis abroad, but not sharply delined bhick
]>and ; there ire also traces of them in the female. The black hair
on the abibmien and the black Itristles before the posterior inarLiin
of each seirment are but of middliufr leufi-th. The extremely sniiill
hy])opy<rium is black ; its short ap])endafres are blackish. Coxa'
black with thin white dust, the foremost ones with white hair and
in tlie vicinity of the tip with a few black bristles. Femora black,
on the under side with rather loufr erect white little hairs, inter.

i'siLoi'ia

SOU

pporscd now niid then with a lifllr- liliick Imir. Til)iir nf the inalu
hrowii, iiftir the root l)hi(-k-l)niwii ; the iiiiddio til>ia- uii thi.> out-
Hide witii a re^iilur row of i)hli*|iiely inserted Iduek l)l'i^llt's ; uii tlie
outside of the fore til)iu; there is u low iif five or «i.\ Idark Ijristies,
which does nut reacli as fur as the lip ; the hind tiSiu' are witlimit
ln'isties. Tihiiu of the female yellow, near the foot liritwn ; the
fore and middle tibitu with a few sparse bristles; the hind tiiiije,
ns in the male, without bristles. Tarsi l)laek-i)rown, those of tho
female less dark than those of the male, in both Hexes plain ; tho
foro tnrsi of the male are about 1^ the lenjrth of the til)iu', ilieif
first joint is alxmt H the len|;th of th<' followinjr j(»iiits tntrether,
and beset upnn the middle of the ontside with two black bristles;
its middle tnrsi are not (juite ]}, the rnjrih of the tibia-, their tir>t
joint is more than U the Ien;rth of all the jther joints tojrether,
and beset with a few black bristles; its hind tarsi are somewhat
stout, shorter than the hind tii)ije, and their first joint not iiiiich
lonf^er than all the others tofrether. The fore and middle tarsi jf
the female are somewhat shorter than those of the male, a!id their
first joint is much less eloiifrated ; its hind tarsi are more slen<ler
than tiiose of the mah'. Tho teii'uhe have a l)lack mar<rin, and are
frinjred with loiiir black cilia. The halteres of the male are brown-
i)lack, lh »se of the female yellow. Win^^s hyaline with the usual
two black bands, united on the anterior mar^nn and alilireviated
Itefore the posterior marfrin ; they expand in a rather unusual
manner, and coale.sec nj^ain upon the fourth lon^'itudinal vein, so
as to enclose a lar;j:e drop in the first cell of the ])osterior maru'in ;
on the anterior mar<rin the darker colorintr botrins rather far licfore
the end of the first htnjritudinal vein, and does not reach to the cikI
of the third vein; the anterior branch of the fourth lonii'itudimd
vein forms an acute anjrie with it and turns then at a somewhat
rounded anti'le of about eiy-hty dei>-rees towards the lip of the
wiiifi, pursuiuL'' this course in a rather straiirht line; the posttrior
transverse vein is ,-lraijrht, has, howin'cr, a somewhat obliipie
position.

Huh. Rio Janeiro. (Coll. Wied. and Winth.)

10. caudatus ]Vir(l. Wiedcm.itin's statenn'iits sppm to ]irnvc 1 pyoml
doubt, that this species l)el(iiii:s to tlie ri-l.-itiimship of /'. .-<■■ I imif'/r ;
among the species of this kiml I know Imt one wliicli, lik.- cnmlniiis^
is distinguished by tlie extraiirdinary length of the hairs at tlie e.x-

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240

DIl'TKKA HK NoItTir AMi:i!I('A.

[I'AIIT II.

trt'iiii' tip of tlu' mull' nliil>itinMi ; this spinier*, which I have ciiII'mI
J', riniiliiiii/it'i, (lilt'crs, hoHi'Vcr, fVoiii /'. niiiilnlii.s by its siiiiillcr si/.o
too milch, to lie iiiirtlakcii tor it. In WiiMh-niniiii-Wiiitht'in's colleo-
tion no inrorinittioii whatever is to lie t'ouinl ai>oiit /'. iinnluhm, \\\
tlie Herlili Muselllil thent is ii Hpeciiiiell of/'. imiKihis, nxuU'r the
liaiiie of /'. riiiiiliiiiis ; I eauiiot, howtn'er, nckiiowledge the correct-
iiess of this ih'tei'iiiiiiation, as Wieih'iiiatin (li-tiiii'tiy says that tliH
feinahf of liis /'. riniilnhis has no hlaek femora, likii the male, hut
yellow ones, vliile this is not the case with /'. cnniiitiis. Tho typical
Hpeiimeii of /*. eiiiiitnhis is in Westerinann's collection.

11. virgo Willi. The description of a female, which also seems to helong

to the circle of relation^'hip of /'. srnhluiitiir. The statements which
Wiedemann gives aliont it are so uncertain, that no conclusion as
to the species to whiidi tho described specimen heIoni,'ed can Im
drawn from them. The size, as stated by Wiedemann, is uiortf con-
siderable than the size of the females of all the npecies of this rela-
tionship that are known to me. The typical sin-cimeii is not to ho
found in Wiedemann's collection, so that a satisfactory solution as
to this sj)ecies is iirobably never to be expected.

12. mundus Wii'd. Of this species there are two males in Winthem's

collection, tnarked as Wiedemaini's types. Had I known them be-
fore I published the Kighth Cart of the " Neue Heitiili^e," I should
not have ventured to describe in that volume /'. ri/inhis as a species
dill'erent from /'. miiiiilu:i. Certainly both specimens in Winthem's
collection are very much smaller than the male, which was the tyj)e
of my description of P. cilin'ii.i, and their coloring is darker and
more distinctly violet; but in all the plastic characters tliero is
much similitude betwe-n them and tho male, which I have de-
scribed. The only pi ■ ic dill'erence, whicii I can discover, is the
followiiii;; in P. 7niiiiili(s theio is, besides the row of bristle.>( on tho
outside of the fore tibia;, also a second row, placed further towards
the inside, and which is tolerably complete ; in /'■ ciliattis this
second row is also present, but it is as complete as in /'. mididus
only in the vicinity of the root of the tibi.-p, further on it is (appa-
rently) more incomplete; however, no accurate judgment can bo
based on a single specimen, and moreover the difference is so trilling,
when compared to tlie great conformity in the extraordinary struc-
ture of the wings and of the fore tarsi, that too nundi stress is not
to be laid upon it. As tlie name " riliatns'^ has already been be-
stowed upon this species, I may be permitted to retain it, until the
identity of the species, so named, with /'. miiiKlus has been more
positively established. A separate description of the latter is unne-
cessary, as no mistake can occur if a proper attention is paid to the
description of P. cilialiis, as well as to what has just been said
about these species.
1?'. radians Mmq, First described in the " Suites i Buffon ,-" the same

I'SU.dlMS.

241

ilKscriptioii irt fmiiid in the hijitlnn fxatiiiiifH II, 2, 122, only in tint
latter it is riiiiil "Jiimlifn I'osi'KHiKUlii;.-' «< inh rmiiliniii s Jiiuudivi s," iii'*
ntfiul «( " JdiitlirM A.S'i i:mKi'i;i:s (7 iiili nnriliiilrin Juuiiiiiri .■•." Tliat tliit*
is nii'i'fly fi nii.si>riiit, is (U-idciit t'loni uiiHt Mr. Maeiiuart hiivs in
/h'jii. cjriit. //, 2, 1-li, at tilt) top (if tliH jxik't'. All tlin iliaiaitiTrt
btated liy Mr. Mau(jiuut am also those of J', lo.i;/ironiin Fiibr., 80
th.1t Mactiuart's species cannot he distinguislieil from it.

14. portoricensis Mn'ij. A very inroniplete description of a fcniale (irst
j^iveii in till) '• Siiltts i) Jiiiif'iiii," and then repeated in the /tijil'''n^
/•.niiitiiics, J/, '2, 121. Mr. .Ma(:c|iiart au'ain mentions this sjH-cies in
J)/))!, (.ml, Siijiiil. I, l:ii>, and furnisheH there a llgiire of tiie wing
(tail, xi, tlic. 17). Tlie only (diaraeter eontained in the description
nnd which may leail at once to the recognitiun of this spei'ies, is the
puhu.scencu at the hasis of the arista ; another character of this kind
may perhaps he found in Macipiart's llgure of the winir, where tini
anterior hranch of the fourth longitudinal vein is closely ajiproxi-
mated to the margin of the wing. I know of no siiecies possessing
these charactei's.

1.'). sipho Mocij. I have already remarked that the species, whidi Mr.
Macqiiart has described under this name, is (juite ililt'enMit from tlio
genuine siphu Say, and prohahly identical with /'. jiiciiin/iis, with
whicli it will liave to ho united as a synonym.

10. incisuralis Mmij. Tlio description {JJijil. ixut. Suj)/!!. I, 120) has
heeii drawn from a female ; in an observation, however, Mr. Mac-
quart declares that )io possesses a male belonging to this female;
the characters, however, wliicli ho furnishes render it very doubtful
that they belong togetlier. I tliereforo take into account the de-
scription of the female only. It belongs to the group of sjiecies
which resemble by the picture of their wings /'. ilij/'iisus, .sh/k rhu-t,
&c., but does not seem to bo identical with any of these si)ecies ; it
lias also some resemblance with a female in my collection, from
Brazil, whicli Wiedemann himself liad deterniine<l as /'. iinltuhi,
but which, nevertheless, does not belong to this sjiecies ; however
the band on the wing is much broader and connected with the spot
near the tip of the wing not only at tlie anterior margin, as it is in
the other sjiecies, but also upon the fourth longitudinal vein.
Therefore iiin'surtilis seems to be an unknown, but independent
species.

17. delicatus ]\'((lk-. A female, evidently belonging to the si)eci«s with

pale cilia of the tegulic. None of the species, known to mo, com-
bines pale-iolored two first joints of the antenme with a green-colored
abdomen, except /'.jili/n's Lw. ; this species, however, has a whitish
and therefore very striking pubescence of the abdomen, llonce
(k'lii'dtiis Walk, is not among the species known to me.

18. gemmifer Wall:. Tlie specimen described is a male. In the descrip-

tion no dill'ereuce can be discovered between it and sipho Say, so
16

(■■

■ii

M '■ ■

242

PIPTKHA OF NOUTII AMKRICA.

[PAKT ir.

tliat we are induced to take it for a specimen of the Icatter witli ;i
but little (U'velojied i)icture of tlie wings, unless much ptresn is laid
upon the circunistance, tliat Wallier calls the api)enilages of the
hypopygiiMu *(l(tih jiitvhy" wliile t-liey are of a ln^wn-black color,
even in specimens tlie color of wliich is lut little developed.

in. chrysoprasi Wnlh. Described without statement of tlie sex. Tlio
descri[)ti()u agrees tolerably well wiJi a species from Cub/i, only the
statement about the color of the feet does not agree entirely.
Nevertheless I believe it to be the species of Walker; I hnvi; de-
scribed it below with the necessary cliange of its name in /'. dir/jxn-
])r(.'sli:s.

20. Buavium Walk: Described without stating the sex, evidently a spe-
cies with black feet, which belongs to the relati(Uiship of {i(ililiul(itH<t
Say ; the description contains no characters wliich would assist in
determining this species.

'M. amatus Walk. Male and female. The remarkable statement, that
the abdominal segments of the male have black bands on their jios-
terior margin, agrees with no species known to me, and jnoliably
with no species of /'silopin^ whatever, because the black abdominal
bands, apparent in so many species, are alwaj-s found on the ante-
rior margin of the segments. Mr. Walker means, j)erhaps, the nar-
row margins on the po^■,terior border of t'ach segment, which, when
seen in a certain light, have a black appearance ; or he nia^- have
simi)ly made a mistake in stating "posterior margin" instead of
"anterior margin." Besides this doubtful statement, all the rest
agrees so well witli specimens of jiiililnildlits, with faded outlines of
t' ■'. picture of the wings, that aiiKitits Walk, must be taken for a
synonym of this species, until more satisfactory marks of distinc-
tion to separate it from patlhithihitt are found.

22. inficitus 11'"/^-. Mr. Walker makes no statenn^nt about the sex of

the sj)eeimen ; as however in the group to whicli this species belongs,
the haltercs of the males are usually blactk, and those of the females
are usually yellow, we may conclude that it was a male. This
being admitted, its description contains no character whereby injj-
vilia (vnild be distinguislied from dark-colored males of jintihuldiiis,
and the'i'fore it must be pi. ceii at i)i'esent among its synonyms.

23. nigrofemoratus Walk. Described without statement of the sex,

probably after a male related to scuhimttnr. One variety, B, is said
lobe distinguished by the tip of the femora and the whol(> tibia?
being yellow. It is easy to perceive that this is no variety, but a
dillerent spiicies, aii ^ probably the male of ?H(r/«/.s-, which will be
described further below. As in this species the tijjs of the fore and
middle femora oidy are yellow, therefore the femora of iiiiirnj) iimni-
tits Walk., in conformity with its description, must be of an entirely
dark color; thus niifrnfintoratus cannot be mistaken neitlier for
scubiiKitor, nor calcaralus, nor cdtulatut:, the femora of wlucli are jire-

PSILOPl'S.

24.}

cisely of the same color as those of incriiilr:. I (iannot therefore ;e-
coi^iii/.e this species of Walker in any of the si>et;ies known to nie.

24. albicoxa Walk. Male and female. Of the HjKnies known to nie,

only P. sriiitillinis apjiroaches tliis species. Walker says of his
sjieciea tliat tlie fore and middle tarsi are hiack only at the tip, the
hind tarsi, however, entirely lilaek with the exception of tln^ lust
joint. In my species all the tarsi are of a uniform color, namely,
yellow near the root, hnt from the tip of the first joint black-lirown.
I cannot therefore^ take uriiilillniis for Walker's (illiicorn, and the
men! so, as Walker's description contains no statements about any
plastic distin(dions, which might servo as a clue to determination,
wliiln sciii/ilhiiis j)ossesses so remarkable and so striking plastic
cliar,'u;ters.

25. lepidus ]\'it//,: The described male seems to belong to a species very

nearly related to jintiliuldtus, or to be this very species. After
Walki'i''s dcscripf ion nothing more can be said abinit it.
2(1. ungulivena W'ullc. The description agrees with none of the species
known to me.

27. solidiis Ma//.-. The description of the female of a species with en-

tirely black feet, from the r(;lationship of jKitiliiilaiux, which seems
to he distinguished from all similar species by a more robust struc-
tur(! of the body. Tin; description, however, contains nothing which
would make it possible to determine this s]>ecies with more cer-
tainty.

28. peractus Wall. A female from the relationship of /'. Imniiroruls and

chiysfijiritsiiis. The characters stated are insullicient for its deter-
mination.

20. haereticus W'lll. A female from the relationship of the ])rcceding
species and similar to it, also described in a very unsatisfactory
manner.

30. permodicus U'allc. The male of a species remarkabb? by the slen-
derness of its body, an<l which Mr. Walker attemjjts to describe in
three lines and a half. I know of uo species to which his descrip-
tion might be r('f<>rred.

"in,

Tints, the scanty result of tlio iiKpiinVs att('nii)t('(l on tlio ])ro-
vioiisly pultlislicd tliirty .Xoctl) Anicriciiii species is tlic lolluwiii^' :
Two species, (UjI'iikk.^ VVicd. nit^J (jatluld Wicd., must bo stricken
out from the list of Nortli American species. Of the other species
1 recognize live anioii<>' those in my possession, nanu'ly, aiplio Say,
patV ulahix Say, y^r/Z/c/j.s Wied.. and ('■/(/v/.s'o/y/Y/.s/ Walk. ; the lirst
throe are reproduced liolow ninlcr th<' same nnnics, the last one as
chri/Kopra.-iiiis. There is a species which, very pr()l)al)ly, is the
same with ono doscribod by mo as now, nanioly, mundut^ Wicd.

Pi

i ,.

m\

244

DIPTERA OF NORTH AMERICA.

[part II.

with ciliatus. Five species have to be recorded as ■.ynonyins )f
others; tliesc are radians Macq., as a synonym of longicoi'm's
Fab., sipho ^lacq. (jf juvundus Ijoew, gemmij'ei' Wall<. of sijiho
Say, amalus Wiillv. of iiatibulalus Say, aud inficilus AVallior,
likewise oi palibulutus Say.

Table for the determination of tlie Species.

2

15

3

S

6

10
11

12
13

( Tegulfc witli black cilia.

* Teguhe with pale cilia.

( Wings with a <larkf r picture.

( Wings without picture.

' Wings black, hyaline only at the tip and the hind margin.

1 dimidiatns Lie.
Wings hyaline, with two black fjisciiB connected on the anterior mar-
gin. 4
I Feet of the ^ predominantly yellow. 5
( Feet of the % predominantly black. 6
First joint of tlje middle tarsi of the % with a few ordinary bristles
upon the anterior side. 2 sipho >Si///.
First joint of the middle tarsi of the % closely ciliated with short
erect bristles on the anterior side. 3 scaber /.«•.
I Face hairy, 4 patibulatus >«//•
( Face without hairs. 7

{Feet in both sexes entirely black. 5 melampus /.»•.

Feet in both sexes not entirely black. 8

Middle tibise and lirst joint of the middl'j tarsi of the % ciliated on
the upper side. C pilosns /,«'.

Middle tibiip and first joint of the middle tarsi not ciliated on tlie
upper side in the % . 7 jucundus /.n:

First longitudinal vein much prolonged beyond the middle of tlie
wing. 8 ciliatus /."•.

First longitudinal vein reaching at the utmost as far as the middle of
the wing. 10

t Arista extremely elongated, apparently apical. 9 comatus /.«'.

( Arista not very elongated, distinctly dorsal. 11

( Fore tibiaj >f the ^ , fore and middle tibi;e of the 9 » yellow.
I 1<" chrysoprasins Wa/L:

( All tibife of the % , in the 9 'I'so the femora, yellow. 12

f The first joint of the middle tarsi of the ^ beset with crooked bris-
] ties. V.i

' The first joint of the middle tarsi of the % plain. 14

Tip of the abdomen of the ^ with moderately long hairs.

11 scobinator JTm.
Tip of the abdomen of the '^ with exceedingly long hairs.

12 caudatulus Lw.

PS1L0PU8.

245

14

15

M

20 1

Middle tibire of the % with strikingly long spurs. 13 calcaratus /w.
Middle tibi;e of the ^ without long spurs. 14 inermis Lw,

Antennse entirely black. 15 scintillans Lw.

Two first joints of the antennae yellowish. 16

Fore femora without thorn-like bristles upon the under side. 17

Fore femora with yellowish thorn-like bristles upon the underside. 20

Atidomen at the basis not yellow.

Abdomen at the basis yellow [not metallic].

Tarsi for the most part, black.

Tarsi but little infuscated towards the tip.

Ail the coxse entirely yellow.

Mi'M'e coxa; gray with yellow tip.

AU 1 ■ cox;e entirely yellow.

Midd-rf and hind coxai blackish.

l(j pallens Wied.

18

17 variegatua Lw.

19

18 bicolor Lw.

19 psittacinus Lie,

20 tener J.w.

21 filipes Lw.

Systematic arramjement of the Species.
I. Tegulie with black cilia.

A. Wings with a dark picture.

A. Wings lilack, only the tip and the hind margin hyaline.

1. dimidiatus L.n:

B. Wings hyaline with two fascise connected at the anterior mar-

gin.

2. sipho Sin/.

3. scaber Lw.

4. patibulatus Say.

5. melampus Lio.

6. pilosus Lw.

7. jucunduB Lie.

B. Wings without dark picture.

A. First longitjidinal vein reaching far beyond the middle of the

wii

8. ciliatua L.w.

B. First longitudinal vein reaching at the utmost but to the mid-

dle of the wing.

1. Arista apparently apical and remarkably elongated.

9. comatus Lw.

2. Arista distinctly dorsal and not remarkably elongated.

a. In the % only the fore tibire, in the 9 also the middle

tilii.''' vf'llow.

10. cbryBopraBtus Walk.

i. In the '^ all tibinn, in the 9 ^'^o ^^^ femora, yellow.
M. Bcobinator r.n: 13. calcaratus I^w.

1-. caudatulus Lw. 14. inermis Lw.

^'

!»

'', M^'

'; J.

24G

DIPTERA OF NORTH AMERICA.

[part II.

II. Tegulae with pale cilia.

A. Anteniije entirely black.

15. Bcintillans Lw.

B. Tlie two first joints of the antennae pale.

A. Fore femora in both sexes, or at least in the % , without yellow

thorn-like bristles upon the under side.

1. Abdomen at the basis not yellow.
10. palleus Wied.

2. Abdomen at the basis yellow, not metallic.

a. Tarsi for the most part black.

17. variegatUB Lw.

b. Tarsi towards the end but little infuscated.

a. All the coxffi entirely yellow.

18. bicolor Lw,

B. Middle coxa gray with yellow tip.
1''. psittaicinuB L2u.

B. Fore femora in both sexes with yellow thorn-like bristles upon

the under side.

1. All the coxjE entirely yellow.

20. tener J.w.

2. Middle and hind coxse blackish.

21. iilipes Lw.

Mn

Description of the Species.
I. TeGI L.E CILIATED WITH BLACK.

A. Wings with a black picture.

A. Wings black, only the tip and the hind margin hyaline.

1. P. (liniidiatus Lokw. ■^ .— Nitidissimus, capite thoraceque vio-
lacelrt, abdoniine viridi ; pedes simplices, graciles, femoribus nigris, tibiis
fltivis, tarsis fuscis ; alae ex fusco nigrffi, trieute apicali et margine pos-
tico hyallnis.

Very shining ; head and thorax purplish-blue, abdomen green ; feet plain
and slender with Mack femora, yellow tibia; and brown tarsi ; wings
brownish-black, the last third and the hind margin hyaline. Long.
eorp. 0.17. huna,. al. 0.19.

Syn. IVdopns dimidiatus LoEW, Berl. Ent. Zeitschr. VI, 216, 70.

psiLorus.

247

Head purplis]i-l)luc ; the front has, besklcs the ordinary black
Jjristk's, no ituhcsci'iu'e ; the naked face is rather densely covered
with whitish dust. The small antennui are black ; their second
j(»int is beset with only a few short lu'istles ; the arista is of
medium size only and has a dorsal position. Proboscis, brownish-
yellow ; palpi, blackish-brown. The coloring of the thorax is
puri)lish-blue, shining, but changes ui)on its posterior lialf into
steel-blue, and before the s-utellum even into a bluish-green.
Scutellum greenish-blue. Pleurie black with a greenish reflec-
tion, dusted with white. Abdomen metallic-green, shining ; the
bristles of the single segments before the hind margin are but of
medium length. The hypoi)ygium is small ; the form and color-
ing of its appendages cannot be distinguished with certainty in
the described specimen, still the si^e of the appendages seems to
be but small. Coxie brownish-black, dusted with white, the fore-
most with minute whitish hairs and bristles. The slender, rather
glabrous femora are browni.sh-black, but at the extreme tip, yel-
low ; the yellow tibiiE are slender, beset with very short black
hairs, which are somewhat more erect on the middle libi*. Tarsi
plain, slender, brown, somewhat more brownish-yellow towards
the basis ; the four anterior ones are much longer than the tibiie,
and their first joint much longer than the four following joints
taken together ; the hind ones are hardly of the same length with
the tibia), but their first joint is likewise perceptibly longer than
the four following joints taken together. Teguhe l)ordered and
ciliated with black. AVings brownish-ltlack, the last third, the
hind margin, and the greatest part of the anal angle grayish-
hyaline ; the fore margin of the wing is fringed, almost ciliated
with comparatively long, minute hairs ; the hind transverse vein
has a very oblique position.

Hah. Mexico. (Collect. Winthem.)

B. Wings hyaline with two l)lack bands connected on the .anterior margin.

2. P. sipllO Say. % and 9. — Chalyheus vel viridis, rarius aureo-
viridis, nitidissiniiis, alarum fasciis dualius nigricantilius, aiitice con-
junctis et po.stii-e. abhroviatis, facie nuda, pedibus iu iitroijiie sexu tlavis,
maris metatarsis interniediis non ciliatis.

Steel-blue or green, seldom golden-green, very shining ; wings with two
l)lMi:kish bands, connected in front and abl)reviated behind ; face with-
out liairs ; feet yellow in both sexes ; the tirst joint of the middle tarsi of
tlie ^ not ciliated. Long. corp. 0.121— U.:24. Long. al. t).li2— 0.'.24.

1 ' '.' " t

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':i.i'^if^:'|-

248

DIPTKHA OF NOKTir AMKIUCA.

[part n.

Syn. DnUcfiopifi si'jihn Say. Journ. Ac. Pliilad. Ill, S4, 1.
Psi/o/)tis sijilio WiKDKMA.N.N, Aiisirt. ZweiH. II, 218, 9.
Psilo/ms (jcmmifir Walkku, List, III, t)4G.
Psiliipiis sipho LoEW, Neue Beitr. VIII, 83, 1.

Saturate green, often bluish-green, steel or even purplish-hluo,
seldom gokl-green, always very shining. Faee without hairs, its
ui)i)er part but little convex and separated from the lower part by
a shallow impression. Proboscis brownish-yellow. Antennte
black ; the pubescence of the second joint only of moderate
length; third joint rounded; arista distinctly dorsal; not par-
ticularly long. Abdomen with black transverse fascia; on the
fore margin of the segments, which are so narrow in the j, tliiit
they arc entirely concealed beneath the hind margin of the pre-
vious segment ; in the J* the hind segments of the abdomen are
often gold-green; the same is sometimes also the casein the 9,
where this gold-green color sometimes also reaches the anterior
segments of the abdomen. The pubescence of the abdomen is
generally black; in the male it is whitish upon the first segment,
on the basis of the second and of the third segments, and on the
anterior half of the lateral margin ; in tiie 9 , the pubescence of
which is in general shorter, minute whitish hairs arc to be found
only upon the hrst segment and on the anterior part of the lateral
margin, which hairs are less perceptible than in the (-f . The black
bristles before the hind margin of the segments of the abdomen arc
only of a moderate length. Ilypopygium small, black ; lamelhc
small, black or brownish-black, ciliated Avith black. Fore coxie
yellowish, with a delicate white pubescence and a few black bristles
near their tip. Middle and hind co.Tic, including the trochanter,
dark. Feet yellowish ; all the femora are beset with delicate,
minute whitish hairs upon the under side, which are distinctly longer
in the J* than in the 9 ; the fore femora have a row of four to five
black bristles upon the hind side ; on the middle and hind femora a
few thorn-like minute black hairs are to be found upon the hind side,
as well as uv)on the anterior side before the tip. Fore tibite entirely
yellow ; in both sexes, three snmll bristles are generally to be found
upon the upper side ; and whilst there Jire likewise but three upon
their outside in the 9 , in the (^ , about six much longer biiotles are
usually extant. The fore tarsi are yellow at the basis, but be-
come black already before the end of the first joint ; in the ^^ iiwy

rsiLopus.

240

ni'( once and a liulf llic l('ii;.r;li of llic tibiir, in tlic j only iiI)out
once and a third; tlicir lii>t joint is very elun<;'at('(l, so liiat it is
much lonjiXT than tho rcnniininji' joints tal<cn to<i'cthcr; Ix'sidcs llio
usual short pulK'sccncc, wliich is nincli lon^'cr upon tlic hind side in
tlio ^ tiuin in the 9, it has a few small hlack Uristlcs u)»on tlic under
side. .Middle tihiso in tho 9 with l»ut a few hiack liristles nj)on
the ni)iier and front side ; in the J* besides with a row of erect
bristles inserted almost on the under side and running; from the
base to the tip. Middle tiirsi of the same coloring;' as tho foro
tarsi, still Iho black colorinu' Ix'u'ns tr'cnerally somewhat earlier in
tho J* ; thoy are about once and a half the length of the tiltia' ;
the first joint alone is not nun-li shorter than the tibia and nearly
l.V the length of the f(dluwinp^ joints taken together; beside tho
usual minute hairs, it has upon tho under side about seven short
black ])ristles, upon tho anterior side one or two somewhat longer
ones; tho middle tarsi of the 9 are of the same structure, but some-
what shorter, and the small bristles on their first joint are snndlor.
Hind tibiai at the e.xtromo tip black, wit'li the ordinary pubescence,
upon tho outside with three or four bristles; hind tarsi shorter
than the hind tibiio, entirely black, the lirst joint once and a half
the length of all the following taken together, which are of a gra-
dually decreasing length. The small teguhe with Jilack border and
with long black cilia, llalteres yellowish ; the liasis of the ix'duncle
blackish. Wings hyaline ; costa with the usual short pul)escence ;
the black picture not very extended ; the two blackish bands
have no connection Ijchind the fourth longitudinal vein ; the lirst
band is not seldom interrupted immediately before the fourth
longitudinal vein, and the second is never e.xtendod as far as the
ai)e.\'. Hind transverse vein moderately obliipie, somewhat
sinnated ; tho basis of the anterior branch t)f the fourth longitu-
dinal vein is nearly twice nearer to tin; nuirgin of tho wing than
tho hind transverse vein. This branch has, at its origin, a some-
what recurrent direction, and turns from there towards tln^ mar-
gin at a right angle, which is rounded at the tii»; it reacln's the
margin somewhat l)efore the apex in the innnediatc proxinuty of
tho tip of the third longitudinal vein.

Hah. Pennsylvania, Georgia, Virginia, Illinois, etc.

Ohxrrvalion 1. — I possess a ^ , which is distinguished fmiii all
others, tho row of bristles, peculiar to tho sex, upon the lower
part of tho front side of the middle tibiaj being nmch closer, and

ijh

' I ■ •!

'■%

2r)0

]>Jl'Ti;ilA dl" NOllTII AMKlUl'A.

[part ir.

Ix'iiijr hIso proloiifjcd over the lirst Joint oC llio larsi, wlicro tlio
brislk's are iiiucli sliorti-r, and tlicrc arc altout ten Itrislk-s in all.
As, in otiior r('sj)(.'cts, this specimen anTces itcrlcctly with iho
others, and as llio row of bristles in (|ne>tion seems liable to vary
as to its closeness, 1 take this sin'cimen Ibr a variety of P. kiji/io.

OhKervation '2. — It has already been noticed above, that the
sjiecies described as J\ si/i/io by Mactjuart, is not synonynions
with the present one. Walker, in the Lisl of Dipt., lias also u
]'. sipho, but as he (piotes Mac(piarl's J\ t<ip/i() unionj:; the .syno-
nyms, anil as his own J', (/rmiiti/'cr seems to l)o nothiim; else but
Iho J', sijtho Say, it becomes very donbtl'id whether the J', fiiji/io
of the List of Dij'f. is identical with Say's species; this is the
reason why it has been omittcil in the synonymy. IJy all means,
as Mr. Walker does not descrilie his species, it is a imitter of
indilVerence what he nniy have meant by it.

Ohfcrcotion 3. — The Imperial Museum iii Vienna contains two
specimens of r. si])I>o Say, marked as beinjj; from New Holland.
As there are also two specimens of 1'. palletK^ with a similar
habilal, one is juslilied in supposinj^ that these indications are
erroneous.

3. !•. scatoer Loew. % . — Clialybeus vd viridis, nltidissimus, alarum
I'asfiis duabus iiigricuintil)us, antice conjiuu-tis et postice al)breviatis,
faitic mida, la'dihus in iitnujiic sf.\u tlavis, tarsoium intermediorum niarij^
ai'tiitulo primo iu latere aiiteriore pilis niiuutis erectis confertiiu ciliato.

Steel-blue or green, very shining ; wing.s with two blackish bands, which
are connected In front and abbreviated behind ; face without hairs ; feet
yellow in both sexes, the liist joint of the middle tarsi of the % closely
ciliated upon the front aide with short, erect, uiinute hairs. Long. corp.
0.2-4. Long. al. 0.24.

Sv.v. J^ilnpus scabir Loew, Neue Beitr. VIII, 8.J, 2.

This species is strikin<rly like J\ sipho, l)ut it cannot be taken
for its variety in conse(pience of the structure of the middle tarsi.
The above mentioned row of l)ristles, which the ^ nt P. sipho has
ujion the front side of the miihlle tibiie, exists also in P. .scaher,
but is more sparse; towards the end of the tibise, it is interrupted,
as it evidently api)ears, not in coiisc(|m'nce of the loss of some
siujrlc l)ristles. The lirst joint of the n)iddle tarsi has no bristles
whatever upon the front side; instead of that, there are sonuMpiite
short, stiir, erect, minute hairs of a blackish color, which form a

tK' ''''■

S'L >..

^ a^

PSIL0PU8.

261

very rough fringe ; towards the end of the joint they are decreasing
in length, and can hardly be distinguished at the end. The hind
tarsi of the only specimen which I possess, seem to be somewhat
shorter than those of a mule of P. xijtho of the same size. In all
other characters the agreement is coni|)lete.
IJab. I'enn.sylvania. (Von lleyden.)

4. P. patitolilaf MS Say. % and 9 . — Obscure viridis, iiitidus, alarum

fasciis duabus iii^'ris, antice conjunctis et po.stiuo abbreviatis, facie

pilosil, pediburf nigri.s.
^ , lliilteribuii iiigris, primo tarsorum anticorum articulo elongate et api-

ceiu versus in latere exterioro setis uigris armato, articulis duubus

sequentibus brevissiniis.
9 . Ilalterum capitulo llavo.

Dark-green, shining ; wings with two black bands, which are connected

in front and shortened behind ; face hairy ; feet black,
^ . Ilalteres black, the first joint of the fore tarsi elongated, and towards

the tip, upon the outside, beset with black bristles, the two following

joints extremely short.
5 . Knob of the halteres yellow. Long. corp. 0.20 — 0.23. Long. al. 0.20

—0.23.

Syn. Do!u:hopu-< patlbulntus Say, Journ. Ac. Philad. Ill, 87, 7.
JVilopun patihulfitus Say, Journ. Ac. Philad. VI, 1(J8, 2.
Psilopus putibit/atus Wikdemann, Auss. Zweifl. II, 225, 27.
Pxilopiin (uiuiliis Waf.kkr, List, etc. Ill, G48.
P.-iili'pus iiijirilus Wai,kek, List, etc. Ill, 049.
I'silopus patibul(iln.t LoEW, Neue Beitr. VIII, 85, 3.

j\[(de. Bright, shining, dark-green, often steel-blue, particu-
larly the head, the posterior part of the thorax, the scutellum and
also the front and hind segments of the abdomen. Proboscis and
palpi black. Face beset with long whitish or pale fallow-yellow-
ish hairs, but little dusted. Second joint of the antenme with
rather long bristles, the tliird joint small and rather rounded.
Arista distinctly dorsal, of moderate length. Front at the upper
eye-corner with a long, black pubescence. Upper side of the thorax
and the scutellum with long black bristles. Pleurjc black Avith a
green reflection and slightly dusted with white, which gives them
a somewhat grayish appearance. Abdomen shining green, the
first segments often, tlie two last generally, purplish-blue ; on the
anterior margin of the single segments there are black, not very

im

252

DIITKIIA OF SOUTH AMIMtlCA.

[I'Airr ir,

slmrply limited tnuisvcrst' Itiiiids, wliicli arc bi'diidrr tipnii tlio
hind s('i>'iiK'iits llinii upon tin' iiiitcrior ones. Pultcsct'iicc of ilio
ultdiiiiicii hltiok, whitish only uii the iiiiterinr part of tho latcrul
iiiarjiiii and (if tlic venter; tiie hiaeli lii'istles i)ef<ire tlie hind niiir-
jrin of tlie sinfi'ie sefi'ments are of a consideralile, hut not striklnji;
len^'th. Tile snuill liypopy<riuui is hlaik witli sundl lilaek lanu'lhe.
Co.\ie and feet l)laek, tlu,' fore til)iie only iu ininiatnro spccinicns
browuish-bhiek ; foru coxie and all femora with a {rreen rederiimi,
llio lore eoxio havo a rather e(mspicnoiis white pnliesemee, amonif
which are iii>erted some hlaek bristles; on the under side of the
femora there id a loiiji" erect puliescence, which has only very near
their tip a black, otherwise everywhere a whitish coloriuff. 'Piliiie,
besides the usual short black pubescence, with a moderate iiuinber
of black bristles, which nuiy lie easily overlooked on the hind tibia*,
as they are rather short and to be found only uixiu their out>ide.
First joint of the f(jre tarsi • \tremely elongated, aliout as Ioiil;' as
the til)ia' and nearly twice ti leuj^th of the four followin<>; joints
taken together; ui)on the outside, towarils the tip, frin<i'ed wiili
black bristles; the second and third joints arc of ecpial lenjrth, both
very short, taken t tji'cther only us hjug as the fourth joint ; the
lil'th joint distinctly shorter than the fourth, but longer than the
second and third taken singly. Middle tarsi plain, their lirst
joint nearly as long as the tii)ia and at least If times the Iciiglli
of the four following joints taken together; upon the front side
with a short and delicate fringe-like pubescence of a black color;
the following joints of a gradually decreasing length. Iliud tarsi
considerably shorter than the tibial, their tirst joint hardly once and
a half the length of the four following taken together, which gra-
dually decrease in length and arc not thi<'kened. Halteres black-
ish-l)rowu, sometimes more i)ale dingy-yellow. Teguhe with a broad
black margin and with long black cilia. Wings hyaline with the
usual siphou-like black picture, both bands, which f(jrm this; pic-
ture, are perpendicular, liroad, always connected on the fore nuir-
gin, au<l generally u\m\\ the fourth longitudinal vein, abbreviated
before the hind margin ; the lirst longitudinal vein reaches nearly
to the middle of the fore margin ; the anterior branch of the
fourth longitudinal vein diverges from it at an angle of TO to 80°
and turns afterwards at a rounded right angle towards the mar-
gin, which it roaches before the extreme apex, near the tip of the

'lii

PSIl,(»PfS.

2').3

.»,i

tliinl loiijfitudiiial vein ; the Iiiiul truiisverse vein fioracwlml olilinuo,
not (listiiH'tly siiiimtcfl,

Fcmah:. It rosi'ml)lt'S thu J" in the roloring of the Ixxly and
the f(H'(, as iiNo in tlio iiciiriitioii ui,il the pictiirr of tlii' wiiijfs. Its
fiicu lias a iiiucli denser wliiie dust. Tin; Itristles on tlie seenrid
jdiiit iif the aiiteiiiiiL' are euiisi(lern''ly shorter, tin l)ri>lh'S upon
thorax and seiiteUuni are likewisf of a lesser hiifftli and tlut>o
1)elbre the inei>'ires of the alHhtineu still luueh sliorter than in the
^ . The black Imuds of the ahdonieii are not apparenl when tiie
hitler is not more stretched out tiiau usual ; still the narrow,
sharply limited hind nmrji-ins of the seji'uieiils appear rather lihni.
in a certain lifjfht. Feet plain ; pulieseenee and l)ri.-iles of the
femora and tibial as in the (^ , Itiit shorter. Tarsi shorter than in
the ^ ; fore tarsi at least onee and u third tin' lenji'tli of the tihiie,
the lirst joint aI»out onee and a half the length of the tour follow-
in<r, which are of a decreiisinu- lenu'th ; upon its outside without
bristles, ^liddle tarsi distinctly longer than the tibia", their lirst
joint about 1.^ the length of the four following taken together;
hind tarsi distinctly sliorter than the tibia-; their lirst joint l)ut
little longer than the four following taken together, the length of
which diminishes rather rapidly. Peduncle of thehalteres brown-
i>li-black, knob yellow.

H(ib. Chicago, Nebraska, etc. [Comnuju everywhere in the
.Mi(hllo States, O. S.]

Ohserrafion. — Say mentions the occurrence of P. po/ihuhifiis
in Mexico. The specimens seen by him nuiy jxrhaps l)elong to
the following species, which is frecpuMit in Afc-'xico, and he may
have been mistaken about their identity with his P. ]>atibiilatHii.

,K'.,

m

5. P. melampiis Lokw. % and 9.— Viridis, saopp ex clialybeo

viridis, nitidiis, facie luidil, ahiruui farfciis duabus nigricantibus, antice

coiijuni'tis et postice abbreviatis, pedibiis totis nit^ris.
'J,. Abdoiiiiue fasciis aequalibus nigrirf oriiato, halterilnirf e.\ fusco nigris,

primo tarsoruni antic-orum articulo sotis nigris armato, artiouli.s se(iuen-

tibiis duobiis 11011 abbr«viatis.
9 . Fasciis uigris abdominis angustis, subobsoletis, lialte rum capitnlo flavo.

Green, often bluisli-green, shining, face without liairs; tlie two blackisli
bands ui the wing connected in front and shortened behind ; feet entirely
black.

% . Abdomen with black bands of equal breadth ; halteres brownish black ;

i \

m

254

DIPTKRA op XOIlTIf AMKIITCA.

[r.AllT II

tho first Joint of tlif fore tftrni lu'Hot with blnuk lirintles, tlie two follow-

iiiu' not fdioi'tt'iicd.
9. 'I'lio M.ick l),iii(lrt of tilt) (ilidoninn narrow mid ratlifr indistinct ; tlio

knol) (if thu haltoreH yellow. Long, corp, 0.17—0.22. Long. nl. 0.21

0.2:i.
Sv.N. /'.li/oiiim mildwiiiis LoKw, UitI. luit. MonatHchr. VI, 215, (iO.

