IMAGE EVALUATION TEST TARGET (MT-3) /Mf/ ^S yip M-i Am/ I :?^^^^'^^ ; WASniNGTOK: GOVKKNMKNT PUIM"IN(} OFI'IOE. 1886. /OOBf p*^ l(ii^p»PBpp.j»iiwii...Ji.niw«iwii|i/gi^,._^ 'AJ: vn73 I^V A.>C><_/V-Ay ? '^•. us ^eparimeni of ihc ^ni«rior: U. S. NATIONAL MUSEUM. ^"^•""-'t^l HOARD OF CANADA >^iLAN-.lt8:010.:,l>;rt, r,TAiio^ Serial Number 41 ' ' ^' BULLETIlSr OF TEE UNITED STATES NATIONAL MUSEUM. IsTo. 31. PUBLISHED UNDER THE DIRECTION OF THE 8UITHS0NIAN INSHTUm)!. WASHINGTON: OOVEENMENT PRINTING OFFIOB. 1886. w>, /^63S 0( C^^ ^>^. O-^^' iK'^^ ADVERTISEMENT. This work (fiulletii) No. 31) is the forty -first of a series of papers in- tended to illustrate the collections of natural history and ethnology belonging to the United States, and constituting the National Museum, of \f hich the Smithsonian Institution was placed in charge by the act of Congress of August 10, 1846. It has been prepared at the request of the Institution, and printed by authority of the honorable Secretary of the Interior. The publications of the National Museum consist of two series — the Bulletins, of which this is No. 31, in continuous series, and the Proceed- ings, of which the ninth volume is now in press. The volumes of Proceedings are printed, signature by signature, each issue having its own date, and a smal' edition of each signature is dis- tributed to libraries promptly after its publication. From time to time the publications of the Museum which have been issued separately are combined together and issued as volumes of the Miscellaneous Collections. These are struck off from the stereotype pliites from which the first edition was printed, and in this form are distributed by the Smithsonian Institution to librsiries and scientific societies throughout the world. Volume 13 of these collections includes Bulletins 1 to 10, inclusive; volume 19, volumes 1 and 2 of the Proceed- ings; volume 22, volumes 3 and 4 of the Proceedings; and volume 23, Bulletins 11 to 15, inclusive. Full lists of the publications of the Museum may be found in the cur- rent catalogues of the publications of the Smithsonian Institution. SPENCER F. BAIRD, Secretary of the Smithsonian Institution. Smithsonian Institution, Washington, July 23, 1886. tt DBPARTMl' NT OF THE INTERIOE: U. 8. NATIONAL MUSEUM. BULLETIN OK THK UNITED STATES NATIONAL MUSEUM. No. 31. SYNOPSIS OF THE NORTH AMERICAN SYRPHIDI BY SAMUEL W. WILLISTON, M. D., Ph. D. WITH TWELVE PLATES. WASHINGTON: GOVERNMEXT PRINTING OPPIOB. 1 .S86. ■•» I liav( nay (lipt( part of howevei friends y ciatiujf ; pecially nished u I found of Phila thing I ( Washiuf eluding 1 lett, of I and Dr. species o PREFACE. i 5 That which has been aimed at iu the present Synopsis is the descrip- tion, as fnll and complete as possible, of the North American SyrphidtB. The labor involved in the determination of our diptera, save such as have been described or monographed by Dr. Loew and Baron (Jsteu Sacken, is very great, owing to the cftou incomplete and unsatisfactory descriptions scattered through tlie literature of a half dozen languages. To bring together deficriptious in such a way as will render the identi- fication of our numerous species less toilsome and more certain. Is the only means that will now materially further the study of American diptera ; the description of desultory new species is detrimental to real progress in the knowledge of our fauna. My aim has been the study of genera and species, to so describe and figure those of the United States as to render them more easily determinable. With every page I write I feel more fully how difficult descriptive dipterology really is, and that only a beginning has been made in the study of this interesting family. But the work will, I trust, serve a useful purpose in pointing out what the needs and necessities are, and to pave tlie way for a future exhaustive monograph of the family, based upon a wider knowIe''*t*'*"".V acknowledge, were re- ceived from I'rof. II. A. ilagen, of (Cambridge, who kindly permitted me to study for several days in his laboratory the typ«^ collections of Loew and Osteu fSacken. My readers will pardon me in the pride 1 take in stating that of nearly two hundred species which 1 had identified absolutely independently from descriptions, I found upon comparisons witii the types and identified species in the Loew and Osten Sacken col- lection but three or four discrepanci s. I can give no higher praise to tln^ work of these two authors that admits of such close results. To Mr. 8. li. Scudder, mj' thanks are due for his kindness and courtesy in permitting me to study his (;ollections of fossil diptera and drawings. To Prof. A. Van Name, the librarian of Yale College, my sincere thanks are also due for his unfailing courtesy and assistance. Nor should I neglect to speak of the encouragement and assistance that have been afforded me by my wife. Of the published writings on this family, I have been mostly indebted to those of Schiner, to whom the classifleation of the family owes much, and to the writings of Loew, Osten Sacken, Wiedemann, and others, wherever they were a<;cessible. Of Haron Osten Sacken's work here, as elsewhere, 1 cannot speak in terms of too great praise. His descrip- tions are clear, accurate, and conscientious; I have never been in doubt regaiding the correct identification of his species in this family. How nuu'li the present results are owing to his labors will be apparent to any one who will even cursorily examine the following pages. My heartiest thanks are likewise due him for the constant interest he has taken in my studies, during the years that I have had the pleasure of correspond- ence with him. Of Loew's work T need not speak. No better monu- ment to a talented, learned, and versatile man exists . My where in the domain of dipterological literature — and this field has been cultivated by most able, as well as poor workers — than in his Diptera GenturisB and Monographs. Hi s Latiii descriptions are models, and very much of the synonymy of the American Syrphidte is due to him. Nor should I fail to mention the conscientious work of Mr. F. M. v. d. Wulp, of Holland. He has not written a great deal on North American diptera, and that, unfortunately, is mostly in the Dutch language; but what he has written makes one wish that be had published more on our fauna in the English language, which he uses with fluency. Mr. J. F. M. Bigot, of Paris, has, with commendable zeal and industry, written much on the North American Syrphidee ; his works may be consulted with profit. mear to iid I Th toget the i V Mexico, tpropriate for hIiouUI nd South- and from , were re- permitted octioiiH of idu I take identilied nparisons iiclven col- praise to 111 Its. To )urteay in drawings, re thanks ' should I lave been PREFACE. VU i My work must have shortcomings and errors; the sabject is by no means an easy one. I only ask t hat it be accepted as an honest endeavor to advance tlio study of tliese neglected but interesting insects. The types of all but two or three of the new species described by me, together with my entire eollection in this family, will be preserved in the National Museum for tuture reference and revision. ^ ^ 8. W. WILLI8T0N. Yale Oollkoe, New Haybn, Conn., JiMM 1,1886. indebted res much, d others, ork here, s descrip- 1 in doubt ly. How Mit to any heartiest ien in my rrespond- :er monu- ere in the cultivated CenturisB ery much or should Wulp, of n diptera, but what Dur fauna J. F. M. )ten much dtcd with *' ilicnido Clirj-80t( P.aragos Niiiisij^iii Pipiza . Fsilota . Leprouij Chrywoyi ChiloHia Mola!io8t Pyropliu' Plafychii Li'ucozoi Cataltciiii Enpeodc! SyrpIniH. Didea . . . Xanthoyi All();j;rap( 5Iesograii S[iha)i()pl Pelecocor Neoascia 8phe)j;iiia Baccba . . Chalcoiiiy CONTENTS. I'age. XV XVI XVI XIX XX XXI XXI XXII XXII XXIII XXIV XXVI XXVI Mix ^'^K®' Myiolopta J27 Kl>iiiS'a 12!> Ktigenianiyia l;{0 Hi'iiohyopa i.ji Volucflla IJ4 t'fipPKtyllllll [rj 8fii(i(.invia I53 ArctopLila |r,7 Eristiilis jra Doliosyrpbiis j7^ Pteroptila j^g Heloiiliilu8 jj^.j I'teriillastj's jg^ 'J'lMtcllocilcilliH jqg Mallotu ^(,1 Triodduta 205 Ti(>i»i(lia 4)Qg Criorhina 209 Cyiiorliiiia 212 Soiniila 2lG C'rioprora 217 ^"•^•'f'^ 220 Bracliypulpus 221 Xylota . Syiitta . Clirysoclilamys 240 Meiapioidus 24;{ Chilosia .... OH i ^P'>""'yi'' 214 Molanostoma....';; .« i ?!*;!"""'*"""' 249 pyn.ph..na Z'..'::..::: ^^"' Platychirus Lt'ucozoiia CatiilKimUa Enpeodcvs ^.^ Syri»I»is ,;^j Didea Xaiithograiiima Allonrrapta 5Iesograpta Sphanophoria ^04 Pelecocora Neouscia Sphe)j;iiia Baccba Part I.— Classification Synopti(! tahlo of tribes Microdouiiii Chilosini Melanostoiniiii Syrphini Pfilecocerini Spbegiriini Bracbyopini Voliicellini Sericoinyiiii xxiii Ki stalini Xylotini Milesini Cerini Family cbaracters Table for tbe detcriiiiiiation of gt "•''•a r..xxvu Part II.— Descriptions, ilicnidoii ;{ Cbrysotoxiim I3 Paragos Naiisij^abler Pipiza 17 21 22 Psilota OQ Leprouiyia Cbrysogaster 224 2;k> :!i 54 r>(i til <)2 89 91 96 98 110 111 ii;j IKi Chalcoiiiyia 12G 254 i Spbt'coiuy ia 256 Ccria 2:.9 Part III.— (joxcmsion Habits of tbo Syrpbid;^ 2m ^'"■^'"' 270 Structural cbaractcrs .>72 Secondary sexual <'baracters Geogrupbical distribution (ieologiciil distribution 281 Chronologif a? list of genera 28:J Dertnitiou of teuns 287 Appendix 291 Explanation of plntes ;{')4 Index JJ27 Plates I to XII :?o,% 278 IX P^RT I. CLASSIFICATION. NORTH AMERICAN SYRPHID/E. PART I.-CLASSIFIOATION. The family of Syrphicke is one of the most extensive in the order of diptera. Nearly or quite two thousand species are known from through- out the world, and mauy new forma are constantly being added. They contain among them many of the brightest-colored flies, and numerous specimens are sure to appear in every general collection of insects. None are injurious in their habits to man's economy, and many of them are very beneficial. In the following pages about three hundred species are described from the region north of Mexico, so that I trust even the non-entomological student, with a little exertion, may be able to identify them. That there are many more species within these limits is certain, e- necially in the southern and western regions. From Europe over live hui.'lred and fifty species have been catalogued ; doubtless nearly or quite as many will be eventually accredited to North America. Th<^ family is easily and exactly defined ; with but few exceptions by the presence of the spurious vein of the wings alone ; in all, by the etruct- ure of the head and the ne uration. Its i)ositiou in the dipterological system is thus given by Brauer : Suborder CrcLOBUiiAriiA. ■• Section Atchiza. Section Schizophorida. Tribe Syrphidce. (SyrphidcB, 8. str., Pipuneulidm.) Tribe Jlypucera. (Phoridce, Platypezidce.) Tribe Evmidce. Tribe Pupipara. Sehizowetopia. (Muscidce ealyptrato!.) Holometopia. {Mtueidoe acalyptrata^.) While, as a general rule, the ISyrphidw present excellent specific characters, there is a remarkable dearth of generic or group characters. The richness in species, the many intermediate forms, the absence of marked plastic variations, all tend to make the family in its subdivis- ions an exceedingly difficult one to define with clearness. From this fusion or coalescence of gener-', we are often compelled to base our classi- fication upon what appear very trivial ditfereuces. Species n)ust be grouped together that show natural relationships, drawing the divid- ing lines where the largest intervals occur. Their classification ulti- xux XIV BULLETIN 31, UNITED STATES NATIONAL MUSEUM. mately mast in many cases depend largely upon convenience, and the views of those best qualified to interpret natural characters. Not sel- dom these vie'va will rest, more or less, upon an indefinable totit ensem- ble, the instinctive or natural grouping of the trained eye and mind. There are no generic and specific Huiitat'ons in nature ; this fact, tlianks to modern philosophy, we have nearly all learned. But by no means does it follow thai, there is no such thing as classification. A hor.se and an ass might show all possible intermediate characters, so that one could not say when the horse put off the caballine and took on the asinine nature; but nevertheless the hor.se is still a horse and the ass an ass ; the only vexatious question would be when and where to label the one eahallus and the other aainus. So, indeed, does the question come home pertinently in the small fragment of zoological life treated in the follow- ing pages. With a knowledge of but few species, classification was not diflficult, and definition easy, but with the discovery of numerous and nuiltifarious forms generic bands become stretched and thinned till at last they are rent asunder, and nothing is left but individual coherence. Even a novice v^ould be astonished at the proposition to unite a Chrym- gaster nitiHa and a Syrphus lap2)onicns in the same genus, yet the chain between them is complete : nowhere do dift'erences exist that can be ac- credited with more than specific valuation. Nor is this a solitary in- instance; the majority of genera in the family do not admit of true generic definition ; the best that we can (U) is to point out where one shall end and the other begin, a proceeding which sometimes {Helophilua, for iu- star.ce) entails the result that a species differs more from some of its own associates than it does from members of other genera. What, then, are we to do? Make a genus for every difference? As well abandon species. Make only genera that can be limited by generic characters t As well abandon the family. In steering clear of Scylla we may be engulfed in Oharybdis. No characters offer for the accurate or even clear separation into sub- families. The best general division that we have was that proposed by the erudite iSchiner, based upon the position of the anterior cross-vein. Though, like iP'j:,t of the higher characters in this family, it admits of no sh^rp definition, nor dispels doubt in many cases, it is unquestion- ably a natural one. In no case can a si)ecies with a well marked, oblique, and exterior cross-vein be placed among those with an internal and rectangular one, yet in not a few we cannot easily deciut ensem- Lid mind. it, thanks 10 means loi'se and 3110 could e asinine 8 an ass ; !l the one * juie iiome [le follow- Q was not irons and led till at oherence. a Chryno- the chain can be ac- •litary in- Lie generic shall end us, for in- >me of its hat, then, abandon aracters f 3 may be into sub- »posed by ross-vein. idmits of question- , oblique, rnal and which of sitication y defined, ecessary. Qo means pon ulti- natural oh is con- ripnlidsB, 1 a limited classification may happily admit of a far wider application. In such a family as the Syrphidoi many disturbing elements must naturally intrude themselves with the ingress of new forms; but the knowledge of the world's fauna can only be obtained from the assimilation of more or less heterogeneous parts into one homogeneous whole. My autoptic knowledge of genera is almost exctlu.sively confined to the European and North American forms, types of nearly all of which I have examined. SYNOPTIC TAULK OK TKIBKS. . Anterior cross- vein of tlu' wings distinctly before tlie middle of the discal cell, usually nearly rectangular; third longitudinal vein rarely with a distinct curvature into the first posterior cell ; hind femora rarely thickened. Usually smaller, more delicate species, generally thinly pilose SYRPHINiE. b. Third joint of the antennte with a thickened styliforra arista or style. Pelecocerini. bb. Antenna) with a dorsal bristle. 