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6

i'Ii-A.3SrS^A.OTI03SrS

OF THE

AMERICAN ENTOMOLOGICAL SOCIETY.

VOLUME XI.

On the North American ASILIDAE (Dasypogoninae, I^a-
phrinae), with a new genuH of SVKPHIDAE.

BY S. W. WILLISTON, .M. I).

In the following pages I have endeavored to tabulate the genera of
Diittypogonlnne and Luphr.'tin/; from the United States. The genera
Sphagens from Cuba, Archilestn's, LanfaiiniK, Mt-gapoda and Pseudorus
from Mexico and Psilocurm from Te.xa.s are not included, all of which
have but one known species each. Dhouinn (I .sp. Tex. and Fla.)
and B'ticotfen (1 sp. Texas) are unknown to me and their positions hae
hence from neiiessity been wholly drawn from figures and descriptions.
On the other liaiid there are added Tn'rlix, Ilidtropogoa, llyparevh'm
and Maria, not hitherto recorded from North America ; whether cor-
rectly or not the detailed descriptions I trust will show. A new generic
name is also proposed, and the earlier name of Ih-voiuijia adopted for the
species of DonfttiiteH. Lopunix * pi'rfifttrin'it Bigot from California does
not belong in that genus, nor can it be well placed with Catiiniritx to
which it is most nearly allied. Moreover several species now placed
under Ct/rfopot/oii are provisional, atid will some time require generic
. separation. Altogether then, with tlio genera and spe<.*ies herein added,
thirty-five genera with one hundred and twenty-five species of Daxt/po-
tjoiilnae and eleven genera with fifty species of Lnphriiiaf represent the
extent of our knowledge in these two sub-families in North America.

The Asi/into' are but little known. From the Western regions I
know three species of Mttflophorti, three of Prumarfnis, three or four
of PriivtacHiithux, five or six of Kni.e, with others of To/nn'riix,
Marln'iHHs, and a numb»>r whoi-ie positions I am in doubt about. Om-
iiiafiiis, two species i»f which I know from New England and (leorgia,
I have not yet seen elsi^where.

lUANS. AMKIt. KNT. SOC. XI. (I) ItKCEM IIKU, 1 SSS.

S. W. WILLI8T0N. M. P.

In using the table, the terminal spur of the front tibiae sliould hv
sought for with care ; in some of the species it is very small. It lies
across the inside of the joint between the tibia and metatarsus, and is
more or less oblique and bent.

Tahle of genera of the X. A. Dasypoooninae and Laphrkvae
(north of Mexico).

A.

Dasypoqoninae. — Marginal cell of the wing open
1. — Front tibiae with a terminal claw like spur 27.

Front tibiae without such spur 2.

2. — Pulvilli rudimentary or wanting 3.

Pulvilli normal 4.

3. —Face very narrow ; alxiomen very long, slender, narrow on proximal part ; hind

legs elongate, slender lieptoxaster.

Face moderately narrow; abdomen not unusually long, broader at base; hind
legs not elongate Ablttuttttiis*

4. —Head narrow, about as high as broad ; face narrow above, broader and

swollen below, in large part covered with hair. Large elongate specie?. ..5.

Head very obviously broader than high 7.

5. — Antennae with a terminal style 6.

Third joint of antennae very long, without style; fourth posterior cell closed
l»efore the border of the wing. Black species wit'.i or without red on tho

abdomen Onprioceras.

8. — First posterior cell open, not closed before the border of the wing.

Stenoposon .
First and fourth posterior cells closed before the border of the M^ng; third

joint of antennae shorter, style longer SeleropOKOn.

7. — Fourth posterior cell cloi;«d before the border 8.

Fourth posterior cell wide open, rarely nearly closed 12.

M. — Antennae elongate, of five joints [MyelaphiiH) 13.

Antennae not elongate, of three joints, and a terminal style 9.

9. — Face bare, except on oral margin; abdomen elongate, cylindroiiial ; anterior
intercalary vein continuous, or nearly so, with the fourth vein, the last
section of fourth vein obli(jue, sinuous, closing or much narrowing the

broad first posterior cell. Large, or very large species iflicrostyllllll*

Face pilose or hairy, more convex 10.

10. — Abdomen cylindrical, not narrow at the tip, elongate; near the base of
second and third segments with white pollinose emarginate cross-bunds;

wings blackish Dimonfa**

Abdomen less elongate, witii five or six white pollinose cross-bands 1 1.

11. — First posterior cell open, scarcely narrowed, face broad Lapliystia.

First posterior cell much narrowed, or closed Triclis*

12. — Aatennae elongate, composed of five joints; nearly bare species 13.

Antennae less elongate or short, of three joints, with or without :> short or

slender style 14.

13- —First and second joints of antennae of nearly equal length, third elongate,
fourth short, iifth elongate and densely pubes«'ent, third and fourth not
lobed at tip CeralurgUK.

AMERICAN DIPTERA.

First joipi about three times as long us the second, third elongate, fourth and
fifth of nearly equal length, third and fourth at the tip with two lobes, or
processes, reach insf to about the middle of the following joint.

Myelaphns.
14.— Style of antennae short, thick, obtuse, not easily distinguished from the third
joint, or if so, forming an apparent joint. Small or rather small species,
nearly bare, shining or metallic black, with narrow or cylindrical abdo-
men and large wings; face flattened, bare except below, hind tibiae pilose
en the inner side la.

Terminal style small, more slender than the joint, apparent, antennse shorter
if elupgate and style indistinguishable; the species not bare but thickly

pilose 16.

15.— All the tibiae and the hind femora with short strong setie.. ..Rctbodopa*

Hind femora without such sette Dioctriw.

U.— Face distinctly convex in profile, swollen orgibbose* 17.

Face flattened or gently convex 19.

17.— Head as broad or broader than the thorax, front ut base of antennae flattened,
not projecting in profile; terminal style of antennae slender or differ-
entiated from the joint 18.

Head narrow, .\ntennae situated upr-.j a convexity, thence receding to the
facial tubercle which is at the lower part of the face; antennae elongate,
style short, obtuse; abdo'nen short; thickly pilose species, the brietles few

and hair-like DicoIoilUIH.

IS.— Thickly pilose species: the gibbosity of the face rea(rlies to the base of the
antennae; anal cell usually open* Cyrtopogoil.

Thinly pilose, more pollinose species, the convexity of the face on the lower

part, anal cell ustially closed Dnulopogon.

10. — Abdomen elongate; front broad anteriorly, narrow behind. ..Plesiommtt.

Front not narrowed behind ^ ^^•

3U.— Hind tibiae towani the tip, and their metatarsi, much thickened 21.

Hind tibiae not, or but slightly, thickened toward the tip; metfuarsi not
thickened 22.

Head much broader than high, transverse, ''goggle" like; abdomen short,
wings large Ilolcocephalu.

Head only moderately broa<ler than high, not at all sjjectacle-like in appear-
ance Ilolopogon.

Ab<lomen with thick recumbent pile above; thickly pilose species; antennae
slender PycnopogOII.

Abiiomen without such pile above 23.

Slender, nearly bare species; face perpendicular, straight or gently concave,
narrowed above, bare, except on oral margin ,.24.

Face gently rounded, 'not prominent below, in large part hairy, not or but

slightly narrowed above 25.

—Thickly whitish pollinose; abdomen flattened, usually reflected upward,
third joint of antennae and Mtyle both slender Stichopogon.

21.-

22.-

23.— i

24

•Several species are placed provisionally under Cyrtnpogon in which the facial
gibb4»sity id small, and the bodj thinly pilose. They may be distinguished by the
abdonitn not being broad, and having white pollinose cross-bands; in some the
wiiigij have small bi4t distinct clouds on the cross-veins.

8. W. WILLI8TOX. M. I).

Less thickly pollinosc; abdoraon cylindrical, u little broader nt btise ; third

joint of antennae short, broad, style minute ? Htkbropogon.

2^. — Large, elongate species, style of antennae short Callinicns.

Moderately large, not much elongate 2fi.

26. — Abdomen broader at the base, depressed ; thorax much convex above, anten-
nie slender, style long and slender (compare species of Cyrtopogon),

AnisopoKon.

Abdomen short, cylindrical, antennae moderately long, style short. Black

with bright golden yellow opaque poUinose markings on thorax and

abdomen ** Ijaparus ? ** (piotitarsis Big.)

27. — Large species; face bare with bristles on the oral margin, in profile straight

or concave, the oral margin projecting 2S.

Smaller species: face convex on lower jwrtion, not projecting 29.

28. — Elongate; fourth posterior cell closed, usually a considerable distance before

the margin DeromyiA.

Le IS elongate; fourth cell (pen or closed in the margin, rarely a little
petiolate Saropogon.

29. — Head broatl and flat, face not gibbose, third joint of aitt<;iMiie slender,

elongate 30.

Head only moderately broa<ler than high; face gibbose below; third joint of
antennre more or less dibitfiil, style very short ; thorax and le^s with numer-
ous bristles: aUiomen broailest at the base, rather slender, subcylindrical.

liestomyia n. g.
30.— Abdomen finely punctulate, of nearly equal width, hind tibia' at the tip and

their tarsi only a little thickened; wings hyaline TaracticllS.

Abdomen snioi>th ; hind tibiie at their tip and their tarsi thi(;kenud (compare
\\ere NicocUaf scituln); antennal style slender, acuminate ; wings varie-
gated .SI.

.31.— Abdomen flattened ; in the female a little broader beyond the middle: in the
male near the tip, the last two segments of which conspicuously silvery.

Nicocles.

Abdomen of nearly equal width throughout, the last segment in the male nt>t
silvery, fourth posterior cell narrowed Blacodes.

B.

L.\PHRINAE. — Marginal cell of the winj; closed, antennae without a
terminal bristle.
1. — The veins at the distal ends of the discal and fourth posterior cells ii^the same

straight line, continu« tis, or nearly so 2.

The veins, etc., not in the same straight line, the vein closing the fourth {Kts-

terior cell more or less remote and oblique ,3.

2. — First joint of antennae elongate, slender; second posterior cell narrowed

toward the margin of the wing Cerotaillia.

First joint of the antennre much shorter than the third; first posterior cell

narrowed or closed, the second wide open Atoiliosia*

3. — First j)osterior cell narrowed or closed 4.

First jH)sterior cell wide open 6.

4. — Three submarginal cells, i. e. the up{>er branch of the third vein is connected

with the second by a short vein.. POKOIIOMoma*

Two submarginal cells 5,

if

■;«■

AMERICAN DIPTERA.

3.— Hind femora of nearly equal thickness throughout ; antennte with a distinct

terminal style; very large, robust, thickly pilose 8pecie8..,.IIjrperee|||a.

Ilind femora thickened toward the end; antennn without terminal style;

more elon^^ate, less pilose species A ndrenosomcu

6.— Thorax and abdomen nearly or quite bare 7.

Thorax and abdomen thickly pilose, larger species 8.

7.— Hind femora with spinous tubercles below IjAmpria.

Hind femora without spinous tubercles below llfairA.

8.— Densely pilose species; the abdomen short, broad, usually broader beyond tbe
middle, in the male sometimes more elongate; proboscis thick»..DaHyllis.
Less pilose, more elongate species; proboscis more elongate and slender.

I<«ptari».

mVRIiAPHUS.

Bigot, Bulletin Soc. Ent. de France 1882, No. 9, p. 112.
Clraturgujt Oaten Sacken (parte).

This proposed new genus of Dnifypogoniaat hat) been insufficiently

tlutfacterized by its author, with a very brief diagnosis of the type

Kpi'cies as follows :

".HyelaphUB melail ^.— Long. 15 mm. Totna niger, abdomine niiido;
halUribua et pulvillis ftavia ; alia nigria, intua et apiee parum diluHoribua. Oculia
nudta,— California."

I have before me a specimen which I believe to be this, together with
two other species closely allied, and which appear to oflfer sufficient char-
acters to justify their separation from Ceraturgm, under which one of
them had been described by Baron Osten Sacken. From the light that
these species afford on the value of the characters in this genus and Cera-
turyua it seems desirable to give the structural and specific characters in
detail.

Hmd broader than the thorax, considerably broader than high. Face a little
li'S!! than a third as wide as the head, its sides tery nearly parallel, diverging but
very slightly below, bare, smooth and shining, on the oral margin in front with a
tl<iii row of moderately long bristles; in profile gently receding, above the middle
with a moderately large obtuse tubercle (wanting in M. lobicornia), not reaching
quite as fur forward as the base of the antennae, between which it is gently con-
c» ve, and below the tubercle to the oral margin considerably receding, nearly
straight; the oral margin in front is distinctly above the lower borders of the
eyes, so that the lateral margins of the mouth are considerably oblique, and
straight. AiiteiniHi situated upon a large obtuse tubercle, about as long as the
dorsum of the thorax, composed of five joints as in Ceraturgua, all of which are
distinctly sepiirated from each other: first joint cylindrical, elongate, rather more
than three times as long as the second; second joint short, but little longer than
bruad ; third joint distinctly longer than the first two together, somewhat com-
pressed, only a little broader, terminating in two lateral lobes, or processes, which
extend as far as the insertion of the second joint of the style ; fourth joint, or first
Joint of the style, somewhat Y shaped, the terminal lobes being rather more than
one-half of the entire length of the joint, longer and more slender than those of

(2)

S. \\. WILMS'HJN. M. I».

the tliird joint; rtfth joint, or second joint of die !«tyle, longer thun the entire
length of the preueding, narrowed, almost pedicrellate at the base, flattened beyond
the tip of the loltes of the preceding joint, and then obtusely )M>inted, somewhat
irregular in shape and shallowly silicate, clothed with very fine short pile.