Mdlr. Sliiiiiii}^ inctiillic-jrrci'ii, sonictiincH partly Iduisli-frrccn,
llic ]M(st('riitr itiirt oI'iIk' n1i<|oiMt'ii jfciifriilly stccl-ldiio. I'mboscis
iiiid |iiil|ii l)lii('lv. Fiicc ratliiT cldscly (jusfcd with white, liut with-
nut liiiirs. Aiitcnmc Ithick ; the second joint with niunerous unci
lonj? black Itrislies. Arista distinctly dorsal, of a more tliaii
moderate lenirtli. Front, iiesides the usual bristles, with a deli-
eate pulieseenee, which has near the upjM'r corner of the eve a
liluck, towards tlio middle of the front a neiirly whitish colorinjr.
Tpper sid(! of the thorax and the scutellum with ionj^ black
bristles. Tlenra' with a greenish rellection and dusted with white.
Abdomen shining green, the antei'ior segments often, the hindmost
usimlly, steel-blue; on the anterior margin of the single segments
there are sharply defined transverse bands, which are broader upon
the hind segnicnts. Pubescence of the abdomen blaek, only on the
anterior portions of the lateral nnirgin and of the venter, whitish ;
the black bristles before the hind imirgin of the single segments
are of a considerable, but nit striking length. The small black
liypopygium has snnill black himelhe. Cnxiv and feet blaek; fore
co.\u; and all the femora with a bluish-green or blue rellection.
Fore coxiu with a considerable whitish j)ubesceiice, am<ing wliicli
there are some black l)ristles. Upon the under side of the femora
there is a long erect pubescence which is whitish only verv iiciir
the basis, otherwise l>lack. Fore tibia* upon the outside with a
row of fiMir, or at most live, long black ))ristles ; the last of which
is inserted at some distance from the tip of the tibial'; ujton the
upjx'r side with three or four (piite sliort bristles, whieli may be
easily overlooked. The pubescence (tf the middle tibia? is some-
what more erect than that of the fore and hind til)iaB, and upon
the upper side, especially towards the basis, longer ; upon the
tipper side there are four or five longer bristles, the la.st of which
is inserted at a considerable distance from the tip of the tibiie ;
upon the under si(h' are four or five shorter bristles at erpial dis-
tances. The hind tibiiB have, besides the usual pubescence, upon
their outside about six bristles at equal intervals. The rather

psiropi'fl.

255

sIl'IkIci' fore tarsi iilduit once ami u half tin; Icii^lli of llif (iliiir;
llii'ir lii'st j(»iiil is niiicli Idiig-ci" tlian tlic roilitwin;;' talicii lnjiM-liii'i',
ami is friii^n'd ii|m)ii its outside witli six or seven Imijr l»ristles,
insei'te(l sdiiiewliat closer lowanis its tip; the lour last Joints of
tlie fore tarsi are of a fi'radiially deereasiiin' leiijrth and t)f au en-
tirely plain structure. Middle tarsi plain, alxmt once and a lliird
the lenu:ih of tli*! tilme, their first joint aliout \\ the lenu'tli of
tlie followini; taken top'tlier. It has upon its front and upper siilu
an exceedingly short and therefort! not (piil(; easily perccplihle
frinji'i'-like lilaelv pnltcscenee. Hind tarNi sliortei' than the hind
tiliiic, the fonrlli joint ultont !.{ tlie lenulh of the following;
taken to;r<'tlM'r. Ilalteres hrownisli-lilaek. Teji'uhe willi a very
broad ithick inarii'in and with lony lilack cilia. Win^s liyalino
with the usual siplion-Iik(! pi( tare j both bands forininfr this pic-
tun; are perpendicular, jicnerally of (tnly ni'.ldle breadth, always
connected on the fore inarfiin, sometimes also upon the fourth
loufritudiiial vein, and abbreviated l)efore the hind nniruin of iho
wiuf^s. The first loiiu'itudinal vein reaches somewhat beyond tho
midtlh' of the aiderior marji'in ; the anterictr branch of the fourth
lonji'itmlinal vein diveru'cs at an aiijile of about TO", and turns
afterwards at a somewhat. rounde(l riu'ht an^i'lo towards the mar-
gin, which it reaches before the extreme apex, near the lip of tiit*
third lon<j:itudinal vein ; the hind transverse vein rather oi)li(pio,
only little sinuated.

Fenuile. It resembles the ^ in the e(dorin<r of the body and of
the feet, as also in the neuration, and the picture of the winj;'s. The
glabrous face is dusted somewhat closer ; the bristles on the second
joint of the anlennm are distinctly shorter than in the other sex;
the bristles upon the thorax and scutellum are shorter, and those
l)efore the posterior nnirgin of the abdomen much shorter than in
the nmle. There is only a vestige of a black band on the basis of the
segments of the ab(b)men. Feet plain. I'nbesci'iice upon the
under side of the femora much shorter than in the male. Fore tibiiu
upon tho upper side generally with only two short bristles, upon the
outside with three, but little longer ones. Hairs on the middle
tibite not longer than usual ; upon their upper side there are
generally only three black bristles, two near the basis and one
beyond the middle; upon the under side there are generally four
small bristles at ecpud intervals. Hind tibia' as in the ^ . Tarsi
shorter, plain ; the first joint of the fore tarsi without bristles

.1.) ' /,'

ii-.l

•■m

m

t

f^'i

.)<)

Ull'TKUA OK Ndinil A.MKUICA.

[I'AltT ir.

Hall

I'lX'S \VI

itli Ijlurlvisli pL'iliiiicle luiil ye

ildW

U}i(iM tlio (iiU.^kIc
kii(il).

Jhib. Mexico.

Ohxcmi/iuii 1. — This si^'cii's varies soinewliat in tlio exteiisidii
of I lie hands on tlie wiiijjs, still they are never as hmad as in /'.
2>iililnilnU(i^, but sonietinios interrupted between the third and
Inurth lonii'itudinal veins.

( )/)sfrffi//\tii '2. — I was in possession of the j of this spec ies a
U)UiX tiiiHJ au'o, but allhoujj,'h convinced of its speeilic disliiiclne-s
(vid. Neue I5eitr., N'llI, SC), i woidd not deseribi; it withoul llie
male. It is easily (listin,i>'uished in both sexes from J\ ixitilxildhi^,
with which, anionu' the spi'cies known to nu', it has the do

re-

niblauce, bv it^

-fni

abrous face, and besides, in the mah

diU'erent structure of the fore tarsi. J presume that Say luis con
founded tliis .Mexican species with his J'. jiaUlndalii^s, tif which h
savs he has seen Mexican si)eeiniens.

<i. 1*. pilosiis Li

% . —V.K. clialyliuo viridis, iiitidus, aluldii

fasciirf at'(jiialil)us iiigris oriiato, alarniii fasciis dualiiis iiimii'aiitilnis,
aiitice t'onjunt'tis et jiostice abliroviatis, tacit; midil (.'), ju'dilms ini:iis,
tihiis aiiticis tarsoruni(]Uo interniedioruui articulo luiiuo ti-staccis, lim- ft
tiliiis intcniU'diis in latt .v' superiort; lircviter ciliatis.

51iiish-i;n'('n, shining, altdonit'ii witli ecjual, l.road, l)laok bands : tlic two
lilackisli liands of tin; winiis connectccl in fiont, slioiteiicii tudiiiid ; lacn
without liairs (.') ; ft'ct l)hu'k, the fori; tiliia and tlic liist joint ol' tlic
iiiiildle tarsi hrownish-yeliow ; tlio lattor and tlie middle til)ia' niion Iho

UplH'l

(U

rovidod witli sliort cilia. Loi

Lon

il. 0.

Syn. Pxilopiix ])ilosu.t LoEw, Keue Beitr., VIII, 8(5, 4.

Briirht <rrceii, tlie head, the hind ])art of the thorax, tlie scntel-
liini, as also the basis ami the tij) of the alulonu'n, in the descril)ed
si)eciiueu, more steel-blue and brijrlit shinin};-. J'alpi black ; pro-
boscis l)rowiiisli-vt.'ll'>\v. Face rather doselv dusted with wliite.
in the described specimon without all ]»ul)escence, which howcvei
may have been rubbed oil'. Second joint of the auteniuo upon the
under sido witli rather long, upon the ui)per side with shorter
bristles, these curved forward; third Joint snniil, rounded; aii^ta
distinctly dorsal, of medium length. Front with a black piiliescence
in the upper comer near the I'ye. Thorax and sculeliiim with
rather long black bristles. I'leuriu black with a greeu relleetion,

I'SII.dl'IS.

•)(

"•.iincwluit ,uriiy, liy liciiiL;' .-I'u'Iidy diislcd witli wliilisli. PiiIh'scciico
ci" tin; alidomcii iiioi'o ('[(ci aiul lonii'tT ihaii ii.-inil, hhidv, only
v.liitisli 1)11 llic [interior piirt nl' llic lalcral iiiar,u-iii and i>\' llic vciilcr.
Tlio .small liypopy.u'iiim lilack, with liiackisli-hrowii laiiulhi'. ( 'o.xa:
and I'l'ct black ; <'().\ii! with a firccnisli icllcctidii, raliicr closely dusted
with wliitu; the forciiiost with a distinctly whitish piiliescencc and
with some stout lihick ln'istlcs. ruder sidi- d' t!ie t'eniura with a
delicate, ioiit^, erect |inl)escencc which, (|iiite iicai' the lip of the
leiiiora, has a hlack, otiu'rwise everyu here a whit ish cidorin^-. I'"ure
tihiii' yellowish-hrowii, upon the upper side dark-hniwn, and near
the Itasis almost lilack, npiti the ontside rriii,u:ed with not, very nu-
iiicroiis, liut proportionally loiiu' black bristles. .Middh; tibia; lilack.
oidv vellowish-browii at the end oi' the inner side, ciliated niton
Ilic iVont si(h! with a reundar mw ol' inodcrMtcly lonu' black bristles ;
upon the upper side Irinu'cd with moderately loiiji; and somewhat
erect black hairs, upon the first third of the hind sidt; with some
moderately lonj^ black bristles, !it the tip with three loiiji'cr black
liristles, of which oni; is inserted on the inner side, tlu! two others
upon the I'ront side;. Hind tiliia; entirely black, rather loiiir, with
somewhat coarse Idack hairs and a l'cv\ short lilack bi'istles, which
are inserted lietwceu the upper and the hind side. Fore tarsi slender,
nearly twice the leiiji'th of the tibia;; the lirst joint alom; is some-
what loiiii'er than the tibia and about once ami a third the lenjith of
the four following taken to.ti'cther, tho lenu'th of which is rapidly
decreasing ; no unusual pubescence or bristles are to lie seen on the
fore tarsi. Middle lai'si twice the h'ligth of liie tiiiia-; their lirst
joint alone much loiiu'cr than the tibia, about once and a half the
length of the four following taken together, brownish-yellow,
straiglit, somewhat stouter than usual, upon its upjier side regularly
cilialeil with erect, iiiinnte, black hairs ; the four last joints black, of
decreasing lengtli. Hind tarsi entiridy black, much slnu'ter than
thetibiiu; first joint once and a half the length <if the four follow-
ing taken together; second joint aliout as long as tin; three
following taken togellier ; these are rather short, of almost ecpiul
length and somowliat flattened, so that the end of tlie hind tarsi
looks somewhat stouter than iismil Halteres black ; tegnhe with
a broad bla<'k liorder and h»ng Idaek cilia. Wing> liyaline, propor-
tionally larger than in /', fKitihuldliiH with the usual siphou-like
black ]iiettire ; tiie two liliick bainis not particularly broad, as
usual, shortened l)eliind, only coiineeteil (Mi the fure margin ; the

n

Xi ,.

RpT ■

m

?■ ... . ■ V

I i ■■ '

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^ ii;

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It

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H

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.[

258

DII'TERA OF NOHTII A:\IKRICA.

[PAKT II.

anterior branch of tlic fourtli loniritiuliiial vein divorg'os from tliis
at an aiiprle wliich a})j»roaolii's a riu'lit oiio and turns iiftcrwarils
towards the niarfrin at a rounded aii<rh', wliich is ))ereej»tilily
larger tnan a rigiit one ; it reai'lies tiie margin Itei'oro the npex
near the tip of the third longitudinal vein ; posterior transverse
vein ol)li(pie, distinctly sinuated.
llab. Culja. (lliehl.)

T. F'. jllCUlldUS LoEW. % and 9- — Viriilis, vfl ex viridi chalyl'pns,

iiitidurt, alarum fasciis dualius nigricautibus, antice conjunctis et pos-

tice abbreviatis.
^ . Abdoinino fasciis latioribns nipris ornato, lialteribns fn«cis, coxis jipdi-

bus(nie iiigris, tibiis anterioribu.-; tarsomuiiinn anticoruni articulo juinn)

flavis, tibii.s posticis ex iiigro fnscis.
9. Abdominis fasciis nigiis angustissimis obsoletis, halteribus, cfixis

anticis pedibusque tlavis, genibiis posticis, tibiariuii posti(;aruni diiiii<lio

apicali, tarsoruin anteriornni arliculis quatuor ultiiuis, tarsis deni'iuu

posticis totis ex uigro fusuis.

Green or green-bine, shining ; the two blackish bamls of the wings coii-

nei'ted in front, shortened behind.
% . Abdomen with broad black bands ; halteres brown, coxa; and feet

black, the four anterior tibiffi and tin! first joint of the two fore tarsi

yellow, the two hind tibiae blackish-'" :)wn.
9. The black bands of the abdoin;'. very narrow and indistinct; hnl-

teres, fore coxa; and feet yellow, the knees of the bind feet and the ajiical

half of tht hind tibiaj, tlie four last joints of the four anterior tarsi, ami

the whole posterior tarsi blackish brown. Long. corp. 0.15 — li.iiO.

Long. al. 0.18—0.20.

Sv.N. Psilo/iiis sijtho Macquart, Dipt. exot. TI, 2, 110. Tab. XXI, Fig. 1.
PtiUujiimJiiruiKhis LoKW, Neue Reitr. VIII, 87, 5.

MaU'. Bright green, tlie head, the hind jiart of the thorax, tiie
scutellum and the basis of the altdomen more steel-blue in the
described specimen. Palpi black. Proboscis yellowish-brown.
Face without hairs, moderately dusted with white. Bristles upon
the second joint of the anteniuii and tlie arista not very long, the
latter distinctly dorsal. Front with a scattered wlii'. imbescencc.
Thorax with but moderately long, scutellum with 1 mger bhick
bristles. Pleurte black with a green reflection aii'i 1 .ither closely
dusted with white. Abdomen with iilack bands at the basis of
the single segments, which are broader on the hind segments than
upon the anterior ones. The ^cattere(l pubescence of the abdomen

V

rsiLons.

259

lilack. wliitish only on tlic anterior juirt of lln' lateral niar<riii and
of tilt' vontcr. 'I'lio l)la('k liri.-tlt's bctori' tlic iiind maruiii of tin'
siiifrk' scjrinciits of" a very moderate length. Tlie very small liypn-
pytrinni Idackisli ; the lilaekish-brown lanielhe very narrow, nearly
lilit'orni. Coxa; l)laek or Itro\vnish-l)laek, somewhat dusted with
white, the foremost with a rather distinet white juilx'seenee and
with a few black l)ristles. Femora black, with a green reflection,
the extreme tip of the foremost ones yellowish, that of the hind ones
brown ; their lower si<le fringed with niinnte, erect whitish hairs,
which are much more scarce ami longer on the hind femora. The
fore femora have, upon their hind side near the tij), three successive;
black liristles. Fore til)ia) yellowish, upon the first half of their
hind side with three rather eonsideral)Ie bhick liristles of a decreas-
ing lengtli. Middle tibiie yellowish, with a few i»lack bristles at
the tip, otherwise only with some very short minute l)lack l»ristles.
Hind tiliia' daik-brown, with the usual black hairs, i-'arly without
any apparent bristles. Fore tarsi slender, over IH the length of
the tibia> ; their first joint is yellowish-brown, darker at the tip
and not tpiite as long as the tibite, also hardly longer than th(!
four following joints taken together; it has upon its hind side three'
rather considerable bristles of increasing length; the four follow-
ing joints of the fore tarsi are l)lackisli-l)rowu, more yellowish-brown
at the basis, at least once and a half the length of the tibia' ; their
first joint nearly as long as the tibiie and once and a third the h ngth
of the following joints taken together, which are of a decreasing
length ; no unusual pubescence or l)ristles on the the middle tarsi.
Hind tarsi brownish-ldack, distinctly shorter than the tibia"; first
joint hardly longer than the four following joints taken together;
the length of the l-atter is rapidly decreasing Ilidteres dingy-
brown. Tegnhi' with a narrow black margin and l)Iack cilia.
Wings hyaline with the usual sii)hon-like blackish ])icture; the
two bands are peritendie'ida**, of medium breadth, still rather dis-
tant from each other, connected only on the anterior margin ; tin'
anterior lirancli of the fourth longitudinal vein diverges from it at
an angle of about 1^)° and turns afterwards towards the nmrgin
of the wing at a b>it little rounded angle ; it reaches it liefore the
apex, near the third longitudinal vein ; jiosterior transverse vein
moderately obrujue and nearly straight.

Female. Face likewise without hairs. The bristles on the
second joiut of the aatennai much shorter than in the male ; the

!

^m*

.(:i

<)■

200

niPTKRA 01 NOllTII AMEUICA.

[part II.

ar'.ita, tlic bristles ii])on tlie tliorax and itjion the Hcutolluin are
iisu distinctly sliurtor, those liet'ure tlie hind murgiii of tiie se<>--
mcnts of the abchtinen much sliorter than in the male. Transverse
1)auds at the Ijasis of the segments of the ul)donien are iircscnt,
hilt very narrow. Fore coxa- yellow, with a whitish i)ul)esc('ne('
and a i'^^w black bristles. Middle and hind coxuj black (tr black-
ish-brown. Femora yellow, the extreme tij) of the hind IVnioia
dark-brown, the under side of all beset with very short minute
whitish hairs; on the hind side of the fore femora there are only
ii \'itw minute black hairs near the tip, itut no bristles. Tibiie
yellow, the extreme basis and the apical half of the hind ones
brown ; the fore tibiic near the basis with a small minute bristle
upon the upper side and, farther towards the midille, with two such
bristles upon the hind side. The middle tibite have, besides the
])ristles at the tip, a few more bristles, which are longer tliiin In
the male. Hind til)iie U[)oii the outside with two, 'xt the utmost
with three, quite short black bristles. Fore tarsi about once and
a half the length of the til)i:e, dark-brown ; the first joint as long
as the four following taken together, upon the hind side with three
hardly perceptible, short bristles. Middle tarsi blackish-brown,
only brownish-yellow at the basis, distinctly longer than the til)iie;
their first joint over 1^ the length of tlic following taken together,
which are of a decreasing length. Hind tarsi blackisii-brown,
otherwise as in the male. Wings exactly as in the male.

Hah. Culia. (Iliehl.)

Obt^crralioi} 1. Brazilian specimens of P. J unoidus are to he
found in Wintheni's and Wiedenmnirs collections.

Ohscrratinn 2. I hope not to have been mistaken in the
siiecitic identity of both sexes, althougli the 1)ristles of the tibia" in
the 9 do not corres])()nd exactly to those in the (-f , as is usually
the ease. The great resemblance in the neuration and the picture
of the wings seems to warrant the specific identity. Should I be
mistaken 1 beg to take the J* for the type of the species.

B. Tr//(f/.s ivithout dnrk picture.

Ar First longiindinal vein cxii'nditig fur hei/ond the. middle of the wing.

8. P. ciliatlI8 LoKW. % . — Chalybpus, nitidissimus, alls immaculatis,
vciua longituilinali prima eloiigata et costS, pilis .'irl)t'!->,i'iriia ciliat^,
peflibus iiipris, tarsorurn ai)ticoruiii articulo pri'j:n nigio aauK^^t*, articulo
secundo perbrevl.

;?;■*.

"•i.i;f'i

PSILOPUS.

2(;i

Steel-blue, very sljinin? ; wines witlimit jiicture, tliinl l(iiigitiiiliii;il vein
elmigiitt'd, uosta ciliated with exticiiK-l y dclii-ate, minute liaiis. Ft-i-t
black, the lli'st joint of the Ion; tarsi with black bristles; the second
extremely short. Long. eoip. 11.17. Liiig. al. U.IS.

Syn. (?) Psilopiis tuuntliis WiKi)., Auss. Zweill. II, 227, 31).
I'siliijjiis (ilialu.^ Loiiw, Neue 15eitr. VUi, fcb, (J.

Very shining .stt'cl-hluc, the uijpcr jtart of tlio f;ieo, tho middln
of tlic front and tlie liitcra! nuiru'in of the iilxlonicn ^timmi, tlin
sitk's of the front and tlio niiddic of tho al)(h)Mi('n of a Itcautifid
jturpii.sii color. Face witliont liairs, oidy tlic lower jiart sdniewiiat
dusted with white. Talfti ))lack ; j»rol)o,<cis l)ro\vn. Antenna!
unusually short; their seeoinl joint with moderately lon^ liristlcs;
third joint snnill ; the arista not vei'y lonji', snl)a|)ical. IJi'istles
u})on tliorax and scntelluni of niediiiin lenulh. IMenra' hiaek with
a greenish relleetion, gray on aeeonnt of a whitish dust. Al)do-
nion sliorter and brcjader than usual, i)laek. on the lateral niai'gin
and on llie venter for the most jtart whiti':h; the bristles Itrfore
the ])ostcrior nuirgin lA' the single segments of only a moderate
length ami thickness. The small hypiipyginm black. Co.xa; and
all the ff.'et black ; fore co.xie with a white i»ul)escence and with a
few black bristles. Feim)ra with a g'"een redection, n])on the under
side very scarcely fringed with long, erect, minute hairs, which
have near the tip of the middle ami of the hind femora a black,
otherwise a whitish color; the hind side of the fore femora has
a rather distinct l)lack pubescence towards its end. Fore tiliia;
upon the outside with numerous hair-like, rather long, black bris-
tles. Middle til)ia' beset with a moderate number of proportion-
ally rather long black bristles. Kind til)i;e upon the outside
witli a row of about six black bristles. Fore tarsi but little longer
than the tibiie ; their first joint oidy very little longer than the four
following taken together, fringed upon its outside with nmny black
bristles; the second joint e.\treim'ly slw^rt, hardly as hnig as the
fifth and but very little longer than half the third ; the fourth
joint only very little shorter than the third. Middle tarsi some-
what longer tliaii the tiliiie ; Hrst joint al)out once and a (piarter the
length of tlie four following taken together, with a few very short,
black bristles; the second to the fourth joint (»f gradually decreas-
ing length; lifth joint very snmll. Hind tarsi much shorter than

the tibiie, the lirst joint but little longer than the four follow!

nng

i)

r

f

•

3

m
I

iii

i:

2152

DII'TKIIA OF NOIITII AMKKlCA.

[I'ART ir.

taken togcthor ; the second to the fourth joint of gradually ih'-
creasin-? length, tlie lilth joint very short. JIaltcres dingy eiayish-
yellow, the basis of the jx-dunele Idaek, and the upper side of the
KMol) brown, 'reguhe witii a broad black margin and long black
cilia. Wings hyaline with black veins ; an.xiliary vein unusually
indistinct, still jtresent, tirst h)ngitudinal vein extending far
beyond the nuddle of the anterior margin ; the nnirgin has a fringe
of very delicate, erect, curly, minute hairs, from the humeral trans-
verse vein to the tij) of the lirst longitudimd vein, which are
longest between those two points where the margin is slightly
sinuous ; the anterior branch of the fourth longitudinal vein
divei'ges from this at an angle which is almost a right one, and
turns afterwards, more in a curve than at an angle, towards the
margin of the wing, which it reaches before the iv\.K, imnu;diately
near tlw; tip of the thiril longitudinal vein ; tlu; jiostcrior trans-
verse vein is rather obliiiue and only very little sinuatcd.

JI(il). Florida. (Osten-Sacken.)

Ohf^crritlinn. — I have already remarked al»ove, with regard to
1\ inuiidiis Wied., that /'. viliahm dilfers from it oidy by its
larger size, its more steel-blue than purplish coloring, and, as
it seems, by a very trilling dilTereiice in the bristles (d the fore
tibiiu ; it is therefore very likely but a mere variety of the former.

B. First longitudinal xuiu at the most reachimj to the middle of thi; whig.
1. Arista apparently apical and strikingly elongated.

9, P. COSIiatlls LoKw. 'J, and 9- — Viridis, ex parte chalylieus, niti-
dissiinus, fas(;iis alidominalilms obseuris nullis, seta anteiinaruin sub-
ai)icali elongata, jiedilms longis, gnic'ilil)us, dilute llavis, coxis feuiori-
l)UH(ltie nigiis, setis in superiore tibiaruni anterioruni latere peiloiigis.

^. Setis capitis, thoiauis, sfUtelli abdoniinisijue tenuibns, loiiu'issiinis,
appeiidicil)as hypopygii ]iallidis, tarsorura anticorum artieulo piimo
tarsisiiue iiiterinediis supenie eiliatis.

f . Setis capitis, thoracis, scatelli abdoniinis(jiie teimibns, niediocribns,
tarsornm anticorum artieulo priiuo setalis niinutis subciliato, tarsis
interniediis simplicibus.

Green, }>artl v steel-blne, xfry shining, without dark bands on the abdomen :
wings without {lictiire ; the elongated arista apjiarently ai>ical ; feet
long, slender, pale-yellowisli, cox.t and t'eiuora black ; the bristles upon
the vii)per side of the four anterior tibiic very long.

% . Bristles upon head, thorax, scutelluui, and abdomen slender, extremely

PSILOPUS.

2r)»

long ; the appt-ndages of tlit^ liyii(ii)vgiiuu i)alo ; the first joint of the fore
and niidille tarsi (.-iliated upon tlie upper side.
9. Uristlt's uiiiin liead, thorax and uhdonieii, slender, of medium length;
the first joint of tlie fore tarsi indistinctly ciliated with very short
minute hristles, middle tarsi plain. Long. corp. 0.18 — 0.113. Long. al.
0.20—0.24.

Sy.v. Psilujnis cdiiuitns LoKW, Neue Beitr. VIII, 80, 7.

Male. IJrijxlit sliiiuiijr-}J:recn ; tlionix and Kcutclluin (in the
(loscrihcd sitecinit'n) iiiorc stccl-bliio, and llio head liiindsume

]»urpiisli

■hluo

J'iilpi lilack ; jJi-oliosciH brown. Face; williuut

hairs, liroach'P than usual; its small under side is dusted with
ji,'ruyisli-\viiite, the npix'r part more convex and, iVom a side view.

more projeetinji; than usual

Tl

le second joint of the iintenntu

with a small number of rather loiij^, Init not very stout hristles ;
the third joint ovate; arista ajtparently ajjical, but, in fact, oidy
sul)apical, still consideral)ly shorter than the b(t(Iy. Kroni with
a scattered, very delicate white ]>iiltescence ; the black l)ristles,
inserted upon the ocellar tiil)ercle and in the immediate proxi-
mity of the ujiper corner t)f the eye are hair-like and of a (|iiite
unusual lenf!;th. The l)lack bristles upon the ni)per side of the
thorax and of the scutellum are of the same hair-like descripticjii ;
also those inserted before the incisures of the alidoiiien, the latter
are oidy of a still more strikinj; lenji'ih than the former. T'lion
the upper side of the abdomen there seem to be, besides the loiiif

bristles before the incisures, onlv sin

>hort hairs of a lilack

color; u))on the iirst scii'inent, however, as aho on the lateral
niarfrin and on the venter, there is a very lonir whitish ])nbescence;
lonji-, hair-like, black bristles are also to be found on the hind
niarii'in of the segments of the venter, similar to those upon the
upper side of the alxlomen. No lilack bands are jjcrceptible at
the base of the aliiloininal segments. The hypojiyginm is jiartly

destroyed in the described s))ecimen ; it seems that it was
ish-l)lack, and that it had liorii-shai)ed yeli

ow aiiiieiulaL^cs.

br
(

own-
oxa»

))lack, the foremost with a long white pnl)esceiice and with some
black l)ristles. Femora black, with a green reflection ; th»f very
extreme tip of the foremost ones yellow, all fringed with a scattered
erect pnliescence of

a white color, which is evervwln re of a con

siileraole length, but longest uiion the under -u\

Tilii,

e an

d t

1 rsi

very slender, yellowish ; the usual black hairs ratiier scattered and
very short. The fore tiijiie upon the Iirst two-thirds of their

2G4

DII'TF.HA OF NOIlTir AMKUICA.

[I'AllT II.

\i\)\)ov si(U', fi'iiifrcd with a row of liair-likc Itristlcs, which ar(!
ahcriiatc'Iy of I'ciiiai'kal)!^ h'iii;'th, and iIk' hist of which much o;-
(mhmIs all the others in Icnjith. Alitldlc tiliiiu with a moderate
nuiiihur of hair-like blaek bristles, which are als(j (lihMii^iiishcil
by their iiniisiial leiiii-tli, especially those upon their upper side.
Hind tilda^ only upon the upjier side with short bristles, wliicli
arc but little distinji'iiished from the usual uunute hairs.
Fore tarsi at least twice the lentfth of the tibia-, very slender;
their first joint somewhat lonji'cr tiiaii the four fidlowiiiu- taken
tofjfcther, upon its upper side willi a regular row of pi'opor-
tionally very lona' hair-like black bristles; the followino- j(dnts of
rapidly deereasiiifr lenuMJi ; the third, at the upper side ofllie tip,
with a siiiji'le bristle-like bhudvhair; the lifth joint blackish-brown.
3Iiddh( tarsi Vf'ry slender, al)out once and a third the lenjrlh of the
tibiiu, from the tip of the third joint I)lackish-brown ; their lirst
joint about ov(!r \^ the leiifrth of the four followinii' taken to-
frether, the leiitrth of which is ([uiekly decreasinir ; upon its upjier
side it is rej^ndarly ciliated with bristle-like liairs; this frinji-e con-
tinues over the upper side of the three following" joints, Imt there
it is shorter, more delicate, and closer ; the last joint is not ciliated,
but has upon its up])er side a sliort, appressed, snow-like ])ubes-
cence, which is not very distinct. Hind tarsi not (piite as Ioul''
us the til)ia' ; their first joint yellowish-brown, distinctly loiiji'cr
than the followinji^ taken toji'ether; tliese arc blackish-bnjwn and
of deereasiim: lenji'th. llalteres yellowish ; tefi'uhc with a bnjad
blaek margin and long l)lack cilia. Wings somewhat narrow,
hyaline, with blackish-l)rown veins, nt)t ciliated on the fore mar-
gin, the first longitudinal vein reaches nearly to the middle of the
fore margin ; the anterior brancli of the fourth longitudinal vein
diverges at a rather acute angle and turns towards the margin at
R rounded right angle, reaching it before the apex, near the tip of
the third longitudinal vein ; hind trans\orso vein very oblique,
little sinuated.

Female. It resembles the male very much. Face somewhat
broader. Bristles on the second joint of the antennas, the arista,
the bristles upon the ocellar tubercle, at the ui)jier corner of the eye,
upon llie upper side of the thorax, and u))oii the seutellum shorter;
the l)ris(les before flic IliclsiireH (d" the alidomen are very consider-
ably shorter ; on flie veidcr, ns it seeinH, there are none at all.
The black pubescence upon the upper side of the abdomen is less

T^

pcrlia

2C5

)S soiiicwlint niblx'tl

psiLorus.

pcnrro than in llic male, if it Iins not Itccii
nil' ill tlic lattc'i"; (lie wliitisii idilK'scciict' of tlii' voiittT iiiiicli sliortrr.
Frrt of tlie same coloring as in the male; the wliitisii imljcsccnco
of till' fciiioi'ii is nuicli shorttT, still ii]»oii tlit'ir under side of
t'onsicloniblo loiifrtli for a fcmalo; upon tlic under siile of the fir(>
fi'iiiora, near the liasis, t'lerc are also some stilf, nearly liristle-like
whitish hairs of a reniarkahle lenj^th. I'lilx'seeiiee and bristles of
tlio tiliiiu f^eiierally like those of the male, still all bristles are not
so louf^, and ujioii the ui)[)er side of tiie fore tibia", the alternating^
shorter bristles are very small. Fore tarsi hardly once and u half
the leiifrth of the tibiiu ; their first joint much loii;rer than the
follo\vin;i: taken tofrether, friiifred upon the u[»p(r side with a
re</:iilar row of short black bristles, upon the underside with only a
few still sliorter black bristles ; the followiiiff Joints of decreasinj^
lenjjfth, from the second to the fourth brown, the liftli Ijlack. Middle
tarsi distinctly loiiffcr tlian the tibiie, not ciliated upon the upper
side ; the lirst joint distinctly I(uiffer than the four followinjj^ taken
together; the latter l)lack-brown and of (h'creasing Icngfli, Hind
tarsi brownish-lilack, much shorter than tli<' tilna", the first joint
hardly somewhat longer tluin the following taken together.
Wings as in the male, only somewhat shorter, also proportionally
less narrow.

Hub. Middle States. (Osten-Raeken.)

Observation. — Whetlier the distinctly darker color of the tarsi
of the 9 is only an accidental, individual deviation or Jiot, cannot
be judged from a single specimen of each sex.

2. Arista distinctly dorsal and not particularly elongated.

a. Fore tibiae only iu the % , fore and middle tibi.c in the 9 > yellow.

10. P. clirysoprasilis Walk. % and 9- — Viridis, vel ex viridi

chalyheus, nitidus, alis iiniaaculatis, facie nuda.
%. Abdoinine fasciis latiusculis nigris ornato, halterum nigrorum capitulo
fusco, peilibus nigris, tibiis auticis tlavis, tarsorum internu-dioruiu
articulo prime superne pilis eroctis rigidis ciliato.
9 . Abdominis fasciis nigris, angustissimis, halteribus flavis, pedibus nigris,
tibiis anterioribus flavis.

Green or greenish blue, shining ; wings without picture, face without
hairs.

% Abdomen with rather broad black bands ; knob of the black halteres
brown; feet black, the fore tibiiB yellow, the flr.^t joint of the middle
tarsi upon the upper side ciliated with upright stiff liairs.

i

W]

■ HI

' f

: J

' Mit:

UJt:i

■J

Hi

2r>o

DIl'TKUA OF NdllTH AMF.IIICA.

[I'MIT n.

9 . AIpilfHiieii with cxtrciiu'ly imridw li.iiids ; lialteies yellow ; ft-ct lilaik,
foiv .iiiil uiiddlo tibifo yellow. Long, wiy, u.l'J — U.23, Loug. ul. 0.18
— (».:!(•.

SvN. PsilD/iiis rhrysoiiriisl Walkkk, List, etc. Ill, il46.

J'siliiims chri/suiirasius LtiKw, Neue beitr. VIII, 90, 8.

.}f(ili\ Very sliiiiiiifr, frrccii, tlio liciul, tlio liiiid psirt of tlio
lliorax, llie .scutclliiiii, and tin- mitcrior st'};ini'iits (if llu; hIkIoiir'ii
iiinro stocl-ltliic, tlio last scjiiiiciits of tliu uImIoiikmi soiiictiiiics
froldcii-iiTct'ii. I'alpi black ; proboscis brown. Face witlioul
liairs, tliinly (lasted with white; its upjicr jiurt rather convex.
'J'lic bristles on the second joint of the antenna; rather lon<jr ; the
nrista dorsal and of ordinary length. Front with a lonjj whitish
ltnl)escence and the usual black bristles upon the thorax and the
scntelluni of a rather considerable lenjrth. The black bands of
the abdomen are narrow upon the anterior scfrnients and of con-
siderable breadth upon the posterior ones. The black pubescence
of the altdonieii is rather short ; upon its first sejriuents, as also
ui)on the anterior part of the lateral niar<>in and the venter there
is a delicate white pubescence, while the hind part of the venter
lias a black jtubescence of considerable Icnj^th. The black bris-
tles l)efore the incisures of the abdomen are numerous, but ratlier
short. The small hyi)opyjj:ium black, its lamelhe dark-l)rown.
Coxie black, the foremost with a considerable white ))ul)esceii(.(j
and a few black bristles. Femora black with a prroeiiish reflection,
upon the under side with a lonj,', upri<>'ht, whitish ])nbescence.
F<»re tibia' brownish-yellow, frin<>-ed with oidy a moderate number
of short black bristles. ^Middle tibiiu brownisli-black, sometimes
nearly black, beset upon the front side with a rcfrular row of black
bristles, otherwise only with a small nundier of them ; upon the
ii])per side with rather bristle-like black liairs. Hind tibia; black
with coarse black hairs, upon the outside fringed with a regular
longitudinal row of black, only moderately long, bristles. Fore
tarsi rather slender, about once and a third the length of the
til)ia' ; the first joint brownish-yellow, much longer than the
fullowing taken together, ujion the hind side with three or four
sliiut black bristles; the following joints blackish-brown, from
the sccoikI to the fourth of rapidly decreasing length, the fifth as
long as the fnurth. Middle tarsi about once and a half the length
of tho tibia) ; the first joint black-brown, nearly twice the length

AH

(llO
U'll

ics
'III

'.V.

le

rtiii,(»i'i a

JOT

of tlif fdllowiiifr 1 ilicii tt)ii'<'tli('r, upon its upper <'uh with a
I'l jrular IViii;;!' nf stilV, pcrpciKliculiU'ly civel, luistlc-Iikc, minute
liairs, npiiii tlio uikIci' sidf willi ul)out Hcvcd niinutf Idiick
bristles; tiie joints of tlie tiic.-i fniin tiic seeoinl to the ruiii'tii very
rupidly (h-crcast! in leiitrth. so tiiat llie second is still Miincwhal
loii^rer than tlu; third and fourth taken toffelher ; tliu lifth joint
not shorter tlian liie Iniirtli ; the eiiiiitiou of tlio lirst inint ul' the
t irsi continues also over tlw; up]ter side of the xcoiid and
third joints, hut C(uisists there of litlh miirs of frradually diniin-
i.>hinj; len^ytli, so tiiat linally it heconies alnin-i inipci'eeptihio.
Hind tarsi black, pereeplihiy shorter than the iii)ia! ; (heir lirst
joint soinewhiit htn<;'er than the followin^r taken tuirciher, tlu;
ieiijXth of which is fi'radiially decreasing'. Ilalteres lil;ii-kisii, the
kiiol) brown or dingv brownish-yellow; the teji'idie witii a liroud
blii'k border and loiiii' lilaek cilia. Winj,rs hyaline with black
veins; tiie lirst longitudinal vein reaches nearly to the middle of
tin; winj; ; the anterior branch of the fourth lonuiiudimd vein
diverj^es from it under a nearly vi;i'ht aiiffle, aixl turns afterwards
in a curve towards the niarji'in, which it reaches rather hir from
11' ' apex, immediately near the tij> of the third loiifritiidinal vein ;
hind transverse vein rather obli(|iie. hardly somewhaL sinuatcd ;
the si)iice between the nuirjrin of the wiiij:^ and the third lon^itu-

diii

al vein,

bey(iiid thi; tip nf the lirst loiif^itudinal vein, is S'juie-

what more frrayish than the reiiiainiiiir surface of the winj.""

^\'mah

erv

like the

<i-

The face but little broader.

The arista, the bristles of the second joint of the antcnme, those
upon front, thorax and seutellum, as also l)eforo the incisures of the
abdomen, are much shorter. The white pui)esceiice on the under
side of the femora also shorter, still (tf a considerable length for a
9. Fore til}iie as in the (^, still the bristles shorter. Middh;
tibiiC browiush-yellow, with scattered black bristles of mediuiii
length. Fore tarsi but little shorter than in the (-f, however of
the same struetun; and coloring. Middle tarsi plain, brownish-
black, not quite once and a half the length of the tibia* ; their lirsL
joint not ciliated. Ilalteres light-yellowish with blackish peduncle.
Wings as in the (^ , still without the gray shade, which is to bu
found in the latter beyoud the tip of the lirst longitudinal vein.
Uah. Cuba. (Puey.)

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IMAGE EVALUATION
TEST TARGET (MT-S)

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2.2

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11.25

1.8

1.6

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Phctographic

Sciences

(Corporation

33 WEST MAIN STREET

WEBSTER, N.Y. 14580

(716) B72-4S03

^4*

208

DIl'TEUA OF NOnTII AMERICA.

[part II.

y

!l

b. In the iinle all the tibiu?, in the feiuulu alKo all femora ^^ellovr.

11. I*. sc'Obiliator Iaikw. % and 9. — Parvus, nitiilissiiiiu.s, viridig
vi'l ex viriili chalvlH-us, facie pilo;-.;!,, aliii) iuiiiiaeulatis, anteiioro ven;o
l()ii|.'itu<linalis 4uartif raiiiulo aicuatiiii ducto, haltt-rihiis tiavis.

1j . .Al.doiiiiiie lil^ciis nigris an^u.»ti.-s ornalo et in a|(ic'H |iilis .solito jiaulo
Idngicinliiis vi'stito, ffnnirilius nigris, viridiuiicantihus, siininio ffniorum
ant^rioruin aj)ict! tiliiisiine oninihuH llavis, tibiaruni ixtsticaruin apiie
tart<iM(|nH nninllnis e.\ fusio iiijiris, i)rinio tanien tarsdruin anticoruui
artitul" llavo, calrare tihiaruui inttfruiediaruni longissiuio, priuut tarso-
runi inturnit'ilioruni articulo setulis inciuvis sualiro.