0. Third joint of the antennae not both elongate and with a strongly plumose arista ; marginal cell open. d. Antennio longer than the head, rather large species Microdomm. dd. Antennte not longer than the head. «. Front long, inuch narrowed above in the female, cheeks narrow, face considera- bly narrowed below, abdomen frequently contracted beyond the base, more or less slender Baccuini. «0. Face not remarkably narrowed below. /. Epistoma projecting, face without tubercle; abdomen contracted toward the base, in outline more or less club-shaped ; small specieB. Sphkginini. ff. Not such species. g. Color chiefly reddish or lutescent Brachyopini. gg. Color not chiefly reddish or Intescent. h. Metallic green, metallic green and black, or black species, rarely with luteous markings at base of abdomen, and on the humeri and face ; abdo- men never with entire shining cross-bauds Chilosini. hh. Black or greenish black species with yellow or yellowish stripes and bunds, or at lenst with entire shining croiss-bands on abdomen. i. Face black Melanostomini. «. Face partly or wholly yellow Syupiiini. cc. Third joint of antenntB elongate, with a strongly plumose arista ; marginal cell usually closed ; thick-set species Volucellini. aa. Anterior cross- vein near or beyond the middle of the discal cell, usually oblique; hind femora frequently thickened. Usually larger, robust, pilose specie 3. ;. Antenna) with a dorsal bristle ERISTALIN.^. fc. Third longitudinal vein bent deeply into the (irst po.sterior cell Eristalini. kk. Third longitudinal vein only gently curved or straight. {. Arista plumose. m. Third joint of antennic elongated Volucellini. mm. Third joint of autenniM siibquadratti; marginal cell open Sericomyini. II. Arista bare or pubescent. «. Thorax with distinct yellow markings Milesini. n«. Thorax without yellow markings Xylotini. jj. Antennte with a terminal style CERIN.fi. XVI BULLETIN 31, UNITED STATES NATIONAL MUSEUM. MICRODONINt. Anterior croasvein near the base of the discal cell, or war the middle^ and more or lens oblique. Marginal cell open. Legs slender, third joint of the antenna, at least, elongate, the first more or lens so. Large, species. a. Face rouiiiled, piloHe, h. FitHt poHtorior coil witJj a stump of a vein from X\w tliird lon^fitudiiial vein ; Hcuteiluni flattened, UHuallj with two jwintM Micijodon. hb. First posterior vein without such a Htninp of a vein; Hciitelliiui 'vithoiit points. M1XOGA8TKK. €M, Face ]»roiloHo Piimza TiilUn dd. Viu'A' not evenly rounded and jiilose, tulteniilate. e. Abdomen with oidy four visildc se^'Mients; iiristii Hhort, suliaidcal. NACSlOA-STKIt Will, pp. Abdomen with at U-a^t hve visible .se;;ni('nis. /. I'aee partly or wholly yrllow; abdomen imnctiilate, anti'nna- climiiate: small spoeies l'Ai!.\(irs J>,itr //. l'a<'e wholly blacl , or at least only with iuteous spots ; antenna! short. t/. Ilinil femora slender ("llil.osiA Meig. gr). Ilind femora thielo'ned ; epistonia projeetiny,-. /(. Seiitellum nnnsnally l.ir;;e, nearly s(|uare in oiiliine; mules di.lioptie. CllAI.KlMVIA Will. Iili. .Seiitellum not unusually large, considtM'ably broader at tlieliase; nicies holoii- tie .Myioi.I'.PTA Newni. There i.s cDiisidorablc^ diversity in tiii.s oroiip, but tlicre i'nu be no natural (livisioii, so ch)soly (U) th«^ cliai' 'ter.s bUMid from one to the other, and l)ewinse the relation.ship.s do not i)eriuit si linear arrano^einent of tin' ;;enera. Cliilosid may be taken as its most i)rcd()minant type, from wliicli Clif(lci>iuyi(t and yaiisif/dnfer depart the most. The fjeiins it.self i.s a larji'e one, with a considera!)!(' diversity of forms, but wiiich, so far, lias eluded attempts at latioua! subdivision. The lue.sence of a swollen ifrontal triangle, or frontal groove, is eharacteristic in not a few species, but they areevane.scent, and not of siiUicient uniformity to warrant their iu.se exclusively as a generic distinction. The neuration varie.'^ from a 'PipizoidtoaSyrphoidtype; none except artificial distinctions can be made iuse of here. The antenntc show only slight variations; generic, charac- ters l)a.sed chietiy U])on these organs are not generally reliable through ont the family. The ])lumosity of the arista has been propo.sed as a nutans of distinction; but the plumosity is never very strong, and the ultimate generic boundary would often depend upon the power of the Kmis emi)loyed ; nor can this character be u.sed in connection with the pilosity of the eyes and the hairiness of the face, unk^ss we are prejjared to dub every possible i)erniutation of the three characters with an inde- pendent title. The pilosity of the eyes is also unsatisfactory ; its use will separate allied forms and bring together irrelevant ones ; moreover, here, likewise, the microscope and possibly the imagination would Bometimes be the ultimate generic distinctions. The hairiness of the ^ace is in itself wholly insufficient, .lud bears no constant relation to the )thcr more inij)ortaiit characters. The thoracic bristles imperceptibly jhange to hair and then to pile. The limits of the genus are al.so doubt- iul. From Chrysof/aster on the one hand, and Melanonioma ou the other, nothing more than s|)ecill(! .separation is yet jwssible. The relation to I'ipizn, through Chrysoffoster and P.sUota, is equally obvious. Yet again We cannot overlook the natural affinity with species o{ Myiolepta. l'il>iz(t and r.silota, as here emjjloyed, are unquestionably nearly re- lated forms; indeed further discoveries may require their union. The former genus has been very nuich subdivided. A knowledge of nu- merous .species, however, constantly tends to break down the distinc- « 1 XVIII niIM,i:TI\ 31, UNITED 8TATKS NATIONAL MUSKUM. tioiis. Tlu' follttwiii;; ill*' the cliiiiactrrs usiii'i-i(; siib(li> isiotis : 1.— 'I'll i III fill I el 1 1 111 I Jiijnt slrl'iliT IIIkI loll^ 2 Til I I'll Jill II I sliiiii mill linnul 3 2.— Tlif iiuxiliiiry vein tcriniiiuti's l)i?fiiri> lluuinti'rior i-msM-vtin I'iimzki.i.a IJoikI. Tlif iiuxiliiiry vein tiMiiiiiiiitcs Ih-voihI tin- iiiilt'iim ridss-vcin lli;iii.\(iiA Kuinl. 3. — i'roiitiil triaii;;l(* i>f llio iiiiiU- (oiiiiia 'iitivrly liir;;i' ami airlii'il; IVoiit of I'finaU' wit bout a til ft of whiter hairs near tlif orliil ... 4 Fioiitul triaii;;h' not lar;;c, of untial (oriii : front ol" friiiali' with « tuft of whilo hiiiis iH-ar tlitMnhit I'll'iZA I'aUoii. 4. — liiiiil coxa* of male with N|iiiioiiH procu^iH; front uf I'iMiialc with a diNtiiu^t tniUM- vcsrso yroovt' m-ar tin- iiiiililU; Cnkmodon K;;>;t'r. Malu cnxiu without N])iiioiiH proci-Ns; front ol fiMiialu without trauHvurue Sroovf I'K.MiM I'hil. An t'xamiiisitioii of those cliaracti'is seriatim will, I think, show their invalidity as jteneric distinctions. 1 by no means wish to say that they are withont value, or that the names shonld be abandoned, but that their present substitution is notjustilied. 1. All intermediate staj^es will oeeur between a lonjf, slenainst it as aj;ainst the two pre- cedino- ones. The s ime feature occurs in species of both Cliilosia and C'liry.so(iaNt(;r,iunl was formerly made use of, in the former at least. Its acceptance here will, pari passu, necessitate its em])loyment in allied jienera. 4. The ju'esence of a coxal spine is perhaps of {;reater value, yet we must not Ibrjjet that the same character is disregarded elsewhere in the family. Xo one will think of generically separating Xijlota bicolor and A'. iibinliH, or llclophHus distincfus, that has been v.onfounded with JI. chrysosfomiis, on this character. The introduction of such line distinctions is undesirable in any genus wlieii characters of the same or similar nature are nnrecognized in allied genera. It is tru(! that arbitrary distincMons in the comparative slia]ie of the antenna', etc., we are compelled to nsv to a great extent in tli<' MuNcidw e(tl;/ittr((ta' ; but at the same time we must admit the almost insuperable (lilliculties which the.se families present to sys- tematic study; so great, indee.l, that there are but three or four ento- mologists (among whom we must award to Mr. Ivowarz the first rank) who are capable of interpreting them. Two species of Trif/h/jiliiC'i have been described by Loew ; both ol' them 1 have placeil nnder P'/x'cy., as from an examination of the types *Wien Ent. ZiMiiing, iv, '^41. i at Ol Ntanr abdo <'ies. other oevv could have overlooked the striking relationship between /jpnmifitt cnlopuH and Mifiolrpta striiiilata I cannot ac(;oiint for. In the latter the third Joiiit of the antenna' is distinctly elongate, the femora are all thickened, with short spines below, and the body is clothed with sparse tomeiitum, all characters of the genus. Tlie genus thus holds au intermediate position, connecting CItrijsoijashr and Mi/ioUpta. I MELAXOSTOMIXI. Sniiill, elonf/tifr, fhiuli/ pilose ftpecies^ deep black or tihininff (/rccn, the ob- ilomen uxuaUy sh-xder xcith interrupted bandx of briijUt yellow, orange, or {jrtriiisli-ycJloir color; face nniformh/ blacli, or at least nercr irltlt lif/ht {/roil )id color. Antcnme short, face tubcrculatc ; nenration Syrphoid ; legs alcndcr. u. Wings not loiif^cr tliaii tlio alxloinou ; ocollartiibort'lf larj^c, iironiiiuMit ; iiltdoinen ii8 «r orangf colored. l'vi:(ii'ii.i:xA Scliiner. iit til)i;'! ainl tarsi in Imth sexes slender, not widened. . Mici.anoskima Scliiner. The genus McUinostoma may be taken as the tyjieof tliis group. The only ultimate dilference between this genus, .^ ■> far as I can iliscover or delMie, and Cliilosia is in the absence of entire abdominal cross-bands. On the other hand, the distinction iroin Siir2)hus is jiurely specilii;. The relationships of riatychirus n\u\ Pyrnphccna are obvious; indeed in the XX BULLETIN :n, nNITEI) STATK8 NATIONAL MUSEUM. femaUt tluTc is sj^iin'cly any appn'ciahlr (lilliTciuus at l«'ant in tlio former };emiM. l*{iropli(V)tn is an t'xcoliciit t'xanipli! of a faulty taxononiic, chiK Nill(;ation ; wliilc tiic tlattcnln^ of the toi'('l(>;;.s is made a ^'fncriit vUwr- acter in I'latifvliinm, niu(;li ^''^'iitiT strnctiual ^lillrri'iici's in tlii' Ir;,'s of Pjfroitlnrua: only rcccivti a spceilii- valuation. Undoubtedly, should the nuMdier of species winrant if, a ;,'eneri(r line will be drawn between /'. oc7///>/and /'. r(t.s«in(iii,\m\ on the basis of natural elassilieation it should not matter whelhera j^enus contained one or ont^ thous.iiul species. Jt amy be ol)jecied that tiiis ^noup is n«>t entitled to the rank I jjfive it; but if it l)e united with the Si/rphini, \\iv t'liilosini must be also. Shall wji place ChryHiujdHlcr and ^Sijrpliun hi one group ll As well place tbe whole family in one group. 8VIM'1IINI. Black or {freenislihlack ftpeck'n, itHiiallif with yellow abdominal bands, the face whoUij or in part yellow. Martjinal rell of the icin().s wide open, third vein raicly (l)idea) cur red into the Jirnt jWHterior cell, anterior cross- vein near the base of the discal cell. Antenna' short, face tiihercnlate, abdomen usually oval, le(/s slender, hind femora rarely thickened (Meso- grai)ta sp.). a, Tliifkly pilost'siuicicH; uhtlomcii fiiiitf oval, lirondor boyond llu-iniddlt^ UiiHiil jxn- tuni of a1)(lomi>endage8, arcuate, bidontieulate at the end, embedded in grooves when at rest. In the female th(! lifth segment half as long as the i)reeeding. Scutullum much raised, exposing metanotuni Eltkouks O. S. 00. Hypopygium without slender a]>i)endage8, sixth segment of male not jfeenliar; lifth segment of female one-third or ouofourth us long us jireceding segment. d. Third longitudinul vein with a distinct enrvature into the first ))osteror eell ; third joint of the antennuj elongate-oval Didka Macq. (Id. Third lougitudinal vein straiglit or gently curved ; third joiut of antenme siiort oval. e. Eyes of male with an area of enlarged facets above; front very convex; hypopy- gium very small C'ATABOMnA O. S. re. Eyes of male without an area of enlarged facets above; front moderately convex; hypoitygium not very small SyrpiP'-S Fabr. bb. Thorax with yellow lat<'r.il stripes. /. Eyes of mule with an area of enlarged facets above; fourth segment of abdomen in both sexes with two median yellow stripes and an obli(jue spot on each side Allogr apta O. S. ff. Eyes of male wholly without an area of enlarged facets above; fourth segment of abdomen not so marked. fh i 8YN<>P.*«IM OF N'OKTU AMKKICAN SVKI'llIli/K xxr ) foniuT lie, t'.IiiM ic, cliiir- • U'J^H of Xllll till' Wl't'll /*. t .shoiiltl •ii's. k 1 K'^'*' bu also. ell pluco i 'iilf open, iot' eroNH- hervidotc, id (Mtso- IJiiHal por- •JA ScliiiuT. 4 tlicr, l>nt Hide of tho jM' III lilacs, s wlicii at |)ri!tt'(liiiK. >I)KS O. S. liccnliar; ]»ri'ce(liiis itfior rt'll ; IDKA Miicq. eniiie Hhort ; liyi'"i'y- OMUA O. 8. \\y coiivfx; i'ii:s Fiibr. [)1" iibdonieii blique spot lAPTA 0. S. segment of 1). I'licr ircnliii;.'' : tliiiriix wjtliiiiit Mii-diiiii ilotMal I'iiii ri'oiiH liiii'. \amiiim,i:.\mma Srhiiii'r. (/»/. I'liri' Htiitiinlx ptdji'itinit Im'Ikw. /(. DnrMiiiii of till MUX witli II tiit'iliaii liiH'ri-niiN liiif MiHOdiiAiTA I.iii>w. I>l,. lliirsiiiii III tl.iiias witliiiiil siiili line iSni.lliiil'iiiiiilA St. F. iV Sitv. Tin- ;;»'iius Siiritliiin, lis now rrsf nctnl. prcst'iits a tciiiiii kalilc iini- roiiiiilN ill stiiictiii'iil cliiinictcis, iiiiil rvcn iii iiiiit Kiii;:s, as well as in llir li\il,v ol' spccilic (;liaract( rs. A It'W «liv«'r!i:<'nt roiiiis, it is true, as S. i/niiriihitiix, ai«' f^i'di, hiil on tlu' wlioli- the ;f<'nns is a rtosf oiif; tliis, |io\vf\«'r, has not incvcntcd att<'iii|>ts iit siiitdivision. Tiicic an-, llioii^li, many osciilaliii<^ points anion;; its conclatcd t'onps. l-'rotn IHiliii, tliron^li N. iirciiiifits InippouicuH, notliin;; nioic than spccilic, dij" Icit'in-cs arc found. I'roin A'lUitlioffrtimnin, throii;;h \. < unirfjiinitinii, {\i\'- I'cicnccs of even h-ss value appear. Its coaU'scciicc witli Mehinnstntna (tlii()n^li iV. Hiniplf.r, Cor instain't*) has alieaiiy been toiiciied upon. Otiici allied j^cnera are Cotohouiha ami IJiipmilts, wiiere tiie din'cij'iices are almost wholly conlined to (lie male sex. I.nivozoiut is strnetnrally iliicd. but the pilosity and marUin;is remove it liirtlici'. W.ith Alio- i/niplii, Spliuioplinriii, and Mtsotpaptx. the relationship is likewise very apparent. All these have a m.