Thorax convex, nearly bare, wholly without niacrochaetae except a few very
short intni-alar ones. Legs rather stiMit, without noacrochaetae except a few short
ones at the tips of tibiae and the basal tarsal joints. Wings as in Ceraturgua
erneiatun, but broader, marginal and first (Mtsterior cells open ; the posterior inter-
ualary vein arises from the posterior basal transverse vein a short distance from
the base of the discal cell. In M. meltvi the type and M. ru/aJt (new sp.) tiie
'ourth posterior c^ell is broadly open, in m*". lobicornia closed and petiolate. An-
terior cross-vein near middle of the discal cell.

Abdomen in structure rather like that of Dioctria, shorter than the wings, the
sides nearly parallel, or gently concave, to the tip of the tifth segment in the male,
in the female the tifth :^egnient gently narrowed behind : a little narrower than
the thorax in the male, in the female al»oiit as wide: Hattene<l, so that transverse-
ly it is only gently convex above, gently grmived at the incisureSy each segment
l>eing gently convex longitudinally ; smooth, nearly bare, except sparse very short
pile; segments of nearly ei{ual length, the sixth a little shorter, the seventh very
short. Hypopygiiim small.

This deHc.'iption is drawn from a male of M. lUfMis and a female M.
rn/uK which ajrree closely in structure. In M. lohicomh the antennal pro-
tuberance is more obtuse, and the face more flattened, in profile very
narrow, and the prominence near the middle wholly wanting. The
fourth posterior cell is also closed a little before the mar<;in of the wing,
and the first posterior cell strongly courctate.

From the diagnosis of. this genus given by Mr. Bigot, there are some
diiferences, which might render the recognition doubtful. The antennae
are not as long as the head and thorax combined, but considerably shorter,
and the third joint is at least a half longer than the first; the third
joint has ttco processec like the fourUi joint. There are but two joints
in the style, as in Ceraturgm. From the irregular shape of the last
joint, it might be thought to be divided, but such is not the ciise. Three
joints in the style would be anomalous I think.

1. Myelaphas mclas.

f Myelaphtia melaa Bigot, 1. c.

%. — Bla..k, abdomen shining; halteres and pulvilli yellow; wings black, more
dilute behind and at the tip. Length, 14^ mm. Face smooth, shining, bare, in
the middle on the tubercle broadly and indefinitely pitchy red; bristles on the
oral margin yellowish white with one or two black ones on the sides ; beard short,
sparse, black. Front on the sides near the eye with a few short black bristles.
Antennae wholly black ; on the upper sides of the first and second joints, with a
few short black hairs. Thorax deep shining black, above with a blue reflection,
the dorsum wholly without markings, but covered with very short sparse black
hairs; a minute spot on the humeri red, and the post ulur callosities pitchy black.
Pleurae very smooth, shining, except on the iip{)er part of the sternopleurae.

-f, J

m

I-

AMEKK wN UIPTKRA.

uikI oil the inesoplcurae. where it is niodorutely thickly «>uvere<l with short pile,
black abuve, whitish helow. All the ('oxuc on their outer sides with sparse whitish
pile, and at their lower ends with a few short whitish bristles. Halteres yellow,
the extreme base a little brownish Al>domen shining black, with very short,
rather sparse black hairs, slightly intermixed with whitish on the sides of each
segment; on the hypopygiuni with longer light yellowish or whitish pile. Legs
deep black, the front and middle knees verj* narrowly yellowish, the pulvilli and
base of claws light yellow : on the front tibiae below, their tiirsi and on the mid-
dle tarsi less so. with redlish pubescence. Wings blackish on the anterior portion
toward the base, along the fMisterior and outer part more dilute, but still slightly
tinged with brown or blackish : first posterior cell not at uU narrowed ut the margin,
fourth posterior cell broudly open, the fifth vein at the tip slightly curved backward.
One specimen. Kern Co., Calif«>rnia.

•2. MjrelttphiiM rufus, n. sp.

9.— Yellowish red; third joint of aiitenuue and the style, probostris, occiput,
tliree broad, abbreviated strijjes on the dursum of the thorax, two spots on the
lower part of pleurae, and tips of claws black. Leiiijth 17 mm.

Face, front, and first two joints of antennae reddish yellow, shining, the face be-
low, near the eyes, and on each side of the base of the antennae lightly yellowish
(lusted. Bristles of the oral margin yellowish while; on the sides of the front a
few shorter ones yellow. Third joint of antennae and the style deepbhick. I'ro-
lM>sci3 black, the palpi yellowish. Occiput black, thickly yellowish j)ollinose on
the sides; (xrcipito-orbital bristles short, thin, and like the sparse short beard
below are yellow. Dorsum of thorax yellowish red, with three broad black
stripes, separated from each other by linear intervals; the lateral ones begin some
ilistanctf behind the humeri and extend to within a short distance of the scutel-
iuin. on the jM)sterior j>art narrow: the middle one begins at the i)rothorax and
lias well defined edges to the transverse suture, iiiunediately l)ehind the suture
ilie stripe becomes obsolete. The liorsum isdotbed with short, not very abundant
goldeu pile, and has three or four short, incf>nsptcuous, yellow, intra-alar bristles.
I'leurae yellowish re«l. except a large spot al»ove the middle coxae, an<l another
nearly coniluent, smaller one above the hind coxae, which are smooth, shining,
pitcliy black. On the mesopleurae and ujiper part of the sternopleurae with
golden yellow pile, tuoderately dense; just bev-'ud this there is a smooth shining
space. Halteres yellow. Abdomen wholly reef, darker, somewhat ferruginous
along the dorsum : very shining and clothed with sparse, short golden pile. Legs
wholly reddish yellow, the tips of the claws only black; pulvilli and the base of
the tibiae lighter colored, the coxae on their outer sides with whitish pile. Wings
very distinctly blackish clouded on the outer part, the veins blackish, at the base
the veins and ce'Is are yellow. First and fourth posterior cells a little more nar-
row at their outer parts than in M. vielaa.

One .specinun, Kern Co., California (11. K. Morrison).
It is probably that, its in the following species, the winjrs in the male
umy be, not yellow, but brown or blackish toward the base.

'■i- Nyelaphus lobieornin.

^'eratuiyu-s lobieornin Osten Sacken, Western Dipt. 287.

" % 9- — Heail and thorax wholly black, coxae, trochanters, m<ire or less of the
base of the four fr<tnt femora, tips of tarsi, narrow base and lateral margins of

8

S. W. WILLISTOX. M. I».

abdomen black or blackish; legs and abdomen yellowish reti. Wings in the male
tinged with brown, darker, sometimes dark brown in front toward the base: in
female the basal half yellowish, the posterior and distal hulf brownish." (Face
nearly plane, without tubercle. Wings comparatively narrow ; first pt^sterior cell
ooarctate, fourth posterior cell closed and petiolate). Length 10-12 mm.

I have a single male gpecimen from Kern Co., that I believe to be
this. It agrees very well indeed with the original description, except
that all the femora from the very trochanters are reddish yellow, the
venter b red and the wings are dark brown before the anterior cross-vein,
beyond which there is a large space very nearly hyaline ; the posterior
portion for the whole length has a distinct blackish tinge. However,
these diiferences are such as Baron Ostun -Sacken himself noted, or an-
ticipated. The only reason that I am at all doubtful of the identity is
'that the author did not speak of the closed and briefly petiolate fourth
posterior cell, a character, however, tha< .s probably more or less varia-
ble. The hind femora in this species are stouter and more thickened on
the proximal portion than in the preceding species.

DIOCTRIA.

4. Diortria nitida n. sp.

% 9- — Black shining, thorax yellow piloise and pollinose. niystax black; tibiae
yellow, tips black. Length 11-1.3 mm.

Much like J), allnun but larger and all the tibiae light reddish-yellow,
except the tips. Face bright golden yellow, mystax and pile of the front
black. Antennae in structure quite like those of D. alhius, black.
Thorax rather thickly clothed with golden-yellow pollen and pile. Pleu-
rae shining black, with four rather small patches of dense yellowish-gray
pollen, and similar ones on all the coxae, the front and middle coxae with
white pile. Abdomen deep, shining, somewhat metallic, black. Legs
black, front and middle tibiae except the immediate tips, and the hind
pair a little more broadly.n-eddish-yellow. Wings nearly uniformily
blackish, veins yellow at the base.

Four males and one female, Washington Territory.

5. DIoctria albluii Walker.

From comparison of five specimens from Washington Territtiry with
thirty from Connecticut, I am at a loss to find differeneer that will
justify thei^ separation.

6. Dioctria Nackeni n. sp.

% . — £lack, basal half of wings light y>;llow, distal half blackish ; anterior
femora below, tip of middle and hind femora, four front tibiae except their tip,
and basal half of hind tibiae reddish-yellow. Length 7 mm.

Face yellow above, pilvery below; niyatax, pile of front, of antennae, and the
beard white. Antennae black, rather pcute at tip. Dorsum of thorax densely

AM BRIO AN DIPTERA.

oiivere<i with whitidh yellow |h>llen. the pile of neuily tlie stiino color. Pleurae
■hilling black, with timull patoheH of yellowiiih-white pollen. Abdomen slender,
wholly diiiiiing. Liiii<* hluek, the front femora on the under side, the tip of middle
fenioni uiid more or loss iiloiig the under side, the hind femora at tip, the four
front tihiae except the immediate tip and the hind tibin on rather more than
the busal half, light reddish-yellow ; hind femora much thickened. Wings on the
banal hulf light yellow, from the crosit-veins biaokitfh.

Three specimens, Washington Territory.

This species must be very simihir to the s}>ecimen mentioned by Baron
Oaten Sacken in his Western Diptera p. 288, from the Whit« Mts.
The hind femora are comparatively more thickened than in ' . I'fhhis.

liAFIIYSTIA.

7. L»phyMti« sezlkBcintn.

Daiti/pogon fi-J'asiunln.^ Say, J. Acad. IMiil. iii. .lO. I; Compl. Wr. ii. fA;

Wiedeman, Auso. Zw. In.*, i. 40S. »J8.
Lnjiiyctis Krfa^ciatus StrhintT, Vi-rli. Zitol. Bdt. (m-s. ISrtfi. filtS.
, Lnphi/itlia .ser/usciala Loew, B«M-liii. Kiit. Zoit. IS74; ;!";>; Osti-n^ Saokun
Citt. Dipt. ; Bigot, Bull, Soc. Eiil. Fr. IS7i>. s7.
Triclin notata Bigot, Annitles ??<>«. Eiifoiii. F*raii<'e. 1 STS. 4;i."i ; id. Bull. Soc.

Ent. Is7<), S7.
Lnphy-^lia xnbfaHcialn Bitiot, ilMd. Aininle!* IS7'J. 'I'M.
'i'he >renus Lnphif»tt(t is intermediate in position between the Danypo-
ifiiiiiiine and fjfifthriiiiu'. Onr sinjrle authenticated .species seems to have
more affinity with Lupht/ntlu Hiihntimln Lw. than with Litphtfvtlx y^iyan-
tflla Lw. and may therefore remain in tiiis genus. In L. nex/anciata
fh«; marginal cell is not clo.sed, but distinctly open. I have therefore
placed the genus under the Da.sypogoninae. It resembles the following
species, but has a wider face, and open first postt^ior cell.

TRICXIS.

Loew, Betnerk Uber d. Fain. Asil. 17 (I Mil). Gantricheliut Uondani.
^- TridiM tttgn.<« n. :<p. -(Plate I, iig!«. (*. t>a.)

9.— Black, whitish pollinosf; iitmd wlndly with light pollen and pile; segments
<>{ ahdonieii with a large semicircle in front and the anterior angles shining.
Wiiijrs hyaline. Length <>J mm.

Fact' thickly white pollinose, and with white hairs in ilie :;:yr,t;:x, reaching
nearly to the antennae; straight on the sides, in profile gently swollen below.
Antennae hiat k. first and second joints short, of nearly ecpial length, thinl broad, not
longer than the first two together; style very small, short. Front faintly brown-
ii^h ; occiput thickly white pollinose on the sides: heard white. Thorax black,
'he dorsum thickly covere<l with short yellowish-white recumbent pile, along the
"liddle in front a shining stripe; bristles slender, black. Pleurae thickly white
pollinose, with a small shining black sp«»t above the middle coxae ; scutelluiu pilose
with a row of thin bristles along its edge. Alxlnmcn short, moderately broad,
not much narrowed posteriorly; shining black, ti»e posterior margins of the seg-
ments narrowly red, but obscured by the thick white pollen which leaves the
black to form a large semioval s[K>t, nearly reaching the hiiul margin in the

I'UA.VS. AMKR. K.NT. SOC. XI.