9. Fasuiis al>d(iniinalilins niu'ris nnllis, <.-nxis anticis, feinorilms tiliii.«iiue
onniihus tiavis, e.vtremo tihiarnni postioaruin apice tarsis<jue uniniliun
ex fiisco nigris, has! tanien tarsoruni antcriornni tlavH.

Small, Very shining, green or greenish-lilne ; face liairy ; wings without
jiicture, the anterior branch » r the fourth longitudinal vein arch-like ;
halteres yellow.

% . Abdomen with narrow black )ands, at the tip with a soniewl at sliorter
pubescence than usual ; fcjnora black, with a green lustre, the extreme
tip of the four a.iterior femora and ;<11 tibiae yellow, the tip of the hinil
tibi:e and all tarsi brownish-black, still the first joint of the fore tar>i
yellow, the spur of the midille tiliifc extremely long ; tlie first joint of
the mi<lille tarsi rasp-like. Wing iieset with crooked bristles.

9. Abilomen without black hands; fore coxie. all femora and all tibiae
yellow ; the extreme tip of the hind tibia; and all tarsi brownish-bl;ick>
still the basis of the fore and middle tarsi yellow. Long. corp. 0.15 —
U.IG. Long. al. 0.15.— 0.16.

Syn. PsilnpHS scobinator LoKW, Neue Beitr. VIII, 91, 9.

Male. Ilaiulsonie shining, frrecn, sometimes pnrtly stcel-bluc.
I'iilpi hhick ; i»r(»l)osois browiiish-yellow. Faoe with a loiif^ whitish
j>iil»fS('i'iiee and not very ch)sely dusted with white. The second
joint of the antennie witli moderately \o\\^ bristles; the arista
itself only of the usual length. The delicate scattered pul)escence
of the fr((nt generally yellowish, more seldom whitish; the usual
black bristles upon the ocellar tubercle and in the upper eye-
corner rather long. The bristles upon thora.x and scutellum are
also rather long. The hind part of the abdomen is more ))ointed
in the shape of a cone than in most of the other species ; the black
bands at ♦he basis of tlie segments of the abdomen are narrow,
broader only upon the segments. The short |»ubescence of tho
abdomen is black; upon the first segment, as alsl) on the anterior
part of the lateral margin and on the greater part of the venter it is

i^'.

V.

rsiLorirs.

2<;9

wliitish; the 1)lack hristk's l)ofurc tlie iiicisurps niT not rriiiiP'kalily
lt)ii]Lr ; the l)ri.stle-like hairs ul tiie cxtrt'im' tip of tin- alKloiiuii ave
mtlior loii^. The small liy[)o|»\ jrium is hiack, wiili extrcinciy
small lihick ni>iK'ii(la}r("<. Coxa- Ithick, dustfd with white, the ibre-
niost with a white pulK'sceiiee and a (t'W i)liick bristles. FeiiKini
Itlaek with a preen relleetioii ; the anterior ones lijiht yellow at the
extreme tip; upon the under side of all there is a delicate, ereet,
rather sparse |)ul»eseenee of niediuju length. 'I'iltiie yllow ; the
hindmost colored with hlackish-hrown to a rather consideralile
extent at the tip. Fore tihite upon the upper side with al)out four
short hhick, minute bristles, upon the iiind side with about six still
shorter ones. Middle tibiie upon the first half of the hind side
with three not very lonjr black bristles; a perceptibly longer biis-
tle is to be found upon the first (piarter of the front side, another
near its end ; innncdiately before the end on the under side an
unusually long, straight, «liverging, black bristle assumes the shajte
of a rather striking s))ur of the tibia. On the hind tibiie, besides
the black bristles inserted at the tip, there is but one bristle de-
serving to be noticed, upon the first third of the outside. Fore
tarsi slender, somewhat longer than the tibia^; their lirst joint
yellow, only at the extreme tii> brownish-black, nearly once and a
half the length of the following taken together ; the latter are
brownish-black; from the second to the fourth of rapidly decreasiiig
length, the fifth as long as the fourth. There are no bristles nor
any unusual i)ul)escence on the fore tarsi. Middle tarsi brcwnish-
J>lack, considerably shorter than the tiJtia^; their first joint nbout
once and a (piarter the length of the following taken together. Its
whole length upon the under side fringed ras])-like with short idack
bristles, crooked downwards, and inserted in a rov.- on both sides;
the four following joints of decreasing length. Hind tarsi lilack,
hardly two thirds of the length of the tibia>; their first joint little
longer than the following taken together; the second to fourth
joint of rapidly decreasing length ; the two last joints of an e(pial
length, somewhat flattened. TIalteres yellowish with blackish
])edunele ; tcguhr with l»lack cilia. Wings hya'ine with bla'-k
veins ; the end of the first longitudinal vein is a c((nsideral)le dis-
tance before the middle of the wing . the anterior branch of the
fourth longitudinal vein diverges from it at an angle which is vr-ry
nearly a right oiie, and turns then arch-like towards the margin,
which it reaches rather far before the apex, (piite near the tip of

W.

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i

Ml'TKUA OK NdUTII AMKIUCA.

[PAir;

the third lonyitiidiiial vein ; liiixl truiifversc VL-iii iiiidcriitcly nli-
litiitf ami iii'iiri}' slniiglil.

I-'rmalr. Kacu soiaewliat broader tliaii in tlie J*. All liristii s
|K'rct'i>iil)ly sliurkr. Abdoiiiuii, in the usual posiUDii of iliu r-f^--
uieiits, wiihuMl IjlacU hands. Fore e<ixu; yellow, at the exinine
liasis ol'teu eol')red with gray ; their while i>ul)esceiiee uiucii

■>U>)

rter and the hhu-k bristle:

more

sirik

in<

the I

enima

aliogeiher yellow, I'ring'ed upon the under ssitle with but very siiuri,
ereel, whitish hairs. Til)iiu (juile yellow, the lundniost somewhat
inliiseated only at the extreme tip. 'I'he l)rislies of tiie tibise are
(jiiile like those of the ^, still .some of the bristles are missing, nr
at least shorter. Tarsi plain, somewhat shorter than in the ^ ;
the lirst joint of the middle tarsi bntwnish-yellow, up(»n tiie mukv
side with but a few very short blaek l)ristles.

JIah. yii'W York, Illinois. (OslenSacken.)

Olfin'rration 1. — With J', xcuhinatnr Itegins a series of vcrv
closely resembling species, which agree in a remarkalde nunint r
not only in size antl coloring, but also in the nmjorily of the
jdastic characters. The structure of' the middle feet in the J*
shows dilVerences, which leave no doul)t as to their specilic d

!.■>-

tincUies.s. I he distnietion of their icmales (jjiers such diirKiil-
ties, that I am unal>le to overcome them with the materials at my
commantl. I have received 1'. xi-olniKitur in so large nunilu rs,
that the 9 belonging to this species is surely al)undantly ri'pre-
sented among them ; but whether I have not confounded with it
feuniies of the three following species, I am not al»le to nil.
Some of the females, I suspect, belong to 1'. i-aiidd/iihix, i>tliers
niav be I', incniiii:, but I am not nositivi'lv certain al»out anv mm
of them. Positive characters for the distinction of the females
of these species ca'.i only be accjuired by the observation of tlio
s]»ecies in life.

Ol).<rrr'i/ion 2. — There is no doul)t that 7*. femoral

iiti

belongs to the present group. Whether it is one of the species
known to me, and which of them, 1 cannot decide, as Say docs
not mention any of those plastic characters by which alone they
can be distinguished, and as the J* specimen sent by Say to
Wiedeman has not been preserved in the collection of the latter.

PSII.OITS.

•> I 1

13. P. caildatlllllH Lukw. \,. — r.-iivus, iiiticliHsimas, viri.lis vd
ex viritli cli.'ilybfus, facie pilosii, aliH iinniacultitix, aiiteriore Vfiiii' loiigi-
tniliiialis ijiiartip rainiilo arcuatiiu <lu<:to, liulterilxis tlavi.t,

%. AMoui'MW. fasciis iiigris angustis oriiato ft in apice jiilis solito iiiuI'k
loiigioiilms veHtito, feiiioiiburt iiii^ris, virjiliiiiicaiitihiis, sumiiii> f.-iiHiriiiu
anterioruiii a|>ifo tiliiis<iiiti niiiiiilnis llavis, apice tihiarniit iKi>tii'ai-ii!ii
tarsis(jiie oiiiiiilnis t'x ftisco iiiirri.i, tais(!rinii aiitfriorum basi taintii
llava. calcare tihiarutn iiiterinediarnm Idinisniino, priuio tarsoiuiu iiiter-
lueiiiurum articulu sutulia inuurvia licat :u.

9

Suiall, vtry sliininfr, gn'en or bluish-Kreen ; face liairy ; wines uitlidiit
picture; the aiiteri'ir brancli of tlie fourtli loiigitiulinul vein ai'cii*<(l ;
lialtere.s yelbiw.

%. Abiiiinien with narrciw black bands, at tlie tip with much loncer liairs
than usual, femora black, witli a greenish retlet^tion, the extreme tip of the
four anterior femora, and all tibije yellow ; the tipof the hind tibi.-e, and
all tarsi brownish-black ; still the lirsf joint of the fore tarsi yt-lluw, the
spur of the middle tibias very long ; first joint of the miildle tar^i
beset witli crooked bristles, rasp-like.

9 Long. corp. 0.15. Long. al. 0.15.

/5y.v. I'sihipus cinutatulua LoKW, Neue Beitr. VIII, \Ki, 12.

It rosi'iiilil'S the 7*. sfohinafor so much, that the statement of
he slijrlit diirereiioes will lie perfectly suHicleiit for its rccou'iiition ;
the liairs at the tip of the alKlomeii are much lon<rer, umre liristle-
like, and when well preserved, are of the same length as the four
hist sefrnients of the al)domen, whilst iu P. si-fihhi(iti>r, the two
which are longest among them are Itut little longer than the la^t
segment.

Ifah. Missouri. (Schaum.) Illinois. (Le IJaron.)
Ohxi'rrnlion. — The name w'iiirh I have given to this s])ccies is
intended to retnind of P. cniKlntiiH Wied., which uinlonljtedlr
belongs to the saiiK.' grouj) ; but. 1)\' its larger size, it seems to
be dilferent from the species known to me. In the AV'/r /iri/riii/r,
in consecpience of a mistake, some incorrect statements have
been made by me al)out I\ cniiihitulim. Its rcseiiildance with
P. scobinnlor is so great that one would be very much inclined to
take it for a mere variety of it. if the ditVcreiicc in the length nf
the hairs at the tip of the abdomen was not so coiisideralile, ami
if the distinction of the other sjtecies of this group, otherwi>e
agreeing perfectly in all characters, did not likewise rest on some
single plastic character.

w

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* ■\' i

: '. ■ *

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m

O-'l

Dll'TEIlA OF N(tKTIC AMIHUCA.

ri'AUT II

} li

M. i

I,

13. I*, en lea rat II H Loi:w. %. — Parvus, nitidisHiimis, viiiilU vd vx
viridi cliiil^'licus, fauie pilosA,, nli.s iiiiiiiaoiilatiH, anlfrioru vuiiiu ioiigitu-
(liiialis (jtiartie ruiiiulo an^uatiiii duulo, huittiiibu!) tlavia.

^. Aliiloiiiii^u fanciiM iii^riH aiigiistis oriiato, ffiiioriliua iiigri.s, viridi-
iiii(-aiit'i)U.s, suinmo feiiioruiu antfiiorum apicH til)iis(|iiu oiiiiiiliiis tint is,
tiliiarum postiitaruni apice taisis.juu oinnilius ex fu.sco iiigris, priiiio
taiiitM) tarsorum aiiticoruiii artii'iilo llavu, calcaru tiliiarum iiitfinii^dia-
ruui loiigi.ssiuio, piimo tarsioruni iuturiuediorum artiuulo 8iui]>liui.

9

f^iiiall, very sliiuiiii;, grt'cn or grt'enish-blne ; faow hairy; wings witliout
liii'tui't^ tliu aiiturior braiiuh of tliu fourtli luiigitudinal veiu arched;
ha'. teres ytillow,

%. Alidonieu with narrow hlaek hamls ; femora Mack, with a greenish
lustre, the extreme tip of tlie four anterior femora and all til)iie yellow ;
the tip of the hind tilii.-e and all tarsi hrownisii-hlaek ; still the first
joint of the fore tarsi yellow ; tlie spur of tiie middle tibije extremely
long ; the lirst joint of the middle tarsi plain.

5 Long. Corp. M.l.'i. Long. al. O.l.'i.

yv.v. rsil(>iiHs ciilraratiis LoEW, Neue Beitr. VIII, 93, 10.

I am unabhj to luontion any (linVrcMK'O from the male of the
P. Kctihitwior, except that the middle tarsi are somewhat longer,
namely, as lou};; as the til)ia!, and that their first joint ui>(»n the
under side is not frinjred rasp-like, with numerous, crooked bristles,
but has oidy a few scattered siraijrht bristles.

JIab. Carolina. (Zimmenuaini.)

14. P. inerniis Lokw. % . — Parvus, nitidissimus, viridis vel ex viridi
chalyheus, facie pilos^, alis immaculatis, anteriore veujp longitudinalia
cjuart.TB ramulo arcuatim ducto, halterihus llavia.

^ . Abdomine fasciis nigris anjiustis ornate et in apice pilia solito longiori-
bus nuUis vestito, femoribua nigris, viridi-micantibus, summo femorum
anteriorum apice tiliiis<ine omnibus flavis, apice tibiarum posticarum
extremo tarsisque onniibus ex fusco nigris, tarsornin anteriorum basi
tamen flavil, calcare tibiarum intermediarum breviasimo, primo tarsorum
interniediorum articulo simplici.

9

Small, very shining, green or bluish-greeii, face hairy ; wings withont
pictur>3, the anterior branch of the fourth longitudinal vein arched :
halteres yellow.

^ . AVxlomen with narrow black bands, at the tip withont liairs longer
than usual ; femora black, with greenish lustre, the extreme tip of the
four anterior femora and all tibire yellow, the extreme tip of the hind
tibiae and all tarsi brownish-black, still the basis of the fore and middle

rsii.oiM's.

tarsi yellow ; tlu- spur of the uiidille tihi.f very .short ; tho llr.st joint of
tint luiiiillH tursi ]ilain.
9 Loiii?. Corp. 0.1 f). Long. al. 0.15.

Sy.v. ]\siloj)its liurmls Lokw, Neuo Ueitr. VIII, 'J3, 11.

TIlis Specie i is lii<e\visc most elusely allied to the ^^ of /'.
8cr,hiiui(ur. Ill tlu' eoioriii}; there are no <lill'erenees, exeept liiat
ill 7'. iiwrmiti tlie iiiiul tiliiie are somewhat inruscatetl at the very
extreme tip, while in the ^^ of Hcobinatur tlie l)laekisii-lirowii
coloriiijr is e.xteiide*! nearly over tiie whole of their last (piarter,
and tiiat in inermii^ the first joint of tlie middle larsi is hrownish-
vellow nearly to the miildle. AVhelher these ditVereiiees in the
tolorini? are eoiistant, further observations must show. The plas-
tic dill'erences, which secure the specific distinctness of incnuin
from the two ]>revious species lies in the strnclnre of the middio
feet. Whilst in the latter that lirisile, which is inserted near the
tij) of the tibiiu upon the inner side, forms an nnnsnally lon<r,
<livei'giiijr spur, and much exceeds in len<rth the hristle inserted
on the front side of the tip, in J*, inrrwiii the hristlt; inserted on
the inner side is not only the much smaller one, Init is also not
diverjriiif^ ; the reinainiiijr bristles of the middle tibise are onsider-
al)ly loiif^er than in scobinalor nud calrarulua ; the lirst joint of
the middle tarsi is ]>lain, as in va learnt ui^, but lias upon its under
side a still smaller number of very short, straight bristles ; the foro
and middle tarsi are somewhat lonp:er than in the two previous
species, still tliis dilferencc is but trilling'.

Hub. Pennsylvania. (Osten-Sackeii.)

M-f'-'

m

-''3-

Ht

II. Tegul.t; -vvitii pale ciua.
A. Aitlcnnoe entirely blaik.

15. P. scintillaiiH Lokw. % and 9 . — Totu.s nitidissimus, virldis
vel ex viridi chalyheus, alidotuiiir interdum ex aurt'o viridi, anteunis
nigris, coxis anticis jiedihusiiue llavis.

%. Alarum costa breviter ciliata, hypopygii appendicibus atris.

(■ Alarum costa noii ciliatd.

Very shining, green or bluish-green, abdomen sometimes golden-greeu;

antenme black ; fore ooxa? and all the fe"t yellow.
% . Costa with short cilia ; appeinlages of the hypopygiuiu black.
9. Costa not ciliated. Long. corp. 0.14— o.ltj. Long. al. O.l'i — 0.17.

Sy.\. Psilopus scintillans Loew, Neue Beitr. VIII, 94, 115.
18

.

!

:■[

1:1

274

Dtl'TKKA OF NltUTII AMKUK'A

[I'AllT ir.

a

H
f I

■)■■
a .1

Jf(flc. Very ImiHlsiMncly sliiiiiiijr, ^rccii, the aldloiiicn, exccpt-
iiiu; the two last sojjiiu'iits, g-ikli'tl. I'rolioscis diiijry yellow, (he
Kiiiall ]m]\n black, wilii white hairs. Vnvv. without hairs, dusted
with white. Antenua; entirely Idaek. kuuiII ; the se(!oiid joint
with short, minute bristles; the arista itselt" of only moderate
lenj.';tli. l''ront with the usual black bristles, Avhieh have but a
incjderatc l»:'}fth, otherwise bare. IJristles upon seutelluni and
thora.x of moderate length; upon the latter there are only two
bristles. The; black hairs of the abdomen are very scattered, and

tl

le black Iiristles

bef(

'ore its incisures are rather short. The small

hypopyjrium is black ; its external appendajres are very narrow,
black, and with black hairs. Fore coxie pale-yellow, with
scattered and rather sh«)rt whitish hairs, and beset with several
white bristles. Middle and hind coxiu black, i'eet very Ion;;
and slender, i)aIe-yellow. Femora slender, upon the under side
sparely frinj^fd with short, minute, whitish hairs. Tibije likewise
very slender, without bristles, with a very short Idack i»ubeseence,
which is diver<iMn<!^ fring'e-like on the middle tiliise and is much
closer upon their under side. Fore tarsi extit'Uiely slemler, more
than once and two-thirds the lenjrth of the tibiie; their first joint
alone .'somewhat lonjfcr than the tibiie, brownish-yellow ; the follow-
ing joints brownish-l)lack and of decreasinj^ lenji^lh. Middle tarsi
likewise very slender, about once and u half the len<^th of tli-
tibiiu ; their short black jndiescence diverjfinjr, so t'.iat it appears
fring'C-iike ; their first joint brownish-yellow, at the extreme tip
brownish-black ; the fidlowinjif joints brownish-black and of de-
creasiiiji^ leuf^th. llintl tarsi nearly as long as the tibite; first joint
brownish-yellow, and but little lontrer than the following joints
taken together; the latter brownish-lilack and of decreasing length.
All the tarsi entirely without bristles. Ilaltercs pale-ycUow with a
blackish peduncle; teguhe blackish with whitish cilia. AVingson
the anterior margin, from their basis to the tip of the second longi-
tudinal vein, regularly ciliated with rather stout, minute, black
hairs; the third longitudinal vein rather distinctly curved hack-
wards at its end ; the anterior branch of the fourth longitudinal
vein diverges from it at a neai-ly right angle and turns then at a
very rounded, somewhat obtuse angle towards the margin, which
it reaches very near before the apex and n^; far from the tip of
the third longitudinal vein; posterior transverse vein rather
oblique and somewhat inflected.

rsii.ui'i-.s.

21»

Fcinnlr. Tt rt'sciiiblcs tin; iiial(! very inucli, still tlic pnbpsrence
nnd hristli's of tint IkmIv art; slidrltT, iilso llio aiitrrior iinirf^iii of
tlio wiiijjf is not <'il!atc(i. Tin.' dclicato, miniito white liairs upon
the utidcr si(l(! of tii(! femora are hardly iKTccptildc. Middle tihisu
Willi a liiiicli shorter, not diver<rin<]^ puhesceiire, but with a few
iiMimtc! hlaek bristles, which are not to l)e foniid in the ^ 'I'arsi
somewhat shorter, otherwise of a sinnhir strnetnre, still the middh;
tarsi only with a «|uite short, not diverffinfr piilx'seenee, and the
first joint of thi' hind tarsi fully as lonfr as the four following
joints taken tojrether. Teiruhe sometimes rather yellowish.

JJab. -Middle States. (Osten-Saeken.)

B. 77(C Iwnjirsf Joints of Iho (inlrnmr jtale.

A. Fore ft-mora in hulk sires, or at least in the vhiJc, witlioiit yrllow tfinrnfikf.
hi-isll( s iijion the under slilt'.

1. Abilouieii not yellow at the basis.

16. P. palleilH WiKD. 1 and 9. — Kx viridi cinert-ns, opapus, pro
bosciiltf, palpirt, iluobus priniis anteniiarum articulis, ventre, coxis jiedi-
basque tlavis, coxis posti^rioribus fiiscii-niaciilatif'.

^. Tarsorum antiooruru articmlo (luarto subdilatato, alltido.

5. Infero femoruin anticorum latere setis validis flavis annato.

Oreenisli-gray, witlioiit lustre, balterps, palpi, tlie two first joints of the
antenna!, the venter, the coxa*, and the feet yellow, the four jiotiterior
coxie spotted with l)rown.

% . The fourth joint of the fore tarsi sliehtly enlarged, whitinh.

5. Under side of the fore femora bearing stout yellow bristles. Long.
Corp. 0 23— 0.2G. Long. al. 0.22—0.24.

Sin. Psilopus paUe.ns Wiedemann, Auss. Zweitl. II, 219, 11.
Psihiftiis iiUioiiotntiis LoEw, Neiie Heitr. V, 4.
Psilopus pitlhns Loew, Neue Beitr. VIII, 97, 17.

Male. Everywhere closely covered with a grayish or whitish-
jrray dust, from below which the metallic bluish-<rreen ground shines
distinctly, although not strongly, through. Proboscis brown ;
palpi whitish-yellow. Face broad, without hairs, very cloficly
covered with white dust. The two first joints of the antenna3
yellowish, the second beset with very short minute black bristles :
third antennal joint brown, rounded ; arista proportionally short.
Front with a close white, round the f)cellar riil)ercle with brownish-
gray, dust, without hairs, the usual black bristles upon it of uiedium

III

U"'

^t\'

m

M'

m

!J^ ;!;

J7fl

DIITFUA OF NOUTII AMKUICA.

[I'AUT II

h

h

!■ I*

Icti^tli. Tltt> n|»ii(|iK> tliDi'ux, (lusttMl with ^I'liyisli, has two Iwn^i-
tii*liiml liiu's, distant IVoiii nich otlicr (i|m)ii the iiii(l<lh>, iiml iwu
other iiic()iii|ilfli' inii^,-itii(liiiiil iiiirs nt' a lirowii nthtr, ucciiiiyiii};
ihu place ol' the hiteral stripes. iJristies of the tliorax pntporiinti-
iiily short, Sciitelhim with two bristles. 'I'lie aluloiiieii, »iii>ieil
willi grayish and rather opaipie, Inis upon tlie seeond se^rmrnt u
hu'fre liiaekisii, triaii^idar spot, with its point directed hackwanU ;
upon eacli of the t'oiiowing segments tlu>re is a siniihir spot, which
is connected witii tiie rather narrow Itiaciv anterior nnir^in of the
scffnient, and the cohir of wiiich is ciianfrinjf from a dusivy-lironzcs
into frrayisii-^rrcen. The structure of the hypopygium and of its
appenda;ji:es is nearly as in J'. alhij'rini.< Meij;'. ; the external
appenda;:'es are hardly half so long as the inner ones and ha\(>
the form of a small elliptical lamella: their color is brown, their
pubescence near the basis more delicatif, shorter and pale, at the
tip coarser, hmj^er, and black; the inner appeialajres form a
brownish-yellow forceps, (lark-l)rown at the tip. (Vtxa' and feet
yellowish, still the middle and hind coxtu rather broadly infuscaled.
Fore coxiu beset only with u delicate, nioilerutely lonjr, yellowish-
white pubescence, without stouter bristles. All femora slender,
upon tlie under side very glabrous ; the I'vw pale hairs which are
to be found there are extremely short, and tlierefore hardly pcr-
ceptil)le. Pubescence of all the til)iiu very short, that of the
middle tibiiu somewhat h)iiger uiid more diverging. F(»re tiliiie
upon the upper side with a few slender minute bristles, one of
which is inserted at their tip. Middle tibitf generally iidnscated
upon the two hist thirds of tlieir upper side; upon their ante-
rior side, not fur from the basis, a more i)erceptil)le small black
bristle is inserted; otherwise tliey are without bristles. Hind
til)i.e with a few very sumll bristles at the tip, otherwise ns good
as without bristles. Fore tarsi slender, double the length of the
tibiio ; their first joint somewhat longer than the til)ia; the three
following joints of nearly the same length; the fourth joint some-
what flattened from the sides, whitish ; fifth joint only about half
as long as the fourth, dark-brown. Mi<ldle tarsi once and a half
the length of the tibiie, slender; the first joint distinctly longer
than the following taken together ; the latter of a decreasing
length, the last one infuscated. Hind tarsi somewhat shorter
than the tibiie, their first joint distinctly shorter than the second,
the last one somewhat infuscated. Ilalteres yellowish ; teguhu with

V

n ?i

rsii.ons.

niTiiw liliick 1iMnl<'r iiinl vrl|(i\vi>li-wlilt(' cillu. Wiiiir< ru'liir

Iiirirc, 111' nil <'lli|itiriil niiiliiic, tiiiji'i'd wiili limwiiiNli-jriiiv ; tlif iliinl
lnii<riliiiliii!il vi'iii is Init littlr ciirvcil l)ii<k\V!irils nt tin* ciiil ; tlio
iiiiti rior iirnin'li ortlir I'niirtli liiii<riliuliiiiil vriii, llir nri.jii- nf wliicli
lii's iM'iin-r til the i»nsirriMr iriiiisvcrsc vt-iii tliaii tn 'In- iiiiirj/iii nf

iIh' wiiil'", Ifiivcs tins vein tit nil itldiist' iiiiiiM'. iiiid turns ,11 n Ihit
curve luwanls tin* innruiii, wliicli it rcnclics n little helure .lienpex
mill imt I'tir IVmiii tin; tip of the tliini Iniiu'ituiliiiiil vein ; tlie |>ii<.te-
rinr triiii>verM' vein lies iirupitrtiuiiiillv I'jir iiwnv from the niarniii,
is iiiit liiuiiei'iiteiy )ii)li(|iie ami not ilitleeted.

Fiiiiiili'. It resemliles tiie (^ veiT liliir-Il, )iut shows the rnlhiw-
iiiir (lilVereiiees : The eitlor of the (hist iiiiitii jioiit, thorax, siiiti!-
liiiii ami alHloiiieii is more yeihtw-jrrayish. The IdaeKi.^li, triaiijiii-
lar <lor>al spots of llif aliilomeu are imli>liiiet. 'I'lie Inre eo.\n!
have, besides the yellowi>li-\vhitc plllieseeiiee, on the iiiliei' and
outer maru'in. as also at the tip, iiiimeroiis yellow lirislles. Feet
shorter and of stouter struetiire than in the ^. I'piui the liiM
lialt' of the under side of the fore femora there are live diverjiiiii;
stout thorndike hristh'S of veijow color. All the tiliia- are siiardv
heset with siiitrle Itlack Itristlcs of medium leiitith. Tar,-i di.--
tiuctly sliorter than in tiie ^ , from the third Joint iiifii>catcd,
the last joint dark l»rown, the sec(Uid to fourth joints of the lorn
tarsi decreasiiiL' in leiijrth more rapidly than in the ^ . W"\\\y[<.
somewliat smaller and less ohtiise than tliose of the j^ ; tke iieiira-
tioii does not show any jicrceptilile dilfereiice.

J[iih. New York. (Osteii-Sackcn, wlio found it frerpieiitly in
fTiiiie !>ii(l .Inly in tiie iMiildinu's near tlie Howiinjr (Jreeii and the
IJattery, 011 walls and windows in tiie rooms.)

()l).<rrriilii») I. — Tlie ju'esciit species is not only an eiitirelv
Kiirojiean form, liiit also witliout tiie least doiilit jierfectly identi-
cal with /'. (ilhdiintdliis, which I iiavc discovered at IJliodiis and
descrilied in " AV"«' //'///•. V." Tiie comparison of two ^ of the
latter witii several ^ of /'. jiallois shows, that tii 're is no pcr-
ceptilile ditVereiice lietweeii tlieiii.

Olmrrni/inn '2. — At the Imperial Miisouiu in Vienna there are
two specimens of /', jialhun marked "New Holland." Tiic
simultaneous- existence of tiie sjiecie."'' in North America and
Kui'ope niij:lit had to liclieve in tiie iiossiliilily of its also occiir-
riiiir in New Holland. However, my reasons for doiihtin^- tiiis at
present are as follows : tiic pins ijoaring these specimens are easily

i <\',

t

K

m

t

I" )

i-:

TT

27S

niPTKIlA <>V NdUTir AMKUICA.

[I'AKT 11

(listiii^ruislicd from others, itti<l amonj; all tin* (tthcr DnfiihoimtliJie
of llic collection, there are only two Kpeeiniens on Hiniilar pins, and
Itoth are also marked " Xew Holland." A most careful compa-
rison of the latter specimens showed that they are /', m/iho Say.
This circumstance renders it very probalile that thoro was a nds-
tako in the btatement uf Ihu hahitut.

II

mi; >

2. Abdomen at tlio basis yellow, not roetallio.

a, Taiai for the moHt part black.

It. P. VnriPRatllH Lokw. 9.— Viridi, clialybeo et onprco varhis,
iiindiet) nitens, iticlxwiido, palpis, i)riMiis duobua ant»innainin articulis,
al)d<miinis basi, veiitr*! pt'dil)u«(iuo Uavis, coxifl iMtorm«cliis einoieo.
niaculatis, tarsis ex fuscu nigria,

Ore«n, Hteel-blue and eoppt-r colored, variegated, moderately shining; pro-
boscis, palpi, the two lirst joints of the antennip, the basis of tbe abdo-
men, tbo coxa- and feet yellow ; middle coxw spotted with gray ; tarsi
brownish-black. Long. corp. 0.21. Long. al. (».20.

Sy.v. P^ilojiiis vtiiirgittus LoEW, Neue Beitr. VIII, 95, 14.

(Jreen, the most jmrt of the upper side of the thorax and the
anterior i)art of the sinjjle sej^^ments of the al)domen copjtery-rcd,
tiie front and scutellum blue. The lustre of the f,'ronnd-eolor is
moderated by a slifrht whitish dust. Face prcciush-blue, closely
dust(!d with white, reaching more downwards than usual ; without
hairs. Proboscis and palpi yellow. The two first antennal joints
yellowish, the second with very short minute black bristles ; the
arista dorsal, moderately lonjjf. Front blue, slightly dusted with
white, without hairs ; its usual black bristles of a moderate
length. The upper side of the thorax shows two longitudinal
lines of a coppery-red color, which are separated by a broad green
stripe; each of them coalesces with a large coppery-red lateral
s|)ot ; the ui)per side of the thorax is very probably not so
variegated in all specimens. The black bristles of the thorax of
medium length. Scutellum blue with a green tip ; the pair of
bristles inserted near its tip is rather large, that nearer to the
basis is more slender and much shorter. Pleura; rather closely
dusted with white ; their hind margin colored with yellow. The
first segment of the al)domen yellow, near the basis blackish, on
the hind nmrgin, excepting the middle, metallic-green and fringed
with a row of long black bristles j the basal third of the second

1'S1|,(»1'IS.

scjfmont niul <ni i-ndi siiU; u laitTuI spot, yellow ; olIuTwisc, tliu
alMloiiicri is nictiillic-^''i'L'i'ii, iit tin- l)ii.sis of tli*< sr^iiu'iits liunilsoiiiii
(•op|i».'ry-r('(|, jiltujicllicr « ovcrcd willi ii >li);lit \vliili>li (lu>|. 'I'lit!
|)iilios(.-i-iict' of tli(.> lii'st sr^rijD.iit ,,\' tlic ii ImIomd'Ii is wliitisli uml
(k'licatc, upon tlif rciiiiiiiiiiiv^ ><'^'iiit'iil.s it is cournrr iiiid lilar|{ ; tlii;
iniiiiitc Itlack ItristJcs licfnrL' tlie m'coikI aii<l licforc llic fnliowiiij^
si'friMcnls (litfcr Imt little from the rcniaiiiiiif,' piilx'scciicc. Vvu-
tor j'ollow, with a very scaltoivd ami short piiht'sj-i'iirc, wliirli has
near its )msis iv whitish, towards its end u lilack color. Korc
coxiu yidlow with a rather short whitish pnlH'seeiiec and with u few
stout whitisli-yell(»w liristles. Middio and hind coXiu likewise yel-
low, still the lirst with a jjray spot, whieh covers the lar^'er part
of its outside. Femora y(dlow, upon the under side with a hardly
disliiit't whitish pulteseence ; the foremost with a sinjrle Idack
bristle inserted upon the (tutside not far from the basis. The
middle tibiie liav ' a more distinct minute iiristle upon tlit; frotit
side near the basis and a i'vw at the ti|», besides some snndl ones
upon the hind side; the hind tiltiiu have upon the front side, not
far from the basis, also one stout l)ristle and some ipiite s.nall,
hardly percei)tible ones u)»ou the upper and under side. Fore
tarsi aljout once and two-thirds the leii^rih of the til)ia'; their lirst
joint alone of tlie same lenjjth as the til»ia', bnnvnish-yellow ; the
following joints browidsh-black and of decreasing length, still the
third but little shorter than the second. Middle tarsi once and
a-half the length of the tibiiu, of the same C(doring and structure,
only the first joint iiroportionally somewhat .shorter. Hind tarsi
but little shorter than the til»ia', brownish-black, at tht( ba.-is niori;
yellowish-brown, the first joint not (piite as long as the second and
third taken together, llalteres yellowish; tt'guhe with a very
narrow black border and whitish cilia. 'I'he third longitinlinal
vein of the wings distinctly curved l)ackwards near its end ; the
anterior branch of the fourth longitudinal vein diverges iit a rather
acute angle and turns then at a very rounded right angle towards
the margin, which it reaches somewhat before the ape.\ near the
tip of the third longitudinal vein ; hind transverse vein strikingly
oblique, not sinuated.

Hub. Florida. (Ostcn-Saoken.) Cuba. ((Jundlach.)
ObHcrvatinn. — /'. vnricijatus is very like the 9 of P. i»tiffn-
cinitit. The proportionally huiger wings, the dirt'erent position
of the bristles of the scutellum, the much darker coloring of the

rti.

■:iii'

L r

'1 .1

■ :.'-■

2S0

DIPTERA OF NOIlTir AMKKICA.

[PAUT II.

H

tiirsi and llic in'oportioimlly sciiicwliat lesser leiij^th of llie (irst
joint of (he liiiid Uirsi seem to prove its distiriotiiess sufliciently.

; If

f 1?

li. Tarsi but littlo iiifuscated towards tlio end.

a. All the coxa' uiitirely y«llow.

IS. P. l»i€"Olor liOK.w. 9- — Viridis, iiitidissiinus, proliospido, paljiis,
dtioiiiis priiiiis anttMiiiuruni articulis, abdominis ba^i et mauulis laterali-
bus, vcntri', coxis ii<'(lil)us(iuo llavis.

(Jn-cn, v<'iy sliining; ])rol)oscis, palpi, the two first joints of tlie antenna-,
the basis of the abdoinen and spots on its si<le, venter, coxa) and feet
yellow, bong. eorp. 0.1:5 — 0.14. bong. al. 0.115 — 0.14.

Svx. J'silii])ii!i hicdior boKW, Neue Keitr. VIII, !)(!, 15.

(Jreen, very shiiiintr. I'iilpi and proljoseis yellow. The <rhi-
itrons face and the front l»inish-fi;reen, the former rather eiosely
dusted with wiiite. Ihe latter with (he tisiia! liiaeU l)ris(les, whieii
have hnt an insiiinirieant lenudi, otherwise without puheseenee.
'Pile two lirst joints of (he antennse yellowish; the second with
only extremely short niiiude Idack hairs. The black hrisdes of
(he (liorax short. Scidelluin wi(h only ('vo loii;>; black brisdes.
Pleura' closely dusted with wlii(e, (heir hind marfiin yellow. First
se<i'men( of (he abdomen yellow, with a shininji- <>;reeii hind mar-
gin ; (he second seti'inent likewise; yellow, with Ji very lar,ti-e nn'tallic-
H-reen spot, which only leaves unoccnpied (he basal one-(hinl, \\w,
anterior corner and the lateral maririn ; \\\v two following seu-
ineiits ship.ing green, with a yellow anterior corner and yellow
hUeral nmrgiit ; (he lil'th segment oidy with a yellow hUeral nnir-
gin. A'enter entirely yellow. IMie ]MiI)eHcenee of (he abddmen
is scarce, delicate and shor(. upon its npper side black ; (he minnie
l)lack bristles before (he incisures arc so short that they distinguish
themselves but litde from the renuiining pubescence. All (he coxa'
and the very glabrous, huig and slender fee( pale yellowish. Fore
coxa' with a shor( whidsh pubescence and wi(h a few hair-like
whitish l)ristles. Vuder side of the fore femora with ex(remely
shor( minide whitish hairs, under side of the mi«hlle and hind
femora glabrous. Fore lil)ia! entirely without brisdes; middle
and hind (il)ia' wi(h o\w short niiuute black brisd-; upon (he ou(-
side, not far from (he basis and with some similar minule bris(le^^
at (he tip. Tin; very slemler fore tarsi over once and two-(liirils
the length of the tibiie ; their lirst joint a little longer tiiaii (he

PsiuiPt :s.

2H1

tiliia, the fnllowinjif JMiiits of n (Iccrcasinjy Iciiirtli, tlic liflli juiiit
intuscatcd. The slciidi'i* initlilU; tarsi nearly oiict' and a-lialf llie
Iciif^tli (tf tlio liltia'; tlicir lirst joint (iistiiictly sliorlcr tiian tlic
tii)ia; the folluwiiiir (incs of (Iccrcasiiij!: Iciijrili, tlic last ont' sitiiic-
wliat iiil'iiscatfd. Hind tarsi alxtut tlircf-loiirtlis tlic Icii^Mli of the
tiliiu' ; their first joint lonjrer than the followin}^ taken toirether;
these are of a decreasinj^ lenfrth, somewhat, infiiscated, still only
the hist is really lirown. The i)nl)eseeii(e of all the feel is of a
rather strikinji^ shortness ; its color npon the under side of the liliia!
and tarsi is not Mack, allhonfih they take IIk^ appearance of tids
color in some relleete(l liirht. Ilalteres pale-yellowish ; tejinhe with
an e.\cec(linj:ly narrow lilack horderand with yellowish-while cilia.
The third lonjritudinal vein of the winjrs curved jrently backwards
at its tip; the anterior branch of the fourth longitudinal vein
diverjjres from it under a rather acute an}ile and turns then al a
rounded rijilit aiifile towards the mart!:in, which it reaches ininie-
diately before the extreme apex, near the tip <jf the third lonjfi-
tu<linal vein ; the hind transverse vein very oblitpie, little inllected.
Hub. Middle .States. (Osten-8acken.)

u

f. 1

\. ■

■• )\ ■■ ■',

i

- ^»'

! ;/(■' .'j

w

) ■■ ■ ■ ■»

i :

■■\

B. Middle coxa; gray witli yellow tip.

If). P. pHittnc'iillls Li)i;\v. % and 9- — Aureo-viridis, >nodi(!t> nitens,
j)rot)()s(!id'', jialpis, diiolius inimis aiiteniiaruni articulis, abdominis liasi,
V('iitr(?, coxis aiitii'is i)osticis(iiH! et in'tlilms Ihivis, coxis interiut'diis cinc-
rei.s, in apico llavis.

^ . Alariuu costil eoncavil, bnn-iter (dliatil.

J. Alaruiu codta ni^c coiicavii, uea ciliata.

Golden-given, moderately shining, proboscis, palpi, the ♦wo first joints of
tlu! aiiteiin.T, the basis of the al)(b)nien, the venter, the fore and bind
coxjc, as also tbe feet, yellow ; the middle eox;e gray with yellow tip.

^. The ant(M'ior margin of tlie wings tieieave, with a fringe of sliort cilia.

9 . TIu! iiiiterior margin of the wings neither concave nor ciliated. Long.
Corp. (1.2(1—0.22. bong. al. O.IK— 0.2(t.

Syn. I'siloints jisitliicinns Loi-.v,-, Neue liiMtr. VIII, iKi, Id.

Mule. (lolden-grt en, moderately shiidnjr. I'robo.seis and palpi
yellow Face greenish-blne, closely dusted wiih yellowish-jfray,
reaching much downwards, with<iut hairs. The two first joints
of the antenn;c yellowish, the second with very short ndniiie black
bristles. The arista d(»rsal, moderately lon<^. Front blue or
bluish-green, with a grayish-yellow or nearly whitish dust, without

>. I]

,'■. t

1,
■ i'

iilSl

i'.'l

• Ml;'

1*1 s;

I!' i<

i ■:

289

DIPTEHA OP NORTH AMERICA.