>re or less elongate alxlomcn, as in some species of »S'v/7>//«.s, bnt besides the yellow markin;;s of the thorax tho stnurtnre of the head is similar in the last two, to which Asarkina may be added. Tho {,'enus Peleeorcra show8 the nearest relation with the Syrphini; but the structure of the liead removes it so far from the other jjenersi that I prefer to ^ive it an indei)endent place here for the present. SPIIEtiJXIXI. SiiKtllj slender, ehuHjaic, thiiih/ pilose species, with more or less yellow nuiriiiiiijs on head and abdomen. Antenna' short, cpistoma produced; ni((rtjiii((l cell of the winfis open, third longitudinal lu in straiijld or yently rurrcd, anterior croHS-rcin near the hasf of the disval all and reetamiular, alidonu ii eontraetnl towards the base, the i/rcatrsl width beyond the middle, ill outline einbshaped or spatulale; hind fouora thiehened. I'. I'.piNlipiiia produced anti'i'ioiiy, in jn'olilc drrply comcmvi' IVom jiiitiMiiia> to tip; llii 111 joint of antennae nearly orliiciilai'. Spni:(ii.\A Mfi^- '*//. I",|iisl()iiia laodnct'd iiioi'c dowiiwai'd, in ]ii'olilc sli^^Iillv coiiiMve IVoin aiiti'iina' to lip Ni'.oASciA Will. This };roiip in America offers well-defined limitations, characterized by the small size, abdomen, and face. It is one of the oldest geolog- ically. XXII r.rij.iynx 31, ixiTr.n statks national museum. IIKAC IIVOIMM, Mnth>a:r si:t'(l. iictirln Intrv spfvics. vhUjhj or icliollif retldish or UiIpovSj or, if ill Idifir jiait hhirl , irithoiit lif/ht i/rlloK' iiiorhiugs. Antenna' short; obdoiiii'i not clnhxlmiinl; o titer ior cross- vein he/ore middle of the diseal cell, UKUi/iiKll eell iride o/yr». (/. K|iiNti)iiiii jirodiiccd into a loii^' sltuidtu' porrcctcd .'siioiit; feniorii .slt-ndcr; tli» tliiid li)ii};'iiiidiiial viiii jdiiiM llui costa ln'yoiid tlio tip. ..IJiiixgia Scopoli, ,1(1. I'iici' iM)t so |ii'(idiirfd, hind li-iiioru inoro or lens tliic'ir less < longnte, the arista always plumose ; eyes nsuallypilose ; body nearly hare or t hich I y pilose ; abdomen short, thiek, strongly eon rex abort' ; marginal eell if the icings nsnally closed and petiotate, third longi- tudinal rein nearly straight, the fourth rein Joins the third a considerable distance before the tip, inileeted ; anterior cross- rein usually towards the base of diseal cell ; legs slender, hind femora nerer thickened. (I. Arista vt'ry densely i)lnmosi', appoarinj^ like a solid iiiass. ..('orKSTYiA'M Maecj. an. Arista Ceatln-ry i)liin)ose Voll'CKI.la Geof. The pH'sent and following groups contain, with few exceptions, more robust, thick-set, and usually pilose, species. The two genera from the United States, located here, are sharply separated from all others by the presence of a closed niiirgiual cell and plumose arista. In certain species of Volucclla, however, the marginal cell is closed very near the tip of the second longitudinal vein, and rarely, in some individuals, is narrowly open. Such spec^ies foriii the natural connection wit'.i J'hala- cromyia, ditferingonly in this respect, a genus, so far, extralimital, and bearing the same relation to Volucclla that Ilelophihis does to Uristalis. It is very desirable that Volucclla should be divided ; the species are numerous, and a considerable variation exists among them. No char- acters have, however, in my opinion, been lound that will accomplish this result satisfactorily. Temnocera St. Ftirg. & Serville, an«l Atem- nocera Bigot, are too artificial in tlieii' limitations. The former is based upon the excision of the third Joint of the antennae and the presence of bristles upon the scutellum. In a number of sjjccies the bristles are ««. id' short ; he diisfal •iidir; tln» A Scopoli. rloiif^ate, ^ MYIA Will. «)I'A MlMJJ. IILA lioiuU est asso- (l among lihingia aration it lid mighty ideiicy in tint of the IhipUose ; jlif coin' ex lirtl Joufi'i- nsUhr (title wards the iXM Miicq. icr.LA Gfof. 0118, more from the others by u certain near the idnals, i.s t!i Phalli- ital, and EristaliH. jocies are No char- corn plish nd Atem- is based eseuce of sties are 4 SYNOPSIS or NORTH AMERICAN SYKPITID/K. XXIII present without the antennal (^h .'acter — for these Atemiwcern is ])n)- posed. l»nt to be consistent yet anothei division should be created for the ex(!ised antennic without the scutelhir bristles, as in Volucclla meffaccphala. ICven such a dismenibennent of tlie genus might b(! well, were it natural, but it is not ; allied species are torn asunder and unre- lated ones arc thrown together. A natural classification, moreover, would require the same treatment of Phalacroiuifia. SI<:UlCOMYIXl. Large species; antenna' short, the third joint scarcely longer than broad; arista basal, plumose ; anterior cross-vein, of icings oblique, near the mid- dle of di seal cell ; kind femora sometimes thickened. a. Moderately pilose ; altdoiiK'n with yellow iiiterr\ipted cross-bandH Skuicomyia Meifj. ««. Thickly pilose, abdomen nuifonnly black Arctophila .Scliiner. This group at present is limited without much difficulty. Still the forms are not very closely allied in some of their species. The con- nection between the two genera is found in S, niiUtaris. In Arctophila Jlagrans the thickened hind femora and curved third longitudinal vein present a relationship with the next group. ERISTAIilNI. Mosthj large, pilose species, uniform in color, or more or less variegated ; third joint of the antenmv short, oval or transverse; third longitudinal vein with a deep eoiicavitg into the first posterior cell; anterior cross vein near or hegond the middle of the discal cell; hind femora thiclened, except in species of liristalis. «. Mar;;iual cell closed and petiolate. ft. Thorax never with yellow niarkings. (1. Frontal trianjrle of male strongly protuberant DoLiusYKPHrs Bigot. tc. Front evenly arched Kristams Latr. bh. Thorax with yellow Hjjots. d. Hind femora without a conical projection below, near the end, Pteroptila Loew. dd. Hind femora with a p -yection below (Milesia). aa. Marginal cell o])en. e. Arista plumose (Sericomtiini). ec. Arista bare. /. Face with a longitudinal ridge in the middle ; hind femora ntrongly thickened, and with an angular protuberance below Tropidia Meigen. ff. Face not distinctly carinate ; tubercuLate or rounded. g. Thorax and scutellum not densely jiollinose above. h. Third joint of antenna- oval ; dorsum of thorax usually with distincit stripes, Helophiix's Meigen. hh. Third .joint of antenn;o broad ; throax not vittato. i. Thickly pilose Mallota Meigen. it. Thinly pilose Triodonta Will. Teuchocnemis O. S. gg. Thorax and scutellum very densely pollinoso above PxERAr.r.AsrES Loew. T XXIV BULLETIN 81, UNITKD STATES NATIONAL MUSEUM. This jiToup is a natural oiio, but it Lsiiot dislinctlysopa rated IVom the following. ErisUilis shows u considorable diversity in coloration, but less in structure. In many of the species the hind leniora are slender, in otiiens sometimes much tliickened {Simoidcs L\v.) ; this cliaracter will not, liowever, serve tbi- generic separation. Nor can tlie al)siMu;e of the moderate plumosity of the aiista [Eristdloiiii/ia I'ond.) serve to divide the ;',enus. It tlmnvs to<;ethei' uni«'h)ted species. The pilosity of the eyes seems to be equally unsatisfactory. The relation^liip nl' PhKjiovcra, tSenaspis, /^/owc>■^^s•,i>r>//<>.s7/^j;^/^s•,Jl/(Y/a.s/>(^s•, el c.,ean not a! ways be sharply reseuce of dense jxilleii on l!ie upper surface of tiie thorax and scutellum, but IVuchocnemis mnl Tr'uulnuta are not so easily disposed of; botli of tliem differ Irom Mallota in being thinly pilose, but there is no other taugil)le cliaracter. Tcucliociumis was based u])on the presence of an internal hind tibial spur in the male, but the same feature occurs in the ti'ue Mdllotw. The two species placed in this genus are not homogeneous. TriodonUt cannot be phuH'd underil/fror7o«, on account of the antenriiii, termination of the fourth vein, etc.; its di- choptic male is coinuu)n to Kuiopean species of Mallota. It U very singu- lai' that the genus Mcrodon, so richly rejnesented in Europe, does not occur in our fauna. The relationship of Malhta is evident with Xylota. (See Schiner, Nov. Exped., 'M'A).) XYIiOTIIS^I. Third loufi'itiuUnal cein oitli/ fjcndij curved, marginal cell open; anterior croHH-vc'ni near or bei/oitd the iniddlcof dinvul cell, ii.suiilli/obU(ji(e ; antenna' short ; thorax without ijelloic nuirJiihfi.s. Xi/lo/iiii. — AlxloiiH'ii inorc (ir lihs cioiiji.'itc ; liiiid rciitora moir or less tliii.'kt'ncd, witli projei'tkiiis or npiiiL's Iii'Idw : I'mci' williont tiilici'dr; irmiIv liiirc spccieH; eyes larye. a. I'aei' Ktroii end 'I'ltoriDiA Meij;. art. I'aee not eaiiiiati'. b. Third Hexnunt ol' the airdonicii in the mah- veiy iniieh contiaeli'd, eyliiidrieal, tlie hind I'eniofa iniieh IhicdviMieil, with a liilid s])ine below at the tip. Eyes very larf^e, face small SK.Noti.^si i:u Macq. " I'^veii this dill'erenee is not aeeepted l)y Sehiuer in Ilehipliiliis aulijmilK.i .Sell.— No- vaiii Exiled., o.V,), — Aiieklaml. [. . IVoin the ition, but .1 slendiir, acter will iici' of the to divide ity of the )('sliaii)ly he distill In North 1 10 closure \'() j>eiieni ■]ri,sf(iUinis )ut any of narr(»\\iy illofa only Ihe <;roui) y one, and lied by its L'r surface are not so ing thinly was based le, but the ced in this rMeroflon, tc; its di- ery singu- , does not th Xylota. I ; anterior antenna' iktMKMl, with eyt's ItUf^e. rot ;il)is'itii(.'(! riDiA Mui^. cyliiKhiciil, ,it llii! tip. -ir.li Macq. i.-t Sell. — No- i SYNOPSIS OF NORTH AMERICAN SYRPHID^. XXV 56. Hiud femora more or less tbickeaed, with spines or bristles below, nevor with a bitid spiue ueiir the tip. c. Hind fcuiora very much thickeued, anterior cross-veiu rectaii{;»lar, Syuitta St. F. & Serv. CO. Hind femora m .'ir rcniiirkably thii:kemHl, hind coxaj often with .spinous process; cross- ^ein always obliciue Xylota Meig. 6V(oWiiH(«i.— Mostly \ui^m species, pilose. ((. Scutelluni, margin of thorax, and plcuriu with bristly hairs; face distinctly tnber- culate; femora sliMuler Chuysochlamys Kond. au. Thorax wholly without bristly hairs. h. Face short, not produced, concave, not tubercnlate ; hind femora more or less thickeued. c. Abdomen elongate. d. Al)domen shining or oiKKjue black BraCUYPAI,PL'.S Macq. d(l. Alidomen with bright brou;-,e cross-bauds Calupkoijola Rond. ' < . Abdomen viry broad, thorax densely pilose, largo species, PocoTA St. Farg. & Serv. bh. Face iifodueed, longer than the front. (. Face produced forward, i)ointed, concave from the antenna; to the tip, not tuber- cnlate, subeaiinate; hind femora thickeued Ciuophora O. S. ri . late not evcmly concave, tubercnlate. ./'. Third joint of anicr.iue jiroduced above into a conical process, terminating in the thickened ari.'-ta ; femora slender Mehapioidus Bigot. j'J. Third joint of antenna', transversely oval, but little broader than long; femora rarely thickened CiUORUiNA Macq. Tropidia, Senof/astcr, Syritta, and Xylota form a uatural, slightlj' diver- j^ent group, showing an unquestionable relutioushii> on the one hand with Mallota, on the other with linichypalpuH. The relationship oi Bracliypalpus with Foeota and CalUprobola is evi- more or less elongate process which bears the antennae. Antennie usually porrect, approxi mate at their base, three-jointed ; the third joint more especially of varied shape, usually flattened and with a dorsal bristle, either bare or pin mose; very rarely the third joint is not flattened, and is provided .it the tip with a thickened stj'le. Eyes large, bare or pilose, in the male usually contiguous between the base of the antennie and ocelli. Ocelli always present. Thorax comparatively large and robust, moderately arched above ; scutellum large, usually convex, often translucent, rarely with spines on its border. Tegulae of moderate size. Abdomen com- posed of five or six visible segments, rarely with only four. Hj'popy gium usually not prominent. Shape of the abdomen variable; slender, linear, clubbed, short, oval, and all intermediate forms. Legs usually weak, sometimes strong; the hind femora not infrequently moderately or much thickened, the hind tibia; not rarely arcuated and compressed, metatarsi rather long, coxie short ; the hind coxa*, femora, and tibia-. more especially in the male, in not a few species, armed with spurs, pro tuberances, or spines; the front and middle tibia' and tarsi rarely flat- tened, or with structural variation. Macrochaette rarely present in any * Soiiietimos absent in Chri/HOftasfer, VoluccUo, etc JM. leiitly with a aiul Pter SYNOPSIS OF NORTH AMERICAN SYKPIIIIU: XXVII £ head, sec- >r crosK-vein tudinal vein EKIA Fabr. the frontal "part of t\w body; the boiuen, or half oi)en; thii'd louf-i |tndinal vein never forked, fre(|uently with a more or less deep eiirva- Iture on the outer ]iait; uuu'fjinal eell opened or closed, the fourth vein -terminates in the third vein at or before the tip: neither of the inter- calary veins jjresent ; anal eell always closed before the border of the wiufi'; anterior cross-vein before or beyond the middle of the dis(!al cell ; ht ween the third and fourth loiit/itndinal reins and nearly parallel with itheiii there iv a false or .sinirimH rein, nearly always i)resent, and char- acteristic of the family. Unal veins;* : basal eel In I lower parr, itely broad, e under the ity near the ges, iisuallv ral openiii;: projectinji. me jointed : eut. Front !ss elongate it, appro xi lly of varied ►are or pin irovided at in the luak' elli. Ocelli moderately ■cent, rarely ioraen com- Hypopy lie; slender, iCgs usually moderately lompressed. and tibia', spurs, pro rarely flat- sent in any 4 I TABLK FOR THE DETERMINATION OF GENERA. Anteniiio witli a, teiiiiiaal style 2 Auteiiiiii' with a dorsal l)rist]e 3 Autcniiii' cyliiHlrical, tirst two Joints t'loiifjate Ceria, "jrii^ First two joints short, third compressed (plate iv, tiy. 14) . Pelecocera, 110 Marj^inal fell of the wing closed and petiolate 38 Marginal cell open 4 4. — Anterior cross-vein ot" the wing distinctly before the middle of the diseiil cell, nsii.iliy rectangular 5 Anterior cross- vein ending near or beyond the middle of the discal cell usually oblique 43 * 5. — AnteniiiB elongate 6 Antennie short • 11 6. — Dorsum of thorax without yellow lateral stripes 7 Dorsum of thorax with yellow lateral stripes; large sjjccies (plate i, lig. ')) Chrysotoxum. K! 7. — Face rounded, pilose, not tnbercnlate, oral margin not ]irojectiug .... 8 Face not evenly arched ; tnberculate, or the oral margin projecting . . . 9 8. — Large species; scntellnm llottened, usually with spines or tubercles; a stumj* of vein in the first ])osterior cell from the third longitudinal vein (jilate i, figs. l-;i) Microdon, :? Small species; scntellnm without points; no such projecting sttinij) (plate ii, tig. 1) Pipiza, 22 9. — Body clothiMl with sparse tomentuni ; all the femora thickened and with a row of short spines below (see. also, J/v((»/ey)/rt s/riflff/a/rt) , . Lepromyia, :<1 Body not toinentose ; ;ill tlu' femora not thickened and not with spines below lO lO.— Face tubennilate below, partly or wholly yellow : cpisloma receding; fa<;(i and front not wrinkled (plate i, ligs. 7-i.t) Paragus, 17 Epistoma projecting ; front and face with transver.se wrinkles (plate ii, tigs. G-9) Chrysogaster, :il 11.