(3)

DKCKMBKII, I 880.

10

S. W. WILLISTON. M. 1».

middle and only narrowly separated from the small black ?|xit on tlut anterior
angles which extends t«>, or nearly to, the iiind margin. A circle of long bristly
hairs near the tip black; otherwise the short, not abundant pile, is yellowish,
whitish or white. Legs black, rather thickly clothed with short tine white pile,
along the under side of the hind femora and tibiae a little longer and more thickly
erect pilose, as in Dioctria ; bristles mostly white. Wings pure hyaline, the first
posterior cell closed a little Itefore or at the tip. the fourth at a considerable dis-
tances before the border.

One specimen, Kern Co., CaUtbrnia.

On account of the closed first posterior cell I place this species under
Tric/ix, with which it seems to ajrree otherwise very wel!. PHilocurns nii-
ifiiixcuins Lw. is apparently related, but the first posterii>r cell is wide oped.

IIABROPOGON Loew.
Da-;tili«cus Rondani.

A sin<;le specimen of a species from California seems either to belong
to this <i;enus or is closely allied. I have no specimens for comparison.
Whether the structure of the face is the same T do not know. In my
specimen the mystax is confined to the oral niaririn Jis in Stichnpngon.
T give therefore briefly the structural characters of the present species.
I believe the genus has never been recorded frtim this continent.

In structure, except the head, throughout like species of Stenopogou,
but less pilose. Head considerably broader than high, but scarcely as
wide as the thorax. Face very narrow, the eyes separated by an ex-
tremely narrow interval from the antennae ; their inner margins above
and below gently divergent, so that the distance between the angles below
is a little greater than that above. Face in profile gently concave from
antennae to oral margin, nearly perpendicular, wholly bare, except a thin
short row of soft bristles on the oral margin, which is projecting as in
species of Stichopogon, Daromtfia, and Saropogun ; front only gently
excavated, widened above. Antennae short, first two joints of e<:|ual
length, third a li»*l'i longer than the first two together, broad, scarcely
more than twice as long as wide, obtusely pointed at the tip and with a
very small, almost microscopic style ; beard short and thin. Thorax bare,
except with very minute hairs, and moderately strong, not abundant
bristles on the back part; scutellum with four bristles. Abdomen slender,
elongate, cylindrical, broader at the base, bare. Front and middle
femora with two posterior preapical, and the hind femora with an
anterior row of bristles. Fourth posterior cell nearly closed.

The head and antennae may perhaps be like those of Puilovuruit, but
the face is muc'i narrowed above, and wholly bare, except the bristles
below; the abdomen is by no means "flach und glcich breit," and has
a star of spines at the tip in the female.

9. Hi

9-

AMERICAN niPTEBA.

11

9. Habropogon bilineatus n. sp. (Plate I, fig. 8.)

9. — Black, gruy p<Mlino9e, inystax white; dorsum of thorax yellowish -gray,
with two slender opaque black stripes; 1-5 abdominal segments with red borders;
under side of all the femora and base of tibiae red. Length 15 mm., of wings
9 mm.

Face andifeiystax white, the former opaque; front a little yellowish gray, the
few short bristles black. Antennae and proboscis both short black. Dorsum of
thorax gray with a yellowish or brownish cast, the ground color of humeri, post-
alar callosities and seutellum appears to be yellowish red; in the middle two
slender narrowly separated, but very distinct, opaque black stripes, obsolete in the
posterior part ; bristles wholly black. The ground color of the pleurae apparently
in large part reddish, but concealed beneath dense, very light colored pollen,
which also covers the coxae. Abdomen black, rather thinly yellowish grayish
pollinose, the terminal segments more shining, the sides and posterior margins of
the first — fourth segments and the sides of the fifth red: the pile is very short.
Anterior and mrddle coxae thit kly clothed with white pile. Legi^ black; the un-
der side of ail the femora broadly red. the base of hind tibiae and the four front
tibiae, except their tip, red, or yellowish red. Wings nearly hyaline, veins black.

One .specinien N. California (O. 'I'. Baron).

IMCOLONVS.

10. Dicolonus simplex Loew, Centur vii. :>C,. i Plate I, fig. 4.)

I recognize this species in two male ant' one temule ."specimens from
Southern California. The pile, however, appears to bo lij^hter colored,
and in only one specimen is there any black pile on the front, and none
have any at the tip of the abdomen.

€YRTOPO«ON.

11. CyrtopoKoii dnMylloides n. sp.

^ . — Black. thi(!kly bhu^k pilose; mystax thick, light yellow; coxae with white
pile. Abdomen, except the tip, with long, dense, furry, erect, light yellow pile;
tarsi red: wings hyaline, the distal half in front blackish. Length 17 mm.

Face very thickly light yellowish pilose, on the lowest portion somewhat black;
beard white. Style of antennae short, thickened. Pile of the front.occiput, and of
first twr> joints of antennae black. Thorax thickly black pilose, dorsum nearly
opaciue, on the sides of the miiidle in front a little brownish pollinose'; bristles
not strong. Seutellum thickly pilose, not pollinose, conve\. Atxlomen nearly
parallel on the sides, shining, but its shape and color nearly concealed by the very
long, erect, furry, yellow pile, the first segment with a very little black pile above
on the sides, and the last segment and hyftopygium wholly thickly black pilose.
Coxae white fiilosc Legs black, densely black pilose, hind tibiae deep red, all the
tarsi lighter reil, the front pair with white pile. Wings hyaline, the outer half in
front from the margin of the third vein blackish, a little lighter at the tip, and
fading out behind.

One specimen, Washington T' rritory.

This remarkable species falls into the group of I. A. aa. of Osten
Sucken's synoptical table (West. Dipt. p. 21)4) and is allied to C. auri/ex
0. S. from which it will be readily distinguished by its much larger size.

I •■

12

S. \y. WILLlSTn.N. M. I>.

bliickMh cloud oil outer part o'' wings, red tar^ii and the more abundant,
denser and wliolly yellow pilosity of the abdomen, except its tip.

12. Cyrtopogon plaiisor O. Sacken, West. Dipt. 297.

Four male and on»» female specimens from Colorado agree perfectly
with the dcscripti ,. ^ .

i:{. Cyrtopugon eallipediluH Lo«w, 0. Sacken, West. Dipt. 296.

A female from Southern Wyoming (alt 8000) agrees throughout with
the description.

14. Cyrtopogon praepeii n. sp.

^ 9- — Scuielluin convex above, pilose; legs densely pilose, wholly black; front
tarsi of the male with a single row of silvery pile from the very base and the
terminal joints of middle tarsi with a disk of black pile, longer tljan broad; sides
of the abdomen at base wiiite pilose, siiorter and black on distal portion. Length
11-12 mm.

%. — Black, shining. Face tliickly liglit yellowisli pollinose, but concealed be-
neath the dense light yellow mystax, black on the oral margin. Beard, anterior
and middle coxae, tirst two segments of the abdomen on the sides, and all the
femora below, and on the [wsterior part, thickly, nearly white pilose; front, upper
part of the occiput, basal join's of the antennae, dorsum of thorax and scutellum.
dorsum of abdomen and sides from the second segment, upper surface of femora
and all the tibiae black pilose. Dorsum of thorax with two large spots on each
side of the middle in front, brownish pollinose; pleurae thickly light pollinose.
Legs wholly deep black, the posterior tibiae at tip and their metatarsi with golden
r. i pubescence. Legs not very stout, nor the bristles very strong; anterior ♦arsi
slender, on their upper side for their whole length with a row of short, dense,
silvery pile, not parted, except at the tip, the surface below is smooth, but along
the sides there is a fringe of very short bla»;k bristles : two last joints of middle
tarsi with the disk of black [)ile narrower tiiaii in the other species, longer than
broad. Wings nearly hyaline.

9- — Like the male, but the face is a little more bare upon the sides, the pile
throughout somewhat shorter, the dorsum of the thorax Jnore grayish pollinose
in front leaving two slender medium dark stripes: the light pile of the abdomen
is less abundant and extends on the sides to the fourth segment, ami the black pile
very short, on the posterir>r angles of the second, third and fourth aUlominal
segments there is a small silvery 8|)ot; the pile of the femora is more obscure, the
silver pile of the front, and the black disk of the middle tarsi wanting.

Two S and two 9 specimens, Washington Territory.

This species is closely allied to calUjtedilm, v.ymhdllxtd, pfdiixor and

the following:

15. Cjrrtopogon n. sp.

Represented by three males and two females from Northern California.
The males throughout are nearly like praepcs, except in the tarsi, which are
shorter, and the front and middle pairs are ornamented like nfinhalUta is
described to be, that is the first joint of the front pair has but little silvery

AMERICAN DIPTERA.

13

pile, and on the other joints it is parted so as to form two rows; the
joints are wholly wanting in the black bristles, and the black disk of the
middle pair is very broad. The female is difficult to distinguish from
mracpes, but ^e front tarsi are not so slender, and or the sides of the
dorsuia cf the thorax, in front of the suture there is a large brown pol-
linose spot which is wholly shining in praepes. There can be scarcely
• doubt of the distinction of the two species, but I do not give it a name
till larger collections have been examined.

16. CyrtopOKOn prot'usns, 0. Sacken West. Dipt. 305.

A male from New ^lexico (from Mr. E. Keen) agrees very well with
the description.

17. Cyrtopofl^on nutcator Osten Sacken, West. Dipt. :H)7.

A mule and female from Mt. !iood. The uiale has the s«'cond and
third abdominal pollinose cross-bands narrowed in the middle, but entire.

IR. Cyrtopogon n. sp.

In size, shape and abdominal markings resembling (\ imgntnr^ but the
markings of the thorax obscure and the ungues black. The body is
almost wholly without pile, except the thin white beard ; the face has
sparse black bri.stles, the dorsum of thorax and scutellum bare, except a
row of bristles on each side of the former, and two on the border of the
Ittcter; the abdomen wholly bare, black, shining except the interrupted
cross-bands on segments 1-6, the femora are bare, the tibiae and tarsi
only with black bristles. The fan-like row of bristles in front of the halteres
is black, and the .species would be sought for under positit!om or undator
of Osten Sacken 's synoptical table. Washington Territory.

I'D. Cyrtopogon diibiiin n. sp.

9-— Scutellmii Mattened, sr.iy pollinose above: alxlonieii shining black, first
8«'.;iiient on the sides, and the four following v:'<i\\ interrupted posterior cross- bands
i>f ijray jMillen : femora black, tibiae and tarsi dark red; head, except the beard,
wliiilly black pili •, antennae black: wings with narrow brown clouds on the
cros^-veins. Ln^th II r.m.

Kace thickly whitish poUinose and densely black pilose, beard below white, on
the sides and nlmve black. Dorsum of thorax deep bhufkish brown with dense
Kfay pollinose markings as follows: A slender median stripe obsolete behind ; a
lHrg(! spot in front of the scutellum, slenderly prolonged on its anterior angles to
tbe inid<lle of the dorsum, the humeri, a sp«it on their inner sides, another large
<*'ie behind, concave on its inner border, and a smaller one on the post-alar
cillnsitit's. rieii ae gray pollinose; the fan-like fringe of hairs in front of the
halteres black. Abdomen with white pile on the sides in front; the last two seg-
nieiiis wholly shining. Anterior and middle coxae, and all the femora below
towards the base with long soft white jjile ; front tibiae on their inner sides and
their metatarsi with g<dden jaibescence ; hind tii>iae ut their tip and the tip of
their metatarsi with white pubescjenee, femora black, tibiae and tarsi dark red,

(4)

14

S. W. WILLISTON, M. I>.

the latter more brownish red. Wings hyaline in the basal half, distinctly clouded
with brownish on the distal half; the veins from the margin of the second longi-
tudinal ttt the beginning of the posterior basal transverse, narrowly but distinctly
clouded with brown, the veins at base of the second submarginnl, and the first
and second posterior cells less distinctly clouded.

One specimen, Mt. Hood, Oregon.

This species wilt fall with C profusus in Osten Sacken's synoptical
table, but its relationship is apparently closer to C. posititinun O. S.

20. Cyrtopogon ? nebnio Osten Sacken, West. Dipt., .309.

Two specimens from Washington Territory I believe belong here ; they
agree perfectly with the description, except that the style is a trifle shorter
than the third joint.

21 ? CyrtopoKOU n. sp. (Plate I, tig. 11.)

Resembles nehnlo very much, but hiis the third joint of the antennae
and the style very slender, linear, the face less gibbose, deep shining
greenish black abdomen, and the body more thickly pilose. The size and
wings are the same. I identified it at first as nebnio before I had seen
tlie Washington Terr, examples. Ten specimens, Como, Wyoming, (alt
8000 ft. ).