[part II.

hairs, its usual black bristlos of a very moderate length. Thorax,
scutt'lluiii aiitl ul)(loineii with a slight yellowish dust, which
moderates the lustre of these parts. The Mack bristles of the
thorax of moderate length. The scutellum has only the pair of
bristles at the tip, which is of a consideral)le length ; immediately
near each bristle of this pair a much shorter black hair is inserted
towards the outside. Pleune black with a green reflection and with
a grayish-white dust ; their hind margin gray or at least only in
part yellowish. Abdomen green, towards its end generally some-
what gilded ; the fuvt segment yellowish, at its basis blackisli, on
the hind margin metallic-green; on the second segment the ante-
rior margin and corner, sometimes also the lateral margin, yellow;
the third segment has generally, on the anterior i)art of the lateral
margin, an elongated yellowish sjujt. The scattered ind)esceiice
of the abdomen is rather delicate and long ; ui)on the upper side
it is black, whitish only upon the first segment ; the pubescence
of the venter is whitish near its basis, but ))ecomes gradually
darker towards the end. The black bristles before the incisures
of the abdomen of a very moderate length. The external append-
ages of the hypopygium small and very narrow, brownish-yellow.
Fore and hind coxie pale yell()w, the former with a shorter and more
delicate whitish pubescence and with a few light-yellowish bris-
tles; middle coxte gray with pale-yellowish tip. Feet yellowish.
Femora slender, upon the under side si)arely fringed with i xceed-
ingly short, minute whitish hairs; besides, upon the second half
of the under side of the middle femora there is a sparse row of
minute b'ack hairs. Tibiie slender and long ; the usual black
pubescence of the fore and hind tibite is very short and appressed,
that of the middle tibia; somewhat longer and more erect, there-
fore almost fringe-like. The fore tibiie, with the oidy exception
of a rather small minute bi.ick bristle, inserted upon their outside,
near the basis, are entirely without bristles. The middle til)iie
bear no bristles whatever, distinguished from the other pubescence.
Iliad tibiaj upon the front side, not far from the basis, with a rather
apparent little bristle, whilst those upon the upper and under side
are less numerous, extremely small and therefore more difiTicult to
perceive. Fore tarsi slender, nearly twice as long as the tibial ;
their first joint for itself alone somewhat longer than the til)ia,
the following ones of decreasing length, the last one brown. !Mid-
dle tarsi slender, about once and a half the length of the tibia) ;

*n.\i:

psiLOPua.

tlie first joint distinctly shorter than tho tibia, upon its front sido
somewhat sparsely eiliated with ohlique minute black liairs ; the
followiii}^ joints only with the usual short pul)eseence and of de-
creasing length,* the last one dark brown. The length of the hind
tarsi somewhat exceeds three-fourths of the tibia' ; their first joint
is oidy somewhat longer than the following taken tugcther ; these
are of decreasing length, somewhat infuseated, still only the last
one dark brown. Ilalteres light yellow ; teguhu with extremely
narrow black margin and with yellowish-white cilia. Wings with
brown veins; the anterior nnirgin is gently sinnated upon its
larger second half, ami forms l)efore the tip of the second longitu-
dinal vein a i>rojecting angle, so that the whole wing ac(piires a
quite unusual axe-like shape ; the whole anterior margin, as far as
that angle, is delicately and eipuilly ciliated ; the third longitudinal
vein, near its end, is turned back very abruptly and un.isually far;
the anterior branch of the fourth longitudinal vein diverges from
it under a rather acute angle and turns then in a curve towards
the nnirgin, which it reaches not far from the tip of the third lon-
gitudinal vein ; posterior transverse vein rather remarkably oltlicpic,
gently sinuated in the shape of an S.

Female. It resembles the male very closely. besides the
lesser length of the bristles on the whole body, and besides the
somewhat lesser length of the feet, which are of the same color as
in the J*, there are only the following diflerences : the whole hind
margin of the pleura; is colv-red with yellow. The middle tibiiu
are without the longer and erect i)ul)esccnce of the^, but their
pubescence is short and appressed as on the other tili;e; there
are, however, upon the front side near the basis one, and at the tip
of the tibiaj a few more distinct minute black bristles, l)esides some
smaller ones upon the hind side. The anterior margin of the wings
is neither concave nor ciliated, the wings therefore of the usual
form ; the third longitudinal vein, near its end, is much less sud-
denly and much less strongly curved l)aekwards; the course of the
anterior branch of the fourth longitudinal vein is somewhat Icsa
in a curve, and the sinuosity of the hind transverse vein uot so
strong.

Eab. Florida. (Osten-S^.L. )

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284

Dll'TERA OF NOUTII AMEIUCA.

[PAIIT II.

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n. Fare femora upon the under stth with thornJike bristles in both sexes.

1. All the coxae entirely yellow.

20. I*, teller Lokw. % and 9- — Laete viriilia, proboscide, palpis,
piiniis (lu(»l)us antennaruni articulis, jileuraiuni niargine postico, ab<lo-
n.inis liasi, coxis pcdibusciue flavis, oiliis tegularnm albicantibus, alarum
vt'iiii transversa poHterioro valde obliqui.

% . Femora antica setulis subtribus arniata ; appendices liypopygii majus-
cnla? Uava?.

9 . Femoici antica setis quatuor validis armata.

Light green, proboscis, palpi, the two first joints of the antennw, the hind
•nargin of the plour.x, the basis of ihe abdomen, the coxje and feet yel-
low ; cilia of the teguljo whitish ; hind transverse vein of the wings very
obli(iue.

% . Fore femora generally with three minute bristles ; the rather large
appendages of the hyi)opygiu«u yellow.

9. Fore femora with lour stout bristles. Long. corp. 0.1(5 — 0.17. Long.
al. 0.22.

SvN. Psiiiijms trner LoEW, Berl. Ent. Zeitschr. VI, 217, 71.

Tiij^lit metallk'-grt'on, ratlior shining. Probo.scis and palpi yel-
low, the latter beset with a few niiiiutc bristles, whieh have in the
% a whitish, in the 9 a black color. Tlie glabrous face, covered
with white dust, is very broad, particuhirly upon its upper part,
which is very con"e.\. Antennas small, tiie two first joints yellow,
the second beset with a few short, unnnte black hairs ui)on the
upper side ; ui)on the under side with a few short, nunute white
hairs; the very i-mall third joint is generally blackish, still it has
sometimes a much lighter coloring. The front is generally sky-
blue, and, l)esides the usual black Jn-istles, without pubescence.
Upper side of the thorax sometimes more blue than green, rather
distinctly dusted and beset with but a moderate nund)er of Ithick
bristles. Pleura', in conse(|uence of a close white dust, grayish-
green. The scutellum, which has two bristles, is sometimes green,
sometimes purplish-blue. Abdomen shining light-green, some-
times rather golden-green ; its basis is in the 9 alwavs, in the
male generally, colored with yellow; the blnck bristles before the
hind margin of the single segments are proportioimlly short.
Ilypopygium blackish-brown and dusted with white ; its api)end-
ages are pale yellow ; the external ones are narrow lamelhi? and
are fringed with a blackish pubescence, which is somewhat longer

PSILOPL'S.

285

at tlicir tip; the inner ones arc sty lifDrni, distinolly loiifjor lliaii
the outer ones anil friuji^ed upon tiieir upi)er side witli some few
minute li;j;ht hairs ; tlie stile-lilvc eentral orj^un is us lonjr us the
inner uppenduges and is siuootldy eurved downwards. Tiic eoxio
and the long, very slender and very glabrous feet arc yellowish.
The fore coxto of the % have a proportionally long, rather close
and delicate whitish i>ul)escence ; in the 9 there are, instead of
the longer hairs, bristles of u white-yellowish coloring. The fore
femora of the % have ujion the under side near the basis, three
thin yellowish bristles of decreasing length ; in the 9 there are in
their stead four stout yellowish bristles. The hind femora of the
% have upon the upper side near the basis a few long and very
delicate white hairs, which f\re not present in the ?. The plain
and slender fore tarsi are in l)oth se.xes much longer than the
tibis" • they arc still much longer in the % than in the 9 ; the
first joint of all tarsi is very elongated, particularly in thw Z ; on
the fore tarsi it is about twice us long as the following joints taken
together, on the middle tarsi about three times as long, besides they
are distinguished by their slenderness, and apparently comi)lete
gIal)rousness. The hind tarsi in Ixth se.xes are nearly as long us
the tibite, their lirst joint in the % somewhat longer than the fol-
lowing joints taken together, but in the 9 somewhat shorter.
Tegulo! on the margin with only a single quite small Idack dot;
their cilia whitish. "NVings grayi.sh hyaline, long and narrow,
towards the basis still more narrowed, particularly in the % ;
their anterior veins are yellow, the posterior ones more infuscated;
the anterior branch of the third longitudinal vein is very long,
rather flat and but little curved; the posterior transverse vein is
far remote from the margin and has a very oblique position. The
% possesses, as a particular distinctive nuirk, upon the under side
of the basis of the wing, a crooked, black, rather stout thorn, in-
serted near the anterior margin,

Jlab. Pennsylvania, ((.'oil. Winth.)

Observation. — The P. ilelicaius of Afr. Walker, who described
a 9, has an entirely green abdomen, can therefore not be (cner,
as the basis of the abdomen of its 9 is always colored with yellow.

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DIITEUA OF NORTH AMKUlfA.

2. Middle and hiud coxio Mackisli.

[I'AUT 11.

*2l. P, (ilipeH LoKW. %. — Oracilia, loni,'ii»'s, iiitidus, capifo, tliorace
.scutf!l{)(]Ut' chiilybeis, abdoiiiiiie viridi, i)rob()scide, duolms juiiiiis ai»-
^ennanmi aititulis, coxis i)('dilins(iuo llavis, ffiiiorum intermediunuu
l)asi nigra, tiliiis iiitoriiiediis t.irsi;;iiue oiiiiiil)US fuseis.

Slender, long-leggod, sliiiiing, lit-ad, thorax and scutellnm stool-blue, ab-
domen green ; proboscis, tlio two first joints of tliu antennic, coxa' and
feet yellow, still the basis of the middle femora blackish ; middle tibiiu
and all tarsi brown. Long. corp. 0.2(5. Long. al. l>.2tj.

Syn. l'siloi>iisjUi)>es LoKw, Neue Beitr. VIII, 9!), 18.

Of slt'iulcr shape iuul very long-lofrf^ed, sliiiiiiig. IFead ])ur-
plish-liluo; proboscis yellow, palpi brown, both bosot with miiiiito
lij^rht hairs. Face without hairs, very l)roa(l, covered with deiiso
yellowisli dust ; its upi)er part is (piite unusually convex. The
two lirst joints of the antenna) yellow, the second frinj^ed witii
short minute white-yellowish hairs ; the snndl third joint rounded,
bntwnish-black ; arista dorsal, proportionally of insit^nilicant
leufjth. Front without hairs, with grayish-yellow dust, which
does not cover the shining purplish ground-color upon the middle ;
the usual black bristles of moderate length Thorax and scutel-
lum shining purpli.sh-blue, with a yellowish dust, which does not
cover the lustre of the ground-color. The black bristles of the tho-
rax rather long. The scutellum lias but two bristles, stiil near the
lateral corners, on its margin, some long hairs are inserted. Ab-
domen shining green with a very slight yellowish dust ; if the light
falls upon it from behind, narrow black fasciic on the anterior mar-
gins of the segments become apparent, which are invisible, if the
light falls from the opposite side. The delicate pubescence of tho
abdomen is whitish ; ujwn the upper side of the two first segments,
on the lateral margin and on the venter very long, otherwise
short ; black bristles of moderate length are only to be found
before tlie hind margin of the third and of the following segments,
llypopygium blacki.sh-greeu with white dust; the externa! ap-
pendages st}' liform, but little shorter than the inner ones, their
basal half light-brownish and hairy, their apical half white and
glabrous, their extreme tip black ; the inner appendages form a
brownish-black forceps. Fore coxie yellowish with a yellowish-
white pubescence, which has on their outside a rather unusual
length ; there are no bristles upon it. Middle and hind coxte

m

PSILOIMS.

2H7

bliu'kisli. Ft't't j-('ll(nv, very luiijr iiiid Ix'sct with Ijiit cxct'idiiifrly
xlmrt, ior tlu; greatL'st jmrt luiiiutu lijilit-ooNtred liuirs. All IViiiuni
slender; the foremost ones tuperinj^ towards the end, llie niidillo
ones from (ho l)asis as far as the first third, lilaek ; fore femora
npoii the lirst lialf of the under side with six perpendienlar, ereet,
lon<r, yellow, si)ine-likc l)ristles ; hind femora upon the lirst third
of the hind side frinj^ed with hni^, 1)ut very delicate whitish hairs.
All tihiiu very long and slender, fore and middle tihiic without bris-
tles; the latter, excepting the basis, are rather dark-l)rown, very
elongated, and grailually tapering towards their end. Hind tiliiic
with rather numerous, very short black bristles upon the uniier
side. Fore tarsi brown, very slender, over once and two-thirds
the length of the tibiic ; their lirst joint is distinctly longer than
the tii)ia ; the following joints are of a decreasing length, and the
last one somewhat llattencd. Middle tarsi much longer than the
fore tarsi, but not (piite as long as the middi' tibia', liliform ; the
first joint brownish-black, about twice and a iialf the length of the
following taken together, with hairs of such shortness that it ap-
pears entirely bare unless very closely examined; the four follow-
ing joints light-brownish, still tli(( extreme tip of the second and
of the alir.<)st ecpially long third joints brownish-black; the two
last joint;i are again of rather eipial length, but, taken together,
arc only about us long as the scc()iid joint ; the second and third
joints with n distinct black ])ubescence, the fourth joint with a .still
longer pubj^ci'iiee ; the small ungues are sharp and the pulvilli
very short. ]Iind tarsi brownish-black with yellowish basis, not
(piite as long as the tibiie ; their lirst joint somewhat longer than
the four following taken together; the joints from the seconil to
the fourth of rai)idly decreasing length ; the fifth joint about as
long as the fourth. Ilalteres pale-yellowish ; tegula) with whitish
cilia. Wings very long and narrow, with brown veins ; the third
longitudinal vein is only siightly turned backwards near its end ;
the anterior branch has its origin in the middh^ between the hind
transverse rein and the margin ; it diverges from this vein at an
obtuse angle and turns in a very flat curve towards the margin,
which it reaches so!newhat before the extreme apex and not far
from the tip of the third longitudinal vein ; the hind transverse
vein is unusually distant from the margin, has a rather ubli(pie
position and is not distinctly inflecte(l.
Hub. Middle States. (Osten-Saoken.)

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ATPEXDIX

SI'ECIES DESCRIBED B\ .'KEVIors ArTIIOUS .\XD NOT CONTAINED IN THK

PUESENT MONOGRAPHS.

Fabricius, Systcma Entomolorjise.

Page 783. IVIiisca longicomis.

Antcnnis setariis, pilosis, oeiieo-nitcus, pedibus nigris.

Hah. Amoriea.

Parva, statura M. aiigulata".* Antenna! nigra}, pilosa? sotaque
unica longitndine fore corporis. Corpus viridi aniouiu, nitiduni,
pedibus solis nigris. Ala; liyaliuaj. Cauda unciuata.

Fabricius, Enlomologia Systematica, Vol. IV.
Page 341. Musca loiigicoriii$i.

Antennis setariis elongatis pilosa ajneo-uiteus, abdomiue ob-
scuriore.

Ilab. America) insulis.

Statura parva M. ungulate. Antenna? clongata; nigra?, pilosa;
sctaque unica longitudine fere corporis. Corpus viridi a;neuni,
uitiduin, pedibus solis nigris. Cauda uncinata.

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Say, Journ. Acad. Nat. Sv. Philad. Vol. IIL
Page 85. Dolicliopus iinifasciatiis.

Bluish-greeu ; a white band at the base of the abdomen.

Hah. Pennsylvania.

Body bluish-green, polished, slender ; antenna?, palpi and pro-

Misprint for niKjulatx.

19

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200

DIPTKRA OF NCillTIf AMKUICA.

1.1'AHT ir.

boscis'wliitish ; snitclliiin l)Iuc ; wind's iiiiimunilato ; fi-ot whitish;
l('i';;iiiii, first so^jfiut'iit iiiiil liiilf of tho sccoiul whitish, jmsifrior
liiilf of tiio socoiiil scjfiiK'iit 1111(1 tiiird sogmoiit iiiiifh tinged witli
blue, rcinaiiiiiig segiiiciits green.

Lenglii — one-fourtii of an inch.

Central nervuro of the wing furcate, tlio exterior branch widely
nngnlated and lorniinating near the tip of the pre ;eding nurvure,
which is curved very considerably Inwards, towan'.s its tip.

Tago 85. Doliclio|iiis obsciirins.

Blaekisli-ljrassy ; wings dusky ; feet pale

Hal). J'ennsylvaina.

Head dark silvery ; antennse black-brown ; mouth blackish ;
thora.x and scuteliuiu dark-brassy; wings dusky ; feet white, a lit-
tle dusky on the tarsi ; poisers white ; terguin rather darker than
the thora.x.

Length — less than three-twentieths of an inch.

The central nervure of the wing is nearly rectilinear, being
hardly perceptibly reflected.

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Page 8G. Dolicliopus fenioratus.

Green ; tibia; and tarsi whitish.

Hah. reiiiisylvaiua.

Body brilliant green, with bluish reflections; front prninose ;
antenna' ))lackish ; proboscis yellowish ; wings hyaline ; scutelluin
blue ; thighs green and excepting the posterior ones, whitish at
tip, tibite white, tarsi dusky; tcrgum, ultimate joints cupreous at
their bases.

Tjcngtli — three-twentieths of an inch.

The l)rillinii('y and shade of green in this insect are similar to
7>. sipho; when living, and in the sun's rays, it resembles bur-
nished gold, nervurcs nearly as in sipho.

Say, Journ. Acad. Nat. Sc. Phllad. Vol. VI.
Page 168. Psilopiis feiuoratus.

This brilliant species varies in the color of its thighs, which in
my description are stated to be green ; a specimen taken in Indiana
has whitish thighs.

^

Al'I'KNPIX.

201

Pr.ge 1()8. (liryNotiiH niiliiliiH.

lllnckisli ; feet dull Iioiicv-vcIIkw.

yA//A liidiaiiii.

IJudy ItliirUisli ; lu-ad didl ]»limil)('ons ; tliornx ciiicrcniin, witli
tlircf liriiwii lilies ; wiiijii's iimiiacidatf ; jioiscrs wliitc ; Ifot dark
limicy-yiliow ; tlnjriis Itliick at i»aso an<l aliovc.

Leiijrtli — rather over one-tenth of an inch.

rni;u 1IJ8. 4'lir}'Hotus coiiciiiiini'iiiH.

Cireru-l)i'assy ; terjriini blue towards tlic tip.

Ihilt. Mexico.

lleuil \iolaceons, with a cinereo\i«; reflection ; jtalpi with a cine-
reous rellertion ; aiiteniuu black ; thorax green with u ]x\'v\ oliva-
ceous rellection ; wind's hyaline, obs(tletely tiiijfcd with yellowish
on the (Mtstal nnirain ; poisers white ; terguin with a fi'vay rellec-
tion, brassy-jrreen at base, and violaceous toward.s the .ip; thijrhs
green ; tiltiic whitish.

Length — one-fourth of an inch.

Page liin. Clirysotiis abdomiiialis.

(ireen, polished; feet white.

Iliih. Indiana.

]>ody briirlit <rreen, brilliant ; liypostonio purple ; antei.nic yel-
low, thorax iniinaculate ; ])f»isers yelUnv ; terfruin, first scfrinent at
base with an olisolete yellowish lino; feet white; venter 'vhile, at
tip blackish pu'-ple.

Length — J* one-tenth of an inch.

Page 100. IITedeteriis lateralis.

Torjrum pale, with a lateral series of polished spots.

lliil). Lidiana.

Head silvery; proboscis ct antcnnie yellowish, seta of the latter
with the first joint very short ; eyes (when recent) green polished,
vith a cupreous reflection ; thorax green, somewhat )»ruiiiose,
with a dorsal rather compound vitta ; wings hyaline ; jioisera
whitish ; tergum dull yellowish, with a series of brassy sjiols on
each side, posterior two largest ; feet and venter whitish.

Length — nearly three-twentieths of an inch.

The dorsal vitta is impressed behind.

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DIITKII.V (»K NOIITII AMKUICA.

[I'AUT H.

Pa^u 17i>. ItltMleteriiH iiiiiictiiu'iiiiiH.

Thorax vuricffutctl ; wiii^s with hruwii spots.

Jldh. Mexico.

'riionix olivo-browii, triliiicatc ; miiMh' line Kicnilcr, <lull yel-
lowish, obsolotcly zigzuf^ ; outer lilies eiiiereoiis with hiack points;
soiitel brown, cinereous in the middio; winji's hyaline, with iniiny
irren^ylar fuscous s|»ots, ha/dly to Ix; traced into four imnd^ ;
l)oisers yellow ; tern'iini cupreous, ]»osterior nuir<;ins of the sej^-
mcnts bliickish ; feet white ; tarsi l)lackish.

Length — nearly oiie-lifth of an inch.

Pngo 171). Dulicliopiis abdoiuiiiulis.

(Jreen, ulnloinen rufous.
J/<th. Indiana.

Head silvery; antennic, first and socoiid joints hlack, third
; thorax polisiied g'reen ; wiiijrs hyaline ; ahdonK'n, excepting,'

the terminal joint, rufous ; halteres white ; pleuriu and pectus
blackish, pruiiiose ; feet white ; tarsi dusky.
Leiiifth — less than three-twentieths of an inch.

J

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Wiedemann, AufsereuropaiftcJu^ Za'oiijli'ujUin', Fnacclcn, Vol. II.
Page 210. Xo. 1*1. l*silo|)ilH lliucillu.

Yiridaureus ; autenuis nij,'ris, pedibus llavis ; alls niaculA iua<iiii\
fiiScA.

Clriingolden, mit schwarzen Fiihlcrn, gelben Ik'inea und eineni
frrosseii scliwiirzlich-brauiien Fliigelllecke.

Liingo ;} Linieii 9. Von der Krabbeninsel in W'estindien

Untergesicht an den Fiihlerii schon Htahll)!au, Aveiter u'lteii
griingolden, iiberall aber in gewisser Kichtung fast silberweiss
schininiernd. Stirn griingoldeii, in's Stuhlijlaiit' fallend. Iliicken-
schild obenso, ganz vorn wenig wciss-schinnnernd. IJrustseiteii
cbenso, docli iilteral! stark weiss-scliinunernd. Ilinterleib griin-
goldeii, an den Kinsclinitteu schwarz, in gewisser lliclituiig audi
wold kiij)ferrotlilicli. JJeiiie gelb ; liinterste Schiencn und Fiisso
allniiililig braun. Fliigel wasserklar ; der Fleck liegt liings dor
llippe und niinint von ilir sell)st bis Zwei drittel dor Fliigolbroito
eiii, or liogt von Wurzel und 8})itzo gleicliweit entferiit, niniiut
etwa die Zwei luittlerii Viortol dor Fliigel ein, und hat einen ge-

T^

AI'IT.MUX.

2t»3

riiiKlctf'ii Iiinoiiranil. (In II(triil)iTk's jSainiiilmi}^ /ii KoiJi-ii-

liiiii'i'ii.)

{Tiiiiisl'iiiiiii.) — f!i)M(>n prct'ii, with Mmk niitt'iiiKi', yi-Uow fi-ct ainl a
lnri.'f liii(\\*iiislil.ln<'k !<|Mit on tin- wind's ; li'iii,'tli tlirt-ii lines, ^. From tim
('nil. I.<laii.ls (W.'.-t Imli.'O-

I'acn lirif^lit st»'i'l-l)liM near tin' aiili'nn.'P, ^'olll^•n-gr^>t'Il fartliiT lu'liuv,
t'Vciywlicii' witii !i silvery renectinii in a certiiiii liglit. Front golden-
j;reen, with .1 Miiisli rellection ; thorax likewise, Imt with a silvery rellei'.
tion anteriorly ; iil.'nr.e ot' the same eolor, altok'ether with a whitish rellec-
tion. AlMlomiMi gohlen i^reen, hlacU at tho iniisnres, in a eertai'.i li^'iit
rt'ilili^tli-c'opiiery. Ffft yellow ; himl tiliiai anil I'eet gradually infuseateil.
Winu's hy.'iline; the ilark spot i.i alon^ the costa .'iinl estends to ahout two-
tiiirds of the hre.adth of the winj.'; it i.-t eipially distant from the liase and
the tip, and occupies nlioiit two-fourths of the length of tlie winu' in the
niiddlf; its inner border is rounded. (Ilornbeuk'u Collection in Copen-
liagi-n.)

Page 21',). !Vo. i:i. rHilopilH Majl.

J'liit'iis ; [iiitoiiliis, iihdnniiiiis \m<\, im-isiifis pi'diliiisciiic (luvis.

Kiv.o-riiii, mit ot11»cii Fiililcrii, Iliiit('rlcil)s\viirzt'l. J'iiiisclniittcu
uiid l)iiin'ii. lisiiijii' iij liiiiit'ii %. Alls I'cniisylviinicii.

J>iilirhiij)ii.< Kiiil'dKciiitiix Siiy, .fMiini. Aciid. I'liilml. Ill, s."(, -J,

I'lililcrwiirzci, alter iiiirh wnlirsclicinlicli das vfrltireii frt'^^aiifrcno
Eiidu'licd, ^rdli. Viitcrirt'siclit lidilinft civ.oTliii, iintcii wciiiji: wciss-
.^(•liiiiimi'nid ; Stini sinaniirdjri'iiii, iiiit -Mclallo'Iaiiz. Uiickcnsrliihl
in'.s (Jriiiij!;iild('ii(.' iilicrj^t'lii'iid ; die jrriiii)-''<tldeiieii lirtistseiieii weiss
befeil'l. Krster Jliiiterleiltsaltselmitt iilterall, zweiter an der
Wiirzel, f()l<rende an den Kiiiseliiiitten prjlb ; die IIiiii|ttfiirlte des
Hiiiterleibes ist nn der Wiirzel sinarafrdfrri'mlieli erzCarlien, was an
der Siiitze ins (iriin,ir<ildene iiltei-o'eht. Fiiiirtd selir lielit <re|ltlicli,
iiiit jrellien 'Adern. Heine jrel't; Vdrdersto Fiisse iihei'iili, liintefe
iinr an dor Spitze sfli\varzlieli-l)raun. (Ini Pliiladeljtliiseheii
Museum.)

{Tratislfition.') — Bronze-green, with yellow antenna*, basia of the abdo-
men, incisures and feet; length two and two-thirds of Hues, ^. Penu-
sylvania.

Syn. I). un!/<isci'it:ts Say, .Journ. Ac. Phil. Ill, h.'), 2.

Basis of antennjB and probably also the last joint (which is broken)
yellow. Face brisiht bronze-green, with a sliglit whitish reflection below.
Front emerald-green, with metallic retlection. Thorax verging into golden-
green ; the golden-green jilenrw whitish-prninose. First abdoniiml sesr-
xnent yellow, the root of the second (ind the incisures of the following, also

1

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204

DIPTERA OF NORTH AMERICA.

[taut II.

jcllow. Tlie principal color of tho alulomen is bronzo eim'ral(]-grt'('iii> h
towards tin; base, cha'itiing into golden-grt't'n towarils tlio tip. Wilms vi'iy
liglit yt'llowisli, with yellow vt'ins. Feet yt'ilow, tori" tarsi altnirctluT
blaukish-browu, posterior ones only at tho tip. (AMust'iini of rhiladcljiliia.)

Page 220. !Vo. II. I'silopiis loiiKicoriiis Fai:u.

.l']neiis ; ahdoininc iiicisiiris atris, alis liiiipidis.

KrzfiTlin, init ticf schwarzcii lliiitorK-ihscinschiiiHiMi uiid was-
scrklarcii Fliiuolii. Liiii<i-o 2|] Linicii. ^\us Wcstiiidicii.

IJiitcr^csicht crzg'i'iiii, kaum am untcrii Tlioilu in jri'W isscr
KiclitiiMg woisslirli schiinnicnid. Stini erzjrriiii. Jliicknischild
uiid IIiiit<'i'lt'il> f;;riiii,tfoIdi'n, differ an dcr Wiirzcl der Altsdiiiitti!
tirf scliwarz. Kliif^td ungcfarht ; Scli\viii;i'cr jrcll). JJciiic scliwarz
an den Hcliciikilii last nictallj^lanzciid an dcti vurdcrsti'ii JSt'ldciuii
loImiL^'Ib. (In dcr Fabriciiis, schcii Saiundiiiijr.)

{Trausliition.) — Bronze-green; abdoTnen with deep black incisures;
wings liyaliuo ; length, two and two-thirds of lines. West Indies.

Face bronze-green, with a slight whitish lustre on its lower part. Front
bronze-green. Thorax and abdomen golden-green ; the latter deep black
at the root of tlie sc^gnients. Wings hyaline ; haltercs yellow. Feet
black, almost with a metallic lustre ou the femora ; fore tibiie luteous yel-
low. (Fabricius's coUectiou.)

Tage 224. No. 33. Psilopiis caiiilatiis.

Tliorace junco-viridi, abdoniiiio viridaureo; iucisui'is atris, tibiis
fiavis.

Mil crz^n'iinom liiickonscliilde tnid fr'.'iiiifroldtMicin, solnvarz
t'inoTSciinittonoui Ilintorkdljo und tiTlbon Scliieuen.

Iiiin<>;i> 2 bis '1\ Liiuen. Von Savannah.

Dent r. lowiicornis vorwandt. Fiililcr sdiwarz ; TTiitcrjrcsiclit
orzfrriin, silbcrwcisslioli soiuninK'nid ; sUin priin<!;<)I(l(Mi, am Wcib-
dien mclir ab' am Maniu'ben. Hiit'kenschild dcs ^Sliinncbcns liin-
U'li in's Stahlblai'.o iiljcrgclicnd, am Woilii-hon diu'dio:t'li('iids j!:riin-
froldcn. IJrustseiten sillxTwoisslich, Iliidorleil) griiiif^oldon, niit
an dor Wnrzel ticf schwarzon Abscbnitten. After dcs .Mannclicns
mit scln- laiifron Tlaami l)(.-si'tzt. Fliiscl wassorklar ; Schwiiificr
pclbiicli ; Sohcnkol dos Miinnclicns orzfrriin : vordcrc mit lod('rfi;clbcr
Spitzc, SHiicMion siimmtlich ledorp:('ll>. Fiisso schwarz. Am
AV('il)rlicn sind audi die Sdienkd gdb. (In Wostcnnann's Samm-
lung.)

;i

APrENDIX.

295

{Tidusldtion.) — Thorax liroii/e-gioon ; abdomen goldon-green, with
liliicK iiiuisuros ; tibi^u ^'ellow ; k-iigth iioiu two to two and one-fourth
liiu'H. (Savannali.)

Related to /'. luni)ironiis. Anteiin.-c hiack. l-'ace bronze-green, with a
silvery-wliite rellection ; front goldtsn -green, more so in the 9 than in tlie
■J,. Tiiorax of Jj more . steel-blue ;Misteriorly ; of tlie 9 'I't^'gylher golden-
green. Pleuraj Hilvery-white. Ab(h>men golden-green, with the segments
deep-black at the basis. Ilyi)opygium b<^set with black hair. Wings
liyaline ; halteres ynllowish. Femora of the male bronze-green ; tlui fore-
most with the tip yellowish ; all the tibia; leather-yellow. Tarsi bluek.
The femor .>f the 9 '^'•■'" yellow. (Westermann's collection.)

Page 224. :\o. 21. I'siloiius Yirgo.

TEnoo-viriilis ; pcdihiis hiitc fliivis.

J']rz,i;;riiii, init scln'tii gL-Ilu'ii IJcineii.

Liiiifj;'c 2 Liiiion, 9. V(»ii Xi-w York.

FiilMcr scliwarz. Unlcrgi'sii-ht griiii, mit sill)cr\vcissom Scliim-
HK'i'. .Mittelh'ilt schuii iTzgriin. Ilintcrh-il) griingoldcn. Fliigol
\iiig('('iirl)t, Adorn ))riniii ; Spit/ciMnicriuk'r kciiii'ti winkcligoii
ijogcii bildcnd. Schwiiigcr uiid l>ciiu' loI)li!ift gcll), iii's liostgclho
lalk'nd. lliiilorsto Filssio .suhwarzlicliln'iiuii. (lu mcinor iSaiuin-
luiig.)

( Traitslalinn.) — (Jolden-greeu with handsomely yellow feet ; length two
lines, 9- (New York.)

Antenna) black. Face green, with a silv<'ry-white reflection. Thorax
handsome green. Abdomen golden-gretsn. Wings not pictured ; veins
brown ; ujjper branch of the fourth lonu'itndinal vein not forming an
angular curve. Halteres and feet bright-yellow, somewhat reddish-yellow.
Hind tarsi blackish-brown. (In my own collection.)

(i.i*

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Page 220. l\'o. 2K. Psilopus fenioratiiH.

J'iiK'o-viridis, iuitcTinis nigcllis ; pi'dil)ns lluvis, fcniorihiis basi
viroiitil)US ; alls liinpidis.

Lchhaft orzgriin, mit schwarzlichiMi FiihhMMi, gcUxMi Ilcincn, aii
dcr Wurzol griiidichcn Sclicnkclii mid wasscrklaroii Fliigolii.
liiiiigc \}r Linifii. A us I'l'iinsylvanicii.

Aut'h dk'se klcinc Art ziclit dcr Farltc nadi stark inV. (iriiii-
goldciio, Z'uvt'ileii an Stirii uiul lliickciiscldld in's illiiulichc. Vi\-
((.]-o;,.siclit und IJnistscitoii wcisscliinmicriid odcr bcrcii't. Iliissol
golblich. Fliigel uhne alio Zoichuung. lioinc bloicb golb.

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296

DIPTERA OB' NORTH AMERICA.

[part II.

Sflienkel griinllch, die vordeni niit gelber Spitze. (In meiuer
Sammlung.)

{Translation.) — Brilliant bronze-green, with blackish antennre, yellow
feet, femora greenish at the basis, and hyaline wings. Length one and
one-half lines. (Pennsylvania.)

Tlie color of this small species also approaches the golden-green ; front
and thorax are sometimes bluish. Face and pleurie have a \7hite reflec-
tion or are pruinose. Proboscis yellowish. Wings not pictured. Feet
pale-yellow. Femora greenish, the anterior ones with yellow tip. (In ray
own collection.)

Page 227. No. 30. Psilopiis muiidus.

Omnino clialybeiis, veni\ apieali in anguluni obtusum flexA.

Uebcrall stahlblau, niit stumpfwiukolig gebogcncr Spitzen-
qucradcr. Li'iiige 1^ Linicn. Von Savannah.

Fiihler schwarz ; Untergesicht und Stirn satt stahlblau, dcr
iintorste Tlieil jenes nur schr wcnig weiss-schiinmernd. ]\Iittel-
und llintcrleib satt stahlblau, an den Seiteu hin undwiedor griin-
lich, doch so, dass ich kaum glaube, dass cs ganz griine Abiinder-
ungen gcbe. Fliigel ungcfarbt. Die Spitzenquorader bildet
keincn so gleichforniig gekriinnntcn Bogcn, wie bei P. virgo,
sondorn macht eincn stunipfen Wiiikol. Schwinger gelb. Boino
schwarz, an den Schcnkeln stahlbliiulieh. (In meincr Samndung.)

{Traimlafion.') — Altogether steel-blue, with the anterior branch of the
fourth longitudinal vein angularly curved. Length one and one-half lines.
(Savannah.)

Antennae black ; face and front saturate steel-blue ; the lower part of
the former with only very little wliite reflection. Tliorax and abdomen
saturate steel-blue, in some places on the sides greenish, still so as to
make me doubt whether there are entirely green varieties. Wings not
pictured. The branch of the fourth vein is not regularly arched as in
P. vinjo, but forms an obtuse angle. Halteres yellow. Feet black,
femora steel-blue. (My own collection.)

Page 232. "Xo. 6. Dolicliopiis obsciirus Sat.

^neo nigcllus ; capite niveo-micaute ; alls infumatis, pedibus
flavis.

Erzgriinlich-schwarz, mil schneeweiss schimmerndera Kopfe,
rauchgraulichcn Fliigeln und gelbcn Beinen. Liinge 1^ Linien,
9. Aus Pennsylvanien.

Fiihler tief schwarz ; Untergcsicht und Stirn schwarz, bcide

APPENDIX.

!97

schneeweiss scbiminornd. Kiickeiisdiild aiis doiii Scliwarzlifhon
ill's Gi'iiiie und riUhlicIi stalil'jhiue sitit'lcnd ; Ih'iistst'itcii wciss-
bcreift. llinttrleib inetallisch schwar/licli, iii\s diistcr griinliche
zieliend. Fliigel satt rauoligi'au ; iScliwiugTr und IJeiiic golb
(Im riiiladt'lpliisfhon Musoum.)

(Tiaiislatl',11.) — Blacki:<li bronze-green ; head with a snow-white retlec-
tion ; winirs smoky-gray ; feet yellow. Length one and cue-half lines, 9 •
(Pennsylvania.)

Antenuie deep-black; face and front black, both with a silvery-white
reflection. Thorax changing from the blackish into green and reddish
steel-blue; pleurse pruinose with white. Abdomen nietallie blackisli,
with a dusky greenish reflection. Wings saturate smoky-gray ; halterea
and feet yellow. (Museum of Philadelphia.)

3Iacquart, Diptcrcs, Sidles d Buffon, Vol. I.
Page 450. No. 6. P«ilopiis radians.

Long 2i lig. D'un vert ou d'liii bleu violet, tres l)rillant.
Antennes noires ; aeuxienio article garni de soies allongees, ravon-
naut a rentour ; style furt nllunge. IJord des segniens de I'abdo-
men noir ; organe copvdatour pen cpais. Pieds noirs ; janibes
anterieures et intermediaires jaunitres. Bord exterieur des ailes
un peu brundtre vers rextreniite. De I'Aiueriquo septeutrionalc.
(Cabinet de M. Percheron.)

{Translation.) — Length two and one-half lines. Purplish-green or blue,
very brilliant. Antenna black ; second joint fringed with elongated,
radiating bristles ; arista very long. Borders of abdominal segments
black; genital organs not very stout. Feet black; fore and middle tibite
yellowish. Anterior margin of the wing somewhat brownish towards the
tip. North America. (Mr. Percheron's collection.)

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31acqvart, Diptcrcs cj-ofiqucn, Vol. IT.

Page lit). No. 11. Psilopus siplio,

Lfete JBneus. Alis abl)reviato-bifas('iatis. Antennis nigris.
Pedibus flavis ; fenioribns nigris J*; tibiis postieis nigris ^
(Tab. 21, fig. 1.) Wieckmann a decrit eette espeee ooniine ayant
les pieds jaunes dan? )es deux sexes. Suivant nos ol)servati()ns
sur un assez grand nombi'e d'individus, les fenielles senles out les
pieds de cettc coulenr, a rexeoption des tnrses noirs ; les males
ont les cuisses noires, ainsi que les jambcs posterieures.

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298

DII'TKRA OF XOIITII AMKIUCA.

[I'AUT IT.

Cc'tto ospc'jcc est ('1)11111111110 ot iviiaiidiK.' duns line {iTunde iiartio
de TAiii; ri(|iie. Nous en iivuns vu dcs individiis do la I'eiisyl-
vanie, du Cuba, do la (.iuyaiie et dos diilrreiites parties du l>rcsil.

(_Tntiisliilion.) — Bright hionze-grcen. Wings with two al)l)n>viateil
fascia'. Antoniia) black, l-'ect yellow. Femora lilack('^); liiiid tihim
black ( I ). (Tab. XXI, fig. 1.)

Wiedeiiianu described this species as having yellow feet in both sexes.
According to iny observations on a considerable number of specimens, the
females alone have; the feet of this color, with the exception of the black
tarsi ; the males have black femora and hind tibiic.

This species is common in a consideralile j)art of America. We have
specimens from Pennsylvania, Cuba, Guyana, and from dill'erent parts of
Brazil.

Page 121. ]Vo. IS. Psilopiis radians.

liietc-iencus. Antennarum artlcido secundo setis clungalis
radiati.s ; stylo longissinio.

L<)n,ir. 2n. ^.

D'lm vert on (run lilou violet tW'S brilliant. Antcnnes noires;
dcuxif'inc article g-ariii de soies allong-oes, rayoniiant a Tentour ;
style fort allonge. IJord des seg-ineiits de Tabdonien noirs ; orgaiic
copulateiir peu (>pais. Pieds noirs, janibes postih'ieurs ct iiiler-
niediaires jaunatres. Bord ext(?rieur des ailes un peu bruni\tre
vers re.YtrcMuiti}.

De rAiuericpie scptentrionalc. (Cabinet do M. Pcrclieron a
Paris.)

{Trauxlaliou.) — Bright bronze-green. Second joint of the antennaj with
elongated, radiating bristles ; arista very long. Length two and one-half
lines, %.

Purplish-green or blue, very brilliant. Antennse black. Second joint
fringed with elongated, radiating bristles. Style very long. Margin of
the abdominal segments black. Ilypopygium not stout ; feet black ;
intermediate and hind tibia) yellowish. Anterior margin of the wings
somewhat brownish towards the tip.

Is'ortli America. (Collection of M. Percheron in Paris.)

Macquart, Diptcrra exoliques, Siippl. IV.