— Face black in ground color 12 Face more or less yellow in ground color 20 12. — AbdoUKMi with only four visible segments; first two joints of thi' antennie very short, third large, 8ublo|i- lie and wi'lia facial tiiltort'lc (plati' v, li^.s. 1-'^; . . . Myiolepta. I'.'T 15.--L|iiNiiiiii:i ini.jcci iiijr I small lilark .s|iccic.s IG Face liilM-rciilaic, the oral maij^iii not iu'dJiMliii;^ 17 r'acc I'oiiiiilcil, ]iil(isc, not tiil)ciciilaic, the (ir.il mar;;iii not inojci (iiiM- (plate ii. li;,',s. 2-')) Pipiza. •-",' 16. — Front in (imalc, and llic lace in liotli sexes usually, willi liaiisv eise \vi Inkli > (plate ii, Ii;;. lO) Chrysogaster, .'A I'ace and I'lont not wiink ed; Caei' pilose, willioiii lulienle . Psilota, ^d 17. — Metallic ^Teen, metallie ;;ieen and ldaallds ; alxloiiien ii.siially elon;;ate 18 18. — A\'iii};.s not lony;er ilian the ahdoiniii : oielhir tnherele lar;;e: ahdomiMi de- pressed, loiii; ellipl i<'al, Honii'W hat narrowed toward the hase, the li;;litei !narkiii;is t'errii;;iiii>nK or orani^e-yellow (plate iii, A'^. l:i) PyropliEeiia, Til Wines loii;;cr tli.'in the alMlomeii, usually iikmc slender species, ahdoniiiial eros> liand.s yellow or ;;reenish yellow, or sometimes shiiiin;;' metallic . . 19 19.— i'lont tiliiie, distall\, and tar.si of the male dililled, those of the female a littli widened (idate iii, li^s. K'-l-J) Platychiriis. .M Front tilda' and till --i slender in hot li ."^exes Melanostonia, H 20. — Doisiim of thorax with yellow lateral stripes 29 DiHsiim of thorax not with yellow lateral stripes 21 21. — Ahdoinen narrowed toward the hase, in outline eliih shaped or sp.it iilate . 22 Al)domen oval or slender, not s|iatiiliite or cliili-shaped 24 22 — Hind femora Nieiioer; ahdfeiien e!ciii;i.'iie, .--lender toward the hase; front of \'v- iiial lone-, narrow ah"ve(plale iv. ti^fs. 7-'.)) Baccha, I h Hind femor.i thickened 23 23. — Fijistoina jiiodiKed anterioii\, in prolile deeply concave from aiitelime to ora! m;ir;;iii ; third Joint of aiiteiuM' ro undid ( plate iv, fij^s. 11, l-.i Sphegina, II: Ei)iHfove; fourth sei,niii ill of ahdi liicii with two incdiaii \e!low --iripes an.l ai. oliliqiie side spot Ailograpta, '.' i:v 31. -F., lai 32 -Ah< Thi 83 dlii Mil 84. -Spe Ula 85. --Sell 86. 87. 88. 89 40. ♦1 42. 43. 44 45. 46. *'• #8 49. 80. -Fa. Fac -Kpi Kjii -Thi Thii -Alls Ari.- -Kin lliii - Fioi I'roi -Tho: Thoi -Arts' Aris -Thii Thic -Thir Thir -F,ir( F KV -Tlioi Sent Tiiii Thir -Thic Tiiiii -IlilKi liini] I'M. iv. n-. 14) ilcomyia, I'-itl mules liiii(>|)- 81. [yiolepta. 1,'T . ... 16 82, . . . . 17 ■ tin;;- ( pliili' ii. Pipiza. ,;•.' 83 .t'l'st' wiliiUli > ysogaBtei-, .U 84. . Psilota, :ii' (11 85. liwi.sll i|ll lie . . 19 38. I'oiniilc a lit til latychiruB, .M^ gg, lanostoma, V . ... 29 40. . . . . 21 ; Mtiilali' . 22 . . . . 24 |l. ic ; IVoiit ol" If- M Baccha, lit | . ... 23 42, iteniia; ti> iil;i phegina, II ; tliinl joint c: Neoascia, 1! 43, ... 25 ... 32 44 Syritta, '-.i ... 26 45 liiiL;; to^^ci Iiii r-liall as Ion.. Enpeodes. ( 46 lliinl or oiii ... 2: aliovi' (|ila!' 4"^ atabomba. i- ... 28 ■; (islcrior ccli J|q Didca, '1 m Syrphus, *<• is e.-iogiapta, '. " * . . . 3C 80 lilt 111 of alidi t. ilograpta, '.' SYNOPSIS OF NORTH AMEHICAN SYRI'lIIUyK. XXIX KycH of iiialf not with an iura of cnlarjicd facets aliovr ; fourth iilMloniin!>l st-ij- iiDMit not so iiiai'kol 31 — I'iici- project iny lirlow ; .slender .species (plate iv, Ii;;. lii) . Spliaeroplioiia. HU I'ace lecediii!.; Iielow ; adoiiien oval, at least not slender Xauthogramma, '.M — .Midonicn oval, hlack, liasal i>orlioii I ij^lit -colored ; thickly pilose specii's (plate iii. Ii;r. (■,) Leucozoua, (il 'I'liiiily pilose species, not so marked 33 -Hind feinoi-.i lliickeiied 34 lliiid t'i'iiiora slender 37 — Species \vlioll.\ or .■sciitellnm not nnnsiially larnf, considerahly liroailcr .at the liase; <'yes of m,".le lioli.pt ic Myiolepta, Vi7 — I'ace carinate ; alidomcn oval (plate v, lilt's. .'i-T ) Brachyopa, 1">1 I'ace jirodlieed, (d)tilsely tilherciilate (plate \. Iii;-. 1) . . Ellgeiiiamyia. MO — l",))istoiii.'i itroiliiced into a loii^ l)orr('eled snout (iihito v, li^. I!) . Rhingia. I'Jl* l",))istoma not at all jirodiiced. (See, also, llacrha, IK!.) .... Cliilosia. '-'S — Third lon;iitudiiial vein heiit deeply into tli(^ tirst posterior cell .... 40 Third vein not deeply lieiit into the lirst posterior cell ; antenna' el(Mi;,'ate , 39 -.\tistii featliery pliimo.se (platt< vi) Volucella, Kll Arista very densely i)liimose, apjieariii.t; like a solid mass Copestylum. I."il — Hind feiiKU'a wiili sharp tooih-liki' ]trojection Iielow near the outer end : laii^e species (plate xii. (i;;, "J) . . Mile.sia. 'Jo I Hind femora without tooth-like project ion Iielow 41 — I'lontal trianj;'*-' of male stroii;jly protuticrant (plate viii, li^. 1^) Doliosyiphus, 1T.~ Fronfal triangle not protuherant 42 — Thora.K with distinct yi How niarkiii;;s : femora thiidvi'iied: hyiiopyuiimi lari;e ()ilate vii, liii. 1) Pteroptila, IT'.» Thorax without distinct ycllou' markings ; hind leiiioi'a occasionally t hickened : liy]iopy;;iiim not prominent ErLstalis. I.i-^ — .\rista plumose (jihitc^ vii, li^s. ",'-.)) 44 .\risla hart) or iniliesceiit 45 — riiinly ]iiloM', aliilotiien with ytdlow hands Sericomyia, l."i:! 'I'hickly ]>iIose, ahiliimen without yi'llow Arctophila, l.'>7 — 'I'liird lon^itiitlinal vein bent ileei»ly into tlio lirst iiosteiioi' cidl : hind leiiiora thickenetl 46 Third vein only ;;i'iil ly ciirvetl 51 -i'.ii-c with a sharp loii.u;itudinal ritl;;-e in the midille : hi ml renioia with an an;;ii- lar prol ulierance lich^w near outer end Tropidia. ■.'Hii I' ICC ; uliertiilate or archetl, not carinate 47 -Iliiii.ix and sciiteliliiu \t'ry deiisi.ly poliinose aho\f (pl.ite viii, lii;. '.ii. PteialJafitos. I'.i- .■siutellilin not ileiisely ]M)llinose aliove 40 — Tiiiitl joini of aiileiina' hroatl. thor.ax iitit vitiate 49 'iliird joint ov.il; thorax usually vil l.ittr al")ve Helcpliilna. l-i! — Thickly pilost; Mallota. •Jiii Tliinly pilose 50 — llinil tiliia' of ni.'ilc with an internal niedian spur (plaie \ lii, li.Lt 1-) Teiichocnemis, !',);• lliml tibia' of mule ntit with an internal mtttlian spur (plate ix, II.l;. I 1 Tiiodoata. 'Ji:,'. i XXX niTLF.iyriN :(i, unitcd states natioxai. mi'si:i:m. 51--lliiiil fi'inoni tliicloMicd, witli ii hiliil simr l)(:l(»\v on (inter cinl, dilate xi, liji. 1). Senogaster, 'j:!>^ Hind t'cniiiiM not with a liilld N|int' liclciw 52 52.— SlfiidiT s]n'(Mi's, aliddiiicn naniiwcd (111 liasiil portion Baccba, llii Alidonii-n in no \v\sv. cliib-Hliaiird or narrowed liaxally S3 53 -'I'liorax Willi distinct yellow niarliin;is otiier tiian on the Imnieii ... 62 Thorax not willi distinct yellow iiiarkin;;s olliei- tlian rarely on tliH linnieri 54 54. — I'.ice traiisvcrHcly arched or carinate, not iiroduced, not tnlierenluto ; tilidouien more or less elon;;ate ami nearly hare 55 Mor-6) Xylota, '2iA 57. -Sculellnni, niarj^in of the thorax, and the pleura' with bristly hairs (plate xi, (ij;. r>) Chrysocblamys, '240 Thorax wholly without bristles 58 58. — Taco short, not produced, concave IVoin anteniiie to tip, imt tnbercnlate ; hind t'enioia thickened 59 Face jiroduccd, lonj;er than the front 60 59.— Abdomen elonj^ato BrachypalpuB, M'il Abdomen very broatl, thorax densely jiilose, very lar;.;e species (plate x, lij;. 7) Pocota, ii-2ii 60.— Faco produced forward, pointed, concave from antenna; to tip, not tiibereulate, sub-carinate ; hiiul femora thickened (plate x. Iii;s. 4-(t) . Crioprora, :i!lT Face not evenly concave, tnbercnlate or convi'X 61 61. — 'I'liird joint of niiteuine jiroduccd above into a coiiii'al process, terminating in the thickened arista (plate xi, lij;. "J) Merapioidus, '.J4:' Third, joint of antenme obliiim-ly oval : hind femora rarely thickened* (plates ix, x) Criorhina, "JCH 62. — Mind femora with a conical, toofh-Iike )irutnberancc below, near the end (plate xii, fiKs. Ii-')) Spilomyia, "J-'l Hind femora without smdi protnberance 63 63. — Antenna' insc^rted low down, near the middle of tlie head in iirotilc; face nor lonner than the front (\ilatc xii, tigs. (i-T) Temiiostoma, 24'.i Antcnme situated hi};li up, on a conical jii'ocess, front short, face much produced downward ; antenna; loni; or short (plate xii, lijj. 8) . Sphecomyia, '2iiS * If thinly jiilose, with the aluhinKMi nearly bare, and the bind femora thickened, see Xyluta tiibminn, p. '2^7y. $ I 1 :i;m. it(> xi, Wii. 1). enogaster, 'j:!8 .... 52 Baccha, llii .... 53 ... 62 liH liuiiu'ii 54 lute ; iilidomt'ii .... 55 .... 57 iiiii'il platii X, lijr. 7) Pocota, t,>:ii) >t lubercnlatc, 3rioprora, 217 . ... 61 erininatiiif^ in rapioidus, 24;i t'licd* (jilatcs Criorhina, 2C/ii/a Wit'di'iimim. Aiiss. Z\v. Ins., 11,71), IBItO. ^)\mrr(lKpU'S^'^\\\u\n, Knt. Ma^;., v, :!72, IHll". McKophila Walker, List -tc, iv, ll.%7, 1H4//i/a/H»cy>e«/iis Walker, List, etc., iv, 1157. Habiiat.—Yh'f^unw, Floridii!,* Texas (O. S.). $ . Lcngtli, 0 to 8""". Heiul ftTiugiiions red, clotlietl with yellowish white i>il(' ; in prolile yeiitly j^ibbose on the lower jKirt of the lace. Front broad, the distance from tlu> ocelli to antenine a little less than the least distance between the eyes ; ocelli approximate. Antenna-i red, elongate, the tirst Joint considerably shorter than the two following to- getlier; second joint short; third joint a little longer than the first, ob- tuse at the tip, brownish on the distal j)art. Thorax red, the dorsum with three broad black stripes, tiie lateral ones abbreviated in front ; clotlied with short, Mglit yellow i)ile. S(!Utellnm large, plane, trapezoi- dal in shape, the length of the distal border not as great as the sides; very distinctly emarginate, the i)ile rather shorter than on the thorax. Abdomen sluu't, broad, j'lobose, brownish red, the ])ile siiort, light yel- low. Legs red, the femora, except the tip, and sometimes a ring on the tibia', and the hind metatarsi, black ; hind metatarsi longer than the re maiiiing joints together, extraordinarily thickened and dilated. V/ing.s tinged with bhickish, especially in front and along the cross-veins; the sections of veins at outer part of tirst posterior ami discal cells nearly straight .mkI rectangular, somewhat deflected inward. Tiiree specimens, Virginia (T. Pergande), and Florida (Professor Kile> ). The ; tab. i, lig. 4. Dimernnpis j)oda""". Antenme red, somewhat blackish at the tip, the tirst joint a little shorter than the two following together; second joint not half as long as third; third joint . ^nted at the tip Face thickly clothed with white i»ile; lY:;nt in the male narrowed neai its middle so that the distance from the ocelli to the antenna', is about #ons twice the width; ocelli apj)r(?ximate ; front in female as wide as the distance from ocelli to the antenme. The color of the head is red; in profile the face is nearly paiallel with the border of the eyes. Eyesi * Habitats followed by an ! are given from specimens examined. SYNOPSIS OF NORTH AMERICAN SYRPIIID.E. li yellowish »t' the iace. le less than itenna^ red, )lk)\viii}jt to- he first, oh- the dorsum (I ill front ; le, trapezoi- s the sidt'S ; the thorax. i-t, light yel- ring" on the than the re ed. Wings s-veins; the eells nearly a (Professor rownish red ^Macquart's tion on the icter is that on from Fabri- llli, lig. 24 . iliish at the ig together: at the tip i-rowed near ma' is about wide as tlio is red ; in eyes. Eyes ued. [bare. Thorax red, with three broad, indistinct, blackish strii)es. Sen- [tellnin large, plane, trapezoidal in shape, the three sides nearly equal ; [wholly without spines or tubercles ; pile short, reddish, not longer than 'on the dorsum of the thorax. Abdomen very short and broad, globose, brownish-red, the pile very short and whitish. Legs red, the femora more or less blackish ; hind metatarsi longer than the three following joints together, very much dilated in the male. Wings brown along tiie front part and along the veins of the posterior part ; veins at the outer part of the first posterior cell and discal cell nearly rectangular, not rounded on the posterior angles. Numerous specimens. Microdon pulcher, n. sp. Habitat. — Saint Domingo !. 9 . Length, 12'"™. Eys bare. Face nearly parallel iu profile with the border of the eyes, shinii:g black with a purple reflection, clothed with not very abundant white pile. Antennae black, the first joint not quite so long as the two others together, second joint short, not a fourth as long as tiie third ; arista shorter than the joint. Front deep shining purplish black, with short black [tile. Thorax deep shining black, with a jmrple or violet reflection ; pile short, black. Scutellum transverse, pot half as long as broad, spines small and inconspicuous, remote from each other ; pile longer than on the dorsum of the thorax, nearly white. The color of scutellum and the abdomen bright purple; third segment of the latter on the sides rather narrowly, fourth segment broadly, fifth segment wholly, orange yellow, and clothed with the same colored pile; elsewhere tlie abdomen is clothed only with short black pile. Legs black, the last joint of all the tarsi yellowish red ; all the tarsi flattened transversely, the posterior metatarsi only a little thicker. Wings dark brown, the interior of outer cells subhyaline ; the last section ot tiie veins at outer part of the first posterior and discal cells angulated and with stumps of veins. Two specimens, Saint Domingo (G. F. Frazar). Microdou baliopterus. (riato I, lif?. 4.) Alicrodoii bdlioplerKU Loew, Ceiitur., x, 56. lla bi tat. —TiiXi\» (Lw.) !. 6,9. Belongs aiiiong tht; species with slender body and short anteniiie ; fuscous bron/e, modeiiitely shining ; front, thorax, and scu- ^llum cu[»reous sliining, abdomen greenish bronze in color, toward the iides becoming coiipery ; antenuie and legs testaceous, third joint of the former, and the basal half of the femora nearly wholly black fus- ions; wings hyaline, veins usually broadly clouded with fuscous black, length (>f body, 8 to 9"""; of wings, (j to 7""". Kelated to M.ioan't<(tiiN, and Icvtus; fuscous bronze, moderately shin- ing. Front resplendent coppery, clothed with light yellow pile; lace ind occiput white pubescent. Eyes sub-uuery stripes. Scutellum greenish black, the apex emarginate and on each side pro- vided with a black tooth. Abdomen in the male cylindrical, obtuse, in the female acute ; second segment a little broader than the following, the disk dei)ressed. with the lateral margins somewhat tumid. Wing.s cinereous hyaline, the transverse veins clouded with black, posterior angle of the first posterior and discal cells rounded, very shortly ap- pendiculate. Translation from the original, compared with the two type specimens in the Museum of Comparative Zoology. Microdon tristia. (Plato I, figs. :5,3rt.) Microdon Iriatifi Loow, Centnr., v, 45. Microdon cothurnatum Bigot, Auii. Soc. Ent. Fr., 1883, 320 (var.). Habitat. — Virginia, New York, and northward as far as the Mac- kenzie River (O. S.), Connecticut, Oregon !. $ . Black, i)allidly pilose, the antennie long and fuscous black, front very broad, scutellum bidentate, abnd and third segments yellow ; fourth elongate, black. Legs luteous yellow, the femora chiefly black; hind metatarsi elongate, somewhat thickened, scarcely dilated. Wings dark brown, less so behind. Cross-veins much inflected, sinuous, but without stumps. ,g, One speciiueu, Georgia (National Museum, Professor Riley's collec- tion). A female si)ecimeu from Texas ditters in having the abdomen , broadly oval, and nearly uniformly brown, the anterior segments lute- ous in the middle. Microdon falcatus, n. sp. Habitat. — Mexico ! 