22. ?Cyrtopogon (fDciulopogon) n. sp. (Plate I, fig. 10.)

Has the wings of the two preceding, but the face more gib-
bose, the gibbosity rather lower, and the style of antennae a trifle
shorter. The dorsum of thorax has the markings similar, but is more
convex and compressed, and the median stripe from the very front thickly
clothed with long, erect hair, giving the thorax a peculiar mane-like
appearance, as in some species of Asilinae. The abdomen has ap-
parently posterior cross-bands of gray pollen. The convexity of
the face does not reach quite to the baae of the antennae, and it may be
the species would be better placed under Danbtpogon.

One specimen, Como, Wyoming.

23. TCyrtopogon gibber a. sp. (Piute I, fig. 9.)

f t Holopogon f appendiculatum Bigot, Annales Soc. Km. Fr., 1878, 438.

9. — Dorsum of thorax strongly convex ; front much excavated, facial gibbosity
slight, hind tibiae and tarsi thickened. — Black ; abdomen with narrow interrupted
anterior cross-bands and small lateral spots, wings hyaline, cross-vein and costal
cell at tip narrowly clouded with dark brown ; anterior branch of the third vein
angulated. Length 7 mm.

Face in profile only a little convex l>elow, gray pollinose and with whitish bris-
tles on the oval margin of the same color, but more pile-like above. Antennae
black, the first two j'lints of nearly equal length, the third joint not iwiue as lung
as the first two together, not very slender, style acute, aboii'. half us long as the
third joint, the tip with a brisMe. Front much exfiavuted on the sides of the
ocellar tubercle which has a few black bristles, pile of the occiput Ijelow white.

AMERICAN DIITERA.

15

Above black. Tliornx in profile remarkably convex and high, the convexity be-
ing greater on the front part, bare except with four rows of moderately strong
bristles; of a rich brown color, with an irregular white stripe on the side in front.
Pleurae dark brown, lightly pollinose. Scutellum small, bare except two erect,'
black bristles at the tin; metanoium thickly white pollinose. Abdomen gently
convex, and gently ancrevenly tapering from the base to the tip, brownish L'-'ck,
■hining, with distinct gray pollinose markings, as follows: on the anterior laargin
of the second segment with an interrupted narrow cross-band, and a little b-.-yond
U two narrow transverse spots forming an abbreviated interrupted cross band,
near the middle and touching the lateral margin another smaller spot;, third,
fourth, fifth and sixth segments with an interrupted abbreviated cross-band, and a
•mailer lateral spot near the middle. Legs black, femora with sparse white pile,
tibiae with white bristles, tiie posterior tibiae considerably thickened gradually
fh>in the base, the metatarsi also somewhat thickened. Wings hyaline, all the
cross-veins and base of first submarginal cell, and the costa from the tip of second
to the tip of fourth vein narrowly clouded with dark brown, a similar cloud at the
furcation of the third vein, the itnterior brunch of which is angulated and with a
minute stump of n vein.

Ono specimen, California (Baron).

This species does not belong in CyrU>pogon. but may be provisionally
placed here till a better place is found for it. It shows some relationship
to Holopoyon, but not as much as to several of the species from the West
now placed under Cyrtopogon. The structure appears to be the same
M the species described by Bigot as Hflopogvnf appendiculatnin
but it cannot be the same species, as will be seen by comparison of the
description o'i the thorax, abdomen, legs and wings. Cyrtopogmi cervn-
mtu» 0. S., must also somewhat resemble this. The convexity of the
thorax, which is " Kaputzenartig " resembles very much i\vAi o^ Pseudorm
iu'olor Bell as figured by Bellardi, and is seen in a less degree in our
Kpeeies of Holcocephnla. 1'he face in profile is gently convex from
the antennae to the oral margin, but is most projecting below. The
species is very thinly pilose.

PY€NOPOGON.

24. PjKCIIopogOfl Cirrhatas Osten Sacken, West. Dipt. 293.

A single male sptn^imen from Northern California. The dorsum of the
thorax is short black pilose »^^088 the middle. This species seems to be
rightly placed, but the difTerence between this genus and Anisopogon
must be slight. The short abdomen and the thick pilosity on its dorsum
will hardly allow the species to be placed under Anisopogon, but these
are the sole differences.

ANISOI>OtSOi\.

'^- AuiMopogoll Henilis Bigot, Annates Sue. £nt. Fr., 1878, 423.

A female with the preceaing species, from which it differs chiefly in
the abdomen being nearly bare above, clothed only with short black pile.

16

S. W. WILLISTON. M. D.

and is a little more elongate. My deternnnation of thj species may,
however, be incorrect ; the dorsum of the abdomen is not glabrous, the
pile on the under side is white, not yellow, the tibiae are wholly yellow, i
and the length is not more than 10 mm.

26. AniflopoKOa lautr** Loew, Centur. x, 34.

Two female specimens from Washington Terr, and California. Wholly'
black, with thick white pile below. Abdomen nearly bare above, tibiae
and tarsi red, the middle legs without the tufts of black pile, and the
wings pure hyaline (in one specimen slightly cioudeil along the veinej
near the base). The specimens agree very well with Loew's description,;
still a comparison of the males is needed.

NICOCLES.

.' Leptarthrita Steplieiis, Cat. Brit. Ins., 1820.

.' I.iopogon Loew, Liiiiioa Kiitoni. ii, 1^84, 1847.

? Aphamartania Scliiiier, Verh. Zool. B<>t. Ges.. 186(5, 671.

Pi/goHtoliin Loew, Ceiitur, vii, 28, 1866, (Preoc.)

Nicode-'i Jaeunicke, Neue £xot. Dipt. 47, 1867.
According to the researches of Prof Brauer, (Ueber die Gattung ^\
Isopogon, Loew, Wien. Ent. Zeit. i'., 5;{) it appears that the type of
Isopogon Loew (/. hrecirosfriit Meig. ) has terminal spurs on the front
tibiae, a fact which had not only been overlooked by previous authors,
but the absence was considered by both Loew and Schiner as a generic
character ! With the presence of this spur the genus presents strong re-
lationship with Nicocles, and is by Brauer considered synonymous. This,
however, to me seems somewhat doubtful. /. brerirostris as Schiner
describes it, differs too much in the structure of the hind legs, viz : " Die
Hinterschienen sind an der Wurzel schmal, werden aber plbtzlich breit
und plump, und verschmalern sich wieder gegen die spitze zu; die hinteren
Metatarsen des Msinnch^'ns sind raessersjrtig zusamuiengedriickt, viel
langer als die Schieneii, fast funfmal so lang als die iibrigen Glieder
zusammen, bei dem Weibchen von gewohnlicher Bildung, etwji.s ver-
dickt" (Faana Austr. i, 131). This peculiar structure of the male tarsi
was the character upon which Lejttarthrm of Stephens was based, the
typical species of which was the same. In five species of Nicocles known
to me, the structural characters are all uniform, the hind tibiae are thick-
ened at the extremity (similar to Jfolopogon), the hind tarsi are much
thickened, but are alike in both sexes, the metatarsi scarcely more than
a fourth of the length of the hind tibiae. Moreover, in the structui of
the male abdomen and in the peculiar silvery markings .so constant in all
the species, NirocfcH^ seenis to show a sufficiently important difterence.

AMEniCAN niPTERA.

17

Neither am I fully persuaded of the synononiy of Aphamartnnm
\ Sehiner, which generic name Prof. Brauer would adopt in preference to
fUopoffOH or IjeptarfhruH to include the American species of Xicocle».
iJbig genus was described in ISfifi (Die Wiedemannsche Asilidcn, Verh.
jl. Bot. Ges. lfl56, G71) and the typical species from Venezuela, (A.
^f^auen/ehlti Sch.) the following year (ibid 1867, 372). In regard to
IJkutfp. poUtu» Say, Sehiner says (ibid 1867, 272): "Gehiirt in die
HHttung Aphamartatit'a, obwohl die Habitus, eine etwtis abweichende
tilt." In his generic and specific descriptions of A. FmvenfeMn %
r he says: "Von gedrungenem Korperbau, kurz und plump." "Hin-
r terleib kurz und breit, etwas cingebogen.'' "Geuitalien des Milnnchens
dick kolbig, die klappen gcgen die JBauch gerichtet.'' "Stark verdickten
Hirtorschenkel." Moreover he does not mention the peculiar silvery
Mppearanee on the last abdominal segments, which is, I think. ju!!tiy
t'lititled to generic value. In these points, the difference of which may be
m'l'Ji hy comparison of the following description, the two genera are suf-
ficiently separated, it seems to me, to warrant the retention of Xleodex,
for the present at least. Wherein Blncodr» differs fn»m Aphntntirtnina,
however, I am not prepared to say. I by no means affirm that these
genera are firmly established, but before settling their value a careful
"fonipurison is needed of more species. Material for this I endeavor t<»
add by the description of two aberrant forms, both of which show dif-
ferences that might be considered of generic value, but there have been
altogether too many genera made in this family already.

-'. Xicocles abdoininalis n. i^p. Piute I, figs. 14. I4h. I4Ij.

^.— Blufk, iiKxlerately i<hining. third, fuiirth, fifth and sixth ii>j<Ioiniiii)l seg-

^iiieiits. except the narrow hiterul margins, yellowish red: liftli segment alxnit four

times broader than lo ig. Wings variegated with dark brown. Length 1 1-12 mm.

Huad inueii broader than high, mutdi tiattened, the faoe scarcely more than
<mo-f(>nrtii the entire width, tiie inner margins of the eyes nearly parallel
'hroiighotit. Face flattened, but very slightly projecting in profile below, black,
•"•inewhal shining, whitish dusted below, a row of brown bristles along the oral
iimrgin. intermixed with sparse, long whitish pile, wliich extends upon the fa(>e
•lenrly to the antennae. Front more opaque black: the bristles on the ocellar
luliercb- brown or blackisli. Antetinae black, the first two joints with blackish
liiiirs: first joint a little longer than tiie second, the latter short ; third joint nearly
twice as long as the first two combined, slender, «>f nearly equal width throughout ;
»t_vl»> divergent, rather slender, acuminate, less than half as long as the thir<l
joint, terminating in a microscopic bristle. Oecipito-orbiti.l bristles brown . pile
'••'low soft, white, ratlier long und abundant. J)orsum of thorax black, with two
''•'"iid, velvety opaque black stri|K's. narrowly separated by a slightly grayish
•Iript' ill front. I'liiifluent behind: the ratht;r short and weak bristles above the
'*in<;. ill front of. and on the s<-utelliim. <lark brown. Pleiime thickly gray jmbes-

rtlANS. AHKIl. K.NT. »0«;. XI.

(i)

IIKCKMBKK, ISSr,.

18

S. W. WlLI.rSTON. M. f>.

cent. Alxlonien : firMt two segments sliining; bluck : third uiul fourth bright yel>
lowish re<I. very narrowly hiack along the lateral mnrgins; fifth anci sixth of the
same color, but more broadly black on the sides, brilliant silvery when viewed
from in front, less intense and finally not apparent when seen from behind. The
first three segments are parallel on the sides, of nearly the same width as the^
thorax ; from the beginning of the fourth to the tip of the fifth the sides ar»|
nearly straight, b'lt divergent, so that at the tip the abdomen is fully a fourth '
wider; sixth segment convex behind. The abdomen is bare, except the sparse,^
very short, re<;umbent luiirs, very much flattened, especially at the tip, the sixth
segment projects eave-like much beyond the hypopygium, which is small and
retracted. Legs rather slender, the tibiue and tarsi apinose, but not strongly so;
hind femora slender, elongate, a little thickened just before the tip; hind tibiae
elongate, slender on the basal two-thirds, much thickened, club-like at the end;
hind tarsi much thickened, especially the first joint, which in length is little lest
than the three following U)gether. In color the legs are deep pitchy black, on the
under side of the femora, and sometimes the tibiae aUo deep red ; bristles and pile
mostly white. Wing? elongiite.'all the posterior cells open; blackish, the third,
fourth and fifth posterior cells chiefly, the anal cell wholly, the basal cells in part,
the costal cell except the tip. and slender spots along thei veins opposite the distal 1
part of first vein, hyaline.

Two specimens, Calirornia (O. T. Baron).

28. Nicovles rufklM n. sp. Plate I, fig. 15.

9. — Yellowish red; the seomd segment of abdomen with a small semioval
black spr>t at base. Wings hyali.ne on basal third, on distal part variegated with
brown. Length 10-11 mm.