Page 124. No. 3. Clirysotiis Tiridifeinora.

Viridi aureus. Antonnis nigris. Podibiis rufis, femoribus
viridibus. (Tab. 12. lig. 3.)
Long, uiio 1. 9.

i< ..'{

APPENDIX.

299

Face et front verts, u .luvct blunc. Anteiines ct style iioirs
Thorax ot abiloinoii d'uu vert (Ion;. Cuis.ses (run vert brilhint, a
jvenoux jivunes ; jiunbes fuuves ; tarses d'un juune brunitre;
posterienr' bruns, ;i premier artiele jaune. Ailes elaires,

I)e rAineri([ue septenlrionale. (Colleetiou ties M. Jloll'nuister
lie Nordhausen.)

(Traiisfatliin.) — OoMen-green. Antennre Mack. Feet rufous, femora
green. (Tab. XIl, fig. 3.) Length one lino, 9.

Face and front green, witli wliite down. Antennjc and arista black.
Thorax and abdomen golden-green. Femora brilliant-green ; km-es yellow ;
tibia) fulvous ; tarsi brownish-yellow ; the hind ones brown, with the iirst
joint yellow. Wings hyaline.

North America. (Collection of Mr. Hoffmeister in Nordhausen.)

Page 128. No. 5. Dolicliopus lieteroueurus.

vEneo-virlilis. Tlioraee vittis violaeeis. Pe(lil)us ilavis. Alis
cellula postiei prinii subelausi. (Tab. 12, fig. 10.)

Long. 1^ 1.

Palpes noirs. Face et front larges, d'un vert noinVtres, a It'ger
duvet gris. Antennes : les deux premiers articles fauves ; premier
un pen allongi'; et menu ; troisiunie ovale, assez large, iioir, a Ijase
fauve ; style noir, i)eu allongt-. Thorax d'un vert funcc, a Ijandes
violettes. Abdomen vert ; ventre a duvet blane. Pieds jannes,
handles anterieures noinUres ; un pen de brun a rextremito de.s
cuisses ; tarses bruns. Ailes assez elaires ; premii/re cellule |)ostc-
rieiire presque fermee ; deuxiemc ucrvure transversale eluignee
du coude.

De rAnierique septentrionale. (Collection de M. Hoflnieister
de Xordhiiusen.)

(Translation.) — Golden-green. Tliorax with violet stripes ; feet yellow.
Wings with the first posterior cell almost closed. (Tab. 12, fig. 10.)
Long. lin. one and one-half.

Palpi black. Face and front broad, blackish-green, with a slight gray
down. Antennte ; two first joints fulvous : the first somewhat prolonged
and slender; the third oval, rather broad, black, with fulvous basis;
arista black, not very loner. Thorax dark-green, with violet stripes.
Abdomen green, venter with whitish down. Feet yellow, anterior coxa
blackish ; tip of femora somewhat infuscated ; tarsi brown. Wings rather
hyaline ; first posterior cell almost closed ; second transverse vein at some
distance from the flexure of the fourth vein.

Ilab, North America.

->w '

800

DIPTERA OF XOUTII AMKUICA.

[I'AUT II.

■ii

Wal/>cr, Iiiscda Saioulrrsiana.
Page 207. PAilopus Icpidlls Mas.

Tiridis, alKlominis soginentunim nmrgiiiilxis anticis nijrris,
antfiiiiis pc'(lilni,s(iiic iiigris, alls liiupidis fusco-hilhsciatis.

JJi-iglit-grt'L'ii, beset with bhick bristles; li.jad Idue, tiii<j;ed with
purjile, adorned in iVoiit with white bloom ; eye.s bright-red ;
mouth bhu'k ; feelers blaek ; sixth joint as long as the ehest ;
chest not shining, tinged with blue ; breast with a iioary covering;
abdomen tapering from the base to the tip, narrower and nincli
longer than the chest ; a black band on the fore border of each
segment ; legs black, clothed with black hairs and bristles; wings
colorless, adorned with two dark-brown bands which are united
on the fore border ; tip cross-vein forming a right angle, wliencc
it is indistinctly waving to the tip of the wing; lower cross-vein
very slightly waving; wing-ribs and veins black. Length of the
body two and one-half lines ; of the wings six lines.

3Iexico.

Page 211. 9Iedeteriis exustus Fem.

Nigro-ffineus, capite antico viridi ; abdominc purpurco cuproo,
antcnnis pedibuscpie nigris, femoribus asneis, alis cincreis, costii
venarunKjuc marginibus fuscis.

Allied to 31. notutus. Bronze-black, beset with black bristles,
which form a cross-row behind the head, adorned beneath with a
whitish covering ; head green in front, clothed beneath with black
hairs ; peristoma prominent ; eyes red ; facets of the fore part
rather large ; feelers black ; abdomen ol)conical, coppery with a
slight purplish tinge, not longer than the chest ; legs long, black,
thickly clothed with black down, beset with a few black bristles ;
thighs brassy, armed with black spines; foot-cushions dark-tawny;
wings darkish-gray, very dark-brown beneath the fore border and
along the borders of the veins in the disk ; wing-ribs and veins
black ; poisers dark-tawny with pitchy knobs. Length of the
body two and one-half lines ; of the wings six Hues.

Bolton, North America.

APPENDIX.

301

Page 212. Medeterus viridiflos Feu.

Fulvo-vlridis, thoracis disco fusco, autcnnis pcdibiisciuo uigris,
fumorilMis viridibus, alis subcinorcis ad costaia sulifiiscis.

Pale grassy-grcon, tinged with tawny above and witli whitish
bloom beneath, beset with a few black bristles; head brown about
the eyelets, beset behind the eyes with a row of black bristles,
clothed l)eneath with white hairs; eyes red, thickly clothed with
short, white hairs ; feelers black ; disk of the chest brownish ;
abdomen obconical, longer than the chest, clothed with very short
white hairs ; legs black, clothed with very short black hairs, beset
with black bristles ; thighs green, with which color the shanks arc
also tinged; wings slightly gray, tinged with pale-brown beneath
the fore l)order ; wing-ril)s and i)oisers tawny ; veins black, tawny
at the base. Length of the body one and one-half lines ; of the
wings four and one-half Hues.

North America.

I'W.

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Page 212. Dolicliopiis bif rons Fem.

JlJneo-viridis, capitis vertice cyaneo, abdominis segmcntorum
larginibus anticis cupreis, antennis fulvis, pedibus flavis, alls
sidjcinereis.

Green, beset with black bristles, adorned beneath with a white
covering; crown of the head blue, tinged with green and purple;
an olive stripe between the feelers and the epistoma ; eyes red ;
mouth pitchy. Feelers tawny ; third joint pitchy towards the til) ;
sixth black, feathered ; a brassy tinge on the chest ; alKlonien
obconical, longer than the chest, coppery on the fore border of
each segment whose sides are adorned with a white covering;
legs yellow, clothed witli very short black hairs, which as usual
are most frecjuent on the feet ; thighs stout, shanks beset with
black bristles ; wings very slightly gray ; wing-ribs tawny ; veins
black, tawny at the base, poisers yellow. Length of the body
one and one-half to one and three-fourth lines ; of the wings
three and one-half to four lines.

United States.

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302

DIVTEllA OF NORTH AMERICA.

[I'ART II.

Page 213. DolicliopiiH conHors Feh.

yEncn-viridis, vertico ixirpiiroo, tlioraco aiiticu rymioo, ubilomini.s
sntiiris iiifi;ris, luitL'iiiiis iK'iliIjii.s(iiiL' I'lilvis, alls siiltciiKTcis.

(Jri'cii, bosot willi bhiok bristles, adorned bonoutli witli a whiti.-h
covcriiiir ; crown piirplo ; eyes black ; mouth tawny ; feelers
tawny ; sixth joint black, feathered with much shorter hairs than
those of 7>. bij'rons; chest brassy-j^recn, blue in front ; abdomen
obcoiucal, clothed with short, black hairs, a little lonfrer than the
chest, sutures of the segnients blackish ; legs tawny, c''»thed with
very short black hairs; shanks beset with black bristles; wings
grayish ; wing-ril)s tawny ; veins black, tawny at the base ; poisers
tawny with yellow knobs. L'cngth of the body one and one-
fourth line ; of the wings three lines.

United States.

Page 213. Dolicliopiis contingens F^m.

Yiridis, vertico purpureo, antennis pedibusquc fulvis, alls
suljcinereis.

Green, beset with black bristles, adorned beneath with a whitish
covering ; crown purple ; eyes black ; mouth tawny ; feelers
tawny, sixth joint black, feathered like that of/), consurs ; abdo-
men obconical, clothed with short black hairs, a little longer than
the chest ; legs tawny, clothed with very short black hairs ;
shanks l)esctwitli black bristles; wings grayish ; wing-ribs tawny;
veins black, tawny at the base ; tip cross-vein less angular than
that of I). couHors ; poisers dark-tawny. Length of the body one
and one-fourth line ; of the wings three lines.

United States.

Page 213. Dolicliopiis Iielies Fem.

JEnens, vcrticc cyanco, abdominis segmentorum raarginibus
posticis viridibus, antennis pedibusque fulvis, alls cinereis costa
venarumque marginibus fuscis.

Brassy, beset with black bristles, adorned beneath with a
whitish covering ; crown of the head blue ; eyes red ; feelers
tawny, sixth joint l»lack, feathered with very short hairs; alnlo-
men obconical, longer than the chest ; hind borders of the seg-
ments green ; legs dark-tawny, clothed with very short black

AI'PKNDrX.

303

liiiirs ; shanks beset witli black bristles; wiiifj^s gray, b^()\v^
beneath the lore border, and alonj,' the iionlers of tlie veins; wing.
ril)s and veins blaek ; poisers tawny with pitchy knobs. Tiengtb
of the body one and une-t'uurth lino; of the wings threo linos.
United States.

Page 214. Dolichopiis ineptus Vem.

^Encus, vortiee pnrpureo, alxloniinis lateril)us albo niaenlatis,
npiee viridi, antennis pedibuscpie fulvis, tarsis siibpieeis, alia
einereis fusco vittatis.

Urassy, beset with blaek Ijristles, adorned lieneatli with ft
whitish covering ; crown purple; eyes rod; feelers tawny, sixth
joint black, feathered with moderately long hairs; alidoinen
obeonical, longer than the chest, green at the tip ; a white spot
on each side of every segment ; legs dark-tawny, clothed with
very short blaek hairs; shaidcs beset with blaek bristles; feet
almost pitchy; wings gray, tinged with brown along the third
and fourth longitudinal veins; wing-ribs tawny; veins black;
poisers tawny, with ferruginous knobs. Length of the body one
and one-fourth line ; of the wings throe lines.

United States.

1*1 '(i-i'

i-;ni

m

Mr

Fage 214. Dolichopiis luaculipes Fem.

Aeneo-viridis purpurco variu.s, antennis fulvis apice piceis,
pcdibus fulvis, tibiis nigro maculatis, tarsis piceis, alls einereis
costi nervoruraque marginibus fuseis.

Brassy-green, beset with black bristles, adorned beneath with
a whitish covering ; crown adorned with blue and purple ; eyes
red ; feelers tawny ; third joint pitchy ; sixth black, feathered
with moderately long hairs; disk of the chest partly purjde;
abdomen obeonical, a little longer than the chest, clothed with
short black hairs ; legs tawny, clothed with veiy short black
hairs ; slianks beset with black bristles ; feet almost pitchy ; a
black spot on the tip of each thigh ; five or six black spots on
each shank, these spots are most distinct on the hind legs ; wings
gray, brown beneath the fore border and along the borders of the
vein,-* ; vving-ribs and poisers tawny ; veins black. Lengih of the
body one and one-half line ; of the wings three and one-half
lines.

United States.

■ V

■te'

! /;

TT

304

Ml'Tl;ilA OK NollTII AMI'.ltlC.V.

[I'AllT II,

Page 215. l>olicllO|iUH |llllc-lll>r, Mnn. ut Ft>in,

Cyiiiioo-viridis, antonnis iii>rris, reiiioribus virklibus, tiltiis fiil-
vis, liirsis picc'is apico iiijrris, alls liii)i>klis.

Uri^^lit giTi'U with a I)liiish tint, Ixvsot with black bristles,
aih)nu'(l liuiioalh witli a whitisli covt'riiijj; ; oyes ))ri>fht rc(l ; fcch-rs
black ; sixth joint bare; abdoiiicn of the male cyliiidrifiil, of thi;
foiiialc obcuiiical, t'lothod with short black hairs, a little Iniiiicr
than till' chest ; scales of the male white, bordercil with Ijlack ; Icj^-s
tawny, clothed with very short black bail's; thiji'hs gi-een ; shaidvs
besot with black bristles; feet )>itcliy, black towards the tips;
trocliiintors of the male yellow, uf the fennde tawny; wiiij^s
colorless; wing-ribs tawny; veins ))laek ; fourth lonjritudinal vein
not as usual converging to the third after Its curve, but almost
parallel to it; poisers yellow. Length of the body 1^ line; of
the wings ;} lines.

United States.

•

Page 215. Dolicliopiis vai'iils, Fern.

vKnco-viridis cyauco varius, abdoinine fasciis albidis ormito,
antcnnis pedil)us(iue fulvis, tar.sis nigris, alis cinereis, costi macii-
lis{pie quinque fuseis.

Brassy-green, tinged with blue, beset witli Idacl. bristles,
adorned beneath with a whitish covering; eyes red; feelers tawny ;
sixth joint black, feathered with moderately long hairs ; abdomen
oljconieal, longer than the chest, adorned with bands of whitish
hue ; logs dark tawny ; clothed with short black hairs ; shanks
beset with black bristles; feet black ; wings gray, brown beneath
the fore border, adorned with four or five brown spots ; wing-ribs
pitchy ; veins black ; poisers tawny. Length of the body l^ line,
of the wings 3 lines.

United States.

Walker, List of Dipterous Insects in the Collection of the
British Museum, Part HI.

Page 645. Psilopiis delicatiis, n. s., Fern.

Yiridis, gracilis, abdomine aureo-viridi, autenuis fulvis, articulo
tertio nigro, pedibus flavis, alis limpidis.
Body slender, bright green, clothed with black hairs and bris-

Jl: '•

''(•jr.

m
m

AI'l'F.NKIX.

305

lies; crown (if tlic Iicad liliic ; vyv> hri^Iil ri-d ; inoiitli yi Ilnw ;
(ccltTs tawny ; tliinl joint l>lack ; Itristk' lilark, shorter tinin llio
clicst ; alMlnnn'ii ^oldi'ii-jrn'cii ; ley's pale yellow, lonjr and slender,
clotluMJ with short hiaek hairs ; I'eet jiitehy l(»wards the tips ; \\in<rs
colorless ; winjr-rihs and pidsers tawny ; veins pitchy, liength of
the liody J] lines, of the winirs ."> lines.

(I. New ^'ork. I're.-ented liy the Kntoniolotrieal Cliil).

b. New York, rresenled liy !•]. I)oiil)leday, Ks(|.

Pagt' fj4tj. l*silo|»UA Ki' III mi for, n. s., .Mas.

Viridis, cyaiieo pnrpwreiMpie varins, aniennis niLTis, pedihns
Ihivis, alls limpidis, costi\ apicem versus nervisipie transversis
fusco-iieliulosis.

l)ody l»ri,ij:ht frreeii, l)eset with hlaek hairs and liristles; head
covered in front with silvery down; i'yvs red; mouth tawny;
feelers lilack, as loiijr as the head and the chest, disk of the chest
l)hiish-j!-i'een, tinu'cd with purple; scutcheon purple; sides and
lirea>t covered with silvery itlooin ; ahdoineu slender ; tip hlinsh
jnirple ; appendajres dark tawny; leji's yellow, lieset with hhick
hairs and bristles, which are most thick on the feet ; four hinder
idps {ireeii ; thi<>iis clothed with white hairs; feet towards the tips
aiul liind feet pitchy; wiiiirs colorless, clouded witli pale hrowii
towards the tips of the fore liorders and aloiiy the cross-veins ;
win,!r-ril>s tawny ; veins l)lack ; jjoisers tawny. Leii<,^th of the
liody 2.7 line.-;, of the win^^s f)^ lines.

a. Trenton Kails. Presented l»y E. Douhleday, Ks(i.

Page ti4i). I'Milopii^i clirysoprasi, n. s.

Aurco-viridis, capitis vertice jturpiiren-cyanco, scutello nl)(h)-
ii)iuis((ue basi })urpureis, alMlominis segmentorum suturis seneo-
jjurpureis, antennis ni<i'ris, )»edil)us )»iccis, fcin(»ril)us viri(!il>us,
tibiis aiiterioril)us tarsiscpie anticis fulvis, alis suljcinereis.

Body frolden-<rreen, beset with Idack bristles ; head purplish-
blue on the cruwii, slifrhtly covered with white down in front ;
eyes bright red; mouth and feelers black; scutcheon purple; ab-
(louieu adorned with purple towards tlie base ; sutures of the seg-
ments brassy-puri>le ; legs pitchy, tlnckly dotlied with short l)lack
hairs ; hips and thighs green ; liijis slightly covered with white
bloom, thighs fringed with white hairs ; fore shanks ])ale tawny ;
middle shanks and fore feet dark tawny ; wings sllgiitly gray ;
20

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DII'TKIIA OF NnllTH \MKHirA.

f I'AKT 3:

win}r-ril)s mid poisiTs ])itcliy ; veins lilm-lv. T,fiijftli )f tlio hotly i
li'ifs, of tlic wiii^rs 4^ lines,

a. West Iiidii'S. Kroiii Mr. CliiMrcii's collcclioii.

Tngft (i48. INilopilH Niiuvilllil, n. n.

A'lridis, ('ii|>ilis vcrlicc cviiiico-iinriiiirco, nltdoiniiic npicctn \vr-
sii> iiiirpiirco, uiitciniis iicdiliuscjuc nigris, fi'iiiuribus viridibiis, ulis
liiiipidis, I'lisco hifnsfiatis.

IJody brijrlit jrrccn, Iic^ct with lijnck liristlcs; liciid lijiiisli-inir-
j)l(' on llic (Town, clotlicd wiiii wjiitc down in IVoiit ; eyes red ;
intMilli jiitcliy ; rccjcrs l)liick ; Itristli' nt'iirly i»s loiii; us tlie clicst ;
breast iind sidos of liie cliest eovered with a white bloom ; hImIu-
nien purple towards the tip; Icjrs l»luck, beset with black hairs and
liristles; hips and Ihi^-'hs j^reen ; hips eoveretj with a white blonm;
thijrhs clothed with white hairs; winjrs c(»l(»rless, adorned with two
brown ImiimIs, which art' joine<l tojreiher on the lore border iind
more sliu'litly on the disk, but do not reach tin; hind border nor

xi i • .......11.1 ! ..:i 1 : !. 1 .. T . . I !■

» , ., r.

UKU'e sliu'htly on the disk, but do not reach the hind border noi
the tip; veins black ; winj;-ribs ami poisers pitchy. Leng'th ol
the body 2}; lines, of the winjrs o lines.

«. .Famaica. From Mr. (Jrosse's collecti'"'

Page (>48. PsilopilH ailiatlis, n. »., Mn». et Tem.

Yiridi.s, eajtitc ])urj»ureo, abdomine nijrro-fasciato apice pur-
puroo, antennis nifrris, i)edil)ns pioeis, feniorilius viridibiis, alis siib-
cinereis, costfi ajticeni versus nervisipie traiisversis I'lisco nobulosis.

Hody britrht g-rceii, beset with black hairs and I)rist]es; head
]»Mr))le, covered in front with white down ; crown of the male
adorned with a frreon s])ot on each side ; eyes red ; mouth and
feelei black ; bristle a little slnu'ter than the chest ; hind ))art of
the elicst tinjred with blue and juirple ; sides and lireast covered
with white down ; abd(»men at the tip ])urple in the male, bluish-
purple in the female ; hind liorders of the sejrnients in the male
adorned with black bands ; loffs pitchy, beset with ))lack hairs and
bristles ; liii)s and thijrhs green, the former covered with white
down ; wiiifjs slitrhtly gray, indistinctly marked witli brown towanis
the tips of the fore borders and along the cross-veins; wiiig-ril»s
l^itchy ; veins black ; poisers of the male pitchy, of the female
tawny. Length of the body H — 1 f li'"', of the wings ;i;J — 4 lines.

n. New York. Presented by K. Doubleday, Ks(|.

b. Trenton Falls. Presented by E. Doubleday, Esq.

AIM'KNKIX.

rn^e r)4:>. INilopUH iiidcltiis.

v)^

n. ».

Viridis, cnpito iiiirpiirro, iilidDiiiiiM' iiiir|»mrn,* iilMlniiiin(> pur-
piirco-ryiiiiro. lusriis iiit'ris, aiiti'iiiiis |»('tliljiis(|iit! iiivjris, iilis siili-
cincrfis I'liscd Itifiisciutis,

llcinl iiiitl clirst Im'scI willi lilin'k lirisllos ; liciid ]iiir|ilt', IViiiLrid
iili.tiil tlic inoiilli will) lioarv liiiirs ; eves dmI ; iiioiilli niid t'ci'lriN
Idiu'k ; l)rihtle ii litllc Innircr tlniii tlic clit'st ; clicst frrccii ; sides
utid Itrciist cuviM'cd witli \vliiti>)i down; niidniiicii d<'i'p piirpHsli-
liliic ; siitiircs of llic sf'L'iiH'iits Itlack ; It'u's Mack, clutlifd with
black liairs and Itristlcs; \viii<:s f.liu-litly jri'ay, aduriicd witli (wd
Itmwti l)aiids, which are united on tiio fore bonier, l»ut do not
reach tlie hind liorder; winir-rilts and veins I)lack ; poisers pitchy,
with tawny knobs. licnjftli of the body 2,1 lines, of tiie winj^s f) lines.

a. Mexico. I'resejited liy K. I*. Collin, Ksi].

Page ortO. PhiIoimih iiiKrofciiiorHtiiH, MSB.

Cyaiii'o-, ant anreo-viridis, aniennis ni^rris, eapite dupio loniri-
oribns, pediltus nijrris tibiis fnlvis, alis linipidis.

Head and chest briu'ht Idnish-frreen, aniie(l with black bristles;
head covered in front witli white down, elotheil l)eneath with whito
hairs; eyes red; month tawny; feelers black, abont twice the lenirlh
of the head; l>reast and under side of th<' abdomen covered with
white bloom; al)domeu jrolden-preen, blue at the base, cop|)ciy at
the tip ; le<rs Idack, beset with a few black bristles ; shanks tawny,
with black tips ; winu-s colorless ; winjr-ril)s tawny ; veins black ;
poisers yellow. Leiijrth of the laidy ]\ line, of the winu's ^h lines.

Var, 3. Chest golden-frreen, bluish-urreen behind; abdomen
coppery-jrreeu ; tips of the thigh.s and the whole of the shanks
tawny.

Var. y. Abdomen l)ri^ht irreeii or l»liii.sh-frreon ; a bronze band
on the fore border of each se^nnent.

(I. North America. Presented by the Kntomolofrjcal Clidi.

b. Nova Scotia. From Lieut. Hednmn's cMjllei'tioii.

Page Cni. PsilopiiH albifoxa Mas. ct I'V-m.
Cyaneo-, ant cupreo-viridis, antennis niu'ris, capile dnplo loiiiri-
oribus, ])edibus flavis, tarsis jtostieis nijrris, alis subciiiereis.
Head and chest armed with l)laek bristles; head I)luisli-}i-reen,

)-'i .

^- 'MM'^

f^;-

* Evidently a inisjniiit in the original.

n

'

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w

III

308 KirTKRA OF NOllTFI AMERICA. [PAUT tt.

covered in front witli white down, clothed beneath with wliile luiirs ;
eyes red; nioutii tawny; feelers bhick, about twice the leiigtii of
liie head; palpi black ; chest of the nmie bliiish-g-reen, sometimes
black towards tlie tip, of tlie fcnuiie )>rigii( green or coppery-frreen ;
sntiires of the setrments sometimes black; breast and under side of
the al»donien covered with white (htwn ; legs yellow, adorned witli
rows of minute spines, clothed with a few white liairs, and beset
with a few black bristles; four hinder lni)s frreen ; tips of feet
black; hind feet black, first joint brownish ; wings slightly frniy,
wing-ribs tawny ; veins black ; poisers yellow. Length of the
body 1:J line ; of the wings 2}j lines.

(I. North America. J'resented by tlie Entomological Club.

/>. Ohio. Presented by the Entomological Club.

c. .Massachusetts. From Prof. Sheppard's collection.

(f. Nova Scotia. From Lieut. Hcdnum's collection.

Page (i5L Clirysof ilH inccrtlis, n. s.

Yiridis, antennis nigris, femoribus viridibus, tibiis fulvi.s, apice
tarsis(pie obscurioribus, alis limpidis.

Allied to C. femoral iff. JJody green, beset with black hairs and
}»rlstlcs; eyes red; nn»\ith and feelers black; hips and thighs
green ; shanks tawny ; feet and fi])s of shanks dark tawny ; wings
colorless; wing-rii)s pitchy ; veins black ; poisers tawny.

a. United State- Presented by the Entomological Club.

Page (if)."?. I>or|»liyi-o|is pilosicornis, Rarnston's MSS.

yEneo-viridis, antennis nigris, pedibus fulvis, tarsis piceis,
femoribus posticis apice fnsco nuicnlatis, alis limpidis.

IJody brassy-green, beset with black bristles; eyes dark-red;
mouth dark tawny; feelers black; bristle downy, proceeding from
the base of the third joint and more than twice its length ; breast
an.d sides of the chest covered with a white bloom, which ajipears
also on the chest, but is there very slight ; legs tawny, clothed
with short black hair, beset with a few black bristles ; feet pitchy;
a small brown mark on the tip of each hind thigh ; fore hips at
the base ami the other hips green and covered with white bloom;
wings colorless ; wing-ribs tawny ; veins black ; poisers yellow
Length of the body \^ line; of the wings 2i- lines.

a. St. Martin's Kails, Albany llivcr, Hudson's Bay. Presented
by G. IJarnston, Esij.

ArPKXDIX

30!)

Page (!.'),'■). IVIedoteriiH ^labcr, Baunston's MSS.

"\'iri(lis, lliKi'iK'is disco iiij:;r(»-ii'iu'(). iilKloiiiiiie ai'iu'o-viridi, iiiittii-
nis nijjris, pcdihiis viridibus, tjirsis iiigris, alls cincrcis, I'lisco hiiiia-
ciilatis.

l><Mly •jrn'oii ; liend mid clicsf Ix'sct willi a lew Idack liairs ; head
covered with wldto Itiooui in llie male, witli li-oideii hlooiii in tlie
leiiiale ; eves red; iiiontli and feelers Mack; disk of tiie cliest
l)ron/.e-l)Iaek ; sides covered with tawny hlooni ; hrcast covered
with whit(! hlooni ; alidonien I)rassy-jrreen, covered aliove with
short tawny hairs; under side covered with white lth)oin ; Icu's
l)r!,u-ht <;reen, rather stont, <'h)thed with short Mack hairs and
bristh's ; liips covered witli wlntc )ih)oni ; feet hhick ; wind's liTay ;
eael) with two small ))r(twn s]>ots, one on tiie cross-vein, the other
on the fourth lonu-itndinal vein, u little before half the di.-tane'j
between the cross-vein and the tipof the win^-; winjr-rilis piteliy;
veins black ; jjoisers tawny. Lenjilh of the body 1.^' line; of the
win;j^s r> lines.

o. St. Martin's Falls, Albany ]Jiver, Ilndson's IJay I'rcMiitod
by (1. IJarnstoii, Es(i.

ill'

m:

Page G5r). IHeiR'tei'lIs elirysolomis, Rahnston's MSS., Vem.

Ni<;ro-aMieiis, antennis niirris, ))edil)us viridibus, tarsis idjjfris,
alis cinereis, fnsco biinacnlalis, ad costam subfuscis.

IJody brassy black ; head coveri'd with n'olden l)looni, which is
jniler and l)riirhter tctwards themo'.ilh ; eyes dark-red, covered with
white down ; moutli and feeh'rs black ; sides of the chest covered
with tawny bloon\ ; lireast and under side of tlw; al)dome)i adorned
with white l)looin ; a row of black ))nnctnres on each side of
the abdomen, as in other species; leirs green, clothed with Idack
hairs and bristles ; hips and thiirhs covered with white Idooni ;
feet black; winirs <ii'ay, l>rown aloni; the fore borders, each with
two darker brown si)ots, like those of Jf. (jhihfr, lait larj;er and
more distinct; winir-ribs tawny; veins black; poisers j)itchy.
Leiifrth of tlie l)ody 1 j line ; of the wiiiirs W lines.

,7. St. Martin's Falls, Albany Uiver, II udsou's Day. Proacntecl
by G, JJarnston, Esq,

wwr,

DIPTKUA OF NOKTII AMERICA.

[I'Aiir II.

ill

rage (i'lG. Ulc'tleterus ulboflorens^, n. s., Fein.

^Eiit'us, fulvo ])ul)e,sec'iis, siibtus ull'us, alKloiuino ciiprco-viridi,
aiiteniiis iiigris, pedibus viridibus, tui'sis piceis, alis ciiiercis fuseu
sidtvittatis.

Jload and chest bronzed, beset witli a few black l)ristles, thickly
covered with tawny bloom ; eyes dark red, covered with wliiu-
down ; mouth and feelers black ; abdomen rather light jirecii,
mingled with copper-eolor, thinly clothed with short black hairs,
not longer than the chest ; hind chest, breast, and under side (if the
ai)d(»men covered with white bloom ; legs long, slender, green,
slightly covered with tawny bloom, ])eset with short black hairs and
liristh's; I'eet pitchy towards the tips; claws black; foot-cushions
pale yellow ; wings gray, very slightly cloud.-d with bnjwn along
the borders of the veins; wing-ril)s pitcli\ ; \cisis black; poisers
tawny, pitciiy, and covered with white bloom towards the tips.
Length of the body 1 ;',-!. y line; of the wings 4-4^ lines.

a. Nova Scotia. From Lieut. Rednuin's collection.

m

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Page C'lO. I>olicllopus aflillis, IIaliday's MSS., Mas. et Fern.

Cyaneo-, aut cui>reo-viridis, antennis nigris, pediims (lavis, femo-
ribus posticis tarsisque fulvis, tarsis anticis, mari. apice nigris
dilatiltis, tarsis posticis nigris, alis limpidis.

_}[(il('. — Head and chest green, armed with stout black bristles ;
head fringed behind with pale tawny hairs, covered in front and
beneath with white bloom; eyes red, covered with white down;
feelers black ; chest bluish-green on the disk ; abdon; n .-oppery-
grecn, clothed with short black hairs, covered with v\ iiit' iiUiom
l)eneat!i anil on each side, where there is a row of black j»u('( utes;
appendages ])ale yellow ; legs yellow, clothed with short black
liairs ; four hinder hii)s green ; hind thighs tawny, furnished with
a few tawny hairs ; shanks and feet armed with lihick bristles ;
feet tawny, darker towards the tips; hind feet black ; tips of fore
feet black, widened ; wings colorless ; wing-ri js and poisers yel-
low ; veins i)itchy.

lu'mole. — IJody coppery -green ; legs tawny; shanks darker
than the thighs ; hind feet pitchy. Length of the body 2-2^ lines;
of the wings 4-r) lines.

a. Nova Scotia. From Lieut, llcdmau's collection.

AI'PKNDIX.

nil

Page 600. Doliclioiilis cil|>l'iilUH 7 Wii-n., Aniss. Zweif. ii, 230, 1.
D. ctipreiis ? Say, Joiini. Ai-ad., I'hila., iii. 8, (J.

Aureo-viridis, tlionuc vittis tri'tuf cupivis, aiiteiuiis fulvis apico
fu.sei.s, pi'diljiis (lavis, larsLs apico iiiyris, aiilicis aiiice iiigro-fasoi-
t'ulati.s, alis suliciiioreis.

JJixly {^riH'ii, c'ovt'i'od above with jroldcn rlown, hcncatii witli
■white down; head and chest armed with stout I)laek l)risties ;
Iiiiid part of tlie iiead Iriiijifd witli white hairs; eyes red ; iiioiilii
yellow; feelers tawny, covered with short l)lack hairs ; tlieir tips
brown ; bristle pubescent, pitchy, lon^'er than the rest of the
feelers ; chest adorned with tiiree coppery stripes ; abdomen
g-olden green, ehjthed with short Itlack hairs, white l)enealh and
on each side, where it has a row of Itlaek pnneiun's ; appendages
yellow; legs yellow, ehjthed with black hairs; four hinder hii»s
green; feet towards the l)ase and shanks armed witii Idaek l)ristles;
four hinder feet black towards the tii)s ; tii>s of fore feet adorned
with tufts of black hairs ; wings slightly gi-ay ; wing-ribs tawny ;
veins pitchy ; poisers yellow. Length of the body "J.V lines ; of
the wings ;") lines.

a. St. Martin's Falls, Albany River, Hudson's I>ay. Presented
by (ir. Barnston, Esq.

Page (Ji;0. DoIicllopilK laniellipes, Bak.nston's MSS., Mas. et Fern.

Yiridis aut viridi-cupreus, abdoniine sul)tus allto-pubescente,
antennis nigris ))asi I'idis, articulo tertio niuri. longo, pedil)us
fulvis, tarsis nigris, interniediis basi fulvis, auticis }iiari. apicu
dilatatis, alls linipidis.

Body green ; head and chest armed with black bristles ; head
covered with silvery down, fringed l)ehind with black hairs ; eyes
red ; mouth tawny ; feelers l)lack ; lirst joint jiale red ; third joint
very long ; abdomen chjthed with black hairs, adorned wdh a
coi)pery tinge towards the tip, which is I)liick. covereil with white
bloom l)eneath and on each side, where there is a row of black
punctures; legs i)ale tawny, four hinder hips green, clothed with
black hairs and bristles; feet black; tips of fore feet widened;
middle feet tawny towards the base ; wings colorless ; wing-ribs
tawny ; veins pitchy ; jutisers pale tawny.

Fi'inalc. — Third joint of the feelers short, nearly round.
Length of the body 2^—3 lines; of the wings 5 lines.

'0':,

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DIFFKUA (IF XORTir AMERICA.

[part ir.

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Var. /3. Clicst and abdoiiicn ('(iiipcry.

a. St. ^lartiii's Falls, Albany ilivor, IIirIsuh's Bay. Pri'sou'ad
by G. Uanistoii, Esq.

Page GUI. Dolichopiis ciliatlis, Bakxstos's MSS., Mas. et Tcm.

Viridis, capitis fronte aurco-pubesceiite, aiiteiiiiis fulvis, arti-
t'ulo 3° supra nigro, jx-dibiis fulvis, tarsis piceis alis suhciiiercis.

Body frroen ; head covcrod in front witii frnldcn down ; eyes rod ;
mouth l)lac'k ; feelers tawny ; third joint nearly oval, Iilaek from
near the base to the tip above, and from half its lenfrth to the tip
beneath ; bristle black ; breast and sides of the ehest and of the
abdomen covered with white Ijloom ; ai)])onda<res of the alidonion
tawny; scales white; lefrs tawny; feet ])itehy ; fore feet dark
tawny ; win<rs slisrhtly jrray ; winjr-ribs tawny ; veins black ;
l)oisers yellow. Length of the body 1^-1^- line; of the wings 3
lines.

a. St. Martin's Falls, Albany Ilivcr, Hudson's Bay. Presented
by G. Baniston, Esq.

Page 661. Dolichopii» adjacens, n. s., ppm.

J*]ncus viridi varius, capite cyaneo-viridi, antennis nigris, pedi-
bus fulvis, tarsis posticis jiiceis, alis suljcinereis.

Head bluLsh-green on the crown, covered in front with yellowish
white down, fringed along the eyes with hoary hairs ; eyes red ;
mouth pitchy ; palj)! tawny ; feelers black ; third joint very short ;
chest and abdomen In-assy, mingled with gi'ceii ; breast and sides
of the chest covered with gray bloom, wliich also api)ears beneath
the abdomen, but is more slight ; legs tawny ; hips green, covered
with gray bloom ; fore hips mostly tawny ; feet darker than the
shanks, especially towards the tips; hind feet pitchy; wings
slightly gray ; wing-ribs and poisers tawny ; veins black. Length
of the body 3 lines; of the wings fi lines.

a. St. Martin's Falls, Albany lliver, Hudson's Bay. Presented
by G. Barnston, Esq.

Page 661. Dolichopiis coercens, n. s., Mas.

Tiridis, capite cyaneo-viridi, thoracis lateribus cupreo et cyanro
ornatis, abdomine cupreo vario, apice nigro, antennis nigris, pedl-
bus fulvis, alis limpidis.

;'.soiiic(i

APPENPTX.

313

Head 1)luish-jj:roon, covered in front with pale tawny down,
frinjred along; the eyes with white hairs; eyes bright red; nionih
pitchy ; i'eelers black ; third joint very short ; chest <rreen, sliu'Iitly
tiii,i::(Ml on each side with blue and c<)i)])er color; disk sonietinies
bluish-green ; breast covered with hoary down ; abdomen green,
with a coppery tinge here and there ; tip black; appendages pale
tawny; scales white, bordered with black; legs tawny; hips,
towards the base, green, and covered with a white bloom ; shanks
beset with black bristles ; feet pitchy towards the tips ; fore feet
slender, jtale tawny ; their tips black, and much widene<l ; wings
colorless ; wing-ril)s and poiser tawny ; veins black. Length of
the body 3 lines; of the wings oh lines.

a. Xew York. Presented by the Entomological Club.

r., ■'■(;

■ ■ ' .' * ■

"■It .; i :

Page G62. Dolicliopus fiiiitus, n. s., Mas-

Tiridis, thoracis lateribus abdominetjue cupreo variis, hujus
lateribus basi eyaneo-viridibus, antennis nigris, pedibus fulvis,
tarsis apice uigris, tarsis auticis apice latis, tarsis posticis nigris,
alls subcinereis.

Body green ; head covered in front with white down ; fringed
along the eyes witli White hairs ; eyes red ; mouth pitdiy ; palpi
tawny; feelers blark ; third joint rather large; chest with a slight
coppery tinge mi each side, which, like the breast, is slightly
covered with hoary bloom ; abdomen tinged with coppery color,
and with a slight blue hue on each side towards the base ; append-
ages at the tip tawny ; scales white, bordered with black ; legs
tawny, middle feet towards the ti|)s, and hind feet, excepting tiie
base, black ; tips of fore feet black and somewhat widened ; wings
slightly gray, wing-ribs and poisers tawny; veins j)itchy. lu'm. —
Feet black, tawny at the base. Length of tlie body 3 lines ; of
the wings 5 lines.

a. New York. Presented by the Entomological Club.

hW-

Page 662. DolichopiiH distractiis, n. s.

Yiridis, abdomine cupreo, antennis nigris, articulo 1° subtus
fulvo, pedibus fulvis, tarsis apice piceis, alis subcinereis.

Body green ; head covered in front with white down, clothed
on each side of the eyes with white hairs; eyes bright red ; feelers
black ; first joint tawny beneath ; third joint short and broad ;

,1 -■■■^

; 1

■ ' M'

"If

314

DIl'TEUA OF NOllTII AMKUICA.

[part ir.

alxlonion copper coIoixmI ; lof^s tawny ; fi'ot piteliy towards tlio
tips; wiiius slightly gv'dy, wing-ribs and poisers tawny; veins
Itlack. liungtli of tho body 'Ji linos ; of tlio wings 5 lines.
a. New York. I'resenled by K. Doubleduy, K>i[.

Page G()2. Uolicliopus discei^siis, n. s., Fem.

f'yaneo-viridis, thoraee onpreo bivittalo, abdoniinc aMioo-viridi,
nntcnnis pedibus(iue fulvis, tarsis i)ostieis ])iceis. alis sul)cinereis.

Jiody bluisli-g'''en ; head covered in front with white down ;
eyi's brigiit red; uuth and feelers tawny; bristle black ; chest
ad<triie'l with two l)rigiit copper-colored stripes; sides and breast
covered with white bloom ; abdomen green, brassy here and there,
especially towards the tip ; sides and under side covered with white
down ; legs tawny ; tips of feet and hind feet, except the base,
]>itcliy ; wings slightly gray ; wing-ribs and j)oisers tawny ; veins
black. Length of the body 2}j lines; of the wings 5-^^ lines.

a. Massachusetts. From Prof. Sheppard's collection.

Page (i(>3. Doliclio|iiis contigiiiis, n. s., Mas.

Aureo-viridis, thoraco viridi-cyaneo, lateribus purpureo variis,
abdoniine cyaneo et cupreo vario, antennis nigris, ])edibus fulvis,
tarsis anticis apice nigris latis, tarsis mediis piceis, basi fulvis,
tarsis ))osticis nigris, alis linipidis.

Head golden-green, covered in front with pale tawny down ;
eyes briglit red ; feelers black ; third joint oval ; chest greenish-
bine, with a slight purple tinge on each side ; abdomen golden-
green, slightly bluish and coi)pery here and there ; breast and
under side of the abdomen covered with hoary bloom ; tip black ;
appendages tawny, scales whitish ; legs tawny ; four hinder hips
mostly green, and tinged with hoary bloom ; tips of fore feet
lilack, much widened ; middle feet pitchy, tawny at the base ; hind
feet black ; wings colorless ; wing-ribs and poisers tawny ; veins
])itcliy, tawny towards the base. Length of the body 2 lines ; of
the wings 4 lines.

a. New York. Presented by the Entomological Club.