9 . Length, o"""'. Head flattened, vertex projecting, front descend- ing. Front and face reddish yellow, shining, nearly bare. Antennae elongate, black; first joint slender, second short, third longer than the first two together, thickened, curved falcate. Eyes bare. Thorax yel- lowish red, nearly bare; dorsum with three coalescent, black stripes, the outer ones abbreviated in front and behind, the middle one behind ; (Scutellum very slightly emarginate bebind. Abdomen red or brownish red, i>aler toward the base, very broadly oval, depresvsed, nearly bare. Legs black; hind tarsi scarcely dilated. Wings cinereous hj'aline, Ktrongly i)ubes(!eut; the veins stout, nearly black; last section of the fourth vein inflected, posterior cross- vein sinuous. Four specimens, Isthmus of Tehuantepec (National Museum, Pro- fessor Riley's collection.) Microdon aurifez. Microdon aiirifcx Wiedemann, Ansa. Z\v. Ins., ii, 85 ; Macquart, Dipt. £xnt., ',, <<, 11,2, tiili. ii, lijr. -J. ? Microdon trochiJita Walker, Dipt. Saunders , 216. i/«i»(7«f.— Mexico!, Brazil (Wied.). (J. Length, 10">™. Bright metallic green with violaceous reflections; tip of the abdomen yellow; legs black. Antennas blackish brown, first and third joints of nearly equal length. Face rather narrow, mod- erately swollen, white pilose. Front with black pile, considerably nar- fowed in the middle, where its breadth is less than half the distance between antennsB and ocelli. Eyes sparsely pilose. Dorsum of thorax |rith moderately abundant erect black pile ; in front and on the sides, With sparse, light yellow pile. Scutellum large, trapezoidal, covered With light yellow pile; spines small and remote. Abdomen less viola- ceous than the thorax, nearly bare; first segment with yellow pile; sec- tod with an anterior opaque black cross-band; hypopygium wholly teddisli yellow, not shining. Legs black, with a greenish reflection, es- pecially on the hind pair ; pile black, rather long, fringed on tln^ outer 8ipendiculate. — Translation. The figure represents the last section of the fourth vein as straight and rectangular, the posterior angle a little acute and appendiculate. 'I I M II H I ADDITIONAL NORTH AMERICAN SPECIES. Microdon iuaequalis Lotuv, Coutnr., vii, 70. — Cuba. Microdon laetus Loow , Contm-., v. 4(5.— Cuba. Microdon gracilis Bigot, AiinalesSoc. Eiit. dt) Franco, IHSJ, ;i20. — Mexico. IChiimophUa »pUndena Macquart, Hist. Nat. Dipt., i.lWi, pi. xi, fig. M; Dipt. Exot., ii, 2, 10, 2, 1)1. i, lig. 2.— Phila. "Mr. Bigot, in whose possession the typical si)ecimeu of Macquart'6 description now is, makes the following statement about it (Annales Soc. Ent. de France, 185S, p. .590); 'The head of this specimen is glued JM. brownish.-- 18 of Fabri SYNOPSIS OF NORTH AMKIilCAN SVIU'IIIDE. Id I Oil, iiiul resoiiibk'.s that of Conops, wliiU' tlu' body is that of tin I'xotio ]\Iit;ro(h)n.' Wo may with safety, t htMC tore, *st like out the j;eiius and 8i)e, il: 14 BULLETIN 31, UNITED STATES NATIONAL Ml'SEUM. (lesc'iibo. The lengths of the juiits of the iuitentiie offer ehariicteiK of i^^, ^f Home Viihie, hut I feel sure thiit they are not so reliable a.s some authorn gecond have .supposed. In a ratlier large series of speciinciis, all apparently forniiu belonging to the same species, I find a very considerable variation in Qf ^y^ the lengtli of the third joint, as will be seen in figure oa, plate I. ^^ ^\■^^ TABLE OF SrECIES. '^'^^^ > Til re 1, — The liitisral marfjin of the third al>(li>iiiiiiiil Ht'';iiicnt y«!llo\v 2 Tho liitcnil margin not, yeUow 3 Chrysol 2. — The liliiek on the tifth abdominal Hegineiit in shapt'd like an inverted V. laterale CV The hlaek has the two posterior branches arcnate, and widely se])arated at tlH> Jfnhi tips ypsilon « ^ 3. — Arcuate bands ot abdomen caitire ; the black spot on the fifth segment is <'loii- \ gated and narrow, with the branches Jiearly parallel .... integre sue nrs Arcuate bands interrupted 4 tOgCthe 4. — Eastern species 5 thorax i Western species derivatum Scutelll 5. — Black s[)()t of the fifth abdominal segment inverted Y-shaped . . veiitricoBuni nmdj.rtii Black spot, etc., inverted V-shaped pubescens . ineiitsc( Chrysotoxum laterale. ' Mrior st CliriiHoloxKm laterale hoevr, Centnr., v, 42. Mgllienl //rt&<7rtf.— New York !, Nebraska (Lw.). Wackfo i . Length, 11""". Second joint of antennae a little longer than the ; ' '* -^ first; tliird joint a little longer tliati the first two together; eyes pilose. _ **^ *^ Lateral stripes of the thorax sub-entire: the white vittulie conspicu- ■^' ^^' J_ I'fill ^l ons. Scutelluin yellow, the disk black fasciolate. Yellow fasciic of the j . , ^ abdomen arcuate, very narrowly interrupted, connected with the yel- low border of the lateral margins; posterior margin of each segment Ohrysoto yellow; on the 'first' segment narrowly, on the third broadly, on the '*'". fourth strongly dilated, on the fifth produced into an oblong spot, so HabiU that between this spot and the fascia the black forms an inverted Y, 9. Ej Ilypopygium yellow. Bach of the middle segments of the venter with fasciae of narrow abbreviated yellow fascia on the posterior nsargin. Legs wholly siibsej)at yellow. Wings cinereous hyaline, costa with a narrow fuscous cloud of femora, i equal width. From G. derivatum Walker, to which this is nearly re XO™'" ; of lated, it will be easily distinguished by the thoracic stripes being broader, Third . by the margin of the abdomen being yellow, by the picture of the I^es j)il venter being difi'erent, and by the legs being wholly yellow. — Transla' wholly j tion. utely arc A single female from New York (August 25) I identify as this, but the margins, first segment of the abdomen does not have a posterior yellow margin, spot in i the first Chrysotoxum ypsUon, n. sp. bauds of Habitat. — New Mexico!. into a tri $ . Length, 10 to 12""". Large. Third joint of the antenufe longei x/^gimpef than the other two together. Scutellum on iis disk dark and translu fagcia on cent. Arcuate bauds of abdomen rather broad, connected with the yel w \ M. SYNOPSIS OF NORTH AMERICAN SYRPHIDiE. 15 riraetoiM of ^^y (,f ^]^^ posterior iniirf^in behiml. Murf^iu of the abdomen Irom the me authors gecoiid segment yellow ; the blaek spot on tlie tifth sefjnient is sh'n«ler, apparently formin}^ three arms; the basal one is short, formed by the interruption ariation in ©f th'^ areuate ban08terior are curved outwardly, so that the distance between the tips is about the same as the length of each, Lej,'s yellow. Wings with a narrow brown border in front. Three specimens, New Mexico (G. F. Guuraer), from Mr. Eugene Keen. ,te I. .... 2 .... 3 1 V. later ale lariitt'il at llie . . ypsilon ;ment, is dttn- . . integie .... 4 .... 5 derivatum ventricoBum pubescena ger than the eyes pilosi'. Ire conspicu- ■asciieof the th the yel ach segJiieiit adly, on the )ng spot, sn inverted Y, Chrysotoxum pubescens. Crjiaotuxiim puhenvenH Lin'W, Wicii. Eiit. MouatHchr., iv. 84; Ct'iitiir., v. 43. Habitat, — Illinois (Lw.), New York!. (J , $ . Length, lU-o"""'. Second joint of the antennse longer than the first; the thiril Joint in the female subequal to the two preceding together; in the male longer. Eyes pilose. Lateral stripes of the thorax interrupted; the median vittulae conspicuously whitish pollinose. Scutellum yellow, the disk black. The yellow fasci.'e of the abdomen of moderate width, arcuate, interrupted, on the posterior angles of the seg- ments connected with the posterior bands; these hind marginsonthe pos- teri(»r segments are broader than on the anterior segntents, on the last segment dilated into a triangular spot between which and tiie fascia the black forms an inverted V. Vt-nter black, posterior margin of the seg- ments yellow ; the two intermediate in the male, the last three .segments ill the female, each with two ovate yellow spots. Uypopygium yellow. Legs yellow. Wings cinereous ; near the costa, lutescent. Translation, compared with the types. Specimens agreeing with this I have seen from New York. Ohrysotoxum ventricosum. L'hrysoloxum ventricosum Loew, Ceiitiir., v, 44. Habitat. — District of Columbia (Lw.), Canada! 9 . Eyes pubescent, scutellum wholly yellow, abdomen globose, with ! venter with fascite of moderate width, modera,tely arcuated, narrowly separated or Legs wholly Hnbseparated from the lateral margin ; base of the front and middle cons (!loudof femora, and the hitid femora except the tip, black. Length of body, is nearly re^ 10"'" ; of the wings, 10.5'""'. iing broader, Third Joint of the antenntB a little longer than the other two together, cture of the I^es ))ilose. Lateral stripes of the thorax interrupted Scutellum w. Transla wholly yellow. Abdomen globose, fasciai of moderate width, moder- ately arcuate, narrowly interrupted, usually separated from the lateral thi.s, but tbe margins, and from the i)osterior nmrgin, sometimes, by the luteous How margin, spot in the posterior angles, joined with them; posterior margin of the first segment with a narrow yellow band, or without it ; posterior bauds of the remaining segments of moderate width, the last dilated into a triangular spot, separated from the fascia by a black, inverted tenuse longei y^ehaped spot. Last three segments of the venter each with a yellow and translu fascia on the posterior margin. Legs yellow ; base of the front and with the yel le nur.LiyriN 31, united states national muskim. I , '. "I ^'1 niiddk' fl'morii, and llic liiml fi'iiioni oxcopt tlio tip, bliick. Wijigs cinfn'otis, iiloii;;' tlu' costii fuscous. 6'. centricoHum (Ufl'ers tVoiii C. nrciiati, to wliicli it is nearly allied, in the biisf ot'tlie abtloinen bcin^ black pilose. — Traiishitioii. I liave seen a si)ecinien from (Janaibi which I believe belonfjs liere. Chrysotoxum derivatum. (Pluto I, (i;rH. '>, .'lu, >'iA, Cw.) VhriiHiitiiJHiii lifrii'itlum Wiilknr, Lint, ttic,, iii, 7>Vi. (■hrijHoloj inn rilloMuhim |{i;;s quite to the laten margin, usually slender, mon* or less dilated in the middle; fourth soj; ment similar, but the arcuate band broadly connected at the outf: anjjles with the broad hind marfiin; the posterior band is considerablv widened at the middle, so that between the two bands there is in closed an arcihed, elouffated black stripe; fifth sj'jfment with the yd low in(;losinff an inverted V-shaped spot. In sonui specimens, both male and female, the i)ile on the si terior band more dilated, nearly cutting the black in two ; arcuate bam of the fifth segment entire, shaped like an inverted (J, the yellow of tli posterior margin dilated, forming an elongate narrow stripe, betwee: which and the arcuate band the slender black forms an elongate in verted U. Legs yellow. Wings narrowly brown along the front mar gin. 4' I •.I'M. »ck. Wiiigj I rly iiUit'd, in nwiin here. SYNOPSIS OF NORTf! AMERICAN SYRPHID/K. ADDITIONAL NORTH A.MKKICAN SI'KCIKS. IT [ountsiins (0 o) ii half or ii lack and yel si'parated bv »\v ; the banc t'jjttneiit by ;; TOSH-baiul o: th«i iiiiddlt (III the yellow to the lateiii i; fourth sen at the cute: i considerablv !s there is in with the ye le sidCiS of tlit dofthefourti jargiu. ISfiu' than the firs iuterruptod marfjiu of tli the third so;: gin ; anterio I ill the iniii vex, the i)0> ai'cuate bam yellow of til ripe, betweei elongate in ;he front mai Chrysotoxum u'grita (I'iilir.) Wittlfiiiaim. Auhn. Zw, Iiim., ii, ■«'^, "J.— Jamuicn. SiirphiiM nifirita raliiiciiiH, Kiit. SyMt., iv.'JK'J, ly, Midio nifirita FiiliriciiiM, Synt. Aiitl., 1H:{, 1. Chrysotoxum flavifroua Mnr(|iiiiit, I)ii>t. Kxot., ii, y, 17, i." : tiili. iii, Wg. '.i.— New. foiini». Paraf/iis testaceiis Mcigeii, Sy.st. Bcsclir., iii, ISO, () (var.). I'araiiiin (tiriiat'iH Mi'ifit'ii, I.e., iii, 17i), 3 (var.). Purmjiis pinu:' iilutiiH Zcttcrsti'itt, Diiit. Scand., ii, 850, bonier, ii»i but variiiMi holly black on the 8i«h'> he third sc}; bird segnicii front an«l oi here obscun' t and niiddli -, Hometinie.^ also, there is a black ring on the hind tibite, and the hind metatarsi also bla(;k ; often tlie black is wholly wanting, the legs are then yel- lowisli red witii the tip of the femora and the base of the tibiiu light yelh>w. Wings, nearly hyaline; stigma, dilutely yellow. Ten s])ecin)e"« from Montana (Professor Comstock) ; one from ( Jar- land, ('olo. (Professor lliley); one from Como, Wyo.; two from Wash- ington Territory ; one from Southern California; and four from ( 'ounecti- cut. Tlie species is very variable. In Europe there has been much confusion, as will be seen from the list of synonyms, which I liave re- l)roduced from Schiner. To this author our knowledge of the variations is ciiietly due, and hence the following translation of Ins description and remarks will be valuable ; ''Abdomen black; in the middle in greater or less extent, yellowish re0, 5. I'liiiujun hamorrhoHK Meigeii, Syst. Bcschr., iii, 18'i, 10. I'armjHx iniiim Mcij;en, 1. e., Ls:?, U ; Zottcrstfdt, Dipt. Scaiul., ii, 854, 8. I'ariiijiiH ohncuritu M^gnx, 1. <;., 183, 1'2. I'liniijiix lihialis Mfi^jcn, 1. c, 183, l;! ; ZcttcrstoU, Dipt. Scauil., ii, 852,6. I'drcKlitu fcnioratiiH Mcijrcii, 1. e., I'^t, 14. i I'urnijm lr\angnlifirun ZoftcrHtcdt, Dipt. Si'utid.. ii, 853, 7. * raraijiixxUjUlntux Curtis, Hiit. Eat., ■)t»3. * Fiiuiia AiiBtr. i, a59. tVerh. Z. B. Ges., vii, 301. i' ii S "I 1 1^^ Vf It !■ :1 20 BULLETIN 31, UNITED STATES J^ATIONAL MUSEUM. Paraynx uigriliH fiimincrthal. IjuU. d. iloiu-on, xv, G(W. Faragiis albiptn Giiuiiicrtlial, 1. c. raiagus ilhpar SclimiiiiH'l, Ai'l). ii. Vcrilnd. d. Schl»!.s. Ges., 184'2, 163. Paragus coadunatns Roiidaui, Nnovi Ann. . Habitat. — New Mexico, California, Mexico! 