Face dark red, slightly shining, on the sides and upper angles and on the lower
part with yellow pubescence; bristles like the face, yellowish on outer part; pile
short, very sparse. Antennae yellowish red, the basal joints a little darker ; first
joint scarcely at all longer than the second, style comparatively longer than in the
preceding, nearly half as long as the tliinl joint. Fnmt opaque. Dorsum of |
thorax opaque lirownish red, on each side of the mitidle in front a small s{K>t, and M
back of the suture above the wings a larger spot of a darker, more reddish brown
color: in front of the scutelluni in the middle, a small, oval, shining space, on
either side of which the (lolor is golden yellow; along the suture on each side a
slender, yellowish gray stripe. Pleurae thickly reddish yellf>w and grayish
pubescent. Abdomen shining red ; the second segment at the base with a narrow,
transverse, semioval, shining black spot; on the anterior and }>osterior angles of r]
the second segment with a small, on the posterior angles of the third and fourth 'i
with smaller silvery spots; the fifth ^iegnient on the side with a large triangle,
narrowlv separated from the one of the opi>osite side, and the sixth and seventh
segments wholly opaque yellowish. In shape the abdomen has (mrallel sides to
the tip of the second segment, thence wiilens to the tip of the fourth, thance on
the sides more rapi«lly convergent. Legs wholly red, the coxae yellowish opaque, '^
the bristles light colored. Wings a little broader than in abdominalU, the anterior
cross-vein near middle of discalcell; on basal third (except extreme base) hyaline,
beyond variegated with brown, darker across the middle, the crross-veins and along
the veins at tip.

One spet'iinen, Wa-sliinirton Territory.

AMERICAN T)I»»TKRA.

11»

S9. T!VieoelMI ■eitulns n. sp. Plate II, figs. I, la.
^.— Wings hyaline with small brown spots; abdomen shining black with a

l- pollinose spot on the posterior angles of segments 1-5; posterior tibiae scarcely
Ihickenetl ut the tip. Length &i mm.

Black. Head and antennae black ; face rather thickly whitish pubescent with
•parse, obscure, yeWowish pile, black on the oral margin. Third joint of antennae
A little broader at its base. Front more shining, a little yellowish pollinose. Lat-

p tml orbits white pollinose; beard white. Dorsum of thorax and scutellum but
little shifting, rather thickly brownish pollinose, with two linear median indistinot

Ipt itripes; on each in front a whitish pollinose spot, and more exteriorly in front of
the wings a larger, more yellowish spot. Pleurae, coxae and sides of metanotuni
thickly whitish pollinose; disk of metanotuni shining. Abdomen bare, smooth,
•hining. bluish black, in structure and markings like Nicocles; broadest at tip of
fourth segment; on the posterior angles of th« first segment with a small whitish
pollinose spot, which becomes successively a nttle larger on the second, third and
fourth segments, but smaller on the fifth. Legs black ; thinly whitish pilose and
with light colored bristles; hind legs only a little elongate, of epual thickness
tliroiigliout; the tibiae not thickened ut the tip, but grailiiiilly, and only moder-
■tcly so, from the base: the titrs", only slightly thickeneil. Wings not elongate,
fourth posterior cell wide open; hyaline, at distal ends of the first and second
Imsal and discal cells, and base of the subinarginal cells with small browt ish
clouds.

One speciiuen, Washitio:tttii Territory (H. K. Morrison).
This specie^ will re(|uire tlie male to determine its correct place. I
(Itmht that it is a XicocfeH. The winjjp are like TaractiruK, the hind lejrs
lire shorter, stouter and not clubbed, the tarsi but slijjjhtly thickened ; the
abdomen is <juite smtxith, 'M in Xiroc/is. With 7'. hnriconiis it forms a
(itiuieetion between TaracficiiH, Jilacotlt-H and Xt'rocfcH, and they both
ini«,'lit perhaps be better placed under B/acoiffs. which then would b»'
(iistiniruished tr<»m Tttrncft'rux by the presence of si terminal style, and
froJii Xirorles by the structure of the male abdomen, should tliis spe(;ies
he foiiinl not to posses the silvery markinirs as I suspect.

In his Western J)iptera, pajre 2'Jl. Baron Osten Sacken referred a new
s|M!cies to the irenus ('/<iruf«>r J'hillipi, described from Chili, but with a
doubt insisumch as Phillipi does not mention in his description the pres-
ence of tibial spurs. The type species ( ('. imntfi/ienitis Ph. i, however,
has been since shown not to possess this spur by the able dipteroloirist of
'Smth America, Dr. K. Lynch Arribalzajra. who confirms the view pre-
viously taken of it by Gerstaecker (Kntom. Ber. 18ll5, !H) and lli^) and
«*^chiner. that it is synonymous with Ihjitfiotvtf Lw.* The prasent <;enus.
hence, appears to be new, and [ would propose lor it the nanui Ijt'stnmijin.

■■<!atu|o^o lie los Dipleros liasta ahora descritos que se eiicuentroneii las Uepub-
li'-iis.lcl Hioili' la Plata, ^^epiirat;!. 2".t—lHSL'.

20

S. W. WILLISTON, M. I».

And yet, so nearly allied does the fij^re of Phillip' show his species to j
he to Hahiifoniim that it Keenis very much of a question whether the
tibial Hpur is a sufficient <;eneric character, as is consi(!ered. Thia char-
acter, tojrether with the closure or non-closure of the marginal cell, are
excellent us aids to the artificial determination of the genera in thit^
family, but I believe that future researches will greatly les^n their rigid
application, and may throw together species with or without tiie tibial
spurs, such as Dloctrin. and TarantiniH, (hltnn'ciiK and Daat/pogon, and
llypenetes and Le»tnni>/ia.

I emend the generic characters, given at full length by Baron Osten
Sacken (I. c. 292), so as to include a closely allied new species described
below.

Front tibiae with a terminal curved spur. Head .similar to that of
<\i/rtoitoyu)i^ but smaller and narrower (narrower, also, than that of C
pmu-fipenittx itn figured by Phillipi, 1. c. pi. xxvii, fig. 29); mouth larger
and more oblique; sides of face only a little diverging below, gibbose,
the pilt; or hairs in the middle of the gibbcsity, not reaching the antennae
or eyes. First joint of antennae subcylindrical, short, the second yet
shorter, the third longer than the first two taken together, narrow at the
base and then expanded to twice or three times as wide, gently narrowed
and then rounded at the tip ; at the end a minute cylindrical style, end-
ing in a microscopic bristle. Ocellnr tubercle, dorsum of thorax and
edge of scutellum with stout bristles. Abdomen subcylindrical, narrow,
somewhat broader at the base, male hypopygium not stouter than the
abdomen ; female ovipositor with a star of sh«)rt spines. Legs nither
strong; tibiae and tarsi spinous; I'ront and middle femora with a single
spine on the hind side a short distance before the tip. Ungues and pul-
villi long. Wings like those of Ct/rfopof/on ; anal cell very little open,
.sometimes closed; anterior cro.s.s-vein about the middle of the discal cell;
s.'coiid submarginal cell considerably longer than the second posterior.
All the p(»sterior cells open, the fourth soiuetinies coiirctate or nearly
i-losed. Type L. sahiihniniii (). 8.

:;o. I^estoinjia Mabnlonuiii. Plate II. fig. 4.

nawUof mbit/oniiin (J^teii -Sacken, Wei't. Dipt. ."ttl.

% 9' — Motitli oMiqiie : tliu unteiiiiue situatetl juitlway ItetwtMiri llie ocelli and
iirul iiiaririn, first Joint hut little longer Chan the rjei-otui, third Joint narrow for a
full fourth of itA length, and then wiilened rapidly to ahout three times ua \vi<iea»
at ha8e. AI>doinen yellowi:«h gray with whitish reflections: u hlack spot nut
reaching the posterior margin in the middle of each segment, a sintilar dark spot
on each side of segments two. three, four ai d five. Legs hlack, femora at the tip,
and hiise of tihiae narrowly re«i. Length 7-11 mm.

AMERICAN MPTERA.

21

Six tbniules ami tour males from Kern Co., California Til. K. Morrison),
I ri'fer unhesitatingly to this 8peci(!s. None of them have, however,
§ny red at base of the f|mora, but one from Northern California has,
the base of femora and tip of tibiae red. The color of the bristKs
vary much, as they often do in this family.' In none of my females
•ro there any black bristles above the border of the mouth. In
eTcry female I find on the under side of the second joint of the an-
tonnoe two black bristles which are '•>«"! strong, and white in the male.
There are eight strong bristles on the females' ocellar tubercle, in five
■pocimens wholly black, in two partly whitish \ in all the males ihey are
Ititis strung and whitish. In all my specimens, both male and female, the
fuii-.shupc fringe of hairs in front of the haltercs is white. In four of
the specimens there are six bristles on the edge of the scutellum; in three
tlioro are eight, in two ten, so that the number is not of specific value.
Tlio spines on the tibiae of the male are white, in the female mostly
wliiiish, but in part black. My specimens are all larger (!)-ll ir.m.)
than the ones described by Baron Osten Sacken, (7-7 i nun,) neverthe-
less I believe the species is the same.

•ti. LeMtomyia IVaudiger n. sp. Plate II, fig. 5.

^.— Head beliiw only gently oblique; face distinctly longer than the front from
•x'uliiir tuheicle to antennae, loss gibboae on the lower part ; third joint of antennae
eloiijjate, less distinctly clavato, gradually widened from near the base, not three
limes as wi<le on its widest portion. Abdomen uniformly covered with whitish
Riiiy piibesi-ence. leaving a row of small lateral black spots on segments 3-fi. Legs
rv<l with broad black rings on femora and tibiae. Length 10 mm.

firay. F;ice and front whitish, the mystax, pile on the inner sides of the front
near the eyes and the bristles of the ooellar tubercle all nearly white, a single
Muck bristle on the second joint of the nnfennac. Antennae black, the first joint
Hoiiu'what yellowish at the base, the third joint logins to widen from very near
its tdisc, the under surface is nearly straight, the upper side gently convex, except
near the l)ase, the tip obtuse. Beard long and abundant, o« cipito-orbital bristles
chielly yellowish. Dorsuni of thorax yellowish gray with four brownish stripes,
the initldlo ones narrowly separated, the lateral ones consisting of twi. oval spots,
the one before, the other behind the suture; there are four rows of ra. her stout
'>lack bristles nearly equidistant from each other, the lateral ones more ir. "gular.
''^••utcllum in the single specimen with four bla4'k bristles. Pleurae wholly j-urely
Krayish,the fan-like row of hairs in front of the haltercs yellowish white. A. do-
incn w)iolly,antl nearly uniformly whitish graj' ; on each side of the third, fourth,
fiftli and sixth segments near the front a small circular shining Mack spot; pile oT
the hy|H)pygium yellowish while. Coxae and l.>gs red ; front femora with a snjall
''iiig. middle with a broader, and hind pair except the base and tip, tibiae except
the broad base tip of hind pair broadly, and middle pair narrowly black: spines
•>f the lejrs white, of the tarsi chielly black. Wings as in .labulonum, hyaline.

<hi(' .specimen, Mendocino Co., California (O. T. Haron).

•>•>

S. W. WILLISTON. M. I».

TARACTICUN.

LiK»w, C«Mjtiir. v.il. ii, 240, 1S72.

The Hpurs in this genus uro very ^«uluII, und were evidently overlooked
by Schiner when he pliiced tlie typical species under Dioctria. It does
not seem to me probable that Ceraturgum nigcr Macquart can belohg here.

.t2. TwraetlcuB oetopancliktua. Plate II, tigs. 2, 2a.

Dioctria H-punctata Say, J. Acnd. Phil, ill, 49; Compl. Wr. ii, ft3; Wiede-
mann Au!*8. Zw. IiiH. 't,MJ.; Schiner. Vcrh. Zoo], Iktt. Ges. 186A. 675; ihid
1887. .".flQ.
TarcKticun octopunrtatun Loew, Centur. V(»I. ii, 240; O. Sacken Cat. Dipt.

9. — Face ("onsidcrably longer than wide; antennae diatinetly longer than the
liight of the head, firrit joint uhout. once and a half the length of the second, third
joint more than twice the length of the first two together, slender, obtuse, the style
hardly distinsjuishahly diHerentiated, on the upper surface a small bristle a little
beyond the middle. Dorsum of thorax with three yellowish lines, the middle one
straight. Abdomen shining black, with a small silvery spot on the posterior angles
of the set'ond, third, fourth and fifth segments. Legs red, tip of hind tibiae
broadly and of middle tibiae narrowly, and tips of all the tarsal joints blackish.
Length H mm.

:s.'t. TaracticuH brevlcornis n. sp. Plate II, fig. 3.

^ 9 • — Antennae short, aljout as long as the distance from iiutennae to oral
margin ; style distinct, acute, terminating in a microscopic bristle ; legs brownish
red, blackish toward the tips of tarsi ; abflomen shining black, with a, white spot
on the posterior angles of the secr^nd, third, fourth and fifth segments. Length
7-9 milk.