Page G63. Doliclioiiiis exclusii^i, n. s., Fem.

Cupreus, nonnun([uam viridi varius, abdomine purpureo-cupreo,
antennis nigris, articulo primo subtus fulvo, pedibus fulvis, tarsis
nigris, alis subciuereis.

VM-i

APPENDIX.

315

l»(i<ly fopptT}', soinetiiiios varicil with green ; luad fovcrcfl in
front witli white bhxtni ; eyes red ; month i»itt'hy ; jtalpi tawny ;
I'ooh'rs hhick ; first joint tawny licncath ; tliinl joint oval, as lon<?
us the first and tiie second ; hreast covered wilii jiray l)looni ;
nl)doinen purplisii cojjper-coior, covered henealh with uray lilooni ;
leu's tawny ; hips coppery ; fore hips mostly lawny ; feel l)laek ;
wintfs sliji'htly ^ray ; winir-rilts tawny; veins lilaek ; poisers pale
tawny. Len<;th of tlie Ixidy 2 lines; of the wintis 4^, lines.

a. St. Martin's Falls, Albany Iliver, Hudson's iJay. rrcsented
by G. narnst(jn, Ksq.

Page (it;4. Dolicliopiis coiifiiiis, n. s., 1m-ui.

.Enens, viridi varins, capite viridi, antennis ni^iris, pedibus
fulvis, tarsis pieeis, til)iis postieis apice tarsisipie poslicis nig-ris,
alis cinereis.

]>ody brassy, mingled here and there with g'rceii ; head green,
covered in front with white down, chjthed along the sides of tiie
eyes with white Inurs ; eyes red ; month pitchy ; feelers l>laek ;
third joint nearly oval, rather short; breast covered with white
bloom; legs tawny; feet pitchy, tawny towards the base; hind
feet and tips of hind shanks black ; wings gray ; wiiig-ril)s and
]ioisers tawny ; veins black. Length of the boily '2 lines ; of the
wings 4 lines.

(I. St. Martin's Falls, Albany Kiver, Hudson's IJay. Presented
l)y («. IJarnston, Esij.

rnsH Cii'A. Dolicliopiis conteriHiniis, n. s., Mn».

Yiridis, thoracis disco al)domine(pie aureo-viridil»ns. Inijus apice
UMieo, tntennis nigris, pedil)us fulvis, tarsis antiei> apice nigris
latis, tarsis mediis a))ice ]iosticis(pie pieeis, alis limpidis, /mi.
tarsis ))iceis basi fulvis, tarsis postieis nigris.

IJody brigiit green ; head covered with tawny down, fringed
o.long the sides of the eyes with white hairs; eyes iirigiit red,
covered with white down, niouih ])itchy ; jtalpi tawny; feelers
black; third joint rather large; abdomen and disk of the chest
golden-green ; breast and sides of the chest covered with hoary
bloom, which also slightly tinges the under side of the abdomen ;
tij) of the abdomen brassy ; appendages tawny ; scales white,
slightly bordered with black; legs ])ale bright tawny ; four hind
hips mostly green, and covered with a white bluoui ; thighs friiigod

W': ft

iv.|.

I y.M

H"-*;
•^»i*

VV'.f

\' ':

(

■
• - 1

•!i

310

DTl'TKUA OF NOlVni AMKUirA.

[I'AUT ir.

with wliitc liiiirs, fore fcot .slender, with l)hi<'k ami much widened
tii)s ; mi Idle feel pitchy towards tlie tips; hind feet ]iitchy; winj;
cohjriess ; winj;-ril)s tawny ; veins l)!ack ; j)(Mseis pal(; tawny.
Ft'in. — Feut pitdiy, tawny towards the hase ; hind feet black.
Leii<j;th of the hody 2 lines ; (»f the winjrs 4 lines.

a, New York. J'resented by E. Doiihleday, Ks(j.

b. Xortli America, rreseiited by the Entomological Club.

Page Gijf). DolicliopilH Hepai'utiis, n. s., Fem.

Viridis, abdominis apice cui)reo, autennis fiilvis, articulo tcrtio
apice in<rro, pedil)us fulvis, tarsis nijiris, alls subeinereis.

IJody green ; head covered in front with tawny down ; eyes
red ; mouth pitchy ; i)alpi tawny; feelers tawny; third joint oval,
black towards the tij) ; bristle black; breast, sides of the chest
and under side of the abdomen covered with white bloom ; alxlomen
coppery towards the tip ; legs tawny ; four hind hips green,
covered with white bloom ; feet black ; wings slightly gray ; wing-
ribs and poisers tawny ; veins black. Length of the body 2 lines ;
of the wings 4 lines.

a. St. .Martin's Falls, Albany Klver, Hudson's Bay. Presented
by G. Uarnston, Esq.

i

i- 1

Page 6Cr>. Dolichopiis terminatiis n. s., Fem.

Aureo-viridis, capite cyaneo-viridi, abdomine cu|)reo basi viridi,
autennis nigris, pedibus fulvis, tarsis ])iceis basi fulvis, alls sub-
cinereis fusco subvittatis.

Head l)luish-green, covered in front with golden down, fringed
on each side with white hairs ; eyes bright red ; mouth pitchy ;
palpi tawny ; feelers black ; third joint nearly oval ; cliest golden-
green ; sides and breast covered with hoary bloom, which also
ai)pears beneath the abdomen ; abdomen copper-color, green at
the base ; legs tawny ; four hind hips green, covered with white
bloom ; feet pitchy, tawny towards the l)ase ; wings slightly gray,
indistinctly tinged with brown along the borders of the veins ;
wing-ribs and poisers tawny; veins i)itchy. Length of the body
2 lines ; of the wings 4 lines.

a. North America. Presented by the Entomological Club.

APPF.NniX.

317

Page GCC. Dwlic'liopUH Hoqiiax, n. s.

ryanoo-viridis, thonu'C ii'iieo-viridi, al)(loiuiiiis apicc u'lico, aii-
tciinis fulvis, articulo tertin iiiirro s\il)tus Culvo, peclibus fulvis, tarsis
iiifiris aiitic'is piceis, alls liinpidis.

]Jo(ly bluisli-grec'ii ; lioail covered in front with poldon down ;
eyes red; ni(Mith piteliy ; feelers tawny; tliird Joint black, tawny
l)eneath towards tlie base; bristle black; ciiest with a sli<rht
brassy tinj^o ; breast covered with a hoary bloom; a))domeii
bluish-frreen ; tip bronzed ; appenda^^es tawny ; scales wliite,
with dark borders, under side slightly covered with hoary bloom ;
lejrs tawny, feet black; fonr hind liips mostly frrcen, covered with
white down ; middle shanks with a slijrht tuft of black hairs at the
base ; fore feet pitchy, tawny at the base ; winjrs colorless ; win<r-
ribs and jjoisers tawny ; veins black. Length of the body 1 -j line ;
of the wings 3 lines.

a. St. ^Martin's Falls, Albany River, Hudson's Bay. Presented
by G. IJarnston, Kscj,

Page Wid. Dolicliopus SOCCatUS, IUrnston's MSS.

vEnens, capite viridi, abdomine cnjjreo basi viridi, antennis
fulvis, articulo tertio nigro subtus fulvo, pedibus fulvis, tarsis
nigris, alls sibcinereis.

Head green, covered in front with hoary down, fringed along
the eyes with whitish hairs ; eyes red ; mouth tawny ; feelers
tawny; third joint black, very short, tawny beneath till near the
tip; bristle black; chest brassy ; sides and breast covered with
hoary bloom ; abdomen coppery, green at the base ; legs tawny ;
feet black ; w;r.gr, slightly gray ; wing-ribs tawny ; veins black ;
jioisers yellow. Lengtl of the body IJ line ; of the wings 3|-
lines.

Var. j3. Body brassy, tinged with green.

a. St. ^fartin's Kails, Albany Kiver, Hudson's Bay. Presented
by G. Barnston, Ksq.

Page 663. Dolichopus reiliotus, n. a.

vEneo-viridis, capite thoracisrpie lateribus cyaneo-viridibus, ab-
domine basi viridi, antennis nigris, pedil>us fulvis, tibiis posticis
apice tarsiscpic postici.s nigris, alls limpidis.

urn

11

^1 '

mi

ii:

mi

'

318

mPTKUA r»p NoiiTir amkuipa.

[I'AHT M.

llcnd Iiliiisli-^rccii, clotlicd in frmit with white ilnwii ; friiijrcd
nil ciH'h si(l(! with white hairs; eyes red; rcch'rs hlack ; chest
brassy frreeii, liliiish-frreen (iii each side; l»reast envefcd willi
lioai'y hlduiii ; alidonien brassy, jrreeii at tli(! base, tiiifred witii
j^reen mi each si(h', eovered with wldte bioniii Ix'iiealh ; tip lihiik;
appeiidafres tawny ; scales white, burdei'ed with bhiek ; le^s
lawny; lips of feet jiitcliy ; hind feet and lips of hind shanks
lilaek ; wiiitrs cdlorJess ; wini;-ribs and poisers jude tawny ; veins
bhiek. Lenu'th of the liudy I.', line; of tlie wind's 15 lines.

a. North America. Presented by llie Kiiloni(doj>-ical t'hil).

j

I

pi
f

ii

K'

ii

1

I-

Pago (;il7. Dolicliopiis irrasiis, s. n., IVm.

Cyaneus, abihunine u'lieo, aiiteiinis nigris, pedibus fnivis, tarsi*
pieois, alis cinereis fnseo snbvittatis.

liody deep blue, beset with blacK hairs and bristles; head
eovered in front with a silvery l)l(M)ni ; eyes red ; iiioitth a!i(|
feelers black ; eliest covered with fernijfinoiis bloom ; sides and
chest c<»vered with white bloom ; abdomen dark bronze, sli^rhtly
covered with white bloom, not lon<rer than tiie chest ; le<>'s tawny,
clothed with l)lack hairs and bristles; feet pitdiy ; winijs jzray,
lirownish alon<r the borders of the veins; winjf-riljs and vciii»
black; fourth loiifritudinal vein sliirlitly bent; poisers dark tawny.
Len<j:tli of the body 1 line ; of the winji-s 2 lines.

a. Florida. Tresentod by E. I)oul)leday, Esq.

Page G()7. Ortliocliile derenipta, n. ».

Yiridis, thoracis disco cni>reo. al>doniine ])iirpnreo, Itasi apiceipie
cyianco-viridi, lateribus aureo-viridilms, antennis nijrris. i>e(iibu^
fnivis. fenioribus viridilms, alis siibcinr'ris.

Body trreeii ; head and chest ix'set with black bristles ; eyes
and mouth black ; feelers black ; third joint very short, round ;
bristle proceeding: from its tip ; disk of the chest copper-colored ;
abdomen purple, clothed with black hairs, blnish-n-reen at the
base and at the tip, jrolden-irreen along each side; legs tawny,
clothed with short black hairs; hips and thighs green; wings
slightly gray ; wing-rilis and ]>oisers tawny ; veins pitchy. Length
of the body 1:^ line ; of the wings 3 lines.

a North America. Presented by the Entomological Club.

AI'I'ENDIX.

.'UO

WulLrr, in (hr. Transact inn a nf l/n; Kntomoloijival Hovichj,

Tiun.ir.

Page 149. PsilopiiH iiiiKiilivenn.

.!/(/.«*. — Lii'to viridis, iintt'iiiiis iii^:ris llKtrucc Icmj^ioriliiH, lli(»riwt'
siil)('yiiiu.'.>(<'iit<', iiltddiiiine sulmiinito, pi'dihiis tostiu'cis, iilis siil>-
ciiicri'is, vciiis nijrris.

Male. — IJrijrht gi't'cii ; nntomiiu lilack, iiiiich loufjci* tliaii tlic
thorax; thorax slightly bluisli ; ali(h)iii('ii soiiicwiiat gilded ; hgs
testac'L'ous, long, shMidiT ; wings grayish; veins l)lack, t'ori'-liriinch
of the |»riubra('hia! vein very much IxMit, nearly rectangular ;
discal transverse vein very dee}»ly undulating. Length of the
body 4j, lilies; of liie wings 7 lines.

L'nitcd Slates.

WulLcr, in the 'Transactions of the Entomological Society,

Tovu V.

Pape 287. l*HilO|iiiri solidiis.

F(rm. — Cyanoo-virldis, robustus, subtus albido-toniontosus, aii-
tennis pedibuscjuc ingris, abdoniiuis lateribus basi cupreis, alis
subcinereis, fasciis duabus (P media lata, 2* apicali latissima)
uigris antice connexis, halteril)us testaceis.

Female. — Bright bluish-green, stout, with whitish tomcntuin
beneath ; aiileiin;c and legs black ; alxlomen bright cuiircoiis du
each side at the ' aso ; wings slightly grayish, with a brnad black
band in the middle and a very broad apical black band, the two
bands connected in front ; fore branch of the pra'ltrachial vein
almost rectangular; discal transverse vein straight, ol)li(|nc;
inilteres dull testaceous. Length of the l)ody 8 lines; (jf the
wings 7 lines.

Mexico.

I,.

lit
■)■(■

»

1^ .,

t ■ .

V i :v

i^l!

Page 2S7. P»ilopiis peractiis.

F(em. — Viridis, robustus, snl)tns alltido-tonicntosus, cajiito
cyaneo, antonnis, ))edibus halteril)us(|ue nigris, abilomiiic leiicd-
viridi, alis subcinereis, venis nisris.

Female. — Green, stout, with whitish tomcntuin Iienciitli : head
blue; antenine and legs black; abdomen ivneous-grecn ; winj^s

-.:.;-i!

&JK,

890

i)Ti»TKiiA OF Nonrrr amkuica.

[I'AIIT II.

(rniyisli ; veins l)lack ; forc-brimcli (if the i>nrl)nu'liiHl vein nhtuscly
I'rctniiuiiliir ; discul truiisvrrsi' vein (tl)rK|iit>, nliiiust strui^lil ; lial-
tercs liliick. Loiij^lh of tliu liody 2^ lines ; of tlio wings 4 lines.
Mexico.

Page 287. PMilopiiH hopretlciiH.

Frrm. — I'nr])nreo-niger, latns, nitens, sultlns alitido-toniontnsus,
capite, antennis ju'diltiiscine nigris, ulnloniinu iiigrieuiite imrpureo,
uiis snlieinereis, venis nigris.

Fcmah-. — I'nrplisli-lduek, brond, sliining, willi wiiitisli tonien-
tiini beneath ; head, antennie and legs blaek, the latter rather
Htont ; thora.x rather thickly beset with blaek l)rislles ; altdonnwi
blaekish-j)urple ; wings slightly grayish; veins blaek; fore-branch
of the pnebraehial vein rectantrnlar, but with the angle somewhat
ronnded ; diseal transverse vein obli(jue, nearly straight. Length
of the body 1^ line ; of the wings 3^ lines.

Mexico.

Page 288. PsilopuH pernio 'ciis.

Moji. — Anreo-viridis, gracillinins, antei e(libus(pio flnves-

ocnte albis, nlis linipidis, venis hnlteribuscpie pallidis.

Male. — Golden-green, very slender ; antennie and legs yellowish-
white; wings limpid; veins pale; fore-branch of the prtobrachial
vein obtusely rectangular; diseal transverse vein oblique, straight ;
lialteres very i)ale. Length of the body 1 J lino ; of the wings 4
lines.

Mexico.

I i-

t^

SUrPLEMEXT

TO TlIK

iw

•Mi?

; I'.'t'
; iH

MONOGRAPH ON NORTH AMKRICAN DOLICHOPODIDJ..'

i 11.

I, General liemai'li'ti on the DolichopittUiJiv. of Xorlh America.

That llin Nortli Anuricaii thuiia of Jhilirhn/xxh'dfv is nii vx-
ceeiliiijrly rich one, is proved l»y tliat jiortion of it ii|tiin wiiich I
liavo l»a.s('(l the prc^int jxiljlicatioii. I am satisfied that this fauna
far I'xct'od.s tho Kiiropoaii fauiitt in tiu; variety of forms and in
the number of species.

1 take tlie following,' points to be peculiar to this fauna : 1. Tho
apparently ratlior numerous species of l'c/(is/n)iei(riis; 2. Tlie re-
nuirkahle al)undance of closely allied species of true (/i/mnopler-
hkk; 3. Tho niunher of species of CIiri/Kotua dislinjrnished by a
variety of plastic characters, which is not {renerally the ease in
this genus; 4. The abundance of species of Diii/i/ionit^ and (tf
forms related to this jrcnus. Our kno\vled<re of the <i'enera occur-
ring in North America is too limited, yet, to indicate tho alisoncc
of some of them as l)eing peculiar to tin; fauna.

A very striking circumstance connecte(l with the Xorth Ameri-
can fauna of Jhtlichopixlidie is, that i)recisely in thost; points
which we have just enumerated as peculiar to it, this fauna shows
the most remarkable analogy to the remains of the fossil fauna of
the same family ])reserved in amber. In both, there is the sanu;
abundance of species of genuine (runmoplernus, dillicult to dis-

' The volume had already gone through tlie press when the present sup-
plement '.vas sent in hy Mr. Loew. It contains destriptions of the new
species discovered mostly by me during the smiimer 18(j;5. The (li'ueial
/{(iwirl-s, prefixed to this Supplement, form an important addition to tho
preface of this volume (page iii — vi). 0. S.

21 ( 321 )

j-fe^lj:

in
I

i' :
■ ^

■ P-

'■■III

322

DIPTEUA OF NORTH AMEUICA.

[part it.

tin<j:iiish on account of their dose resemblance; in l)0tli, the same
frecjiK'nco of si)ecie,s of Chri/soliis, and not only the same variety
of plastic Pi)eciric charaeterri anH»n<; ihem, but even a most strik-
in<r conformity in the i^ature of these characters; in both, nume-
rous species of Diaphoruti aiul of forms related to them. A cer-
tain coincidence is even perceptibk among those genera, whieli
hitherto are not represented either in the North American or in
the amber-fauna. It must be added, however, tliat the latter
shows nothing like the great abundance of the North American
fauna in si)ecies of genuine Dolichoput^.

It would be dillicult at jjresent to make any satisfactory state-
ment as to the relation in which the North Auicrican fauna of
JJolichopodithi; stands to that of any^other zoological i)rovince, as,
with the exception of the Euroi)ean fauna, our knowledge if other
faunas is not sullicient for this ])nrpose. Yvom what we know,
however, w(> distinctly perceive that the North American fauna
closely approacln's the Kuropean and the North Asiatic fauna} in
the si)ecies of the genera Ifi/grorcleidhun, DoIicJinjiKu, T(i<-h;/lir-
rhiix, Cnnipsirncmu.t, Scdlns, Jli/draphorux, Ltanraluft, CIii'i/sdH-
7/)«.s, 1 id X<nit/iochlo7'i(K, whereas its coalescence with the South
Anieri an fauna is apparent in the sjjecies of Pa)'arli)(!t, rddntn-
vcurnyt, Li/roncHrttft, and Fl(i'jiiniriiru)^. The species of genuine
Gi/mnoj^tcrnu.'^, so numerous in North America, are l>ut scantily
represented in Europe. The North American species of DiapJio-
riiK agree in i)art with the Euroi>can, in part with the South
American species. The North American species of Argi/ra, {'or-
pJii/roiis, Leucoxtido, and Lioncalus do not show any striking
dillerence from the European species of these genera, but juft as
little from the South American species.

Of such species, as are connnon to Europe and North America,
the following have hitherto conu; uiuler my observation : ])nli-
<'hnpiis brcripr)))i/.-i Meig., D()licJiO])iif< jdioiiipefi Scop., DoJiclu)-
puH (liscifcr Stann., ^Sc(7/»x xjjiiiiinamis Zett., and I'Kilojnm
pnllcns "\Vicd. The first four of these species belong altogetlicr
to specifu' types commonly represented on Itoth continents; but
this is not the case with PsilopiiK ;)f///c».s. This species un(|Ut's-
tionably Ix'longs to the circle of European ty})es of Psi!i)pu.<,
whereas all the North American l\-<iIopu!< at i)rescnt known
closely approach tin; types of their South American brethren. It
seems, therefore, not altogether unnatural to suppose that thin

SIPPLKMKXT.

32;

spocios, wliif'li, aoconlinu,' ti> JJiiroii Osten SackcMi's statoniont, is
not unconiiiion in the lower jkuMs of New York City, should liavc
been accidentally ini}>oi'tcd in siiips from tlie south of Europe.
As species coninion to both continents may perhai)s be also re-
liiirded Pidjtlioriia niijrivona ^lei,<r. and Xtnit/ioc/ilorus li'urlhis
Wied. ; the North American Diiiplidnix o/i(irti.-< niijrht be con-
sidered as identical with the first, XantJiochldnis /icln'ntis with
the second of these species; certainty about this point, liowever,
can <.:dy be accpiired by the dose comparison of a larjrer number
of V ell-preserved spoeimous of the two American species.

II. Description of mmc Species communicole.d after the J'ulitnie
had fjonc thriHujli the Prexx.

Gen. II. DOMC IIOI'I. N.

Corrected Table j'tiv dcU rminiixj tlic Species,
f Prevailing color of the feet black. 2

t Prevailing color of the feet yellow,
f Cilia of the inferior orbit black.

"1 Cilia of the inferior orbit whitish.
,, f Face ochre-yellow.
I Face silvery white.

9

3
4

1 gratiis f.ir,
ry whue. 2 laticornis /.w.

. f First ioint of the hind tarsi with nnmerons bristles. ?> setifer /.»'.
4 s

t First joint of the hind tarsi with a few bristles. 5

, f Hind tibi;c black onl v t the tip, 0

\ Hind tibia) entirely black. 7

f The black color at the tip of the hind tibia> is rati er oxtendeil njid
1 not very sharply limited. 4 albiciliatus /.»•.

j The black color at the tip of the hind tibia) bnt little extended atid
sharply limited. 5 xanthocnemua n. sp.

„ f A considerable extent of the tip of the femora yellow, (i tetricus n. sp.
t The extreme tip of the femora only somewhat yellowish. 8

„ f Lamella) of the hypopygium pointed.

I. Lamellic of the hypopygium rounded ovate.
„ j Cilia of the inferior orbit black,
t Cilia of tht! inferior orbit j- lie.
,,. f Fore coxa) blaidcisli.

' Fore cos.x' yellow.
,, f The first two joints of the antenn-e yellow.

' 'i'he whole antenna) black.
,(, f Tecnlic with pah^ cilia.
" t Tegulie with black cilia.

7 acuminatus r.w,
i- ovatus /.((•.

10

12

0 pachycnemuB f.ir.

11

4:? dorycerus f.ir.
10 brevipenuis .lA /</.

13
2({

nm m

:ii;i!i

ill

i ■ 4

t i^

nm

hit

, ; ■ 1'

r ■

1

1 ;

1

1 ':

1

i

„,_

324

DIPTERA OF NORTH AMERICA.

[part ir.

,Q f Antennc-B black, at the utmost tho first joint almost yellowish-red. 14
I Antennte, altogether or at least their larger portion, yellowish-red. 24

■,, f Fore coxflB dark at the base, beyond the middle. 11 longimanuB f.w.
I Fore coxae pale. 15

,, / Tip of the hind tibire distinctly black. 16

I Tip of the hind tibiae not, or very slightly infuscatcd. 17

,„ / Fore tarsi only ferruginous-brownish. 12 brevimanus f-w.

«■ Fore tarsi blackened from the tip of the first joint. 13 socius I^w.

.._ f Hind tarsi entirely black. 18

I Basis of the hind tarsi to a considerable extent pale. 22

f Hind femora of the male not ciliated. 14 nudus Lm.

IS

19

I Hind femora of the male ciliated.

19

The enlarged last joint of the fore tarsi of the male on the outside
with a white reflection. 45 palaestricus Lw.

The enlarged last joint of the fore tarsi of the male on the outside
without a white reflection. 20

16 splendidus Lw.

21

21^

nr. t Hind femora of the male very densely ciliated.
t Hind femora of the male sparsely ciliated.

•Hind tibiae not infuscated at the tip ; the fourth joint of the fore tarsi
of the male somewhat broader than the preceding.

44 splendidulus Liv.
Hind tibiae somewhat infuscated at the tip; the 4th joint of the fore
tarsi of the male not broader than the preceding.

If) siibciliatus Lw.

f Only the last joint of the fore tarsi of the male enlarged.

•22 J 17 batillifer /.«'.

\- The two last joints of the fore tarsi of the male enlarged. 23

no ( Hind femora of the male ciliated. 18 eudactylus Lw.

IS) tonsuB Lw.

20 teuer L.w.

25

2i variabilis Lm.
22 luteipeunis Ljr.

27
31

23 ramifer Iau.
28

( Hind femora of the male not ciliated.

o , ( Last joint of the fore tarsi of the male enlarged.
( Fore tarsi of the male plain.

25 ( Wings hyaline with a grayish tinge.
* Wings hyaline with a yellowish tinge.

{

27 1

2,. } Fourth longitudinal vein broken.

28.

29

Fourth longitudinal vein not broken.

Antennae black.

Anteiniae yellowish red.

Fourth longitudinal vein broken twice at right angles.

24 bifractus Lav.

The lower angle of the fourth longitudinal veiu sharp, the upper one

roumled. 2!)

( Tarsi of the male i)lain. 25 vittatus L.w.

\ Fore tarsi of the male enlarged at the tip. 30

SUPPLEMENT.

325

30

31

Hind femorn, of the male cilLated. 2G cuprinua M'ivd.

Hind femora of the male not ciliatefl. 27 longipennis /.»■.

Antennae red, at the utmost the third joint at the tip, or its hirger
portion, blackened. 32

I Antenn.'c black, at the utmost the first joint, in part, red. 39

„(, f Humeral callosity of the same color as the dorsum of the thorax. 33
( Humeral callosity yellowish. 3S

Arista of the antenna? of the male very much enlarged ;it the tip.

28 hastatus f^w.
the antennre of the m.ale plain. 34

Last joint of the fore tarsi of the male not enlarged. 35

joint of the fore tar.si of the male enlarged. 3G

First joint of the middle tarsi of the male feathered.

2!) plumipes Scoji.
' First joint of the middle tarsi of the male not feathered.

3(1 fulvipes J'W.

("Last joint of the fore tarsi of the male with a lamelliform appendage.
I 31 sezarticulatus Lw.

op I

} Last joint of the fore tarsi of the male without lamelliform appendage.

33

34

/ Arista of

V Arista of

( Last joii
( Last joii

I'
1'

L

37

38

39

Last joint of the fore tarsi of the male small.

Last joint of the fore tarsi of the male large.
( Fore tarsi of the male plain.
I Fore tarsi of the male enlarged at the tip.
( Antenna) entirely black.
\ Firs

37

32 ruficornis /-»•.
4(1 lobatus /-v.

33 Bcapularis /.»•.
34 funditor A»'.

40
43

41
42

35 chrysostomus f.u;.
4(i melanocerus Lw.

irst joint of the antennce partly red
.« ( Hind femora not blackened at the tip.
( Hind femora blackened at the tip.

• ^ ( Hind tibiae not blackened at the tip.
I Hind tibite blackened at the tip.

' Anterior femora without dark streaks on the under side.

37 comatUB Lw,
Anterior femora with dark streaks on the under side.

3G prseustus Lie.

{First joint of the hind tarsi yellow, with the exception of the tip. 44
First joint of the hind tarsi entirely black. 45

'Lamellte of the hypopygium ochreous-yellow, not double.

38 Bcopariua Lir.
Lamellae of the hypopygium ochreous yellow, double, tliat is, having
an inner pair of fiabs besides the outer ones.

47 quadrilameUatus Lu:

f Tips of the hind tibiae at the utmost somewhat blackened on the in-

45 1 side. 4A

I Tips of the hind tibiae distinctly black. 47

42

43

44-^

ilf

^

S" j^^

■„i '■

■: S.

i ;?

'■W-liu.^

I<

I*

It i'

I,

32G

DIPTERA OF NORTH AMERICA.

[part II.

("The first joint of the antennae red on the under side only.

3!) discifer Lw.
[ The first joint of the antenna} red, witli the exception of its upper
^ side. 40 lobatus Lw.

' Ilind tibioD of the male with bristles of unusual length.

41 setoBus Lw,
Hind tibite of the male with bristles of ordinary length.

4*2 incisuralis L.w.

47^

43. D. dorycerus Loew. % . — ^Tilneo-viridis, oculorura tegularuraque
ciliis nigris, priniis duobus antennarum articulis, coxis anticis pedi-
busque saturate flavis.

% . Sets, antennarum lamellifera, tarsorum anticorum articulis ultimis
quatuor dilatatis, atris.

?

Metallic green ; cilia of the posterior orbit and of the tegulje black ; the
first two joints of the antenna?, the fore coxae and the feet saturate-yellow.

'J, . Arista expanded into a lamella at the end, the last four joints of the
fore tarsi enlarged, deep black.

9

Long. Corp. 0.26. Long. al. 0.26.

Syn. Dolichopus dort/cerus Loew, Berl. Ent» Zeltschr. VIII, 93, 85.

Male. Bright, bronzc-grecn, usually with extensive coppery-
rod reflections. Antenna; small ; the first and second joints,
which are very much obliterated, of a saturate-yellow color ; the
third joint, which is round, and the arista, black ; the latter bears
at its tip an elliptical black lamella. The face more ochre-brown
than ochre-yellow ; the cilia on the posterior orbit altogether
black. Hypopygium black ; the lamellos of middling size, dingy
white with a rather broad black margin, jagged on tlie edge and
beset with black bristles, on the upper margin with black hairs.
Fore coxa) with black hairs. Feet saturate-yellow ; hind femora
before the tip usually with two, sometimes with one l)ristle ; the
hind tibiie have upon their hind side, before the middle, a small
brown callus, and are blackened at the extreme tip on the Inaide-
Fore tarsi about as long as the tibia) ; the first joint slender, stalk-
like, considerably longer than the following four joints together,
dark yellow, blackened only at the extreme tip ; the following

Sll'PLEMKNT.

327

four joints vclvot-hlark, strongly coinprcssod from tlic sides ; the
three hist ones are expanih'd on liie u}>i»er side into long lobes,
which are velvet-ltlack on tin; third and fourth joints; on the
liftl. joint tlio lolte is hlaek only at the baso, otherwise* whitish.
JSIiddle and hind tarsi, from tho tip of the lirst joint, )j!avk.
"Wings grayish-hyaline with dark-hrown veins, tinged with elay-
ish-yellow ii! the costal, marginal, and sul)n)arginal cells, the
C(jsta only slightly iiicra>sated at the tip of the lirst longitudinal
vein; the tip of the third longitudinal vein strongly ilellected
backwards ; the last segment of the fourth longitudinal vein not
broken ; the posterior margin of th(! wing has a deep sinus before
the unusually }»rotruding anal angle ; the latter is again siuiuited,
so as to api)ear bilolx-d.

Ildh. Glen-llouse, White Mouutaius, New Hampshire, July
2, 1803. (Osteu-Sacken.)

44. D. spleildiflullis Loew. %. — Viridis, nitidus, coxis anticis
pediliuscjue flavis, tibiis postiuis totis concolorihus, iintcnnis tarsisijue
postieis iiigris, ciliia ouuloiuin iiiferioiibus tegiilarimniue ciliis ttavi-
caiitibus, alarum vena Inni^itudinali quarta noii fiacta.

^. Tarsis aiitii'is eloiitratis, articulo quarto pra;ceilentil)us latiore, quinto
compr«sso atro, femoribus postieis minus coiifertim tlavo-ciliatis.

9

Green, shining, fore coxhb and feet yellow ; the hind tibire not hhickened

at the tip ; antennjo and hind tarsi black ; cilia of the inferior orbit and

of the tegulfe yellowisli.
%. Fore tarsi elongated, fourth joint broader than the preceding; the

fifth joint laterally compressed, black ; hind femora ciliated with rather

sparse yellowish hairs.

9

Long. Corp. 0.22. Long. al. 0.22-0.23.

Syx. Ihlichiqnts splfinlidulus LoEW, Berl. Ent. Zeitschr. VIII, 91, 82.

JFdJe. Metallic green, bright, shining. Face rather bright-
yellow. Anteiui!T2 altogethir black ; the third joint short-ovate.
Front shining green. Cilia of the inferior orbit pale-yellowish.
Lanii'ilu' of the hypopygium broad, ovate, whitish ; on the upper
and the apical nmrgins with a very narrow blackish border; ajjical
margin jagged and beset with bhick Ijristlc. The four hind coxai
are l)hickish, only at the extreme tip yellow. Fore coxa' yellow,
somewhat blackened oidy at the extreme basis, beset with short

^ rn'

m

' 'mi'

328

DIPTERA OF NUUTII AMEIIICA.

[PAIIT II.

■■>''y\

Nlii

black littlo hairs almost upon the whole front side. Poet yellow.
The hind feinora Ix-fore the tip wi h a hristle, upon the greater
part of 'h(^ under side sparsely ciliated with ratlua* l<»ng yellowish
hairs. Hind tibise of ordinary strength, not infuscated at the
tii>, with a long glaln'ous streak upon the hind side. Fore tarsi
abundantly one and a half the length of the tibioc ; the first four
joints yellow, on the inside with a somewhat whitish reflection ;
stalk-shaped from the firht to the third joint ; the fourth joint late-
rally comi)ressed, somewhat broader than the preceding, especially
towards the tip ; the first joint nearly as long as the three follow-
ing together; the fifth joint black, compressed, broad, especially
towards the tip, beset on the upper side with closely appressed
little hairs. ^Middle ta...-i ulackened from the tip of the first joint.
Hind tarsi altogether black. Cilia of the teguhe whitish. "Wings
hyaline, somewhat grayish, of rather uniform breadth ; the costa
at the i\\) of the first longitiulinal vein with a weak and very
short swelling; the fourth longitudinal vein not broken.

Hab. "Wl.lte ^Mountains, New Hampshire, July, 18G3. (Osten-
Sacken.)

Observation. — This species has an extraordinary resemblance
with D. sploididtis on one side, and with D. sitbciliatus on the
other. It diflers from D. sj^Ioididiis, with which it agrees more
with regard to the structure of the fore tarsi, by the less densely
ciliated hind femora, and by the smaller extent of the incrassa-
tion of the costa. I), sitbriliatiis has longer and more slender
fore tarsi, the fourth joint of which is as slender as the preceding ;
it has the hind ti))iic infuscated at the tip ; the cilia of its hind
femora are not oidy more scarce but also shorter, finally the swell-
ing of the costa is more extended. ^loreover, not only D. splendi-
dus, but also J), subciliatus are considerably larger than D. splcn-
dididus. This character will enable us to distinguish the female
of D. ftpleiididulus from that of D. splcndidus, as well as from
the female of D. suJiciliotus ; the two latter, however, cannot be
confounded on account of the diiferent color of the hind tibitc.

V

45. D. palacstricus Lokw. % and 9, — iEneo-viridis,pedihus flavis,
coxis anticis tibiiscjue postieis totis concoloribus, antennis tarsisque
posticis nigris, cilii.s oculorum inferiorilms tegularumque ciliis flavi-
cantibus, vonA alarum longitudinali quarts, iion fractil.

^ . Ultimo tarsorum anticorum articulo admodum dllatato, nigro, in latere

SUPPLEMKN'T.

r>29

externo aUio-micante ; femorum posticorum cilils llavicantibus, iion
conffi'tis.
9 . I'tHlilius simplicibus.

Metallic green; feet yellow; foro coxjp ami the ■whole hind tihi.T of the
same color; antenna) and hind tarsi black ; cilia of the interior orbit and
of the tegulje yellowish ; the fourth longitudinal vein not l)roken.

"J,. The last joint of the fore tarsi very much enliuged, black, on the out-
side with a white rellectiou ; the yellowish cilia of the hind femora
sparse.

9 . Fe(>t plain.

Long. corp. 0.24. Long. al. 0.23.

Syn. Dolichojius palwstrlcHS Lof.w, Berl. Entora. Zeitschr. VIII, 02, 84.

Metallic preen, bright. Face of the male narrow, more pale
ochre-yellowisli than fjcolden-ycllow ; the faee of the fcnnile hroader
and paler. Antennie entirely bhiek ; the third joint of the nip'e
ovate, that of the female shorter. Front green, bright. Cilia of
the inferior orbit yellowish. Fore co.xa) yellow, on the front
side with a .short blaek pubescence. The four posterior eoxte
yellow only at the extreme tip. Hind femora with a bristle before
the tip. Fore tarsi of the female and middle tarsi in bntli sexes
blaekeni'd from the tip of the first joint. Hind tarsi black, ex-
cepting ot.' ' the extreme basis, which is yellowish-brown. Cilia
of the teguhe yellowish. Wings grayish hyaline ; fourth longi-
tudinal vein not broken.

3rale. Lamella; of the hypopygiuni whitish, of moderato size
and oval form ; on the upper and apical margin they have; a nar-
row black border, the latter is jagged and beset with black
bristl .'S. Ilind femora sparsely ciliated with yellow hairs. Fore
iarsl )nce and a half so long as the tibia> ; the first four juints
yello-'V', with a white reflection on their sides, slender, stalk-like;
the first joint as long as (he three following together, Ihe second
abundantly one and a half so long as the third ; the third some-
what broader than the preceding, os])ecially toward its tip ; the
fourth considerably shorter and broach-r tiian the third ; the fifth
joint laterally compressed, very much eidarged, black, with a silky
reflection ; on the outside this refle<'tion sometimes appears almost
silvery. Hind tibiic somewhat thickened ; the two thirds of their
hind side without any iiubescence. The costa at the tip of the
first longitudinal vein with a rather ehmgated swelling.

Hah. New Hampshire. (Osten-Sacken.)

;;:-:i : bit

« ■ (

1 . "i

i

f. -n

Ik k I.

Wb' ^

1 flU

Hii'

^^H> :

^1^9

HB^ ''

m

^^B* '

330

DIPTEBA OP NORTH AMERICA.

[part ir.

Ohxcrrnliftn 1. — J>. pal nslricu s 'lAVL'ry much ]'\h^ T>. hnlilli/fr.
It ilill'tTS from it in holli i-cxcs by the sniiicwlmt lurjiiT iiiitciiiia',
and |»riii<'ii»ally by the liiml tarsi, wliicli arc liliM-k as far iis tlie
extrcmo l»asis; inorcnvcr the iniilc has distiiictly sliortcr lure tarsi
and tlicir (irst three jctiiits are somewhat stouter ; tiie eilia of tho
hind femora ar(( more scarce ; the liind til)iie are less thickened,
and tiie }i-laltrous spot on their hind side is loiifi-cr. Tlio femah;
may he distinjfuislied from the soniewiiat uncertain female of J).
splcndiihiti, and from tlie as yet nnknown female of 7). xplciuliiln-
lus l»y the ))ul)escence on the sides of the abdomen, winch is, to
a greater extent, of a i)ale color; from tlie female of I>. nu(liii< it
dillers \)y the under side of the lirst joint of the antenmu not
bein^f red.

Ohscn'dtion 2. — The discovery of the present species makes it
necessary to mention, in the diaj^nosis of J). bulUlifcr, the pale
color of the first joint of the Innd tarsi, and the very dense Iringe
of cilia on the hind femora of the male.

46. D. melanoceriis Loew. % .and 5. — iEneo-viridis, .antennis
iiigris, int'erioribus ouuloruin ciliis Havicantibus, ciliis tt'gularuin iiigris,
coxi.s aiuicid pedibusqiie thivis, tarsis anterioribus inde ab articuli priuii
apice, til)iaruiQ posticarum apioe tarsisciue posticis totis nigris.

% . Fai-ie subaurei, tarsis simplicibus, femoribus posticis tlavo-oiliatis.

$ . Facie albieante, femoribus posticis non ciliatis.

Metallic green ; antennoe black ; cilia of the inferior orbit yellowish ; cilia
of the tegula? black ;. fore coxte and feet yellow ; the four anterior tarsi,
from the tip of the first joint, the tip of the hind femora and the whole
hind tarsi black.

% . Face almost golden-yellow ; hind femora with yellowish cilia.

9 . Face whitish ; hind femora not ciliated.

Long. corp. 0.20. Long. al. 0.20.

Syx. Ihlichopus melunocerus LoEW, Berl. Ent. Zeitsch. VIII, 93, 86.

Male. Metallic green, bright. Front l)right green. Antennaj
entirely black, rather large ; the tliird joint elongated-ovate,
rather of equal breadth. Face rather narrow, golden-yellowish,
but not shining. Cilia of the inferior orbit yellowish. Lamelhc
of the hypopygium of medium size, ovate, whitish, with a narrow
black border, jagged on the ai)ical margin and bi'set with black
bristles. Fore eoxie yellow, somewhat blackened at the extreme
basis, and clothed on the front side with a black i)ubescence.
Feet yellow ; hind femora before the tip with a bristle, ciliated on

BVI'VLEMENT.

331

llie uiulor side with scattered ycllowi.sli liairs. lliiul tibiie at tlie
til», to a eonsidenihlc extent, blnek ; on the liind side with a jrhi-
hioiis strealv, wiiieh reaches from tlie basis iij) to tlie tip. Fore
and niiihlle tarsi blaclvened from the tip of tlie lirst joint; hind
tarsi altoirether Ijlaelc. Cilia of the tefZ'nliu black. AVinjrs with a
rather dark-gray tinge, and with black veins ; the costa has, at the
tip of the first longitudinal vein, a very short knot-like swelling;
the fourth longitudinal vein i.s not broken.