9 . Length, 12"'™. Black, moderately shining, everywhere, except ou legs and venter, covered with whitish pollen, which, when not rubbed, ni oo V\ I' (I ■! I' h BULLETIN 31, UNITED STATES NATIONAL MUSEUM. leaves very numerous, nearly coutifiuous circular black spots, more abundant on the thorax ; on the dorsum of thorax and abdomen the ground color of the moderately shining puuctulate black surface may be in large part denuded. In the middle of the thoracic dorsum is a pair of indistiuct, less pollinose stripes. Antennae wholly yellowish red ; the cheeks and the lower part of the face obscurely yellowish, in ♦he middle of the face below the anteunai there is an oval space which is evenly pollinose, free from the black dots. Wings hyaline, with two conspicuous blackish spots; the larger one beginning in the subcostal cell at tip of auxiliary vein, thence more broadly along the marginal cell, the base of the submarginal cell for a third of its length, and less distinctly opposite this on the cross- vein and base of first posterior cell ; the smaller spot reaching from the tip of the first longitudinal vein nearly to the third ; veins black, brown toward the base. Legs yellow- ish red; the front femora on basal half, and the other femora, except the tips! black; the front and hind tarsi brown. S . Five male s])ecimens have the dorsal stripes more apparent, thert' being three with two others between them less apparent ; the legs are darker, the tarsi blackish; the wings are hyaline, except a small black- ish spot on the stigma reaching across to the third vein. One female, New Mexico (Morrison), and five males, California (Co- quillett). Since writing the above I have received a number of specimens, botli male and female, from Mr. Coquillett, of California, and I And them all agreeing with the males above described. They are all smaller than the type specimen, and differ in the wings having only the one si)ot. instead of two, as in the original female. A male specimen in the Na- tional Museum, from the Isthmus of Tehuan tepee, has the abdomen nar- rower, with coppery reflections where denuded. Both the legs and the spots on the wings are darker than iu the type, and the latter are con- nected through nearly the whole length of the submarginal cell. 1/ < PIPIZA. Pipiza Falleu, Dipt. Suec. Syrpb., 58, 1816. Heringia Rondani, Dipt. Ital. Prodr., i, 53, 1856. Pipizella Rondani, Dipt. Ital. Prodr., ii, 185,1857. Cnemodon Egger, Verli. Zool. Hot. }^os. , x"v, .573, I860. PeniHW Phillipi, Verb. Zool. Hot. ges.,xv, 741, 1865. Dark metallic green, or black, small or moderate-sized species, thinly pilose and finely puuctulate, without yellow or light markings, except on legs and sometimes a basal band on the abdomen. Head as broad or somewhat brosider than the thorax. Antenna} not longer than the head. the third joint rounded, elliptical or a little elongate, the arista basal, bare. Face flattened, receding, transversely arched, without tubercli'. not, or but slightly projecting below, rounded, clothed with pile, uui ^» SYNOPSIS OF NORTH AMERICAN SYRPHID^. 23 )0t8, more [lomeu the irface may orsuui is a yellowish UowisU, lu )ace which 5, with two i subcostal e maigiual h, aiul less iterior cell ; atliual vein legs yellow- ora, except arent, there the legs are imall black- iforuia (Co- iimens, botli lid them all mailer than le one spot, ti iu the i^a- jdomeu nai- egs and the ter are con- cell. tecies, thinly 5s, except on as broad or an the heail. arista basal, :>ut tuberck'. th pile, uui fcrmly metallic green or black. Eyes contiguous in the male, pilose. Thorax short, broad. Scutellum with an acute margin, without tnber- •iWes or spines. Abdomen about three times as long as the thorax, in its ftiiddle as broad ; the segments shallowly grooved transversely. Legs llot verj' strong, the hind femora sometimes a little thickened ; hind me- tatarsi often somewhat thickened, always shorter than the remaining Joints together. Wings rather short and broad; marginal cell open, third vein nearly straight, or gently convex, anterior cross-vein before the middle of the discal cell, first posterior cell briefly or rather long petiolate, the vein at outer part of first posterior and discal cells often Iteut or angulated. Type of genus, P. noctihica, Linn6. TABLE OF SPECIES. l._A1)(lonu'n with a basal intorrupted yellow fascia 2 Abiloiiien uniformly black 3 a.—Vi'^injrs with a brown spot in the middle festiva Winfjs without a brown spot in the middle femoralis .3, — Third joint of antenniE at least twice as long as wide 4 Third Joint scarcely twice us long as wide, or rounded 5 4v— Third joint of antenniB elongate; hind metatarsi much thickened; last section of fourth vein bent near its middle pulchella Third joint elliptical? liind metatarsi but slightly thickened; last section of fourth vein bent at its antepenultimate third pistica a* — Bhtck pilose nigripilosa Chiclly light pilose 6 •^'— V^'ings with a brownish cloud 7 Wings without such cloud piaticoidea 7. — Abdomen chiedy light pilose albipiloaa Abdomen chietly black pilose puella For atlditional species, north of Mexico, see descriptions. P. puhes- 4)ens, P. modeata, P. calcarata, P. salax, P. nigribarba, P. fraiidulenta. ^piza pubescens. TriyljiphuH puhescenB Loow, Centiir., iv, 61. Habitat. — Wisconsin (Lw.)! S . I>lack-green, clothed with rather long dilutely lutescent pile. Hind tibite black pilose; the knees, base of front tibiae, and the tarsi, ^cept the tip and metatarsi of the front and hind pairs, yellowish. Iiength, 4"""'. Black-green, shining, wholly clothed with rather long pile. Pile of the face white ; of the front near the antennae very dilutely lutescent ; on tile angle of the front above, and on tlie vertex, black. Antennae black, rftther long, the third joint oblong, below obscurely reddish. Pile of ^je thorax and scutelln-.! lutescent. Pile of the abdomen lighter than ok the thorax, near the end whitish, on the posterior margins of the jMcond and third segments black. Legs greenish-black, pallidly pilose, Htle hind tibiae black pilose above. Knees and base of front and middle tft>irB dilutely lutescent ; front taroi black, with the first joint fuscous BULLETIN 31, UNITED STATES NATIONAL MUSEUM. II , ,^ nn : f <;xcept its base, second joint dark luteous, middle tarsi dilutely luleous, the third joint subfuscous, tlie last two joints black, hind tarsi blact. •iie metatarsi moderately thickened, their tip and the two followiiif; JL>ints dilutely luteous. Tegulse white. Halteres light yellowish. AViiiys cinereous hyaline ; stigma subfuscous, spurious vein nearly obsolete, ex cept its node. Translation, compared with the type spc-imen in the Cambridge Mu- seum. Pipiza modesta. Trif bind tibite, ely Inteseeiit: joint dilntelr iddle tarsi di joint of biui: iit dilntely In wbite, Hal ^ous. Loew collec face wholly ik, the kncei- lie tibifB, firs; d of the biui nerescent, ex of tlie eye; jntal trian;;lt eddish, tliiic [teral margin; ont tibit©, ex cept a bhickisb ring, ba.sal half and extreme tip of the middle tibiie, first three joints of fi'ont and middle tarsi, and the second and third joints, with the tip of the first of the hind tarsi, luteous; hind coxae armed vitli a slender process, dilated and compressed towiird the end; hind metatarsi a little iinirassate. Wings, except the basal third, cinereons, stigma subfnscons, small cross-vein from the base of thediscal cell, and the last section of the fouj-tb vein from the margin of the wing, less re- mote than in P. nigribarba, P.femoralis, etc. — Translation of original. Type specimen compared. The siugnlar long, slender process on the hind cox.e will at once render the species distinguishable. Pipiza salax. Piljicu aalax Loew, Centur., vi, 39. Habitat. — Pennsylvania (Lw.) ! S . Black-bronze, wbite jiilose ; ♦routal triangle, anterior half of the vertical triangle and posterior margin of the eyes black pilose; antennae black, below red; legs black, the knees, base of front tibiae, the middle tibiic, except a fuscous preapical ring, and the basal joints of the front tarsi, luteous. Wings, except the basal third, luteous cinereous. Length 6.0""" ; of wings 5.5 to O"™. Bliickbronze, moderatel,'"' shining, wbite pilose; eyes clothed with niinute black pile, below with white ])ile ; frontal triangle, and the ver- ticiil triangle, except the posterior xJart, black pilose; antenna) black, below obscurely reddish; third joint oblong ovate; occiput wbite pilose, posterior margin of the eyes black ciliate ; abdomen brietly black pilose, ihe lirst segment, the lateral margins of the remaining segments, the nsuiil metallic spots, and the posterior part of the fourth segment wbite pilose; bypopygium much longer than in other species; legs black, the knees, basal third, or half of the front tibiae, middle tibiae, except a very broad preapical ring, first joint of the front tarsi and first two joints of the middle tarsi, luteous, second joint of the front tarsi usually reddish; bind metatarsi a little thicker than the following joints. Wings cinereous, basal third more purely hyaline, stigma subfuscous. Type si)ecimen compared. Pipiza nigribarba. I'il)i:a iiigriharba Loew, Centur., vi, 40. md'lfat.—^ew York (Lw.) ! S Black-bronze, wbite pilose; frontal triangle and face black pilose j antennae black; legs black, the knees, base of front tibiae, first three joints of middle tarsi and the intermediate joints of front and bind tarsi hiteous, first joint of bind tarsi strongly incrassate ; wings, excei)t the ^sal third, cinereous, the last section of the fourth vein angulated. tiength of body 7™™; of wings (5.5""". Black-bronze, moderately shining, wbite pilose. Eyes thickly clothed with blackish pile; frontal triangle and the anterior half of the verti- cal triangle black pilose. Antennae black ; third joint oblong, on the i^; i' ,'» w\ I i 1- ' \ |! Ki i pen BULLETIN 31, UNITED STATES NATIONAL MUSEUM. inner side near the base obscurely red. Face black pilose, above (ex _|, cept the sides) white pilose. Occiput briefly white pilose, posteridi *«-^!rai margin of the eyes black ciliate ; pile of abdomen bluck, very short ; on j,Q||r„(,gf first segment, and lateral margins of each segment, except the anterior uujp'iy ). angles and the usual metallic spots, with white and longer pile. Hypo •i_'^ ^ pygium short. Legs black ; the extreme base of the hind tibiae, and the basal half of the front pair, luteous ; front tarsi fuscous, ti]) of tlic Wplza fei first Joint, and second joint, luteous, last two joints fuscous black j hind Pipisa metatarsi strongly thickened, black, the extreme tip luteous, the two following joints luteous, last two with the tip of the preceding black; hind tibiui clothed with rather long white i)ile above. Wings, exce|(t the basal third, cinerescent ; stigma subfuscous, the last section of tlic fourth vein broken in an angle. — Translation, conipared with the tyjx' H])ecimen. pilose. Fipiza fraudulenta. Posterioi Pipiza fmndulenla, Loew, Centnr., vi, 41. SeOOud S( Habitat. — Illinois ( Lw.) ! low, at ot i . Black-bronze, with white pile, frontal triangle and the face black aometiint pilose; antennsB b'.ir-k. Legs black; the knees, base of front tibiit, adark lii first three joints of the middle tarsi and the intermediate joints of tlnleilf brow ether tarsi luteous, hind metatarvsi strongly incrassate ; wings, except blttckisli the basal third, cinerescent, last section of the fourth vein bent, not an lutseous. Pipiza Pipha Pipiza Sabita the 00(^11 gulateil. Length of body 0.5""" ; of wings 0"" I give 1 Very similar to P. nigribarba, but the antennoe are wholly black, tlntain that hind tibite with long black, not white, pile above, and the last section catalogut of the fourth vein is bent, not broken into an angle. Type spticimen compared. I doubt the validity of this species. Oaoada. tarsi in h Pigiza pu< 0abitai 'Jf . Lei Wlilte pih Pipiza femoralis. Pipha femoralia Loew Ceutur., vi, 38. ^I'ipicaradicum Riloy, 1st Rep., I'il, fig. 66 ; Amer. Ent., i, 83. Habitat. — Illinois (Lw.) Pennsylvania!. S . Bronze-black, pallidly i)ilose, fascia of the second abdominal seg ^j^i^^. . f.^ meut narrowly interrupted ; tip of femora, the tibiae and tarsi, luteous, ^jj^^mj.jj the tip of the latter more obscure ; wings cinereous hyaline, stigma davkjigjii^g gj^ ochraceous. Length 8'"'" ; of wings 7.5°"". blackish i Bronze black, moderately shining, pallidly i)ilose. Eyes briefly white ^q ^]^q \y l)ilose ; face white pilose. Antenme rather large, two basal joij)ts red jj^ \y\.^^ dish ochraceous, third black, near the base obscurely red; arista black, ti|g|ie ex( pallid near the base. The luteous fascia of the second abdominal se,U|m^ ^jp . meat broad and moderately arcuated, divided by a black line, aiulngjijiy |,, separated from the lateral murgiu by a black border. Pile of the abdo tiig ^.q}^,^. men short, pallid, near the base of the abdomen longer and white, 1h' v^s ate tween the yellow fascia and the posterior margin of the second segment, tjjjj ]iixxi\ black. Femora, except the luteous tip, bronze-black; tibiae luteous, ^jgjjyyitjjj the hind pair near the tip obsoletely annulate with fuscous ; tarsi lute Qne sp( ^ 3UM. e, above (ex- ise, posterior jry short ; (ScliiiU'r)- Pipha luiiata Moi},'t!ii, SyHt. BoHchr., iii, 2i',i, 4 (Schiimr). 'Pipiza artemia Meigen, Syst. B»!8chr., iii, 244, 5 (Schiner). jff^of7>»7rt^— Europe!, Canada? (O. S.) d , 9 . Length, 6 to 10.5'""'. Front and ft ce long white pilose, below the ocelli and about the base of the anLcniifB in the female, blackish pilose. Antenuui brown, third joint trajjczoidal. Thorax white pilose. Posterior part of the second and third abdominal segments black pilose; second segment with a variable yellow band, "sometimes sulphur yel- low, at other times reddish yellow; anterior margin concave or straight ; sometimes interrupted by a distinct blaak space, at other times only by a dark line.'' (Schiner). Legs yellow, with black femora; tibisB more or less brown in the middle. Wings hyaline on the basal half, externally blackish or smoky brown, fading out toward the margin ; stigma dark luteous. f give the description of this species, although it is not known for cer- tain that it occurs in this country, it being given in Osten Sacken's catalogue, with the remark, ''or a species allied to it," n"' occurring in Canada. The European species, P. noctUuca, closely related, has the tarsi in large part black. P^za puella, n. sp. (Plato II, tig. a.) Mabitat. — New Hampshire ! i . Length, G"'"'. Dark bluish black, clothed with light yellowish- wnite pile. Frontal triangle white pilose on upper portion, black pilose below ; face white pilo,se, except near the mouth, where it is black pilose. Aii^.enniB black ; third joint cordate. Eyes blackish pilose, in some ligkts showing luteous ; posterior orbits wholly white ciliate, a little blackish pile at the vertex only. Abdomen with short black pile, except OD tbe broad anterior angles and lateral margins of each segment. L6fs black ; the immediate tip of front and middle femora, the front tibtae, except a broad brownish ring, the middle and hind tibiae at base and tip, and all the tarsi, except the last two joints, yellow. Wings nearly hyaline before the cross-veins, with a distinct brownish cloud at the cross- veins, fading out beyond and behind ; stigma luteous; cross- veins at outer part of first posterior and discal cells nearly parallel with tbe hind border of the wing, the outer posterior angle of first posterior cell with a stump of a vein. One specimen, White Mountains, New Hampshire, August 1. "** 28 BULLETIN 31, UNITED STATES NATIONAL MUSEOI. El !