Front and face silvery white, the bristles on the oral margin, (M>elli, and the
finer ones along the lateral margins of the front, black. Face broa<ier than in
octopiinctalua, being very nearly square, the distance from antennae to oral mar-
gin scarcely greater than thht between the eyes. Antennae black, the first two
joints with black bristles below ; short, not as long as the hightof the head, first
joint a little longer than the second, third joint slender, not more than twice tlic
length of tbe first two taken together; style rather slender, not as long as the
second antennal joint, terminating in a nucroscopic bristle. i>orsum of thorax
thickly covered with brownish ochraceous pollen, with two very indistinct darker,
browiiish median stripes in front. Pleurae gray pollinose. Abdomen of equal
width, gently convex alxtve, black, shining, lightly punctulate, the posterior
angles of the second, third, fourth and fifth segments with u small quadrate silvery
s|»ot, the narrow anterior margins of the same segments less distinctly whitish
silvery. Legs brownish reil, all the tarsi reddish brown, blackish at the tips.
Wings like those of T. octojiunclatua, nearly pure hyaline.

Two specinieiiM. Wat>hin<:ton Territory.

This specie.s is, I believe, a Tarocficiiis, )iltliou<rh it hits mnim of the
characters ot" BUtfoih',)s. In size and appeaniuce it is strikino-ly like T.
ucfoffunctatiitt, and with the exception of the hesid. the structure is almost
preci.sely the same, and the coloration nearly so. The head and antennae,
liowever. :i)tpei»r to be those of Jifarof/es or Nirorh-n. The small cross-

AMERlr.VN niPTERA.

L'.'J

reiii!* of the wing in one specimen in nearer the end ut' the di^ical cell, :ls
it is in Iilacnde.»; unturtunateli^in the other specimen it is near the
niildlo, as in T. octofmnctatmi. The only characters that I can under-
lUnd for Blttco*le» now, are : Abdomen smooth, not clavate, thorax a
fittle more gibbose, third joint of antennae perhaps more fusiform, fourth
posterior cell of the win<^ nearly closed, and the wintr* with dark markings.

SAROPOOON.

'M. Saropogon eombnstns.

S.eombuitlua Loew, Berl. Ent. Zeit. 1874, 373.

"(.—Black, the feet and wings of the same color; head and donuiii of thorux
thickly dilutely liiteoua pollinose, pleurae fuscous poUinose; mystax whitish, front
and dorsum of the thorax with pallid yellowish pile, remainder of the body black
pilose, except on the tibiae chiefly, and on the tarsi wholly pallidly pilose. Length
m mm. Texas."

Tlireo specimens from Western Kansas agree throughout with Dr.
Lk'w'.s description ; the tip of the second joint of the unteniiae is dis-
tinctly yellowish ; in two specimens the fourth posterior cell is closed a
little distance before the border of the wing.

36. Nnropoicon adnstus.

S. aduMtuH Loevf I. c. ^7b, " J.— Black, head and thorux very thickly luteu-
polliiKise, the posterior part of each abdominal segment broadly ri-d, the first five
oil the posterior angles with thick dilutely lutescent pollen ; antennae and feet red,
the femora near the tip black ; wings hyaline, the tip broadly blackish. Texas.''

Two female and one male specimens from Western Kansa.s (E. W.
Guild) are undoubtedly this, but the S|)ecie8 is evidently variable in col-
oration. In all my specimens the legs are wholly reddish yellow, and
the uiitcniiae of one spccinjon lacks the black at the tip ftf the third joint.
In two specimens the ground color of the thorax is chiefly black, yellow-
i»h <mly on the front, sides and posterior part, in the third, a female, the
ground color is wholly light yellowish red, with the rather narrow and
ulihreviatod stripes of the thorax and a small spot above the middle coxae
hlack. In ull tin; abdomen is red, with a large triangular spot on the
lateral anterior parts of the third, fourth and fifth segments, scarcely
touching each other on the anterior b«trder, a smaller (»ne more broken
np into spots on the second segment, and a very small one on the anterior
«>ngU' of the .sixth, black.

DEROinYIA.

I'hillipi. .\iifzalihuig der Cliilenirtuhen Diptera, Verb. Zoi.l. But. ties. xv. TO.'i.

• Nt)5; V. d. Wulp, Tijds. voor Entf>rii. x.xv. Amerikuaii.'<che Diptera. 3. '.>!.'.
/>iogmUen Loew, Cenlur.

I'his genus, as Baron (Jsten Sacken first pointed out, is very closely
"llii'il to our species hitherto placed under IHoymltt'iit. A study of Phil-

24

8. W. WILLISTON, M. D.

lipi's figures and descriptions convinces me that v. d. Wulp is right in 1
rejecting Diogmitest. In Loew's very brief diagnosis of the genus hel
defined it as differing from Saropogon in the fourth posterior cell"
being closed, the head broader and more disciform, the abdomen and!
feet longer and more slender. He afterwards (Ber. Ent. Zeit. 1874,1
376) emended it as follows: "Mit Diogmites kann die Gattung Saro-
pogon nicht verwechselt werden, da der Kbrperbau der Diogmites ein
weniger gedrungcncr, namentlich der Hinterleib liinger und schlanker bt,
auch die vicrte Ilinterrandzclle vor, und zwar bci den nordamerikanischen
Arten verhaltnissmiissig weit vor dem Fliigelrande geschlossen, nicht wie
bei den Saropogon- Arten geoflFnet oder hiichstens am Fliigelrande '
seibst geschlossen ist, so dass in Folge davon die dritte Ilinterrandszelle
ein viel grusscre Broite als bei den Suropogon-AvtGn hat; es ist dies fiir
die Diogmiffs-Artun sehr character istisches Morkuial, durch welches sich
auch die siidamerikanischen Diogmtfrs-ATtcn au.s dem Verwaiidtschafts-
krei.se des Diogmitea Wied. auszeichnen, bei denen die vicrte Ilinter-
randszelle in geringerer Entfernung vom Flugelgerandc gesschlossen ist,
als bei den niir bekannten nordamerikanischen "

This difference, however, is sometimes very slight indeed ; in some speci-
mens of species of Saropogun and Diogmiffs, described by Loew himself,
it is absolutely null. The characters then, at present, are the more elon-
gate form, the more slender abdomen and legs, and the fourth posterior
cell being always closed and usually long petiolate. Dcroniyiti grticilut
Ph. (Tab. xxvi, fig. 29), is in structure and markings much like I).
minpJlm Lw. ; in his discription Phillipi speaks of the fourth posterior
cell as being closed; in some specimens of misffhiH the cell is closed only
just before the border of the wing.

^r>. Deromyia ral'escens (Macq.) v. d. Wulp, Tijdschr. v. Ent. xxv, 91.

Danypogon mfencenn Mueq. Hist. Nat. I>ij)t. i, 295, 8.

Diogmitea ru/escenn v. d. Wulp, Notes from tiro Leyden Miis. iv, 7fi, 5.
I do not know this species; Prof. v. d, Wulp thinks it diRijrent from
D. diincnlor. Maccjuart recorded it from Phihidelphia, but his specimens
may have come from the South-west. v. d. Wulp received it from
Arizona.

P.7. Deroinyia Winthemi. flMatc II, .ig. (i.)

Dnsi/pofjon Wintheini Wiodjuuiin, Dipt. Exol. i, 2'J.'{, 17; Auss. Zwei.
Ina. i, 3S7, .■{2.— (South America.)

.' angufitivcnlris Macqiiart, Dipt. Exot. I Suppl. 0,'); Tub. vi. fii?. 9.

(Without locality.)
Diogmites misellun Loew, (^ontur. vii, .'59.
Dcromyia Winthemi v. d. Wulp. Tijds. v. Ent. xxv, 93.

AMERICAN niPTERA.

25

This species agrees with Wie'' 3iuanD's description very well, but the
wnonomy rests upon i#)re direct evidence. Specimens in Prof. v. d.
Wulp's collection without locality were compared by Prof. Mik with the

I typical specimens in the Vienna Museum, and specimens that I com-
nuniciitcd to v. d. Wulp, he writes me are D. Winthemi Wicd. I have

^ ipeciraens from Indiana and Kansas that show no diiference from a num-
ber of individuals that T captured in an open field in June near New
Haven.

18. Deromyla discolor.

Diogmitea discolor Loew, Centur. vii, .37. — Penna.

A single, somewhat rubbed specimen from Pennsylvania (S. Auxer)
agrees with Loew's description.

39. Deromyla ambrina.

DiogmittK umbrinus Loew, Centur. vii, 4.3.

Danypogon hasalin Walker, Dipt. Satuid. 95.

Uerenniua Walker, List, etc., ii, .3.39.

This species is rec;.rded from N. Y., Mivss., and 111. by Osten Sacken.
I have taken numerous specimens in Connecticut and havo it from Ver-
mont. The abdomen is nearly like that of Snmpngnn.

4A. Deromyla angnstlpennls.

Diogntites angnHtipennix Loew, Centur. vii, 41. Kansas, Mexico.
A single specimen from Kansas lias the legs lighter and the dorsal
thoracic stnpes darker than Loew describes, yet it is evidently this species.

41. Deromyla ternata.

Diogmilen ternatu.<i Loew, Centur. vii, .38. — Cuba, Florida.
A single specimen from Georgia is probably this, but from the varia-
bility of the species, I am in doubt.

Specien Ineertne sedis.

*'i- Laparus ?plctitarslN Bigot, Annates des Soc. Ent. dc Frar ;e 1878,
p. 417.
If niy determination is correct this is not a Laparvs nor does it even
Mong in this division of the Dnnypogonhwe. My specimen agrees
throughout with Bigot's description, except that the femora are black ;
the "t'poron n pen pnn droit at noir," in my specimen is only a stout
hliit'k spinel I cannot at prr-sent place this species. The head and
wings are like Qiffiniciis, but the abdomen is shorter, of equal width
n»<l cyliiKlrical, and very different in general appearance.

DASYLIilS.

4:<. Dasyllis llavicolllH Say, Longs Exi>ed. App. 374, 2 ; Compl. Wr. 1, 265.
{Laphria.)

TRANS. AMER. ENT. 8O0. XI. (7) DKCKMBEK, 1883.

26

S. W. WILLISTON, M. H.

Throe specimens from Connecticut ajiree perfectly with Say's descrip.
tion. Its small size, yellow pile of head, thorax and scutellum; the rather
broad third joint of the antennae, and very short second joint will enable,
it to be distiniruished without difficulty. Length 1 1-15 ram.

44. DasylliM terglsSH Say, J. Acad. Phil, iii, 74, 6; Cuiiipl. Wr. ii, fl7.
(Laphria.)— 11 oAd, thorax, a broad banil on 2-4 ahdominal se^tiv nts, anterior^
coxae and tibiae yellow pilose. Lei:gth 18-25 mm. >,j

Four specimens from Connecticut arc typical. Another hsis but very
little yellow pile on the legs and abdomen ; two more very U^-^i^ speci-
mens have the abdomon wholly black, and but a few j-ellow hairs on
the legs.

45. Dasyllis thoraci«a Fab.; Wied., Aus?. Zw. i, 511,21 (Laphri'D.—U^'iA,
scutellum, abdomen and I eq;^ black pilose; thorax yellow pilose. Length IS-2()mm.

Eight specimens, Connecticut, Penna.

4ff. Dasyllis Ullicolor n. sp. — ^ .— Black shining, everywhere yellow pilose,
rather more fulvwiis on the timrax. Wings tinged with brown, hyaline on basal
portion. Length 19 mm.

One specimen, Washington Territory.

Tliere is but little to add to this diagnosis. I do not perceive a black
hair or bristle anywhere. In size and shape it does rot differ from
specimens of astur.

47. Dasyllis sacrator Walker, List, etc., ii, 382.

Thorax, basal portion of the abdomen, and legs in largo part, yellow
pilose. It will be confounded with trrghsa only. It is smali(!r ; the
beard wholly, the hair on the face wholly or in largo part black. The
wings are not usually ai dark colored. The species varies consid-
erably. I have ten specimens taken near the biise of Mt. Washington
(July 25-30). The color of the hair in some is fulvous, in others light

yellow, that on the face in some specimens is largely intermixed with
yellow. In most of the specimens there is considerable yellow hair on
the hind legs, but in others it is wanting. The light colored hair of the
abdomen is usually confined to the second and third segments, in some it
extends into the fourth and fifth, and in others It is confined to a small
spot on the side of tli-; second segment, or may be wholly wanting.
Such specimens may not be easily distinguished from fhoniricn ; in all
my specimens of the hitter the body is more robust, the black abdominal
pile is longer and more abundant, and the hair of the legs has rarely any
intermixture of yellow.

48. Dasyllis posticata Say, Long's Expud. App. 374, 1 ; Compl. Wr. i, 255
{Laphria). — Head, thorax, and before the ti{) of abdomen yellow pilose.

V>">1

AMERICAN DIPTEKA.

27

I have but a Hinjile castciW specimen of this specie-*, in which the
tibiae have no yellow pile.