Feinalc. Tlie plastic characters, which distinguish the male
are wanting hero, otherwise it resenililes the male very much.
The antennie are considerably shorter and their last joint is much
smaller. The face is very much broader, grayisli-white, with but
little admixture of yellowish.

JIab. Canada. (Couper.)

Obtiermlion. — The male cannot bo mistaken for any other
species. The female differs from that of />. comattin l)y its more
consi<leral)le siz(^, darker wings, and the absence of a dark tip ou
the hind femora. It cannot be mistaken for the as yet unknown
female of I). cJu'i/sotilomas, on account of the extended black
color of the tip of its hind tiliitc. All the other species, with the
females of which it could be confounded, have the anteii iie not
entirely black.

*i;

if

w

1 {kH-

4^. D. qiiadrilamellatllS Lofv,. % and 9.— Viridis, nitcMis, aii-
tennis nigris, margiiie infero articuli primi rufescente, facie albil, iiiferi-
oribus oculornm ciliis albidis, ciliis tegulariim nigris, coxis aiiticis
pedibusque flavis, tarsia posterioribus inde ab articuli primi apico nigris,
alarum vena longitudinali quarta non fractA.

% . Duobus ultimis tarsorura anticorum articulia depressis, atris ; lam«llia
hypopygii ochraceis, bilobis.

9 . Tarsis anticis inde ab articuli primi apice nigris.

Gree , shin'ng; antennje black ; the inferior margin of the first joint ved.
dish; face Thite ■ the cilia of the inferior orbit whitish; cilin of the
tegul^ bla'j': ; fore coxte and feet yellow, the four posterior tarsi from
the tip of the first joint black ; the fourth longitudinal vein not broken.

% . The two last joints of the fore tarsi flattened, black ; lamelloe of the
hypopygium ochre-yellow, bilol)ed.

9 . Fore tarsi from the tip of the first joint black.

Long. Corp. 0.27. Long. al. 0.2i).

Syn. DoUchopus quadrilameUatus Loew, Berl. Ent. Zeitschr. VIII, D2, 83.

Male. ^Metallic green, shining. Front shining green. An-
tennui only of middle size, black, the inferior edge of the first

m

i-

■i-'i

i k

i;

I:

r.

Dll'TKllA OF NORTH AMKllICA.

r

I'AIJT TT.

joint I'ctl, which, hctwt'vcr, in s<»nio sj)('('im('iis, cnn 1h; iiincivctl
(inly ill !i ciirrriil cxiiniiniitinn. 'I'hc faci! riilhiT lij'nnd lor u niiilc,
wliilisli, on its uppt'nnost, i»iirt. more yt'Ilowisii-wliitc Ciliii of
tlic inlVrior orUit whitish. Tlie liiniflhi) of the hypopyjriiini arc
(hiric ochrc-yt'llow and with two llul)s, so that, at, a siipcflicial
frlancc, the hypopyjriuni appears to liavc fonr lanicllii' ; tiic lonucr
Hal) has n narrow hlack-hrown liordcr, is not Jau'jtd at all, and
beset with sonu' delicate ]»ale liairs. Fore coxiu yellow, a little
l)laeluMie(l at, llie extreme basis only, on tint front siile with a line
and scattered blackish i)nl)escence. Tin' liiinl coxie yellow at tho
extreme tip only. Feet yellow ; the hind femora with a ])ristlc
before the tip. Fore tarsi not cpiite 1/r as lon^ as the til)iie;
their first three joints yellow, stalk-like, slender, vapidly decreas-
ing ill h'n,u;th ; the first joint altoiit as lonu^ as the three follow-
ing toget'ier; the two hist joints flattened, black and covered
witli black hair, so as to appear rather broad. The hind side of
the hind tibia; only with a very narrow glabrous streak in tho
shape of a line. Middle and hind tarsi from the tip of the first
joint black. Cilia of the teguhe black. ANMngs grayisli-liyaline;
the costa without visible swelling at tlio tip of the first longitudinal
vein; the fourth longitudinal vein not broken.

Female. Very much rescnil>ling the male. Antcnnro some-
what shorter. Face broader, whitish, not yellowish-white on its
upper i)art. Fore tarsi from the tip of the first joint, blackened.
JIah. Palissades, New Jersey ; in June. (Osten-Saeken.)
Ohxcrvatiou. — The female will probably have to be distinguished
from the still unknown female of 7). itcopariuii by its larger size
and the smaller extent of tho black at the basis of the fore coxa'.

I-

Gen. III. GYMXOPTERjVITS.

Corrected Table for the determination of tho Species.

Coloring non-metallic. 1 flavus r.w.

Coloring metallic. 2

n ( Third joint of the antennte with an elongated point. 2 subulatus Lw.
X Third joint of the antennse witliout elongated point. 3

4
7

'{

„ ( Prevailing color of the feet black.
( Prevailing color of the feet yellow

iling color of the feet yellow.

Third joint of the antennre with a very distinct pubescence.
4 J 3 scotias Lw.

(■ Third joint of the autenniB with a scarcely visible pubescence. 5

gUI'l'LEMENT.

{niij^ht mnlallio green.
Hliuik-grt'eii.

( WiiiL'H tinu'cil with gray.
{ WiiiK Mackish.

333
24 pusiUuB II. Hi>.

barbatul
r< tristi

ns f.w.

f, i Tip of tlif hind femora blackish.
( Tip of the liiiiil fi'tuura not blackinh.

'I

„ f Tiiorax dark violet.
I. Thorax not violet.

0

( Fore coxa) as far as the tip, Mackish.
( Fore coxto yellowish.

I Aiiti'iina> entirely Mack,

( AntonniB entirely or partly red.

(J exilis A"'.
8

0
10

7 spectabills f.i(\
^ albiceps /.w.

11
21

1 { ''

„ ( Lamella) of the hj
" I Lauielliu of the h^

Fore coxfo at least at tlio basis distinctly blackened,
ore coxa) entirely yellow.

12
IS

Lamella) of the hypojiygium black. Sfi chalcochrus, nov. sp.

iypQI>ygiiim yellowish. 13

Last joint of the fore taisi of the male somewhat eiilarired.
3 I 1* Bubdilatatus f^w.

Last joint of the fore tarsi of the male not enlarged at all. 14

21! coxalis f.w.
-7 meniscus Aw.

11 frequens Aw.

l(j

28 humilis, nov. sp.

17

1- lunifer Aw.

18

, ^ Fore coxa? as far as the tip, blackened.

I Fore coxa) blackened only at the basis.
f. ( Lauu'll.i' of the hypopyginm black.

( Lamella) of the hypopyginm not Ulack.

„ ( Hind tarsi entirely black.
I Ilind tarsi not entirely black.

Lainelho of the hypopyginm dark-yellow.

{Lainelho of
Lamella) of

the hypojiygium whitish-yellow.

Internal appendages of the hypopyginm penicillate. i:! iitnbriatus Aw.

Internal appendages of the hypopyginm not penicillate.

19

29 ezigiiuB, nov. sp.
20

20

q ( Face yellow.
( Face whitish.

Third and fourth longitudinal veins strongly convergent towards their
end. 14 despicatus Aw.

Third and fourth longitudinal veins altogether parallel.

ITj difficilis Aw.
f Hind tarsi from the tip of the first joint black. Id laevigatus Aw.

21 < Hind tarsi towards the tip a little darker, at the utmost brown, never
i black. 22

/• Middle and hind eoxfe, from the basis, distinctly blackened. 23

22 ■>. Middle and hind coxce yellow, the former at the utmost somewhat
V grayish. 25

4"

tk

yv;'

m

f; >

¥

I -1.

^^L

( V

«.

■i

li

! ;• ;

Mi* ''

24

Th<; lower lart of tho fauo not hairy.
( AnttMiiiit' small.

334 DIl'TKUA OF NdllTII AMKIIICA. [PAIIT II.

Tim lower part of the fuce, in tho fcniali', (listiiu.tly clothed with hair.
2:1 1 1*< nigribarbus /.w.

24

17 parvloornis /.w.

{ Antcunm rather lurg<'. l** opacuB /.«'.

Of ( Venter iiml posterior Tnari,'in of tho phmrro not yellow, iJii

( V'miter and jiosterior margin of tho pleurie yellow. 27

10 politUB r.ir.

21) debilis /."■.
21 craasicauda Lir.

22 minutiia /.t,
23 ventralia i.ir.

2i

( Thorax Hhinim,', front white.
(Thorax rnthor dull, front gray.

„» f Ilypoiiyiiium very stout and lari^o.

( Hyiiopy^ium of ordinary thicknuss and size.

28

f Anteniiiu very small.
I. Antenna) of middle size.

19, «. politus LoKW. % and 9.

I Imvc DOW ol)t!iin('(l also llic iiialo of tin's spocicf*. Tlio rros-
(■{MU-sliii|)t'(l liUMcllir oftlK! liypopyiriiiin arc wliitc-yellowish, tlioir
interior ai)peii(laj!'»'s not iiciiicillate. Th<( dorsum of the thorax
is not ([uitc so l)ri,irlit as lliat of the fonuilc, which otherwise it
rcscinbh'.s very much.

21. •». iiilHillns, nov. sp. 9 .— L.tte viridis, nitens, faoie alh4, coxis
prreter apicem femorihusiiue nigris.

Bright green ; face white ; coxie, with the exception of tho tip and the

femora, ' aek.
Long. corp. 0.10. Long. al. 0.11.

Bright mctallic-g'rcon, by no moans lilnok-prrccMi, Khiiiiiif^. Front
with a not very conspicuons jrray-wliitish dust. Aiitcniim black ;
tho third joint not very small, with an almost imp(>rccptiblc pu-
bescence. Coxa) black, their .second joint yellowish. Femora
black, the tip of the four anterior ones to a considerable extent
yello\,'ish. Tibiie yellow. Tarsi at the basis yellow, from the
tip of the first joint blackened. (The hind tarsi arc wanting.)
AVinjrs with a l)rownish-irray tinge.

Hab. Illinois. (TiC IJaron.)

Ohxervcttion. — A single fennile of this species is in my posses-
.sion for some time; but the rather imperfect condition of this
specimen, and the hope of obtaining better ones, induced me to
delay the publication of this species. As m\' hope has not been
fulfilled, I furnish its description now. It is easily distinguished

Kir'IM,KMF.NT. .!.>.)

from (ill tllior ppccics with liliick feet, l»y its stiinllcr size, iiml liy
its cdlor, wliicli is not Idiifk-ijn'cii, hut pure f^rccii.

aft. a, clialCOflirils, uov. sp. % mill 9. — Jliifo-viridis, nitciin,
aiitciiiiis nii;i'i^, {ludibutt llaviM, cuxiH oniniliuri, |)m>ter uplcum, liiinflli!«4iiu
liyiKipyuii iii^'rirt.

Metallic Rit'nn, .sliininc ; nntcntin' Mnck ; fi'ot yellow, nil tli« coxni with the
eXL'fptioii of tlu) tip 1111(1 thu IniiifUie of tlit) liypux>ygiiiiu black.

Long. coip. (.1.15— O.ltJ. I.diig. 111. (i.l.'j— (t.lli.

Mctiiilie green, sliininjr. Antennie entirely blnek ; llie third
joint short, with 11 not ensily pcrecptihle pulx'scenec. Fntnt
covered witii white dust. Fiiee (»f'the % oehre-yehow, sometimes
rather hrownish-ydlow, that uf the 9 firayish-white ; eiliii of the
inlerior orhit hlaek. Ujtper side of the thorax covered wilii jrniy
or i)ro\vn-<rruy dust, whieh is distinctly visible, when the upper
Hide of th(! thorax is looked at in an ohlicpie direction. Kore
coxiu Itlackeiied ns far as the middle or nearly as far as the tip;
the four hind coxie yellow only at the tip. Feet yellow ; tarsi
from the tij) of the first joint stronjxiy colored with l»ro\vn or
l)la(;kened, the crcscent-shnped lamelliu of the liypopyfrium hlaek.
"\Viii>i's tinj^ed with Ijlackish-^^ray and with hrownish-hlack veins.

Hub. District of Columbia ; New York. (Osten-Sacken.)

Ohticrralioii. — The female has, in the plastic characters, much
in common with tht; fenude of (l. t<]ircf(iliilit<, of which I have now
three specimens ; but the latter is somewhat larger, and the third
and fourth longitudinal veins of the wings seem to be somewhat
closer to each other ; I cannot, therefore, believe that G. xjuclabi-
//.s is oidy a variety in color of G. cJialcochrns, and ho])e that my
view will bo sustained through the discovery of the still unknown
iimlo of G. upectabHia.

!26. G. COXaliH LoF.w. %. — iEneo-viridis, nitens, nntennis nisrris,
coxis omnibus pnt'ter .npiceni iiittris, pcdibiis laniellisiiut; liyjiopygii
flavis, articiilo ultimo tarsorum aiiticonini maris non dilatato.

Metallic green, shinini; ; antennip black; all coxiP, with the exception of
the tip, black ; the feet and the lamelh-e of the hypopygium yellow ; the
last joint of the fore tarsi of the male not enlarged.

Long. Corp. 0.14. Long. al. ('.H — (>.1"».

SvN. (I'ymnopteriius caxulis Loew, Berl. Knt. Zeitschr. VIII, !U, 87.

^letallic green, shining. Front with whitish dust. The an-
tenna) altogether black ; their third joint ovate ; the face some-

' t ■ .. ■.'

'' ' !

. ■ ■ f

)

, , Pi.-:--- .

3.S()

nil'TKKA (IF NOirni AMKllICA.

[I'AKT II.

wluit brondcr tliiin in the in.alcs of iiii»st of llio otlu'i' species, and
white. All tlic e(j.\;u hhiek, only fiie '.vtreiiio tip yellow. Feet
yellow; the four anterior tarsi, fmni the tip of tl • first joint,
blackened; tlie hindmost ))lack, with the exception of the liasid
iialf of the lii'st joint ; the last joint of the fore tarsi not enlarged.
Jlub New York. (Osteii-Sacken.)

Ob/^rr ration, — T dare not i)ositiveIy decide Avliether a male,
vhich Mr. Le JJaron eaiiu'ht in Illinois, l»eloii<;s to this species or
not. It dillers from the aljove desci'ilied typical males in a re-
markahh; deji'ree, as it has the first two-thirds of the fore femora
and the upper side of the hind femora infnscate<l, and the hind
tar>i, with the exception of tin; extreme l)asis of the first joint,
of a black color; moreover, the third joint of the antenna! is a
little shorter. 1 would not venture to estai)lisli a separate species
upon this single speoimeu.

Uf. <». lllclliMCUH LoF.w. % and J. — .Thu'o-viridis, niteiis, nnteiiiiis
niirris, coxis anticis pra'tcr basim, pe(lil)iis lajiicllirtiiue hypopygii llavia.

Metallic grt'l'ii, sliiiiini: ; antciiniP l)lat;k ; t'oro (.'OXH!, with the I'xcejttion of

the l)a.si.«, feet, and lamella' of the hypopygiuiii, yellow.
Lonir. eorp. Clf). Long. al. 0.1.').
Sy.v. (!i/miiojiterniis mcniscini LoEW, Borl. Ent. Zeitschr. VIII, 04, 88.

Kesenibles tlie (r. ro.nilix very much, but is somewhat larger
and more of a bron/.e color. Fore coxse black always (jnly at tln^
l)asis ; the third joint of the anteuiue a little shorter and Itroader,
all the rest like the preceding.

Hub. Distriet of Colnnil)ia. (Osten-Sacken.)

^S. <ir. llliniills, nov. sp. % and 9 .— iEneo-viridia, nitens, anfonnis
iiigris, faciii albil, coxis antieis toils, pedil)us laniellis(iiie hyi)oi)ygii tlavis,
tihianini postijaruni apice infuseato, tarsia posticis totis nit^iis.

i\Ietallio green, shining ; tlio anteniue black ; face white ; the whole fore
coxiP, the feet, and the laniell.'e of tlie hypopygiuni yellow ; the tip of
the hind tibine infuscated ; hind tarsi entirely black.

Long. corp. 0.12. Long. al. 0.12.

;^^etallie green, shining. Front covered with white dust. The
antenuic altogether black. The narrow face of the nndt? white,
the very broad face of the female whitish. The crescent-shaited
lamelhe of the hypopygium yellow, sometimes almost dark-yellow.
Fore coxtc altogether yellow; middle eoxu3 on the whole outside,

Sri'l'I,K>IK.\T.

3»"

liiinl ('o.\:i> at least on a jtarl of it, lilackisli. Ft'ct yellow; tlic
liiiid til)i;i> of the feiiiiiie are iii<listiiK'tIy infiiscatcd at the tip ; tiiosc
of tJK' male aro disiiiictly infiiscatcd or oven ))lackcii(Ml, csitccially
upon their inner side. 'I'lie hind tarsi are entirely hlack. Win<;:.s
tiiijred Avitli hlaekisli-u'ray.

Ihib. 'Si'W \o\-k (Osten-Saeken) ; Illinois (Le ]>aron).

2!>. Cii. (>xi;;iills, nov. sp. %. — ^Eneus, iiitc^ns, aiitennis iiii.'ris, facio
ochrat'cd, coxis aiitiuis totis, pedilms laiiiBllisiiuo liypopycii llavi.->.

]ii()ii/t'-((il(ii'('il. sliiiiiiiu' • ;!ril('iiii!o blauk ; facu (Hjlirc-yelliiw ; tlio wlml'?

f{ii(? cox.'i', tlio ft'ot, and tlu( laiut'llju of tlie liyiioiiygiuni yellow.
Long. coip. (1.1:2. Long. al. (KVl,

More l)r<inze-('olored than metallic jrreen, sliiniiiir. 1 •ont
covered with a oray-wliitish dust. Anteiiiiie ail<ij;'ether l)hiek,
the narrow face brownish ochre-yellow. TIk; creseent-shapcil
laniclhi' of the livixipviiiiiiii velluwish. Fore coxse eiitirelv vcl-
low ; also the four jiosterior coxse mostly yellow, hut tiic whole
outside (jf the niiddh' <M(.\a! and a consideraltle portion of the out-
side of the hind coxa' Ithu'kish. Feet yellow; the tarsi, with the
exception of the basis, strong'ly infuscated. Wings fi'ray.

I lab. JlliiKds. (TiC aroii.)

m

^{

-;

«{
J

Oen. V. PKLASTOXEIRIS.

Corrected Tchlc /'or dcti nitiiiiin/ the. Sjieries,

Cilia of tlir> intVMior orMt lilndc. 2

Cilia of till' inft'iior orbit ■wliitisli. (J

A bright white, glittering .spot on the posterior margin of tin' (borax.

1 longicauda /.oiiu.
No such whito spot on the posterior margin of the tlioiax. ;{

Wing.s blackened. 2 lugubris /.our.

Wings tinged with blaekish-gray. 4

Fore cox* altogetln'r yellow ; lamella; of the hypopygiiup. loTig.

.'! leetna f.orn\
Fore coxae not aUo^iether yellow? ; lamella! of the hypopyu'iinn .sjioit. ■'>

Only the basis of tlie fore coxa' blaekeiied. i) lamellatus /-mir.

The whole (l'»r« co.x.e blackeni'd. 7 abbreviatiis /.ocio.

Fore coxa- bb'ickened at the basis. 4 vagans I.oi'w.

Fore coxai entirely yellow. 7

Dorsum of the thorax of a uniform color. ,'j cognatus /.oew.

Dorsum of the thorax copper-colored, with blue-green strijies.

a alternans Locw.
22

m

1,1

'.4

f

i ;,:!■

■I'}

wt

338

inPTEllA OF NOUTU AMERICA.

[PAUT ir.

6. P. laniellatlis Lokw. %. — Ohs'^'. re viridi-a-ons, postica thoracis
parte et scntello violaceis, seta aiiteiinarum pilis loiigioriliua pluiiiata,
ciliis oculorum iiiferioribus iiigri.s, pedilius flavis, coxis anticis coiicolori-
bus, basini versus uigris, lamellis hypopygii brevibus, nigris.

Dark 1)roiize-green, the hind part of tlie thorax and the scutellum vioh4 ;

arista feathered with ratlier lung liairs ; cilia of the inferior orbit black ;

feet and fore coxai yellow, the latter black at the basis ; the short laiuellse

of the hyiiojyygium black.
Long. corp. U.12. Long. al. 0.12.
Syx. PelastoneuruK lamellntus Lokw, Berl. Entom. Zeitsch. VIIT, Df), 00.

Dark grcon, Ijronzc-colort'd, tlio larj^or portion of the poi^terior
])artof'tlio dorsinii oftlic tliorax and the scutoUiim videt. Front
dark violet, sliiiiiiijr. Aiitcniue dusky rod, niu.st of the third Joint
))]aclv-l)ro\vii. Tlic feathery pul)escence of the arista rather loiii^.
Face witli a wlutc rclleetioii. Cilia of the inferior orbit blaek.
Tlie iiupresriioii on the lateral end of tlie transverse suture of the
thorax with a brifrlit white refleetion. The lanu-lke of the liyj^o-
pyu'iuni ishort, rather ere>;eent-shaj)ed, blaek and covered with
blaek hair. Fore eoxte yellow, blaekened from the I)asis up t,o
the middle. Feet yellow; the extreme tip of the hind femora
black, ^riddle tibiio at the extreme tip, hind libia' at the <'xtrriue
))asi,s and tip, brown or black-brown ; fore tarsi, towards the end,
stronjrly infusciited ; the four posterior tarsi, wiiii the exception
of the basis, brownish-l)lack. Tegula) whitish, with black cilia.
WinfT.s tinged with blackish-grny ; the s})ace between the third
and fourth longitudinal veins comparatively broad.

Bab. New York. (Osten-Saeken.)

■y. P. al»l>l'evia<us Lokw. % and J. — Obscure viridi-reneus, PetA
antennarum breviter plumata, ciliis oculorum inferioribus nigris. pedibns
ex testaceo Havis, fenioribus aiiterioribns basini versus interduin infus-
c.atis, coxis omnibus nigris, lamellis hypopygii brevibus, nigris.

Dark-green, bronze-colored : arista feathered with short hairs ; cilia of the
inferior orbit black ; feet brownish-yellow ; the anterior femora towards
the basis sometimes infuscated ; all the coxjb blackish ; the short lamellte
of the hypoiiypiuni black.

Long. corp. 0.13. Long. al. 0.13.

Syn. Pi- I ant one urns (lUircviatiin Lokw, Berl. Entom. Zeitschr. VIII, 94, 89.

Dark gretMi, lironze-colorcd. Front dark steel-blue. Anlennie
rather dull red ; third joint mostly black-brown. Arista of the
antenn:« feathered with very short hairs. The face of tli'' 'uale

BUPl'LKMKNT. .jJi)

with a wliito reflection, tliatof tlie female (larl\-jrray, rovore(l witli
wliiti.sli (lust only at tlic toj) and on tlio lateral niarj^in. Cilia of
the iiif'.'rior orl)it hlaek. Upper side of the thorax somewhat
covered with brown dust, more shiiunu^ towards the jiusterior
margin ; tlie impression on the lateral end of IIk; transverse suture
with a white reflection. Scutellnn) steel-blue. Laiuelhe of tlie
hypopygium short, crescent-shaped, lilaek, and covered with black
hair. All the coxic I)laeki.<h. Feet yellow, or brownish-yellow ;
the tip of the hind femora black; tlie fore femora are often infus-
cated to a considerable extent towards the; basis ; the middle
femora also sometimes show, towards the basis, a distinct infusca-
tinii ; the extreme tip of the middle tibiic, as also the basis and
the tip of the hind tiI)iio are usually also somewhat infuscated.
Fore tarsi, towards the tip, strongly infuscated ; middle and hind
tarsi, with tlie exception of tlie liasis, black-brown. '^regulse
yellowish with black cilia. AViiigs tinged with Idackish-gray ;
the <i>ace between the third and fourth longitudinal veins rather
narrow.

Huh. New I*ochelle, X. Y., in June. (Osten-Sacken.)

8. P. alteriiaiiS Lokw. 9- — <^l>scure viridis, vittis thoracis alter-
nantibus seneo-cuprei.s et ex cferuleo viridibus, seta aiitemiarum breviH-
sime sul>pluinata, ciliis oculoruiu iiiferioribus albidis, coxis anticis
peiUbuscjue flavis.

Dark greon ; th« thorax alternately with dark copper-red and blue-green
longitudinal strii)es ; arista feathered with very short hairs; cilia of tfie
interior orbit whitish ; fore cox;e and feet yellow.

Lon cor-p. 0.13. Long. al. 0.13.

Syx. J\l<i.tt<jiieiinis (iltcriKins Loew, Berl. Ent. Zeitschr. VIII, 95, t)l.

Dark bronze-green ; thorax with alternately lilne-green and dark
'^oppei'-colored longitudinal strijies. Front steel-blu<'. Antenna!
V('i\. iiio>t of the third joint black-brown; the arista feathered
with \ I'l'v short hairs. P'ace narrower than in the females of
other species, dark gray. Cilia of the inferior orliit whitish.
Scutelliini blue-green, almost steel-blue. The impression on the
lateral iiwirgin of the thorax has a bright white reflection. The
whttU' fori' coxa' and the feet yellow ; hind feiiioi'a sciircely some-
wliat blackened at the extreme ti}) ; the tarsi from the tip of the
irst. joint bhu-k. Tegiihe white-yellowish, with black cilia.
Wings tinged with lilackish-gray.

JIab. Xew Kochelle, X. Y. (Osten-Sacken.)

M)

I ^ii Ik-

-■• ■ ;, it-'

-i;

I

i!

iM

'fl

ii

•

340

l\

^li

.31!

DIPTERA OF NORTH AMERICA.

Gen. XX. PORPIIYROPS.

[part II.

5. p. longipes Loinv. % . — Viridis, facie alba, coxis ex viridi nigris,
peclibus anterioribus llavis, iiltiiiiis tarsoruni articulis nigrin, piirlibii,^
posticis uigris, feiuorum basi tibiiscjue supra (basi taineu excepta)
testaceis, apice hariim tarsiwiiue fuscis, exterioribus liypopygii appen-
dicibus filiforuiibus, bipartitis.

Green ; face white ; coxne black-green ; the four anterior feet yellow, the
last joints of the tarsi black ; tlie basis of the femora and the upper side
of the tibiie, with the excejjtion of the tip, brownish-yellow, the tip of the
tibite and the tarsi brown ; the exterior ai)pend;iges of the hypopygium
linear, bipartite.

Long. corp. 0.2(J. Long. al. 0.21.

Syn. Porphijrojis lonijipes Loew, Berl. Ent. Zeitschr. VIII, 95, 92.

Dark green, shining ; lliorax with two narrow approximated
darli streaks. Front covered witli white dust. Anteniue bhiok ;
the third joint lanceolate; the arista a little shorter than the
anteiMine. The narrow face Avhite. The lower part of the occiput
clothed with dense yellowish hair. Abdomen above with black,
on the sides with yellowish-white hairs. Tiic exterior appendages
of the hypopygium dusky yellowish, linear, bipartite, and betJct
with delicate whitish hairs. Fore feet 3'ello\v ; the two last joints
of the tarsi black ; the tip of the preceding joint black-brown ;
the fore femora upon the latter part of the upper side, blackened ;
the tip of the first joint of the fore tarsi iiierassateil, almost denti-
form on the under side. Hind femora blav'k with brownish-yellow
basis. Hind tiltia^ and liind tarsi comparatively stout ; the tibiae
black, on the upper side, with the exception of the tip, ))rownish-
yellow or yellow, tiie tip brown ; the tarsi brown, their tips black.
All the feet longer than in most of the other species o{ ForphyrojiK.
All tiie coxa> greenish-lilack with a pale pubescence ; the middle
ones, at their tii)s, with black, approximated bristles, forming a
tuft, not unlike a thorn. Teguhe yellowish, with whitish cilia.
Wings tinjred with browMiish-gray and with Ijlackish-brown veins;
the e?id "f tjic third longitudinal vein gently curved dow'uwards ;
the last segment of the fourth longitudinal vein inflected.

Hab. White Mountains, Xow Hampshire. (Osteu-Sackeu.)

m

EXPLANATION OF THE TLATES.

PLATE III.

1. nygroceleiitliiiH i.atipes Ln: % .

a. head 'Jj , b, head 9, c. antenna ^ , and (/. wing ^ .

2. DOliChopilS FDNDITOR Lw. % .

a. head % , h, head J , c. antenna ^ , and d. wing J .

3. Rliagoiieiirus polychroaius Lu\ % .

a. head % , b. antenna % , and c wing 9 •

4. Gyninopterniis lunii-er Lw. % .

a. head %, and /). head J of (Jiintnnpternns crast^icdnrld Lw. — c. an-
tenna % of 6^. liiiii/er, — (/. antenna % of G. sttlmlatKs Lw. — f.'.
wing 9 of 6'. crassicaitda.

6. Pelastoiieuru!^ vacaxs Zw. -^ .

a. antenna ^ , /*. head % , c. head 9 1 ''■"•1 ''• wing % .

6. Tacliytreclius vouax Lw. % .

a, head % of T. vorax. — /). head 'J, of 7. moechioi Lw. — c. antenna
^ of 7". vorax. — d. antenna % of T. muechus. — e. wing 9 "'
T. vorax.

a, Paracliiis alroxotatus Ln\ % .

a. head 9 > ''• antenna 9 i •in'l f^- wing 9 of P. arcnatus Lw.

8. Ortliocliile soccata Lw. % .

a. and b. head % , c. antenna % , and rf. wing ^ of same.

9. Ilercostomus i-nicolor Lw. % .

a, antenna %, and b. wing of same.

PLATE IV.

10. Sybistroma nodicornis .lA k/. % . —

a. and b. head 9 > <'• head 'J, , d. antenna 9 i ^- antenna % , and
/. wing % of the same.

( 341 )

J-i-

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342

DIPTERA or NORTH AMERICA.

[part II.

11. llypopliyllus nisciPEs yl/ir. %.

a. head 9 1 ^- autenua J , c. autenna % , and d, wing % of the
same.

12. IIaltericerii8 EccKRus Aw. %.

a. head % , b. auteuua f , c. antenna % , and J. wing 'J of the
same.

13. Diostraciis pkasin-us Lw. %.

a. antenna %, h. head %, c. head 9» and d, wing ^ of the same.

14. Anepsiiis flaviventkis Mel<j. ■^ .

«. head % , b. antenna % , and c. wing % of the same.

15. Argyra albicans Liv. % .

a. })ead % , b. head J , c. antenna ^ , d. antenna 9 > and e. wing
^of the same.'

16. Syntornion metathesis Lw. % .

a, head % , b. head 9 > c- antenna % from the outside, d. antenna
9 from the inside, e. antenna % inside, and /. wing -J, of the
same.*

IT. Synartliriis palmaris Lw. % .

u, head 9 i and b. head % of <!>. pallipes Fabr. — c. antenna 'J, , and
d. wing ^ of S. paimaris.

IS. Systenus Scholtzii Lw. %.

a. head 'I, of S. bipartitus Lw. — 6. antenna % of 5. Scholtzii. — d.
wing •£ of S, adpropinquans Lw.

I« i W . :=

w

PLATE V.

19. Rhaphilim lonoicorne Meig. % .

a. head 9 t ''• head % , c. head 9 » «?• antenna "^ , and e. antenna
9 of the same.— y'. antenna 9 of R. lugubre. — g. wing 9 o^
R. longlcoriie.

20. Xipliandriiini qpadripilatum Liv. % .

a, head"^, and b. head 9 of X. caliginosum Meig. — c. antenna %
of X. quadrifilaium. — d. antenna % , e. antenna 9 1 and /, wing
9 of -X^. caliginosam.

21. Porpliyrops melampus Lio. % .

a. head % , b. liead 9 i c. antenna ^ , d. antenna 9 > ^^"^ ^' ^'"S
'^ of the same.

' The antennal arista of the % was made by the engraver a little too
long, that of the 9 ^ little too short.

' Owing to a mistake, which was discovered too late, the posterior trans-
verse vein is wanting in fig. / in some of the impressions of this plate.

EXPLANATION OF THE PLATES.

343

22. Siniliotus maiutim^e Hal. % .

a. iiiiteniia % of S. thinophihia Lw. — h. antenna %, c. bead ^, d.
head 9 , and e. whig % of S, luuritimas.

33. AplirosylUS KAPTOK Wall:. %.

a. antenna % , b. and c. head %, , d. wing ^ of the same.

34. Tliinopliilus flavii-alpis Zeit. % .

(/. antenna % , h. head %, , c. head 9 1 '^^ wing J of the same.

25. Peodcs foecipatus Z,w. '^ .

«. head '^ , 6. head J , c. antenna % , d. wing ^ of the same.

26. IVeniatoproctiis DisTEXDKNs J/?/"<7. %.

a, head 'J, , b. head f , c. antenna % , rf. wing % of the same.

2T. Leucostola cixoulata Aw. ■J, .

a. head ^ , b, antenna % , and c. wing ^ of the same.

PLATE XL

28. EUtarSllS ACLICDS Mfir;. 1 .

a. head ■J, , /). antenna 'J, , and c. wing % of the same.

29. Diapliorus spectabius Lw. % .

a, head "^ , Z». head 9 of D. soilalis Lw. — c. head ^ , and d. an-
tenna % of Z>. spectabilis. — e. wing 9 of A*, interruptus Lw.

30. liyroneunis f^RULEscENs Lw. 9 •

a. head 9 > ''• the same from the side, c. antenna J , d. wing 9
of the same.

31. Chrysotus oDLiQUDs Aw. %.

a. head 9) ^"'^ ''• head % of C oblifjitus. — c. head 'J, of C. vivldiis
Lw. — (I, antenna % of C viridiis. — e. antenna % of C. ohlifpins
Lw. — -f. antenna % of C cornutus Lw. — ^. wing ^ of C. vividus.

32. Teuclioplioriis moxacaxthus Zw. 'J, .

a. liead. '^ , i. antenna % , and c. wing '^ of the same.

33. Campsicneiiius claudicans Liv. % .

a. head % of C. rlaudicdiis. — b. middle foot "^ and antenna % of
C. hirtljie.-! Lw.— (/. antenna % and wing 9 of C. claudicaiis.

34. Synipyciiiis nodatus /.w. -j, .

a. head % , 6. head 9 » c. antenna 9 > '^' antenna t, of S. nodalus.—
e. wing "J, of S. iir>i<iiiHs Lw.

35. L.iancalMs oi-nuams Lw. %.

ti. antenna % , h. head 9 i f- head ^ , and d. wing 9 of the same.

36. Plagionetirus rxiviTTATcs Lw. 9.

a. liead 9 » ''• antenna 9 > and c. wing 9 of the same.

■■J- -il:

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i1.

344

UU'TEIIA OF NORTH AMKUICA.

PLATE VII.

[PAUT II.

37. Scelliis Aviprs Lw. % .

a. huail % , I), antonna % , and c. wing % of the same.

3S. Ilyflroplioriis innotatds /^!<;. %.

((. .luteniia %, b. head 9i ''• wiug % of the same.

39. IVIedeterU!^ ihadema Linn. % .

a. and />. head % , c. antenna % , and (/. wing ^ of the same.

40. Aclialciis FLAVicoLLis Meig. 9 .

o. and i. head J , c. wing J , and rf. wing 9 of the same.

41. Xaiithocliloriis ukiaixos Lw. %.

a. head % , b. antenna % , c. wing % of X. ornatus Hal.

42. Chrysotiiims pusio Lw. % .

a, head 9 > ''• antenna % , c. wing 'J of C. molliculus Fall.

43. Saiicropus dimidiatds Lw. % .

a. antenna 9 from the outside, b. antenna "^ from the inside, c.
head 9 » <'• head % , and e. wing '^ of the same.

44. Psilopiis FiLiPKs Lw. % .

u. head % oi Ps. Jilljies. — I), head % of Ps. scobinator Lw. — c. head
"^ of Ps. palleiis Wied. — <l. antenna % of Ps. scintillans Lw. —
e. antenna % of Ps. jiilosns Lw.— ;/'. antenna % of Ps. comdtus
Lw. — ^. antenna ^ of an undescribed species from Ceylon,
related to Ps. globuli/er Wied. — h. wing '^ of Ps. psittacinus
Lw. — (. wing •£, of Ps. scobinator.

'i.i ....

r\ '::

l!-:

?■! '^■:

*''

REMARKS ON THE GENERIC CHARACTERS,

EXPLANATORY TO TIIK TLATKS.

Altiiocoii the present publication on North American Dnlirhnpodld.r was
based upon a eoiisiilerahlo iiuuiher of sp^'cies, it can bo safely assuiueil
that these species do not represent all the Genera occurring in North
America. I have, tlierefore, ailded the characters of even those genera of
the family, representative species of which have not yet been found on
that continent, and I hope that this a<lditi()n will prove useful to those
desirous of studying this family in detail. In order to facilitate the recog-
nition of generic characters, live plates, drawn for this purpose, have been
added to this volume. But as on these plates every genus is represented
only by a single species, this might easily give risa to the mistake that
specific marks belonging to that particular species are generic characters.
In order to prevent this, I have deemed it advisable to append to the plates
the following explanatory remarks on the generic characters, which should
always be consulted in determining species.

The figures of the antennas show that the first joint iv No, 1 — l(i is dis-
tinctly provided with bristles on the upper side ; in Xo. 17 — 44, on the con-
trary, it is glabrous. This distinguishes the two principal iHcisions of the
Dolichopodidoe.

Among the species belonging to the FIRST PRINCIPAL DIVI-
SION the genera numbered from 1 to 12i have a couiph^tely disengaged,
elongated hypopygium ; those numbered 14—11) a small, rounded, more or
less imbedded one ; in No. 1") the hypopygium is short and sessile, but not
imbedded, so that tills genus (Diostracus) forms a transition from one of
these two siihilivisions to the other, and may be incluiled either in the first
or in the second. I have given preference to the first arrangement, but
have separated this genus from all the others of this subdivision on
account of the very large size of the palpi of the male.

The other genera of the First Sub-division stand much nearer loeach
other in their organization : they may, however, be easily arrangeil into two
groups according to the circumstance whether the first joint of the bind
tarsi is provided with bristles on its upper side (No. 1 — 3), or is without
such bristles (4 — l(i). To the,/n-,s7 of thrse (jronpsXniXowg: Hygroceleutlius
(1), Dolichopus (2), and Rhagoneurus (.3). The difference between

' These numbers I'efer to the plates.

(345)

Wm

■:? 'm

340

Dll'TKU.V til' NollTll AMKIUCA.

[I'AllT If.

IH :■
It ij '

[< «

Hygroceleuthufl ainl Dolichopus consists in tlirt structuru of tho
hc.ul, wliiili is liiglicr iuid nariowt-r in ll^groutiU'iUlius, esiitH;iiilly in tii(t
inaUs, iind in tin- ItMigtli of tliu fitcc, which ruaches fartlier down in Ilyu'io-
cfli'iiiliiis and gives to tho head a diircrfnt inolilo. Thu giMiiis Rhago-
ueiirus liilfiji's from Tacli^'trt-clius and Dolichopns by thu foatlit-red ari>ta
of till' ant(iiin!c and th« dillifi't'iit structuro of tlio niah' ahdoniun, wiiioh is
a little I'oiniu'c.-'stMl laterally, as aljso by the fracturo of tliB last segment of
tlie fourth longitudinal vein peculiar to it, and in whitdi it is not ciiualli'il
Ity any of those species of Dolicliopns wliich liave the last segment of the
fourth longituilinal vein also fractured ; in the structurw of tho head Hha-
goneunis agrees with Dolichojius, in that of the hypopygiuiu with Doli-
cliojius and Tuchytrechus. '

' Mr. Rondani has estahlislied tho genus ithageneura "U those Kuropeaii

species of l»olicho[uis, the fourth longitudinal vein of whicli is broken. This
genus cannot ho retained in this sense for several reasojis. 1. Because
these species do not dill'er at all from tlio otlior si)ecies of the genus in tho
other parts of their organization. 2. Because tho fracture of tho fourth
longitudinal vein of these species is very dillerent in kind as well as in
degree. '••. iecause this fracture in some sjiecies is sometimes present,
sometimes not. I have already stated above, on p. 10, that Dol. ziczao
Wild. ri-i]uii'es the establishment of a new genus. At that time I knew
only this one si)ecies of the newly proposed genus, and considered thereftu-e
its establishment as premature, yinco theu 1 liave become ac(]uainted
with several species, so that 1 feel prejjared now to introiluco this now
genus, and take occasion at the same time to furnish a description of the
typical siiecios which I have figured. I projioso for this new genus the
name of Rhageneura, introduced by Rondani in a somewhat different sense,
modifying it only in tho more correct Rhagnneurus. Tlio characters of
this genus aie : First joint of the antenna? with bristles on tlie upjier side ;
tlio arista of the anteuiiie fealhereil or hairy; lirst joint of the hind tarsi
with a bristle ; fourth longitudinal vein twice broken at right angles, with
a considerable stump of a vein at each angle of the fracture ; abdomen of
tho male a little compressed laterally ; hypopygium entirely disengaged,
as in Dolichopus. Tho figured species is the following: —
Rhagoneurus iioli/rhromns nov, sp. 'J, and 9 • — Viridis, thoraco violacpo-

et ciipreo-variegato, fronto violaceA, antennis rufls, pedibus llavis, alis

cinereis, venis transversis non infuscatis.
%. Facio ochracea, hypopygii margino supero et apice flavis, lamellis

parvis, alliicantibus, teuuissimo uigro-marginatis.
5 . Facie alliida.