>' , Ir I 1 > \ I .H ) Pipiza pi Habit Pipiza (Peniiim) albipilosa, u. np. Habitat. — Pounsylvania I 9 j^, 9 . Length, 7'"'". Antennae black, the third joint more browni.sli.:i lQ^^,^. ^\ near the base, especially on the inner side, reddish; in shape ol>tu,si ^j|Qm. ^ ])ointed ou the lower anterior part, subcordate, only a little longer tli mjfldiV broad. Head and thorax shining black, with a greenish letlectii ,^g,.f j,„ wholly clothed with nearly white, rather long pile, except Just i<')i HJlDriix the insertion of the antennae where there is a small quantity of 1»1" jjifeni.sli pile. Abdomen shining black, on the jmsterior part of the second n nflt^tjc ,•: third segments with narrow, more dark appearing cross-bands of sin jjn^^ ^ ^^ black pile ; i)ile elsewhere light coloriMl, shorter and less abundant tL f^j^ jj., ,, on the thorax. Legs black, wholly with light colored pile; front iinn^ ^]^^, middle tibije, except a brown ring in the middle, and the hind tibia; anil f\^^, base and end, jvnd all the tarsi, except the last two or three joints (wliifonj froi are brown) luteous. Hind femora considerably thickened, the lii-^ijjgj^ j, metatarsi only slightly so. Wings hyaline on the basal part, distiiic: ji^-o si clouded with brownish across the middle, becoming less strong town the end and posterior nart; stigma jellow ; outer ..nterior angle oft first ])osterior cell acute, briefly petiolate, the cross-veins at outer p of the first posterior and discal cells nearly parallel with the poster border of the wing ; posterior angle of first posterior . llubitat. — ('uiiiit'cticut ! $ . Ii(Mi;;tli, 7.;")""", Antennae black, tlie third Joint yellow along the f brownish. II Jq^j.,. ^j,|j,. j,, .v^iiape oblonfi', more than twice as loiiy as wide. l'a(!e shape obtii>f^jlQlly ^y],j(^^, pilose. Front bbutk pilose below and above, across the tie longei' til mj^,]l,. wiiite jtilose. I']ycs whitish pilose, l)nt vailable in diireient uish rellectii j.0||j»,.fj„„j^^ appearing; bhudcisli. l*ile on the orbits behind white, ept just ahi rpiioj.jiy^ r,^ j^l,,, |„.;i,| .,,„| nbdonien, shininj? metallic black, with a lijrht autity of bl;ig|igg„ji^], n.tlection, moderately lonj,', white pilose. Abdomen white the second ii piloisc, except on the posterior margins of the second and third sejj- -bands of slimQuij,^ where it is very briefly black i)ilose. Lejj;s black, white pilose, abundant tli|;||^ ^ip of all the femora, the rather broad base of the four front tibiie, pile; front iianii the immediate base of the hind tibi.e, the tip of four front tibiie, le hind tibiif and t|,(, hasal joints of tlu'ir tarsi, yellow, the last two joints of the ie joints (wiiifoor front tarsi blackish; hind metatarsi very distinctly thickened, ened, the luWings hyaline, the stigma lifrht yellow, part, distiiif Two sj^'cimens, dune 10, N'ew Haven. * strong t()\v;i ior angle ot't IS at outer \ Piplsa pisticoides, n.sji. Mabifat — White Mountains! ^. Length, (J""". A single specimen taken near the base of Mount ciir th the poster™. . ,.^ . ^ , iitj-.- ii*. , , . .Waohnigton, August 1, resenducs P. pistica verv much, but seems evi- 1 obtuse w i-i 7 <-■ > X •. ; ' ilently .'i"'"'. Shining, gn-eiiish black, clothed with not very e. Pile on .ibnndiiiit nor nearly whiter pile. Front and face wholly white cilia ind t^'^^j ^^^^^ former with a small triangular spot near each orbit, the lat- sli Anteiii®' T^'^'' "' "'i'"row orbital margin, white i)ollinose. Post orbital cilia Ivice 'IS loii"^^^^' ^''^' ^^^^^^ pile of the eyes dark. Face gently convex near the more brown i°^*^^'^'" Antenna' elongate, but shorter than the fa(!e ; the third joint j J , i.jj^, i^^,hree or four times as long as wide, black, the third joint yellowish on the'tin of t^®^^^^'^"' ^''^'^' part. Scutellutn with a slendtu' deep groove before its rinff and t'^*1f^"* Abdomen very short pilose, on the i)osterior part of the second brownish t''°^ third segments black, elsewhere neai'ly white. Legs blaitk, white the under .'i"''i> I'^se and immediate tip of anterior tibia;, h' hind met***'? *'^ hlud tibiai, first two joints of anterior, and the middle two of rior cell slu'™^ tarsi, yellow; hind metatarsi considerably thickened. Wings of the first IK''*'^^^' '^y^^"'*-'; I'lst section of fourth vein angulated in the middle, j,j. yf ^jjg ^yi,i:OSl^rior cro.ss vein rectangular; stigma luteous. Tf 0 specimens, Connecticut, .Massachusetts. The convexity of the lirmount Pai**® '® "°* '^^ strong in one specimen as is figured. ADDITIONAL NORTH AMERICAN SPECIES. Iplaa divisa Walker, Traus. Ent. Soc, N. Ser., iv, 156.— Vera Cruz. 80 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. ►I U PSILOTA. I'Moia MoiK'^n, Sj'Mt. IJcmrlir,, iii, vJo*!, \r^'ii. Small, hliuik, nitlier thickly pilose siiniit's. Eyes pilose, contiyiin in the male. Aiitenme : First two Joints short, third more or less el* ^ated, arista dorsal, basal, bare. Face pilose, the epistoina prodm. forwards. Abdomen short, broad. Hind t'emorii a litth^ thickcih Wiiifjfs as in Myiolrpta; mar;;inal eel! open; anterior cross-vein in ba.se of discal (;ell; third vein nearly si rai};ht; false vein obsolete. 'i,\ of genns /'. anthravina Mei/^ren, Europe. In the type of this jjjenns the fiice is eont^ave from the antenna-, our sinj^le American species the face is convex abov«' and concave low; ♦ne third joint of the antenna* is also more elongate. These i ft^ences are, however, not important enou{j;h to exclude our speciew, I 1 I [1, 1 Uabi 9. I Base (»l iNth bl KBiacI b^low, FsUota buccata. I'ipha hiiir/itd Jliicfinnrt, Dipt. Exot., ii, "i, 107; i>l. xviii, li^. 2. I'lilitla Jlav'id'qnnnk Miic. Habitat. — United States!, Carolina (Mac(i.). $, 5 . Len};th, '< to.S""". Shininj;, metallic greenish black. Ileadsl ing black, front ami face clothed with white i>ile. iVntennte bin ish brown, the second joint deep red or nearly black; not as longuK face. Dorsum of thorax and scutellum in the male clothed with nil iNth tv abundant, erect, somewhat yellowish idle; in the f<'Miale shorter,! I scription of the latter is as follows: C^mbr Psilota flavidipeunis. Puihfd flaridipcnnis Macqnart, Dipt. Exot., iV Suppl., 97 ; pi. v, fig. 5. '"'• Nifjra, Jiavido tomentosa, metatar,so teataceo. AUs JlavidisP " Long. 31. (G"""), S . Face a legcr duvet gris, saillante dans le ba> pen convexe dans lehaut; epistomesaillaut. Front pro6minent. An lies noires ; premier article un peu allonge, troisieme oblong. 1 veins de jaunatre. Thorax d'un noir luisant, a polls jauuatres. 'I Chr Ort, Can Cry i9mall. domen uu peu plus 6troit que dans le P. anthracina, d'uu noir ina WArking genera I i 1 9EUM. SYNOPSIS OF NORTH AMKRICAN SYRPHIDiE. 31 A poils JauntareH; quatri6ino M«'j,'ment liiiHiUit. Pieds noirn; brt.sc t), Cmitiir., v, \\8, lH(i4. ,, Small, black, nearly bare Npeiiies, tlui thorax aid borders of the ab- cross-vein in ^men with sparse squainula'. Iloatl like that of Chrymtiastrr, but obsolete. 1} without faitial or frontal wrinkles ; antenna' elonjjate. Abdinnen short, broad. Anterior cross vein of the \vinBla«!k, rather bare, somewhat shinin;,'. Front plane, a little broader bilow, with a median, subobsolete impressed line, and, on each side, >tlie«l with lilt Ulth two whitish pollinose spots. Antenuie narrow, about e(pial in •lie shorter 1 l^DtJth to the face; tirst two Joints reddish, the second one a little i)ile. Abdoi; UijDy'er than the first, and fuscous on its ui)per part ; third Joint eloiijuate, the female II, blftck, the base bolow reddish ; arista basal, bare, fuscous. Thorax with »ia' and tarsi tife scutellum and pleune thinly but evenly clothed with minute whitish id tibia; is bro; ■^uamuhe. Abdomen plaiu', the sides and tij) wiMi white squainula', si are black luting on the disk. Lejjs black, shininji, somewhat bluish ; base of 11 iVoiit, wit. WiB tibiae and the tirst two joints of the tarsi white; all the femora thickened, armed below with a double series of small spines ; tibiiC sub- olftvate, the hind iiair moderately arcuate. VVinys hyaline, spotted with black. Translation from the original, compared with the type specimen at Obmbridge. See, also, ai>])endix. ose, con ti gill. ire or less el toma pntdiii ttle thicken. e antenna', ind concave ate. These i i our species. \. V. ti^. r>. ack. ITeadsL Anteniiie bhv iotas huigan 111 bridge, lalx es is Pipizd i.btful. The 1. V, fig. & lavldis.^^ te CHRYSOGASTER. Chri/fiogagter Moi\!;en, IIMj-cm-'n Miii?iiziii(!, ii, 'i7\, 1803. Orthom-nra Macqiiiirt, Hist. Nat. Dipt., i, ;'>(;:{, Ih:54. Cam])toncura Kondani, Dipt. Ital. Frodr., ii, li-,j7. Cryptimnra 15i{;<»t. Rpv. ct Majja/. ilc ZdoI., l.-^.VJ. i dans le ba? Eminent. An le oblong. ^ jauuatres. d'uu noir ma OMWkings, excei)* oji the legs, distinctly characterized from all other g€aiera by the front in the female having transverse lateral wrinkles. |3mall, metallic green or blue, or black species, wholly without ye'low 32 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. M iii'M; ! •' ri I'' M .1* 'I ■' !■ il I'' ', !' .^ ' \ • I 'I II ; ! Head hemispherical, rather hirge, broader than tlie tliorax. Antenna not longer than the head, varying, sonietinies the first two joints ven short and the third nearly round, frequently with the third joint eloi gated, as also the second; arista basal, bare. Face in the sexes usuiill; diftereut in i)roflle, in the male generally less concave, the epistoiiii less ju'ojecting, and sonjetiines with a distinct, more or less prominen convexity near tlie middle; in the femah', usually deeply concave ai^ the epistoma salient. Eyes in the male contiguous (in some exotic species bi'oadly sepjifated). Frontal triangle sometimes swollen am with a distin(!t pit-like depression in the middle. Front in the fenial^ with lateral, transverse, irregular wrinkles, in the middle usually a slec derlongltudinal space, smooth, bounded on each side by a linear groov( over the anteniue usually with a transverse arcuate groove, below whic: the space is smooth. Scutellum gently thinned above near its bordci sharp, sometinu's wrinkled on its disk. AbdonuMi short, oval, flattens! the borders, howevei', rounded, not thinned. Legs moderately stroiii; simple, the hind lemora scarcely longer or thicker than the otlit'i> Marginal cell of wings ojien, third vein strainlit, anterior cross-vein cm siderably before the middle of the discal cell, rectangular, the last sn tion of the fourth vein tVecjuentl^ more or less bent, always joining tli thii'd vein considerably belbre its tip, often bent in so that tin; tip is k'< remote from {hi: anterior cross-vein than is the posterior angle of the a! whicli it closes; the cross-vein at outer end of discal cell also joins tli fourth vein considerably before its angle, the false vein frequently ii tirely wanting, never very distinct. .^iy reasons for uniting Orthoneiira with this genus are explicitl enough given by Loew (8tctt. Ent. Zeit., 1843). It is true this authi and Schiller did afterwards make use of Orthoneuya, but that the foriiit did not have a very c'ear idea of the genus is sulliciently shown by li G. nigripen, described in tbt; male as Chrysoijaster and in the female ;. Orthoneura ustulata The character these authors used was the mamit of termination of the fourth vein. TABLE OF SPECIES. 1. — Base and tip of tibiae, or at l«;ist t'nut two joiuts of tarsi, yellow or yellowish re: lastsection of fourth loiif^itiidiiial vein rcctaiiffular ; auteiiutD elongate . Leffs wholly black ; liist section of fourth vein curved or bent 2. — The last section of the fourt!i • ain joins tlio tliird bevond the tip of second vi': rectaiif^nlar, with a stiniip of a vein in the iuid ond ; (lisle of alidonien opaque 3. — Eyes witli linear markings bellui Eyes uuicolorous 4. — Abdomen broadly oval ; wings with brownish clouds plotipeni: Cross veins of wings not clouded pulcheL } lEUM. IX. Autemia vo joints \en inl joint eloii sexes nsni\ll; the epistoii): ?ss proinineii r concave aiii 11 some ex()tv 8 swollen itiii in the fenial nsually a slen linear gioovt e, below wliic. ,ear its bordci ^val, flattens! erately stroii;; un the otliei' cross-vein i;ol r, the last set ays joining tli ht the tip is k'> tngle of the ci! I also joins tli frequently ti are explioitl lie this aut'.i' lat the foMiit sliown by b the female ;. vas the maum or yellowish re: uiic oloiigatc . ;ip of aecond vc: [joint of anti'iii . . . nitic the tip of the > . . . bellu: . . plotipeni . . . pulcheL SYNOPSIS OF NORTH AMERICAN SYRPHID/E. 33 5.— Third joint of iiiitiMiniP nearly rounded 7 Third joint elonj^iite, or :it least twice as long as wide ; lip of fourth vein less remote from anterior eros.s vein than is the posterior angle of the cell in- eluded 6 €.— Third joint of iinteniiie elongate Stigmata Third joint of antenme. short nigrovittata 7. — rront of female lij^hliy rugose lata Front of female strongly rugose nigripes Chiysogasternigripes. (Plate II, ligs. 10, 10a.) ChriiHOijnHtfr nidri/icH Loew, Centnr., iv, till (male). Orthoiieiira iixliildlit I.ocw, ('entur.,ix, 80 (female). ,' Chriino'/dxlcr .tuiilliens Walkrr, List, I'tc., iii, 57"^. I[((bitat. — Connecticnt, Jfew York, New Jersey, North Carolina!. 9,S. Lcngtli, 7 to S""". Eyes niiicolorous. Legs wholly greenish black. Wings a little blaekish, more nearly hyaline neai' the base and posterior ])art, more or less clouded on the onter i)art, especially in the end (►f the marginal, sub-marginal, and tii'st posterior cells; stigma di- Intely browinsh ; the bust section of the fourth vein very oblique, a lit- tle convex outward near the angle, and then more broadly concave, the tip joining the third vein in a right angle. First two joints oi" anti-nnae ▼eiy short, icddish yellow ; the third round or a little oval, reddish yellow, the ui)i)er bolder darker. Head wholly shining, except a broad White dusted cross-band on the ui>j)er ])art of the face just below the antenme 6 . Head metallicbluish green, shining; antennae verysmall. Frontal tiriangle very large, swollen, with a longitudinal deinession. I'ace in protile gently concave, distinctly tuberculate below the nnddle, the epistoma not at all jn'ominent. Dorsum of thorax oi>aque black, with niimci'ous sDiall, greenish, more shining si)ots, which on the sides be- Wme band of dust extends between the eyes immediately below the anteniui' in the middle less distinct. Frontal triangle pitted in the middle, some what swollen, with black pile. Eyes unicolorous, contiguous in th male for a considerable distance. Front in female rugose on the side!«, narrowed above, in the middle with a slender smooth longitudinal space ])orsum of thorax linely ])unctulate, deep green, with four blacki.sl TT- „ V stripes, in some retlections a little copi)ery. Abdomen deep greenisli sub-opaque, tlie margins shining metallic. Legs wholly black, with t greenish cast. Wings with a slightly blackish tint; stigma dark bi'owi, ish; cross vein at outer i)art of discal cell nearly straight, the last se(.ti(ii of the fourth vein bent inward near the middle, the anterior end joiniii; V~ ','"' the third before the tip of the second vein. „.,„. , Six s])e. of the //^,?,/MY.