49. DasylliA astur O. Sacken, West. Dipt. 2>i5.

I have twontv specimens from California, Washinjrton 'I'erritory and
Oregon. They ^;iry much and the species is doubtfully distinct from
the foregoing : tear specimens have the legs wholly black pilose, and with

'exception of the pile of the front being in part or wholly yellow, are
f typical pnsticatae_ in appearance. All the rest have, liowever, more or

I less yellow pile on the front legs and coxae, and sometimes a le.s«er quan-
tity on the middle tibiae. The yellow pile near the tip of the abdomen

■ TMies in extent ; it usually extends over three segments ; in some, how-
ever, only on one. As Baron Osten Sacken remarks, I find the pile of
the head and pleurae variable. Two male and female specimens from
Western Kansas have the four front legs thickly yellow pilose, and the
yellow on the abdomen e.'?tending on the sides quite to the base.

50. Dusyllist COlnnibica Walker, Osten Saekcn, West. Dipt. 2.S5.

Kiglit specimens from Oregon and Wtishington Territory I recognize
as this. The species is more slender, and less thickly pilose than the
preceding, especially on the thorax where the pile is shorter. Across the
dorsum it is more or less black ; on the posterior part longer, thicker and
*»mctimes orange colored, or reddish. The hind tibiae a.s well as the
front and middle pairs Iwive yellow pile.

HVPERFCIIIA.

Schiner, Verh. Zool. Bot. Ges. 1«, fi7S (ISfifi).
A single specimen from Pennsylvania, that ha.s been in my coll«>ction
for several years, I have not been able to identify with any described
Hpecios. [n size and appearance it resembles Das^lfi's ffrc/infia, but offers
Very distinct generic differences. From a study of Schiner's deliiiition of
",'/l"i'n;liia, and also of the type species, Laplin'n .ctjlocoinfnrmh Walk.,
It Hcenis probable that it belongs to that genus, and yet it may have <liffer-
feroiiccs that Schiner dfies not mention ; I therefore give its structural
characters :

Very large, robust, black; densely pilose. Head broade. than in
f^iii'ij/fiH, considerably broader than high. The inner borders of tne eyes
nearly parallel. Face gibbo.«ie btrlow, but even, convex from the
•ntennae to the mouth, the convexity being greater below, densely cov-
ered with long hair Antennae short, slender, not as long as the face,
"v^'ond joini only a little shorter than the first, cyliiulrical and more
'•'♦•nder ; third joint sleniler, a little broader at the base, scarcely longer
'•'ail till! firsf two together, terminating in a small but very di.-tinct

28

8. W. WILLI8T0N, M. P.

cylindrical stylr at the tip of which there is a miDute bristle. Proboscis
short, thick, obtuse; palpi strongly clubbed, densely hairy. Thorax
large, broad, only gently convex above, thickly pilose, as in Dasyllis
Abdomen short, not twice the length of the thorax, very broad, depressed,
gently convex above, broadest at the base, the sides thence gently con>
vergent to the tip of seventh segment, which is very broad, the abdomen
thus appearing nearly truncate. Legs short, stout, the front and especially
the middle femora thickened, the hind pair only a little elongated, less
thickened, cylindrical, of nearly equal thickness throughout (a very little
thicker on the projiiimal half), not clubbed as in Dnsyllis ; hind tibiae
thickened and arcuate. Pulvilli small, narrow. Anterior cross-vein of
wings a little before the base of the fourth posterior cell and very near
the base of the discal cell ; the first posterior cell hence very long, very
narrow and closed a little before the tip. Anterior braich of the third
vein strongly curved forward, so as to meet the costa only a little beyond
the tip of the first vein. Fourth posterior cell closed a little before
the border ; anal cell acute, closed a considerable distance before the border.
The type of Hypcrechin is Lnphria xylo&tpiformi^ Walker, (List, etc.,
ii, 385} from British India, and so far as I am aware but two other
species are known, vit : H. (^Lapjiria) robusta (Wied. ) v. d. Wulp, whose
habitat is unknown, and H. fern v. d. Wulp, from Borneo.

61. Hypereehia atrox n. sp. (Platu II, figs. 7, 7a, 7b.)

9. — Very large, robust, black, densely clothed with black and yellow hair,
ilair of the face long, dense, brownish black ; on the first two joints of the anten-
nae in large part yellow. Hair of the front chietly yellow, intermixed with black ;
the hair of the occiput dense, but not very long, together with that of the palpi
deep black. Dorsum of thorax with thick, light yellow pile, longer and more
abundant on the posterior part and on the scutellum. Pile of pieurae black; in
front of the halteres a very conspicuous and dense tuft of long yellow pile. Abdo-
men thickly clothed with erect, rather short blai-k pile; longer, bushy, and yellow
on the sides of the second segment just behind the halteres. Legs with black pile ;
on the front, hind, and more especially the middle coxae, the middle femora behind
and the hind femora in front, longer and yellow. Tibiae and tarsi reddish black.
Wings nearly hyaline, with a strong yellowish tinge in front. Length 22 mm.;
of wing 18 mm. Width of abdomen at second segment S mm.; at tip bk mm.
One specimen, Penna., (S. Auxer).

I^PIIRIA.

:«2. Ijaphria gilva.

AkUus gilvuH Linn^. Fauna Suce. 1912.

rufuH de Geer, Ins. vi, 241, 4; pi. 13, f. Id.

Laphria gilva Loew, Linn. En». ii, 548, 8; Schiner Fauna Austr. I, 139;
Ferris, Annales Soc. Ent. France (4), 212, pi. 3, fig. 89, 9« (Parasitic on
Spondyli^ and Criorephalus larvne): v. d. Wulp, Amerikjianscho Diptera,
Tijds. voor Entom. xxv, 104.

M

'at..

^1

AMERIC^ DIPTERA.

29

" Een $ uit do otnstreken van Quebec, in het Brusselsohe innseum
aanwezig, gelijkt zoo volkonien op deze Europesche soort, dat ik het
gcrust als zoodanig dr.rf determineren " (v. d. Wulp, 1. c.)- I have
before nie a specimen from Canada (J. B. Caulfield) that agreos very well
with the description of Schiner's.

63. Laphria ¥ulbur Osteu Sacken, West. Dipt. 2H(i.

Ten specimens from Washington Territory, Oregon and California I
identify with this, but, in all my specimens, the dorsum of the thorax
across the middle is clothed with short black pile.

M. Laphria anthrax n. sp.

9.— Black; head, thorax, legs, and first two segments of the abdomen wholly
blaok pilose; remainder of the abdomen, except the extreme tip, densely clothed
with close-lying bright yellowish-red pile. Wings blackish. Length 21 min.

The pile of the face is abundiint, on the lower part composed mostly of bristles.
Dorsum of thorax shining, wholly covered with short black pile, except the short
bliick bristles above the wintr. The third — seventh segments of the abdomen are
wholly concealed beiieath bright orange-red pile ; the pile lies very closely and
thickly. Tip of abdomen and venter black pilose. Legs wholly black pilose.
Wings dark brownish or blackish; the anal and second basal cells in large part
hyaline; the middle of the fourth and fifth posterior cells lighter.

One specimen, Northern California (0. T. Baron).

This species must resemble L. nipnx O. S., and it is possible it may
be the other sex, but the fiifirp lack of white pile renders such a view
improbable.

&5. liaphria ftero.v n. sp.

9.— Black ; facial gihl)osity, thorax except the posterior part of the dnrsum, tip
of abdomen and legs, black pilose ; face on the side above, beanl, and posterior part
of dorsum with reddish yellow pile. Length IS-20 mm.

First joint of antennae rather short, thick, the second distinctly more than half
UH long, both clothed v/ith black hairs. Facial gibbosity thickly covered with long
bluck bristles and finer black hairs, separated by a distinct interval from another
*nfi of black hairs just below the antennae; on each side of the lace abovi with
■hort, close-lying, brigiit yellow pile. Pile of the occiput below yellow, above
piiriiy black. Dorsum of thorax nearly opaque brownish black ; on the inner side
nt the humeri a large yellowish grayish pollinose spot; pile of dorsum erect, not
very aliundant nor long, black, p little lighter colored in front ; on the posterior part
«nd on the scutellum longer, yellow. Pleurae thickly grayish pollinose, pile sparse;
"le long, fan-like row in front of the halteres, black ; abdomen shining black,
rather thickly clothed with reddish pile, thicker on tlie posterior and mid-
dle parts of the segments, a large spot on the sides in front, more shining,
•ometimes with short obscure pile. The outline of the pile on each segment is
•B'Tc apparent when viewed directly from above; when seen from behind more
changeable, and the ground color everywhere visible. Front and middle coxae
*'"» yellow pile; legs wholly black pilose; the front tibiae and tarsi on the irner
«ide thickly yellow pubescent; hind tarsi somewhat red<li8h. Wings lirownish on
'he outer part, hyaline toward the base.

(8)

30

8. W. WILLI8TON, M. D.

Two specimens, Washington Territory (H. K. Morrison).
One of the specimens has on the inner side of the front femora some
whitish pile.

5ff. Ijaphria viTax n. ap.

^. — Black, shining; pile of the face, front, beard, humeri, scutellum, pleurae,
posterior angles of the abdominal segments, coxae, front and middle tibiae light
yellow. Length 22 mm.

Face thickly clothed with light yellow pile, on the lower angles black ; protrud-
ing through the yellow pile a number of black bristles. The first two joints
of the antennae with black pile; the uecond joint scarcely half as long as the
first. Beard and pile of the proboscis light yellow ; on the upper part of the oc-
ciput, and the bristles of the ocelli, black. Dorsum of thorax with a distinct blue
reflection, clothed with short black pile, longer behind; in the front, the post alar
callosities and a thin row in front of the scutellum light yellow. Scutellum with
yellow pile and yellow and black bristles along its border. Pleurae with a tuft of
yellow pile in front of the root of the wings; the fun-like row of hairs in front of
the halteres light yellow. Abdomen shining black, with very short black pile,
and longer dense light yellow pile as follows; the posterior angles of the third
segment and on the following segments, successively extending more inward along
the hind margin; on the seventh it forms a complete cross-band in front of the
hypopygium; on the sides of the second segment in front, reaching nearly across,
and suceeessively less on the following segments, with less dense, more erect yellow
pile; pile of the hypopygium black. Legs black pilose; the front and middle
tibiae on their outer side with yellow pile, a trace of which is found on the hind
tibiae. Wings nearly hyaline toward the base, lightly clouded with brownish on
outer part.

One specimen, Washington Territory, (H. K. Morrison).

57. liaphria billneata Walker, List, etc., ii.

% 9 • — Black ; black pilose ; posterior occiput oelow, pleurae, legs and side* of
abdomen with long silky white pile; dorsum of thorax but little shLaing, in front
with three darker opaque stripes, the middle one more or less obsolete ; 3-7 seg-
ments of abdomen, except the sides, yellowish-red, with similar colored pile ; facial
gibbosity large. Length 15-20 mm.

Facial gibbosity large, globose ; pile and bristles of the head wholly black, ex-
cept on the occiput below, where it is long, abundant and silky white. Dorsum of
thorax nearly opaque, with two rather distinct, narrow, median, more opaque
brown stripes; obsolete posteriorly, l>etween them there is a third, more obsolete,
but of which the anterior end is usually quite apparent. Pile of dorsum rather
short, erect, not abundant, black. Pleurae grayish poUinose, with sparse, silky
white pile; the fan-like row of hairs in front of the halteres, black. Abdomen
black, moderately shining; a very large oval spot reaching from near the begin-
ning of the third segment to the tip or hypopygium, and broadly separated from
the lateral margins, yellowish-red, with appressed, similar coloreil pile. On the
black j>ortion the pile is black, short; on the sides in front long, silky white. Legs
black; the femora in large part, and more or less of the tibiae with silky white
pile. Wings brownish along the veins ; the inner parts of the cells and the base
of the wings more hyaline.

Ten specimens, N. California (O. T. Baron).

?S|.'^

AMERICAN DIPTERA.

31

58. Laphria francisrana Big. Ann. Sd^ Ent. Fr. 1878, 235.

^ 9. — Deep black, shining; face with black bristly hairs and yellowish white
or white pile ; dorsum of thorax pubescent, blue ; in the male with short light yel-
low, in the female wholly black, pile. Length 12-13 mm.

^.—Bristly hairs on the face black, in the middle of which there is some long
light colored pile, and on the sides above concealed beneath more oppressed yel-
lowish white or white pile; in the middle above, bare; front pollinose. The
iuA of hairs below the base of the antennae and on the first two joints black.
Third joint of antennae not much longer than the first two together. Front with
Unck hair, and black bristles on the ocellar tubercle ; occipito-orbital hair black;
pile of beard soft, white. Dorsum of thorax of a distinct opalescent I iish color,
the short, not abundant pile, light yellow, on the posterior part longer, black, the
4>ristles also black ; a spot lightly poUinose on the inner margins of the humeri.
Pleurae black, lightly whitish pollinose ; the ante-halteres bristles black. Abdo-
men deep shining bluish black, with very short black pile; on the sides of the
•eginciits, in front and behind, longer, light yellow, but still not conspicuous; the
briHties and hairs on the sides of second segment black, the hair sometimes
whitish. Legs deep black ; front and middle coxae, and the underside of the four
fri>iit femora near the base, with longer whitish pile; on the four front tibiae with
•liortcr, light yellow pile. Wings hyaline at the base, tinged with blackish beyond.