Green with violet and coppery spots on tho thorax ; front violet : an-

tenn.ne red ; feet yellow ; wings gray ; the transverse veins without a

dark margin.
^ . Face ochraceous ; upper margin and tip of the hypopygium yellow,

tho small lamellfe whitish, with a very narrow black margin.

iYn

REMAUKS ON THE flENERIC CILVRAPTERS.

S4t

Tlio pocuHnr ornaments, which the figured males of IlygrcKeleuthus and
I»oli(.'li()iius jiosHosH, as well as tlio strong swt^lling of the <'()sta liefore tlie
tip of tilt! fust hnigitu linal vein in llygroceleiitiius are not geiK-r e, but
merely specilic cliann.ters wlii<h, moreover, do not hclong to tlic females.

To the scroii'l i/rou)! belong tlie genera <iymnoi)ternus (4), I'araclius (7),
JVlastonenrus (J), Tachytrechus (U), (Jrthochile (S), Her.'ostomus (1»),
iSyliistroma (H')) Hyi'opliyllus (11), and Ilaltfricenis (111). The gi'nua
Gyninopternus, if uiiderstooii in the limited sense adopted above, dill'ers
from all tliu other genera of this group by the parallelism of the third and

9. Face wliitish.

Long. Corp. 0.17. Long, ah 0.17.

!r*liining metallic green. Front bright, violet-blue, an unia yellowish-
red ; tlio pub(;scence on the upper side of the liist joint 1 alier short ; the
third joint rounded-ovate, howevei but little rounded at the end ; shorter
ill the femalu thiin in the male, in both sexes blackened to a very
small extent on the ujjper margin an<l at tlie extr»'me tip. The arista of
the antennto in both sexes with a considerable feathery jjubescenco. Vnrei
of tlie male not v^']•y narrow, oclire-brownish ; the face of the fi'iuale broad,
whitish. Cilia of the inferior orbit yellowish, L'pper side of the thorax
with copper-colored spots and with violet-blue rtdlections ; the former are
more striking in the male than in the female, while the latter are visible
either on the liind part of the dorsum of the thorax only, or sjiread on
its middle more towards the front. Scutellum violet-blue with bliie-i;n'en
margins. Abdomen metallic green, often coppery upon most of the ujjper
part, black at the incisures, covered on the sides with a rather stiikiiigly
white dust ; the hypopygium rather small, its second segment yellow
aloii:; the margin, which is turned towards the venter, and at the tip : its
external lamella) scarcely of middling size, yellowish-white, with a very
narrow black margin, on the edge of the margin a little jagged and beset
with crooked black bristles. Coxic yellow ; the foremost are beset, besides
the iisual black bristles, with short and fine black hairs ; the outside of the
middle coxk is almost entirely covered by a large gray-black spot. F.'et
yellowish, even plain in the male ; hind femora with a bristle before the
tip; fore tarsi brownish-yellow, about as long as the tibiie ; mi(l<lle and
hind tarsi infuseated from about the tip of the first joint, browiiish-black
towards the end ; the hind tibi.-e of the ni'le without gl.ilnous spot on the
hind side; the first joint of the hind tarsi in both sexes has only one or two
strong bristles on the upper side. Tegulre with black cilia. Wings tinged
with dark gray with brownish-black veins ; the last segment of the fourth
longitudinal vein is interrupted twice at right angles, and has, at each
interruption, a long stump of a vein, as the other species of this genus;
transverse veins without any trace of dark margin ; in the male the costa
has a slight swelling immediately before the end of the first longitudinal
vein.

JIub. Ceylou.

I ■

m^A

i.:;i

848

Dll'TKHA OK NOllTII AMKllirA.

[I'AUT ir.

.;:!•

•■Mj.

I* 1' '
I" f '

|i ■/; ■
I' ■■

foiiilh loiiu'ituiliiKil veins of tlh' wings ; it Htiiiidrt in rather cIoho mintion
to till- t'lMiiis I>iili('lio|>u-(, wliii-li Iii-Iiiiil;s to tlit) liist gi'iiiip, ililVt'is fioiu it,
liowi'ViT, not only liy llic want of Inistli-s on tiiu Ilist joint of tin' l:lnil
tiU'Hi, liut also \iy tin> snialltT si/o of its spcciuH, tliH nliortness of tli« llr.Ht

joint of tlni anti'iin.'i!, ami usually liy tint niont (listiiict pnlM'sciMK ( tint

arista; mornover tlio lanmllii' of tin' liypopyfiiuni aro usually snialliT ami
not jauut'il at tlie eml. Tliu ^'cnus Faraclius is ilistinuuisht'il liy a piTii-
iiatf or snlipt.'itinate arista of tliu nntunimi, by tin* face, narrowml liclow
j'Vcn in tin* fcnn'iln, ami liy tint l^'fuliar course of tint fourth lonnitmlinal
vi'in, the cml of whieh forms a curve with its concavity turned hackwards.
Closely related to I'arailius is Felastoneurus; the distinction between
both cenera is easy, if attention is ]iaid to the essentially dill'erent conrso
of tho fourth longitudinal vein, to the very muidi nn)ro bioad face, which
in also more convex uimn its lower part, and to the not Bessilo but pedun-
culated hypopygiuni of tho species of I'elastoneurns, whidi have tho
feathered arista of the antenn.-e in common with the species of l'ar;iclins.
The genus TachytrechuB is very easily recogniz('d by the great length
of the perpendicular <lianieter of the very hairy eyes, by tlio face, whicix
is narrower towards the middle but bioader towards the bottom, and reaches
entirely as far as the inferior margin of the eyes ; the jialpi are also com-
paratively small in the female, and tlie fourth longitudinal vein has before
the middle of its last segnu-nt a gentle tlexure, from which it converges
towards the third longitudinal vein ; tin.' figures of the antuniuu of tho
male of T. nioechus, which remind of the structure of the antenna' of
Ilaltericerus, are an exception to the rule ; however a similar structure
occurs by way of exception in the genus DoHcliopus. The genus Ortho-
cbile is so much distinguished by the structure of the proboscis and
of the palpi as also by tho distance of the tips of tho third and fourth
longitudinal veins from tho tip of tho wing, that it cannot be mistaken
for any other genus. The genus Hercostomus, to which is to be ailded
a large portion of those species which in my previous works I have com-
prised in the genns Gymnopternus, embraces a variety of organizations and
is evidently capable of a subdivision into several genera ; in its whole
structure it shows the greatest resemblance to Cirymnoi)ternus, but in all
the species the third and fourth longitudinal veins, towards their ends, are
rather strongly converging, while in the species of Oymnopterims they are
either entirely parallel, or show but a very slight trace of convergency ;
the hypopygium has, In its structure, a great similarity with that of Uoli-
chopus, but in some species the internal appendages are elongated, brush-
like and hairy, like those of Ilypophyllus and Ilaltericerus, which, how-
ever, is also the case with some few species of Gymnopternus. The genus
Sybistroma, which hitherto remained confined only to a few species, is
nearest to the genus Hercostomus, differs, however, by the scutellum which
is much clothed with hair, by the peculiar structureof tho face of the female
which is much protruding below, and by the peculiar structure of the
arista of the malef. The species of Hypophyllus are easily distinguished

I 1

4^V;

1 :

♦«*►

UFMAUKH ON TMK OKNKUIC CIIAIIACTKRS.

849

liy tlio sliinilcr HtiiK'ture of tho wliolc Ixuly, by tUi« ImiKth of tlicir hIcikIlt
I'cft, l>y tlii'ir jii'iliinciil.'itdd, iisiiiilly yt^llnw liy|iti|iy,i;iiim, wliiili is |(i(>-
viilcil witli niirrnw, liiu'iir tixlcnial aiii»'iiilagf.s itinl cloii.'.itf.l, iiiuro or
liss iiciiicilhitt'il, liitHi'iiiil nji|>fn(liii,'t's, likmvirto hy tin; iilwiivH vfiy pro-
iiiiiH'iit (l('V(!li>i)iiR'iit of tliu Hint joint of till) nristii of tlii> iintfiii\!i', wliich
is (liircri!iit, liowovtd', in dilleieiit siM.'cifs ; tlm Mcutclluni is glaljiourt
ainl tlio lower jiart of tint Icnialt! faio not j)rotruilin,u'. Tlio Hpfuii's <tf
HaltericeruB are more rolmst than tiio niM'cics of llyiiopliyllns ; tin- face
of tliti main is very narrow, that of the fcniiihi very hroail ; the si'coiid
joint of thu .antiMina- in Imth sexes, especially in the males, is rmli-
mentary, and the arista very elongated in the latter and eiiian-'ed at its
tip into a lamella; tin; hyiMi|iygiuni, attached to a loni,' peduncle, and its
appendav't'S, buar tho greatest resemblanco to thoso of tho sjiecies of
Hy]")lihyllus.

To the above-named genera of the first pronp is npi>emled Dlostraciia
(ll'i), as an unomalnus genns. The very broad face in both sexes, tho
})ali)i, mu(di liirger in tiie male than in tlie female, the very small thinl
Joint of the antenna-, tho incrassattfd fore femora, the rmuided, bnt nut
imbedib'd liypojiyuium, with its \t.Ty small aiipimdaites and tho lonu nar-
row wings, with tho posterior transverse vein very close to the margin —
all these characters render this genus very easy to recognize.

To the Second Sub-dlviaion, which is distinguisheil by the small,
more or less imbedded hypopyginm, belong the following genera : Anepsius
(14), Argyra (ir)),and Syntormon (ItJ). In Anepsius the second Joint of
the antenna) has the usual transverse form, and the arista is inserted very
close to its basis ; tiie third Joint of the antenna' sliows a distinct puljes-
cenco ; the first longitudinal vein is short, the fourth jiarallel with the
third; the abdomen of tho male is laterally compressed. Tho Jelation-
sliip between Anepsius and the genus t5ymi)ycnus, wliich belongs to the
Second principal division, cannot be mistaktMi, though the distinct imlies-
cence of the first joint of the antennic distinguishes it very easily from
the other. The genus Argyra is distinguished by tho transverse form
of tlie second and the rather considorablo size of the third joint of tho
antenna?, its subai)ical arista, the broad wings — particularly towards tho
basis, the length of the first longitudinal vein, its distance from the eosta
and tho inflection of tho fourth longitudinal vein ; to these characters
may be addeil, in most of tlie species, tho delicate, but striking silvery
white tomentum, spread over a large part of the body. Argyra is closely
related to Leucostola, the first Joint of tho antenn.'c of whidi, liowover, is
glabrous on the upper side. The genus Syntormon dilters from all tho
other genera of the whole first jirincipal division by tho form of the secnmd
joint of the antennjp, whicli, on its inner side, overlaps the third joint in
the shape of a thumb ; tin; face of the male is narrow, that of the female
broail and protruding below like a roof; the arista of the antenn;e is com-
pletely or almost completely apical ; the third longitudinal vein is parallel
or almost so.

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DIPTKUA OF NOHTFl AMKIUOA.

[PAllT II.

The SECOND PRINCIPAL DIVISION of the Doliiliopoilid.T U
(lividt'cl, ;ic('()r(liiig to lUe sliajK! of the tliird joint of tliH a'lttMiiui', into liro
sii!'-ilin'yioii^ ; tlio pcnora of ilw JirsI .suli-dicision (No. IT-liii) liavo tliis
joint, citlit'i- in both sexes or at least in tiie male, jwiiited anil provided with
an apical arista ; in the geniM'a of tho seroMl siili-dirisinn (No. -4-44), it is
short in hotli sexes, and if it should be somewhat elongated in tho male,
it is not jioiiited, and the arista is either dorsal, or, at the utmost, sub-
ajiiial.

The genera of the First Sub-division are divided into hm i/rou/is. To
tht' fir^il iiriiii/i b(d(ing those genera, the posterior transverse vein of whiidi is
distant fiom the margin of tin; wing. 'J'hey are the following: ^ynartlirus
(17), Systenus (IS), Khaphium (111), Xiphandrium (2(i), Porphyrops (121),
ami Smiliotus (-:'>). Synarthrus shares with Syntormon not only tho
peculiar structure of the second joint of tho antenna>, but also the remain-
ing characters, with tho single exception of tlie first joint of tho antenna',
which is glabrous. Systenus strikingly dill'ers from all tlie other genera
of the group by the pointed abdomen and the very p( dunculated hypo-
pygium of the male; to its distinguishing characters may also be reckoned
t\n\ distinct jjubescence of the third joint of the antenua>, aud the remark-
ably sharp dividing line between the lower j)art of the face and the; ujiper
one. Rhapliium stauds iu close relation to tho two following genera, is
liowever ilistinguislied from tlmm by tho very elongated antenna", even iu
females, aiul by the still more considerable stoutness of the female pro-
boscis ; 11' t, 'cover from Xiphandrium it is distinguished by a less slender
structure of the body, a much strongt>r pubescence, and a stronger llexuro
of the fourth longitudinal vein. The species of Xiphandrium ha >e, like
tlie species of I'orphyrops, only in the males an ehuigated third joint of the
antenna', in the fenuiles it is short; their dill'erence consists in u greater
slenderness, less pubescence, and less llexure of the fourth longitudinal
vein ; moreoviu- the largest species of Xiidiandrium are scarcely e.jual in
the len.;,th of their body to the smallest s|iecies of l'ori)hyrops. The dis-
tinguishing characters of the genus Porphyrops become manifest from
what has just been stated about the two preceding genera. The geiius
Smiliotus has the antenna) of eipial size and form in both sexes ; tiiey
have on the under side, from the tip almost to the base, a distinct ex-
cision ; the face of the male is broad, and its palpi are as large as those
of the female ; linally, the abdomen shows externally one segnu'Ut h'ss
than the related geiiera ; the feet are comjiaratively short and rather vigor-
ous ; the small hypopygium is deeply imbedded and its appendages ans
often dillicult to perceive.

To the secoiiil (jroii/i, which is characterized by a close proximity of the
transverse vein to the ])osterior margin of the wing, belongs the only genus
Aphrosylus (-!5) ; the third joint of its antenna' is but little elongated,
but pointed ; the ])endant ])al[)i are larger in the male than in the female ;
the proboscis is beut towards the chest, the face is narrower above, and

AiiT ir.

ilid.'c is
into iirt,
ivt! this

'I Willi

•1), it is
inalc,
St. suh-

llEMAUKS ON TIIK (iKNKIlIf" ClIAItACTKliS,

351

and

tlio eyes avo excised near tlie anteiiii.e ; the feet have renLrii hiisti
the first joint of all tlie tarsi is niindi hnitrer tlian tin- second.

Aniont; all j^eiKM'a of the Second Sub-division I'silnpus is distin

giiished hy tlie slender structure of its body, and

■iailv of its feet, its

very hroad and more or less excavati'd front, the sniallness of its aiilcun.e,
and linally hy its foiiitli longitudinal vein, which is jiroviileil with ;' pos-
terior iniiiitdi. 1 have assii,'neil to it a jiosition altoLrether at t he end id"
the seconil sub-(livis'"n, and will revert to it there. 'I"he other treneia of
this sul)-di vision may he distriluited into Urn i/rintjis accord ini; to the stnnt-
ture of the thorax. To the first gronj) helonj^ those u'eiiera, the ii]i]ier side
of the thorax of \vlii(di is convi^x, as far as the sciitellum (No. lid-IlD) ; to
the secoml tiiose, where the njiiiei' side of tluf thorax, het'ore the s<-uii'lluni,
bears an inclineil, nmre or less concave, area (No. 4(i-d;i).

The irenera IxdonLrini; to the flist group, and possessini^ a sixth Ioiil;!-
tudinal vein, form ilw jirxt snh-yruiip ; those whero this vein is wanting,
form the sccimd siih-i/riiii]),

Tho JirsI sidi-iiroHj) contains either such genera as have the transverst*
vein not close to tho posterior margin of tin! wiu;,', or su(di where an
approximation of tiiat kind takes place in ;i striking manner. 'J'he genera,
Avliert- theie is no striking aiiproxiniation of the jiosterior transverst; vein
to tlie margin of the wintr, are: Thinoi)hilus (-4), I'eodes (2;')), Neniato-
]iroctus C-ii), Leucostfda (27), l^utarsus (-^), Diaphorus (2!1), J.yroneuius
(:5n), Chrysotiis (151), Teuchophorns (Ii2), Sympycnns (:!4), Campsicnenius
(315), and I'lagioneurus {'■ii'i). Thinophilus has the small and hut littlo
imbediled hypopygium in common with I'eodes (in all the other genera
that belong here, it is inucli more imbeihhid) ; it dill'ers from I'eodes by the
structure of the face, whicli, in botli sexes, is hroailer below, and has an
angular margin; by the large i)alpi of both sexes, and the very small size
of the interior appendages of the hypopygium ; the first two joints (jf tho
ant'Muue are small, the third somewhat in th(,' shape of a lens, and tho
arista dorsal ; the last segment of tlu; fourth longitudinal vein, towards its
end, is parallel, or almost so, to the thinl longitudinal vtdn ; the fi'ct of tho
male are usually variously adorned. The structure of the body o( Peodea
resembles in general that of Thinopliilus ; the structure (d" the antenn.'u
and of tho winu'S is also nearly the same, only the j)ai'all(dism of the third
and fourth. Ion ifudinal veins is still iimre complete than in most of tho
species of Thin(i[iliilus ; both of the interior a|i|iendages of the hy]ioj»vu;iuiu
form a lartre horny triceps; the tarsi of the male of the only s|iecies
hitheito known an- plain. The species of Nematoproctus, in the
whole structure of the body, are nearest the species of I'orjdiyrops ; they
can be, however, easily distintniished. from them by the roundeil, and in
both sexes small, thinl joint nf the antenme. and by the arista, whic h is

inserted in tin! neiglitiorliood of the basis. Tliev are b

<s close IV re I a

ted

ill the u'enus I,eucoslola, be

the elongation of the first lontdtudinal

vein, the b(o/id shape of the wiuu's, and the subapical position of the aiista
lire wanting in tliein ; tlie tiHine characters and the glabrousness of tho

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DIPTKKA OF NOUTII AMKIUCA.

[I'AI'.T If.

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first joint of tlu'ir aiiteiiiiin distinguish thi>in from tlio species of Artryra.
The gt'iius Leucostola .stands to Argyra in tho same relation as Synar-
thriis does to Syntornion, that is to say, it dilTers from it only by the first
joint of tlie antenna; being without hairs ; the considerable si/e of the
thin! joint of the anttMina', the subajiical jxisition of the arista, the great
lireadtii of the- antenn.'u towards the b.-sis, the consicb-rable length of the
lirst lougituilinal vein and its great distance from tlie eosta, are charac^eis
shared by Argyra; moat of the species of I^cucostola have also, likit the
siiccies of Argyra, a delicate, almost silvei'y whitt; tomentum, wiiicli covers
a considerable portion of tlie body. Eutarsiis is very near to Iiiaphmus ;
the dillerence is, that the former has tiie third joint of the antenna.' some-
what larger and that the transverse vein is a little more removed from the
jiosterior margin of the wing ; moreover the face of the males of luitarsus
in narrower, the bristles of the imbedded hypopygium are less >trikintr,
the lii'st joint of the hind tarsi is shoiter, and the pulvilli of the fore taisi
are, alth(}Ugh also enlarge<l, not so elongated as in l)ia[)h()rus. 'J'lu; genus
Diaphorus is rei)resented in North America by particularly varied foiins ;
its (listiiiction from luitarsus has been explained above; from LyrontMirus
it dill'ers by the altogetlua dilferent neuration of the wings, from Chrysotus
by the greater slenderness of the whole body, and esjiecially of the feet,
aii'l the comparatively hniger and generally also proportionally nairowcr
wings ; moreover the structure of the head is dill'erent, as, whiii; the eyes of
the males of Diapliorus are either contiguous above the antenn;e or at least
are separated hy an e^aially broad front, those of the males of Chrysotus
are sonu'times co.'iif. . jus below, but never above the antenna', and the
front is always consiuorably widened above ; this dillerence in the structure
of the front exists also in tlie females of both genera; finally, the males of
]<iaphoius distinguish themselves by the remarkable ])rolongatioii of the
fore tarsi or of the fore and hind taisi, and by the iiarticularly striking
manner in which the small imbedded hypopygium is provided with
bristles, whi<di characters are not found in the species of Chrysotus; the
neuration varies in the dill'erent species of Diaphorus in couse(|uenco of
several modifications in the i)osition of the posterior transverse vein; in
no species, however, is this vein ajiproxiniated to the posteiior margin of
the wing; the end of the last segment of the fourth longitudinal vein is
sometimes cut oil' from the preceding jiart of it and juished nearer to the
anterior margin of the wing, so that both parts are eitlur comjiletely sepa-
rated from each other or at least connected by an indistinct rudiment of a
vein, as the illustration of the wing of Diaph. inteiruptus shows it. The
genus Lyroneurus has a suiiertlcial reseiiiblance to Diaphorus in the
structure of the body, differs, however, strikingly by the large wings, with
a uioi'e or less apparent greasy lustre, by the cosfa, which is usually
tlii(diened in both sexes, or at least in the male, to a very great extent ; by
the end of the third longitudinal vein being strongly turned backwards,
and by the wide ^.pace between the fourth and the third longitudinal veins ;
the hypopygium is usually less provided with bristles than in the species

REMARKS ON THK GENERIC CHARACTERS.

353

^ ''WW

' ' ]

I ^ ■ ■ 1

f ■ ' I

of Diapliorus ; the males of Lyroiiennis, known to me, show no elongation
of the jmlvilli of the fore tarsi. The genus Cbrysotus contains only
small, mostly briglit-green species, which cannot he mistaken for any other
of the following genera, and which are sufficiently distinguished from I)ia-
phorus hy the already mentioned characters ; the statements made a hove
In regard to the shape of the front, the absence of bristles ujion the hypo-
pygium, and the absence of tlie elongation of the pulvilli on the fore tarsi
of the male, will help to recognize whether a given species, unless its
female alone is known, is to be reckoned to Chrysotua or to iJiaphorus ;
as to the female, the structure of the front, the form of tlie wings, and the
greater or smaller slend(?rness of the feet, liave to guid(! us in its location.
Striking is tlie very different form of the third joint of the antenna? of the
ditTerent .species of Chrysotus in North America. The species of Teucho-
phorus resemble more or less the smallest species of Chrysotus, are how-
ever very easily distinguished in the male sex by the soniewhat laterally
compressed abdomen, by the feet which are beset with single, scattered,
.strong bristles, and by the crooked and variously adorned hind tibifB ;
moreover, in all the known males of Tenchophorus there is a large black
swelling on the costa before the tip of tlr, first longitudinal vein, wliicli is
altogether an exception in the genus Chrysotus. More attention is neces-
sary in order to recognize the females of Teuchophorus ; the best guide
in this case is the steep position of the posterior transverse vein, the anterior
end of which is nearer to the basis of the wing than the posterior «nd, and
the comparatively small antennae, the arista of which is somewhat less
approximated to tlie apex than in most of the species of Chrysotus. The
genus SympycnuB contains only small, mostly but little shining species,
which are characterized by the smailness and the distinct pubescence of
the third joint of the antennae, the insertion of the arista in the vicinity
of its basis, the laterally compressed abdomen of the males, the not
elongated metathorax, and the wings being more or less narrow-d towards
the basis ; they have the greatest analogy to the species of Anepsius, the
first joint of the antennae of which, however, is clothed with hair; fioin
Campsicnemus they are distinguished by the not elongated metathorax,
by the abdomen, which is longer and not flattened from above, and by the
face, which is narrowed towards the bottom ; the end of tlie fourth longi-
tudinal vein converges somewhat, in the Kuropean species, towards the
third longitudinal vein ; in the North American species it is parallel with
it or almost so. (The want of the small transverse vein, and of the sixth
longitudinal vein, which occurs in a number of the impressions of Tab.
VI, are merely mistakes of the engraver, which were discovered too late
for correction.) Campsicnemua is distinguished by its face attenuated
upwards, the distinctly elongated metathorax, and the short and, in both
sexes, much flattened abdomen ; the third joint of the aii-nn.-e is small, or
rather small, and in most of the species somewhat pointed ; the dorsal
arista is inserted in rather close proximity to the basis ; the fourth longi-
tuilinal vein is always parallel to the third, and runs before its middle over
23

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354

DIPTEHA OF NCtUTH AMEIUCA.

[PAUT If.

J'

a distinct convexity of the wing. Tlie nialf.s .-ire usually diatinguislied l,y
strikint; ornaments on tlieir feet, especially on the middle feet. The Hpecifs
of PlagioneuruB are altogether distinct on account of tlie very diat'onal
position of the posterior transverse V(dn ; otherwise their neuration is very
near to that of Pelastoneurus, while the glabrousness of the first joint of
the antennfe renders it utterly impossible to mistake them for any specits
of the latter genus.

To the second sub-group, embracing those genera the transver.se vein of
which is strikingly approximated to the posterior margin of the wing,
belong the following genera: Liancalus (Sf)), Scellus (37), and Hydro-
phorus (^58). Liancalus is easily distinguished from Scellus and IlydK-
phorus by ah the femora being slender and unarmed. In the species of
Scellus the fore-femora are beset on the under side witli rather strong
bristles, catching into a row of similar bristles of the fore tibire, and the
third and fourth longitudinal veins are rather strongly convergent toward
their ends, while the species of Hydrophorus have only on the undir
side of the fore-femora, t(iwards tlie liasis, a few elongated thorn-likn
bristles ; the under side, however, not only of the fore-femora, but also ct
the fore tibi;e, is beset only with short bristles, and the third and fnuitii
longitudinal veins are parallel towards their ends, or almost so.

To the next following genus, Achalcus, I have assigned this position on
account of the general structure of its body, which led me to suppose tlie
existence of a relationship between it and the following genera ; I also
presume, therefore, that the structure of the dorsum of the thorax, which
I have not been able to ascertain positively in any of the few specimens
belonging to ine, wir, when found out, justify the location I have assigned
to the genus. In general the species of Achalcus may be easily dis-
tinguished, as the total absence of the sixth longitudinal vein is a cha-
racter peculiar to tliem ; the species hitherto made known are of a non-
metallic color, and of a very small size.

The genera belonging to the second yronp, the thorax of which lias on
its posterior part a more or less concave, sloping surface, are the following :
Medeterus (3iO, Chrysotimus (41), Xanthochlorus (42), and Saucropns
(43). Medeterus differs essentially fiom the otlier three genera by tl e
apical position of the arista, the very large size of the proboscis, and the
totally disengaged hypopygium. The genera Chrysotimus and Xantho-
chlorus contain only small species, and are easily distinguished 1 y their
coloring, which is either entirely yellow, or in part yellow, in part metallic-
green ; Chrysotimus is easily distinguished from Xanthochlorus, by the
subapical position of the arista and by the mmh smaller and ind)eddeil
hypopygium ; with Xanthocdilorus the position of tlie arista of the anteiniie
is dorsal, and the swollen and rather disengaged hyj)opygium is directed
backward so as to assume the appearance of a prolongation of the abdomen
of the male. The species of Saucroprs a>-e of a more considerable si/e
than the species of Chrysotimus and Aaiitii, l>u/rus, and their feet are
comparatively longer ; the second j>iir. of viie uutK^nr.,o somewhat differs

M

RKMAUKS ON TIIK (ip:Ni:i?lC CIIAKArTEIlS.

355

from the usual tiaiisver.'e foiiii, as, on the inside, it reaclifS a little over
tlie third joint; the ari^ta is dorsal; the sixth longitudinal vein runs as
far as the margin of the \.'ing ; the course of tlie last segment of tlie fourth
longitudinal vein varies in the dilFerent sj)ecies, nevertheless it always
shows a distinct convergeucy towards the third huigitudinal vein; the
first joint of the hind tarsi is always consjdeiahiy shorter than tlio scioml.
The color of all the species is either entirely yellow, or reddisli-yellow, i>r
partly so.

The genus Psilopus (-44), closing the series, has the last segment of
tlie fourth longitudinal vein i)rovideil with a posterior branch; this cha-
racter is not wanting in any of the American, European, or African species
that are known to nie ; in some South Asiatic species, however, it is repre-
sented only by a fold of the wing, which sometimes is very indistinct.
Besides, the species of Psilopus are very easily recognized by the slender-
ness of the wliole body and especially of the feet, by the very broad, more
or less excavated front, by tlie small antenn;e, provided with a long, thin,
dorsal or subapical, rarely almost entirely ajiical arista, and by the entirely
disengaged hypopygiura. In the living state they keep the wings divari-
cated, which gives them an entirely ditfereiit aspect from all other genera.
The males have their feet variously adorned, and in some species they are
distinguished by a structure of the wings peculiar to them.

{ ■ ■ i:

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I N D E X.

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Achalcna, 2'J7
Agoiiosoma, 230
Anepsius, 123
Aplirosylus, 148
Argyra, 123
Argyra albicans Lw., 125

albiveiitris Lw., 128

calceata Lw., 131

calcitraiis Lw., 130

cyliiuirica Lw., 132

diaphana Fbr., 12(j

miuuta Z-!/.'., 12!)

nigripea Lw., 127

Campsicnemus, 193

Campsicnenius claudicans Lw., 194
hirtipes Lw., 1!)3

Chrysotiiuus, 22U

Clirysotimus flelicatus Lw., 222
pusio Aw., 221

Clirysotus, 171

Chrysotus abdominalis .9'///, 172, 291
ailinis Lw., 17S
auratus Lw., 183
coiiciiniarius 6'f(//, 172, 291
cornutus Lw., 174
costal is Lw., 179
discolor Lw., 1S2
inuerus HV^., 172, 308
longimamiri Lw , 17r)
mibiliis S<i;/, 172, 291
obli(|iuis /.«'., 17ii
pallipes A(r., 1S3
jiicticoniis Lw., 184
subeostatus A/c, 181
validus Lw., 17r)
viridifemora Mnci/,, 172,

298
vividus Z/W., 178

Condylostyluri, 230

DasypsilopsuH, 230

liiaphoius, 15t!

Diaphorus iiiterruptns L,w., 1(58
laniellatus Lw., 1(55
leucostouius /,«'., lG(j
iiiuiidus Aw., 1()1
opaous I.w., 1(50
soilalis Aic, lii3
si)ectabilis Lw., lt!2

Diostracus, 120

Diostracus prasinus Lw., 121

Doli.diopus, 18, 323

Dolichopiis abdominalis Sai/, 20, 292
aeuniinatns Lw., 34
adjacens \V/L, 22, 312
adjustus Willi., 1()
allinis U7/,-., 21, 310
albiciliatus Lw., 31
batillil'er Lw., 45
bifractus A(r., 53
bifroiis 117/,-., 20, 301
breviiiianus Lw., 39
brevipeiinis Mi'i'j., 37
clirysostoinus Lw., 07
ciliatiis Wlh., 31, 312
coorci'iis II7/,-., 22, 312
coinatiis Lir., (59
conlinis M7/-., 23, 315
confusiis Ztt., 71
consols ir//,., 21, 302
conteiininus U 7/., 23, 31 5
continueiis ir//t.,21,3n2
coiitigmis U7/..,23, 314
cupit'us Siiji, 515
cupriniis Wiiil., 55, 311
disc.'ssus Wlk., 23, 314
discifer Stmni., 71
distractus IKM., 23, 313
doryceriis Lii\, 32(5
t'udaLtvUis A«-., 4G

■( 357 )

(.v'.l: j

- II-

m \\

INDEX.

iiliir

H;

I'cliioiiitiis Sin/, '2W

liiiiiii.i ir/A., L:-J, ;n3

fiilvi|M's A(('., til
finiditor /.I/"., 0(5
triiitiis A»-., 21>
f;i(i'iil;iii(lirtis Z//., 20
liast.'itiis /,((■., f)!)
lifl.HS ir//-., 21, 302
lit!ti'i()inniius Miini., 20,

2i)!l
incismalis l.w., 74
iii.-pliis 117/.:., 21, 303
imisiis H7/,-., 24, 318
lanu'lliii.-s U7/-.,21, 311
Laticdiiiis Lie, 21)
Idljatiis 1,11'., 72
loiii.'iiiiaiius />!('., 38
liiiiuipciiiiis Aw., .'')7
hitciptMiiiis I in., .')]
luaculiiit's ir//-.,21,303
inclanoctM'U.s l^iv,, 330
mid us Aw., 41
obscuius Sui), 20, 2!'0,

2tl(j
ovatus Aiw., 3.5
jiachyciit'iiuirt, f,w,, 35
]ialu>stiii;us A«'., 328
patcllatiis Mill)., 71
pcmiitar.sis /'«//., (JO
jilmiiipes Srn/i., tjt)
jiluiiiitarsis /•>(//., 37
pijeu.stus A((i., (i8
puUdier 117^-., 21, 304
quadrilauiellatus, Lw.,

331
ram iter /^w., 52
reinotius ]V/k., 24, 317
rufK'oriii.s Lw., 03
scapularis Aw., ()4
suoparius I.ir., 70
scparatus H7i-., 24, 31(5
seiiuax U7/.-., 24, 317
setit'er /jr., 30
Betdsus A(('., 73
sexaiticulatus A?/"., 02
soccatiis \V/I.:, 24, 317
SOCMIIS Aw., 40
6]i!fndidiis Aic, 44
Sjileiididuliis A«'., 327
Btilioiliaturi A»'., 42
taiiyjius Ai/'., 71
ft'iicr Aw., 4!>
teriuiiiatiis \Vlk:,2-i, 310
li'liioiis Aw., 33
fdlr.-^ilM Ah'., 47
linif.'isidiitim .'-Vn/, 28?
Tun'iilMlis tw.^ 5lj

Doliuhoiniri variiis H7/.-., 21, 304
vittatiis Am'., 55
xantliDciieiiius Lw., 'M
ziczac iri'd/., 10

Knrostomenis, 230

I'liit.iistis, 153

Miitaisus tMiues Lir., 154

Oyninojitenius, 75, 332
(iyiuiioptuniu.s alliict'ps Aw., 85

l)ail)atulus. Aw., 82
c)ialt:(M;hrii.s Lw., 335
coxalis /.UK, 335
cra.ssic.'uida Aw., U5
dtdiiiis Aw., !»5
di'.spicatus /.!.•., 00
dirtitdii.^, /jW., ill
exiguii,>i A(/'. , 337
exilis Lw., ^4
fiiiilniatun /.»)., 80
tlavu.s Aw., 80
fieiiiH'iis A»'., 88
liiiiiiilis y,w., 330
lieviiiatus Aw., 87
leiicospiliis Lav., 99
huiitVr Aw., 89
nieiii>cus Aic, 330
inimUus Aw., 90
iiigriliailuirt Aw., 91
op;i(;us Aw., 93
parvictornid Aw., 92
politus Aw., 94, 334
pusillu.s Aw., 334
scotias Lw., 81
ppectaldlis Aw., 85
sulidilatatus Aw., 80
suhulatus Lw., 80
tristis Aw., 83
ventralis Lw., 97

naUericeni.s, 119
Ilei'costoiiius, 11(5
Heicostouius unipolor Lw., 117
HtHei'opsilopus, 230
llydropliorus, 211
llydropliorua alboflorens TT7/-., 216
chrysoloiiiis IK//-., 215
glalier \V//c., 215
iiiiiotaturf /.w., 212
notatus /iell., 305
parvus Aw., 210
j)irata Aw., 214
I spiiiitnanus Zilt., .3(^5

' viridiHos Wlk., 215

, Hygroc(d«utlins, 17
I llyijrdctdcutlnis latipes Lw., 17
' ll/pi)iiliyllusf US

INnKX.

.i.j ;

Leiicostola, IT)!

L<'ucnst()la fiiiKulata Lw., IfiS

LiaiicaliiM, l!t">

liiaiicahis gcmialiH Lw., V,)\)

liyroiKUinirt, liil>

Lyroiieiirua cieiuIeMcens Ait'., 17D

Maclw'Primn, 148

MaiLTaiitostylurt, 230

Medt'tciMis, 21 «

MbdeterUH allpollor.'ns 117/.-., 2](s:no
flirvs()l(H^us||7/,-.,2ir),S(i!»
fxiistiis 117/-., 2(iM, \M)
plalitT 117/., 215 ;{iil)
lat.M-aliH .«.-'i//. 2!tl
iiiLrii|ms A"'., 21il
iniiirtiiii'iiiiirt Siiij, 202
v.'lf-i iir.. 21!)
viri.lillus 1I7/,., 21-,, 3111

McsistostyhH, 2:!(i

M('snl)k'pli;iiMls, -I'M) "

Miisca, 2S1)

Murtca IdDglroinis /■'///•., 289

NematopiOL'tus, !"/()

Oaristylii^, '2.W

Oeili]isilo|)iis, 2')0

Oi-tliocliilt-, 114

Oithochile denjinpta 117/.-., 11.% 318

Paraclins, !t7

Paraclius allioiiotatus Lir., 1(1?.

arcuatus Lir., lOl
Pelastoncurus, l(i:{, 'M~
Pelastoneuru.s al>l)reviatiis Lir., 338
alteriiaiiH Air., 33!)
I'ognatus Aii\, 10!)
l.Ttiis All!., Kill
laiiiHllatiis All'., 338
loncicaiiila Aif., 104
liiu'iiliiis All'., 10,")
vagans Air., 107
Peofles, 140
Placioncnnis, 10(i
Plagioiifiii'iis iitiivittatn?* An'., 100
Poi'phyroix, 142. :-!4(i
Porpliyrop.s tiiiiiipi'iiiiis An'.. 14')
loiigipes All'.. 34H
mt'laiiipiis Alt'., 144
iiicricoxa Air., 145
pilos.c'oi'iiis 117/,-., s08
rotuiiilict'ps All)., 14(J
Psilopus, 220

Pailopus all.ifoxa 117/-., 243. 30"
allioiiotatu.s All'., 27.')
aiiiatus U7/., 242, .306
biuolor y.it'., 2fcW

Psilopus calcaraliia An-., 272
caiiilatiilu-i All'., 271
camlatiH W'ml.. 2:10, 2!)4
CliiVM(ipra!*i(us_) 117/-., 242,

2ti.'), 30.')
ciliafMs All'., 2i;o
cfitiiatn:^ All'.. 2(12
(l.'licatiis 117/,-., 241, 3(4
dillnsiis KVii/., 2:i4, •23:)
diiiiiiliatiis l.ir., 24ii
fcniniatiis .<-///, 23:), 2!t(', 20.5
lilipcs All'.. 2s(i
gfinniif.T 117/,., 24), 3(i,')
giittula, Willi., 237
liaT-ticiH 117/., 243. ;!20
ini'isni.ilis Mi'if.. 241
iiit'iiiiis I ir.. 272
ill Iir it IK 117/,-., -242. 3(17
jui'llli'lll-^ /ir.. 2''>*
If'pi.hiM (17/.. '243.300
limL'icnrni.s rir., 231. 204
itiaciila W'lnl.. 2:\4. 2'.'2

lllrl;illi]ins /,>('., 2.'')3

uiuii.liK Il7'i/.. '240, 2!ti!
iiiifKifiMiHuatus U'l/., 242,

■307
pnll.-ns H7Vi/.. •234. 275
patilmlatiis Su,/. 233, 2.'il
pt-ractus 1(7/-.. '243, 310
p.TiiKiiliciis M"/., 243, 320
jiilosus All'.. 2.'(!
jinitdliii'lisis .]/iiri/ , 241
]isittaiiiiii'< All'., 2isl
ra.li.iiw .l/wr,y..240, 297,2:'8
Ir^ayi HV.-/., 2:;2, 203
scalier All'.. 2')0
scintillaiis /jr., 273
scolilnatiii' /jr.. 2(18
siplio Soil, 232, 247
sipl.d Mi'ir,/ . -241. 207
solidiis 117/ . -243. 310
piiavimii 11'./.. 242, licJ
tciuM' All'.. 2.'^4
iinguliv.'iia M7/-., 243. :no
Uiiit'asfiatiis Sm/. 232, 1>>'.)
vaiicgafns An'., 27*^
viiL'o Willi., •24i", 20.')

Rliatriiiii.\ir;\. IIK 'M''<

Kli,iL.M)ni'H' ns pdlvi-lirninnr; Aic. 34')

Khapliium. 1 to

HIiapliiiiMi iiii-'tiliri', 141

Saucropus. 224

Sauciopiis iliinidiatn-; An'., 22.'>
lulicllu- /."•.. 2-I('i
siip.'rliic'iis Air.. 227

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3'»0 INDEX.

Hcfllns, 200

buelluM nvidiis Aw., 207
exiistus nik., 202
fUiffruH Ah-., 2(t!t
si)iiiiinamis }Cit., 204
PciapiiH, 2;jo
SiiiiliotUH, 147
t?yl)istroma, nT)
^iyiiipycnus, IS.*!
Hyinpycnurt frontalis J.w., 188
liuHatuH Ai/>., ]81»
iiodotus J,w., 1!)]
tertiaims Aw., 187
Synarthrus, 134
hynartlirus barbatns Aw., 138

ciiioroiventria Lw., 137

Synarthrus pnlniaria Liv., IS.")
Syntornion, I'S.i
SystHnus, 139

Tacliytrechns, 10!)

Tachytrechus angnntipennis Aw. ,113
moct'hnH A//'., Ho
vorax Aw., 112

Touoliophorus, IS.*)
Thinophilus, 148

•Xantliochlorus, 223
XantliodiloruH lielvinua Aw., 224
Xiphandriuiu, 141

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