9.— The pile among the bristles on the facial gibbosity is wholly black, as is
•Iso that on the dorsum of the thorax; the posterior angles of the third, fourth
knd fifth abdominal segments have but little whitish pile; otherwise as in male.

Three males and one female from Washington Territory (H. K. Mor-
rinon), and two females from N. California (0. T. Baron).

to. Laphria eanis n. sp.

% 9 • — Deep shiiung black ; face with black bristly hairs and white pile ; dorsum
of thorax in both sexes with very short, sparse whitish pile, and in the male with
Ioniser, more sparse blnclr pil«, also. Length 10-11 mm.

Is closely allied to the preceding ; the T^hitt pile on the facial gibbosity
Is less in the male in quantity, and the dorsum of the thorax lacks the
chamcteristic yellow pile of the male, and the black pile in the female.
In both sexes the dorsum is clothed with very short white pile or, more
properly, pubescence, a little longer and more erect in the male ; in the
latter also there is moderately long, sparse, black pile, wanting in the
female. In the male the dorsum of the thorax is bluish opalescent,
Jjut in the female the blue is scarcely apparent. The pile of the
•bdomcn is longer, and on the sides near the base thicker and white.
On the tibiae also the white pile is longer and more conspicuous.

Two specimens, Conn., June 25.

^- Lnphria Xanthippe n. sp.

i 9 -—Black, shining, black pilose; third segment in part, remainde<*of the ab-
domen, and under sides of hind femora re<l. Length 12-15 mm.

Face black, in large part shining, on the sides near the eyes narrowly white
pollinose with a little silvery pile near the iiiystax below, elsewhere the pile and
•'fistles are wholly black. Third joint of antennae rather more than twice us long

32

8. W. WILLI8T0N, M. D.

09 the first two together. Dorsum of thorax nearly bare, with very short biack;
pile. Pleurae wholly bare, shining; the coxae liglitly pollinose. AtKlomen with^
very short black pile, the bristly hairs on the side of second segment not &bun-j
dant ; first two segments black, with a bluish reflection : the large part of th#l
third and the remainder of the abdomen red, except on the sides the black eztendsl
on the fourth, sometimes narrowly on the fifth. Legs black, with black pile; th«a
hind femora for the whole length, except the upper side, red ; on the inner sid*^
of the front tibiae and all the tarsi with golden pubescence. Wings brownishyi
hyaline toward the base.

One male and two females, Mt. Hood, Oregon (H. K. Morrison).

61. I<aphri« pabeseens n. sp.

^ 9- — Black, shining; legs, except the tarsi, red. Length 10-13 mm.
Face and front clad with black pile and hair, except a tuft of silver pile on eneh^
side of the fiice above the mystax. In the male the beanl wholly white, in the
females wholly or chi^ny black. Dorsum of thorax and ab<lomen shining, faintly
bluish black, clothed with golden pubescence, very noticeable when seen from in
front. Pleurae bare, sliining black; the coxae whitisli ptllinose. Front and mid-
dle cf)xae, and under sides of the feinora with wiiite pile; femora and tibiae
wholly red, bristles black; tarsi black with golden pubescence on the the under
side. Wings tinged with brown, less so toward the base.

Eight males and five females, Washington Territory and Mt. Hood,
Oregon, ( H. K. Morrison).

LAMPRIA.

62. liampria felis Osten Sackcn, West. Dipt. 2R6.

A single female from Washington Territory agrees perfectly with
Osten Sacken's description ; it lacks the tubercles of Ldmprin. hut has
the setae of the hind femora very distinct.

6:i. Ijamprla bicolor Wiedemann, Auss. Zwei. Ins. i, 522, 40 {Lnphria).

t Laphria aanioaa Say, J. Acad, vi, 158 ; Compl. Wr. ii, ^35.

Laphria megacera Macquart, Hist. Nat. Dipt, i, 284; IS (type coin|mrc<I by
Osten Sacken).

Laphria antaea Walker, List, etc., ii, 579 and vii, 527.
I liave three specimens from Connecticut in which the first .segment of
the abdomen above is black ; the dorsum of the thorax has fine golden '
pubescence, — they are evidently sniiiosa Say. Another specimen ( 9 )
from Pennsylvania has the abdomen red from the very bitse, and the
thorax without the golden pubescence. It may be a distinct sp^'cics ; if so
it must be the true hicofor of Wiedemann, as he certainly would have
noticed the black on the abdomen had it existed.

64. Ijainpria rnbriventris Macquart, Hist. Nat. Dipt. 1, 284, \9 (Laphria).

Four specimens from Georgia shf>w a considerable variation in the

abdomen. In one ( S ) it is wholly red above, except the kw?; in the

females it is chiefly bliick, with the red on the sides near the front, not

0%

AMERICAN DIPTERA.

33

ettonding quite across on the third segment. The shorter antennae,
white uiystax, and golden pubescence of the thoraz will enable it to be
' lokdily recognized.

IS. Pogono^onas dorsata Say, Amer. Ent. i, tab. vi ; Gompl. Wr. i ; Wied.
;,Allw. Zw. i, 505, 12 (Laphrin).

Three specimens from Washington Territory agree throughout with
the descriptions. I have no specimen for comparison.

M. Andrenosoma rulTieaada Say, J. Acad. Phil, iii, 53; tab. vi;
Oompl. Wr. i, 12 (Laphria), Wied. Auss. Zwei. Ins. i, 517, 31, (L. pyrrhacra),

A single specimen from Northern California agrees perfectly with Say's
description, and I believe it to be the same.

Ill addition to the species enumerated in the foregoing pages the fol-

P lowinir now species have been described, since the publication of Osten

Sncki'ii's Catalogue, by J. Bigot in the Annates Soc. Entom. France, 1878.

From the United States:

DaMypoic^n bilineatam (CalUnieus calcaneurn Lw.) I. c. 411.
Ik. qilSldrillOtatnm 1. c. 412.— California.
NeilopoKon (Cheilopogon) rubiKinosnin, I. c. 419, X. America.— "Detri-

tum et nmtilatum, * * purtie nnterieiir de la tete, extr^niite de I'alxio-

tiien ct pieds ant^rieiirs, inanquent."
The fragment left might belong to several genera.

HteiiopoKon albibasis, 1. c. 422.— California.
Ailidopoxoil vespoides, 1. c. 433.— California.
Ilolopogon iiitidiventrifi, 1. c 437.— Califomin.
lieptogasfter Hcapniaris, 1. c. 444.— California.
Laphria coral lOKaster, 1. c. 227.— N. Am., [Lnmprln'!)

From Mexico:

.MicroMtylnm fulvifEafiter, I. c. 410.
NtcnopoKon ruscolimbatnin, 1. c 421.
€<>raturKnH genicalatllS, 1. c. 443. (Antennae wanting.)
f'orniansis enpoda, 1. c. 2.34.
Apheittia nigra, 1. c. 235.
AtoiiioMia soror. 1. c. 2:>ff.
Cerotaiiiia nigra and dubia, 1. c 23S.
PogonoHoma aracbnoides, 1. c. 239.

NAUSIGASTKR n. gen,
Moderately large species, black in ground color but thickly poUinose,
with shining, numerous, small, black, punctulato spots. Head spheroidal,
broader than the thorax. F»yes bare. Front narrowed aboVe, evenly
arched to the un!;ennae, which are situated a little above the middle of
♦he head in profile. Face narrowed below, concave on upper part below
'he antennae, the tubercle near the middle large, obtuse, below it much

TItANS. AHKK. KST. SOC. XI.

CM

DKCiSMBER, 1883.

wmfgr^dU*' uvvi — r^

34

8. W. WILLI8T0N, M. D.

receding to the oral margin, resembling in structure the species of Parn^
giitt, but more concave above the tubercle and more receding below it;
the tubercle being higher up. Cheeks narrow. First and second joints]
of the antennae extremely short, so that the third joint appears sessile,')
the laiter large, subquadrate, as broad as long, the angles rounded, andJ
narrower on the basal portion ; arista small, bare, very short, not as longi
as the third antcnnal joint, remote from the base, situated upon the
anterior rounded angle near the end of joint. Scutellum small, convex,
but thinned along its margin. Abdomen very convex above, heyond
the middle being in cross-section two-thirds of a circle ; first segment \
short; second segment modemtely long; third segment much shorter
than the second, in the middle on the sides nearly as long, the in-
cisure in front forming a deep stricture, less evident behind; fourth
segment very large, as long as the three preceding togeth<>r, forming half
of an ellipsoid, flattened on one side, the strongly convex end extending
beyond the anal opening, and wholly concealing the following segments.
The sides of the abdomen are directed downward and inward inclosing
toward the outer part of the venter a dee|^ cavity, shallower on the
second and third segments ; at the posterior part of this cavity, and con-
cealed by the posterior rim, is the anal opening looking obliquely forward;
back of the anus on the rim on each side is a small obtuse membranous
flap or process. Legs as in Paragim — rather short and moderately
strong, the posterior metatarsi thickened. Wings more like those of
Syrittd than of Parngus. The first longitudinal vein joins the costa
a little before the tip of second vein, and then by a curve at the tip, so
that the vein runs parallel to the costa for some distance. The anterior
cross-vein is near the basal third of discal cell, and the third vein beyond
is gently bisinuate. The last section of the fourth vein is sinuate like it
is in St/rt'tta, but more deeply so, the vein terminating very near the
costa, but forming nearly a right angle at its juncture.

The present genus must be placed in the vicinity of Pitragtm ; but yet
it is very different in the antennae, the abdomen and the wings. The
fourth segment of the abdomen is probably composed of two, as is
the third segment in Tn'glj/phits ; it does not show any traces whatever
of such union on the dorsum, but I think I can distinguish it in the venter.

NniiHiKUHtor punctulnta n. sp.

9. — Length 12 Mitn. BlaL'k, in )rler.itely shining, everywhere except on leg*
and venter covered with thick whitish pile, \vliich, when not rubbed, leaves every
numerous, nearly contiguous circular bhick spots, more abundant on the thorax;
on the dorsum of thorax and abdomen the ground color of the moderately shining
punctulate black surface ma\ be in large part den\ided. In the nkiddle of the

TTX

AMERICAN DIPTERA.

thoracic (lorstim in a pnir of indistinct, Ic^s puliinnan stripes. Antennae wholly
f jtllowish rod; the oheek:^ and the lower purt of the face .ibscurely yellowish, in
b« middle of the face below the nntonnae there ia an oval space which is evenly
ollinose, free from the bluuk dots. Wings hyaline, with two conspicuous blackish
■Ota; the larger one beginning in the subcostal cell ut tip of auxiliary vein,
^llianoe more broadly along the marginal cell, the base of the 8ubn)arginal cell for
t third of its length, ami less distinctly opposite this on the cross-vein and base of
, posterior cell ; the smaller apjt reaching from the tip of the first longitudinal
■in nearly to the third; veins black, brown toward the base. Legs yellowish
d; the front femora on basal half, and the other femora except the tips black;
« front and hind tarsi brown.
One specimen, New Mexico.

■^•»-

EXPLANATION OF PLATE I.

Fig.
Fig.
FIR.

FiK'.

Fi«.
FiR.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.

Fig.
Fig.

Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.

1,
2

3

4

5,

fi,

7

H.

0.
10
II.
12.
13.
14.

15.
l*->

la. — Mi/elaphus melax Big.
— Ceratitrgua criiciatu* Say.
—Dicctria nitida n. sp. (antenna.)
—Dicolonua simplex Lw.

5a. — OuprioceruH Aeacu$ Wied.

fia. — Triclia tagax n. sp.
— MicroBtylum gnlac.jdea Lw.
—Habropogon bilineatus n. sp.
—1 Cyrtopogon (f Holopogon) gibber n. sp.

— Ci/i'topogon n. sp.

— Cyrtopogon n. sp.

— Callinicus calcaneum Lw.
—Nicoclea politua Say. (Abdomen of male.)

14a, 14b. — NicocUa abdominalia n. sp., (wing, abdomen of male, and
hind leg).
— Nicoclea ru/ua n. sp.
Nir.oclca divea Lw.

EXPLANATION OF PLATE II.

1, la.— Nicoclea aciiulua n. sp., (wing and hind leg).

2, 2A.~Taractirua or.topunctatua Lw., (head and hind leg).
.'<■ — Taracticua brevicornia n. sp.

i.—Lealomi/ia aabulonum 0. S.

^•—Lcatomyia n. sp.

^•—Deromyia Winthcmi \Vie«l.

7, 7a, 7b. — Ilt/perechia atrox n. sp., (head, wing, and hind leg).

S. — Atomoaia puella Wied.

9.~Pogonoaoma dorsata Say.
\^.~Aailua aericeua Say.
'1 — Mallophora laphroidea Wied.
12 — Ommaliua tibialia Say. %.
•3 — Proctacanthua heroa Wied.
H. — Promachua n. sp.
l^.—Nauaigaater punctulala n. sp.