— California!. to the ^ , 9 . Length, (5 to 7""". Antenna:! black, about as long as to the ti; is usual of ei)istonia, the second joint ab(iut one-third as long as the third. F;ii imen w deep shining green, witli delicate stria} on the up])er part, snu)oth lif Clirysog low, with sparse white pile, and a silvery triangle above near the oil)it gently convex, the lower part abruptly and moderately i)roduced dowi nards and forwards. I-'rontal triangle like the face, only slightly swu len, with a distinct ])it in the middle above the antenna'; vertical ti angle greenish black, obtuse in front. Front in female broad, with vc ilisiinet lateral transverse furrows. Dorsum of thorax deep shiiiii: tr i ^ green, with short whitish pubescence. Scutellum distinctly 8'i'<">^' k;*»i Obrysi Bat ^, third lengtl deep c and a epistoi Rtraigl Prontf narrov de!r, lo Dorsui strijx'.s black c metal lii two joi CIn Cri I'iU Ort On 1 before its tip. Abdomen Hat, broadly oval, with delicate white \n\\n- ^,9. cence; the dorsum black with a greenish cast, the sides broadly, n'U-h^j, ^^i V I* BUM. tr of Enroi)e, ;\v described [3SS1U'SS of tilt species, yet it ite the iiiUTit'; ■ation correct, 14. )int uinl upi)H the third oval, w ; on the n\) y white cros> ' the juiteniui', ; uiis broadly, av. the hypopyginin, brassy, much shining; in the single female specimen the brassy color is confined to the sides of the first two segments and the anteri()r angles of the third. Legs shining greenish black. Wings with a distinct blackish tinge, stigma brown, outer posterior angle of first i)Osterior cell rounded or obtu.^ely angulated, usually with a stump of a vein, the tip of fourth vein strongly bent inward. Four specimens. Chrysogaster pulchella, u. h]>. (Plate II, fig. D.) Eabitat. — New Hampshire, Connecticut, Canada! $,9. Length, 4^ to 5""". Antennae yellowish or brownisli red, the tiird joint black, except at the base; second joint less than half the length of the third, the whole antenna about as long as the face. Head deep nietalhc greenish black ; face with delicate stria' on the ui)per half, and a small triangular, silvery spot near the eye on each side above, epistoma considerably protuberant; in the male the face is more nearly 8tKiif,'lit in i)rofilc with a short, rather deep concavity on the lower part, l^ntal triangle not rugose, a little swollen and pitted ; front in female narrowed above, strongly rugose on the sides, in the middle with a slen- deV, longitudinal space, and the lower part, smooth. Eyes unicolorous. Dorsum of thorax strongly metallic, but little sliining, greenish Idassy, delicately roughened, with four coppery, in some rejections purplish, stripes. Pleura* brilliant. Ab. OrtlioiHiira hitrofib/iihica Locw, Cciitur., iv, ,')H, note. Or I hour lira iiilida .Si'binor, Novara Expod. Dipt., :5(W, W; Ostcn Sacliou, Cat. Dii)t., 1-21. M(il>it((t.— New England, Pennsylvania, Virginia, South Carolina, Elttisas!, South America (Schiner). i, f . Length, 4 to .■)""". Head bra.ssy metallic black. Antennae longer than the face, first and second joints yellowish red or brownish, the ■■« !|! I ^■Mii .1 'If (I I',; iil ; i' II [' 111', tJI:; ' I ^1; W 3G BULLETIN 31, UNITED STATES NATIONAL MUSKUM. third black, only ii little longer than the second. Face nif?ose ; concave on the lower part, the epistonia but slightly produced; a small silvery spot on each side near the eye above. Front in female narrow above, strongly transversely rugose, with a median furrowed longitudinal line, Frontal triangle rugose. Eyes with t« median straight horizontal lint and two vertical labyrinthine brown lines. Dorsum of thorax nietallii green, tinely roughened, with four longituilinal stripes of a coi)i>ery (i; metallic purple color, in some retlections brown, the outer ones more n; less divided into two nearly contiguous ones. Scutellum more distinct 1; roughened, or lightly rugose, grooved before the apex- Abdomen dei ; metallic green, roughened, and only a little ohining on the disk, but ili,> tinctly so on the margin and tip. Second and third segments with iiiyi or less distinct (iross bajids of a more oi)aque color in tlont and behiiKi Legs metallic black; knees and base of tibiai and their tip, and h\> two joints of tarsi, reddish yellow. Wings nearly hyaline, witli slendt bliickish spots on the outer cells; stiguni dilutely brownish; a narm brown cloud irom tip of second vein reaching across tlie submargiin; ceil; cross veins narrowly clouded with brown; veins at outer i)aiti discal and first posterior cells rectangular, nearly straight, slightly ;i: gulated in the middle, and with a stumi) of a vein on the inner sidf> tlu fourth vein terminates distinctly beyond the tip of the second. .Numerous s])ecimeus. Dii of th termi Chryc na elongi CODsi( long ii consic anteui broad, ous. four b] termeci moders green-] tarsi re cinereo and do in the t vein at inner si Six s Chtysog C'li Eabii ?. B moderai with well marked lateKii rugosities ; eyes with irregular narrow brov below tr markings. Tlu)rax and scutelliim bright green, scabrous, with ti' I^ugj-jj cojipcry stripes. Abdomen oval, a little darker green, sometimes wr Bronx a bluish cast, opaque, shining on the borders, lightly punctulatc broad o the posterior part of each segmei>t sometimes coppery. Legs bl;i( gjag. jjj ish green, base anove, itiuliual line, nizontal lint orax inetallii II coppery o; ones moic ■>: lon'disitincliy J)(loin*'n cU'i ; . disk, but lii- nits with inoi SYNOPSIS OF NORTH AMERICAN SYRPHID.'E 37 DiflFers from C. nitida, which it closely resembles, in the second joint of the antennae being shorter, the concavity of the face less, and in the termination of the fourth longitudinal vein. Chrysogaster pictipennis. Orthoneura inctlpenim Loew, Centur., iv, 58. £rtZ*?7MY.— Connecticut, New York, New Jersey! . 5,5. Length, 5.5 to 6""". Head metallic bronze-green. AntenusB elongate, black, the first two joints and the base of the third reddish; considerably longer than the face, the third joint not three times as long as the second. Face finely wrinkled in both sexes ; the epistoma considerably and abruptly projecting ; on each side of the base of the antennte near the eye a triangular silvery white spot. Front in female It and neiiim. jj^^jj^^^ markedly rugose, with a slender median furrow. Eyes unicolor- OU8. Dorsum of the thorax moderately shining, finely' punctulate, with fonr bronze-purple stripes, the lateral ones abbreviated in front, the in- termediate ones behind. Scutellum flattened. Disk of the abdomen moderately shining, the margins bronze-green or coppery shining. Legs green-black, the base and tip of the tibijeand the firsttwo joints of the tarsi reddish yellow. Tegulas white, llaltoresdilutely yellowish. Wings cinereous; the discal an f|? , ; f ' \ 38 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. CHILOSIA. ^' OheUoHin Meigcu, Systoni. Roschr., iii, 2%, 1822. CartOKjirphm Bisot, Annsil. Sof. Kiit. dc^ Fninco, 1883, 230. ••.— Se Sc IModt'rately largo to rather small specie^, metallic black, or black 7,_.se green, rather thickly pilose, sometimes almost quite bare. Head hemis ])heri(!al, scarcely broader than tho thorax. Antennai short, small, thin: joint nmiKled or a little oval, never elongate, with a baaal, bare, pnbcv -^i' cent, or i)lnmose arista. Face black or metallic green, rarely sonic ~^ ' what reddish below, thinly pilose or poUinose, or quite bare; a little ,^,,, below the middle with a tubercle, usually thence more sharply conca\v ft— Pu to the sbghtly projecting oral margin; near the eye, with a more or Ics distinct, parallel, slender groove ; in jjrofile the lower part sometiim ^"' ])roilose; faco but slightly coucavo in protile belwai^ds Ii; the antenn.e (,?) occidentaliiQUj^g, ,j Anreiinai yellow; eyes ihinly piloses; face considerably concave below ""' .jhAWl'- temiajC?) (See Appendix.) . . . . hoodiens ^ -"^ " 4.— The laco extends considerably below the eyes; the distance from aiitennie to P^^l^'-*'* of tubercle much greater than thence to lowest part; above the tnli(rA.llteillia in profile gently concave lasiophthaliblaek, fin Face not mucii produced downward; in profile considerably concave below '{{jg midd auteumu „!i.u ^ With slioii '*^ gUM. ^- SYNOPSIS OF NORTH AMERICAN SYRPHIDiE. 39 If. Anteniiiic brown ; third joint small, snbqnadrato; arista baro ; facial tuborcle not projecting beyond antennal process ; long pilose .... Baroni Antenna- light reddish-yellow; third joint rather large, oval; arista Jiiiely pubescent; facial tubercle strongly projecting; pile of body short. petulca 9 ^—.Soutelluin w ith bristles on its margin . 7 Scutelliuri without bristles on its margin H ack, or black ^^ — Second and third segments of abdomen chiell; opaque black; arista pubcHcont Head heillis {Ueucoparca i) pallipea^ i-t, small, thin; trlstis^ bare pubcf. Abdometi, or at hast third segUK-i.t, wholly shining 8 ' '■ 8. — Arista pubescent ; huincii, scutcllum, and lower part of the face with more or , rarely HOlllf less reddish or yellowish; abdomen wholly shining 9 l)are; a little Arista i)ilose; body without light markings 10 larply <'01K'ilV' 9l — Pubescence of the arista short ; face pallid below on the sides; legs luteous, •1 more or Ics' IVmora except the tip, black leucoparea Pubescence of the arista rather long; face with a yellowish spot on eiicli side art aonmtiinr , , "' ^ n- r, below pallipes? perpeiKliculiu tristis? 1 female IK^vc i©i.^L("gs black lugubiis n tlie male Tli* Legs in larg.) • • * ' ^ahitat. — Washington Territory ! -,■■'" 9. Length, 9""". Shining greenish black, tlic hcaii sliininy black. irsum black . Fsoe with a baud of white pollen below the antenna', extending down- e in protile bii w^ds narrowly along the eyes ; rather deeply concave below the au- . occidentatenjja3^ Ij,^. tubercle much ntore i»romiuent than the antennal process, ive below tbt" ^8[|0ft,]y .j,,,] deeply cciicave between it and the oral margin, not nuich m "intennatoP*^"*'*'*^ downwards; the lower border of the cbeeks gently concave. iiove the tui»rA.ntenna' light reddish yellow, the third joint large, oval; the arista lasiophthaicblaek, finely but distinctly pubescent. Front with whitish dust near concave below t^ii^ middle y,, ^\^^, sides, pile short. Eyes pilose. Dorsum of thorax with short whitish pile; on the post-alar callosities, and border of scutel- i| limi, with fine black bristles. Abdomen shining dark metallic green plenr jiile light colored, very short and thin. Legs brownish black; tipo h^uik icnioia, base and tip of ibur front tibiie, yellow; base and tip of liiiii ^jth louutra, and the four front tarsi, yellowish brown. Wings lightly infu« Joints rate ; stigma light yellow, veins near the base yellowish. ^jti, One si)e('imen. This si)ecies differs from C. Baroni, to which it i browi liiost neiirly allied, in the antenute being larger and lighter colored, th arista pubescent, the facial tubercle smaller and much less projecting The ])ile of the front, thorax and abdomen is, moreover, much shortc. Thi dlilos Chilosia Baroni, II. sp. Jlabifnt. — California, Washington Territory 1 S , 9 . Length, 7 to 9'"'". Deep shining black, with moderate nliundant whitish pile. Eyes pilose. Face on the sides somewli whitish i)ollinose, but without pile, except laterally between the latere arista groove and the eye ; near the middle a very large and convex tuberdf the sii not extending downward much below the eyes ; cheeks not broad. A: tcnnai small, reddish brown, third joint nearly square; arista biiri Frontal triangle somewhat swollen, with an impressed longitudiii line; pile fuscous. Front shining, clothed with abundant whitish pii Thorax, on tlie ])ost-alar callosities and the border of the scutellum, wii black l)ristly hairs ; the pile rather abundant and long. Abdoiiit everywhere shining, more metallic on the sides; the pile rather lot the tir and abundant on the sides toward the base. Legs black; tipof fenidi rather am! tibiie, except a black ring, yellowish red, the hind tibia? sometiiii- in the viith only the base and the tip reddish ; basal joints of the middle tiir dish a and sometimes of the hind tarsi, yellowish red, the terminal joints blac black. ish. Wings nearly hyaline, in the region of the cross- veins yellowi.v One faintly blackish toward the outer part; veins at the base, except i; costa, yellowish. One male and three female specimens, Washington Territory ai California (O. T. Baron). The specimen from Washington Territory larger, and the third joint of tlie autenuje is reddish yellow. Mat black iirom 1 bDlt)w eye, n green- Imii oi all .sle Chilosi (' Hah fornia, $ ately I concav Axiten Chilosia lasiophtlialma. (Plat(^ III, fi^'. -i.) ChfUosid lasiophthalmns Willistoii, Proc. Am. Phil. Soc, xx, IW6, 1882. Habitat, — Colorado ! $ . Length, 10 to 1!""", Frontal triangle moderately swollen, v an impressed longitudinal line, and light yellowish pile, Antem b|ack, brownish red, third joint not large, nearly square; arista bare, bl to wliich it i ter colored, th less projectiiij, , much shorte: ith moderati'l ides somewlia veen the later? ouvex tuberd not broad. Ai i-e; arista biiri I'd longitudiii nit whitish pi! scntelluiu, wit oiig. Abdoiiit [)ile rather lot k; tipof feiiKii tibiae sometiiii- the middle tiir^ iial joints blac veins yello\vi> base, except t; II Territory at ^ton Territorv How. x, :?06, 1882. ly swollen, wi l)ile. Aiitom ista bare, bliu arly vertical i lerably prodm base of the a s downward iit dusted witli y p metallic gm low pile, oil I SYNOPSIS OF NORTH AMERICAN SYRPIIID^i:. 41 pienrix? bnshy. Abdomen rather broadly oval, shining black, with abundant pile like that of the thorax. Tegulce light yellow. Legs black, with yellow pile; femora at the tip, base and tip of tibice, and basal joints of middle tarsi, yellow or luteous; front and hind tarsi brownish with more or less yellowish. Wings subhyaline with an indistiuct brownish sp(»t near the middle; veins of the basal part yellowish. Thirteen specimens, Colorado. Ohllosia occidentalis. (Flute III, figs, i, la.) Chvihyiia occUhnlalis VVilliston, Proc. Aw. Phil. Soc, xx, .Wo. Habitat. — California! <5 . Length, 11""". Eyes thickly pilose; fi'ontal triangle black, with black pile, somewhat swollen and with a central depression. Auten- nse black, third joint somewhat brownish, nearly orbicular, small ; arista with scarcely j)erceptib]e pubescence. Face shining black ; on the sides with rather long, sparse, light-colored i)ile ; slightly concave fSfom base of antennae to tip of tubercle, shortly and deeply concave b«low the latter ; a well-marked groove on the side parallel to the eye, running obliquely to the base of the antennai. Thorax deep green black, with blackish pile mixed with shorter lutescent. Scutel- Iqui on its border with a row of longer hairs. Abdomen oval, not at all slender, shining metallic green ou the sides and fourth segment; the lirst three segments mostly opaque black ; i)ile reddish yellow, rather long and abundant on the sides of the segments, nearly bare in the middle. Legs black, with yellowish and black pile ; tibiae red- dfeh at base and tip. Wings with a slight blackish tint, the veins black. One specimen, California. Chilosia pallipes. (Plate III, fig. 5.) CliiloHia palHpen Loew, Centur., iv, 70. .' Vhihxia tristis Loew, ibid., 71. Habitat. — White Mountains, Washington Territory, Oregon!, Cali- fornia, District of Columbia (O. S.). 9. Length, 7 to 8""". Shining metallic obscurely green. Front moder- ately broad, shining, lightly pollinose on the sides below, with a slight concavity in the middle above the base of the antennae ; pile yellow. itDtennse ferruginous red, third joint rather small, rounded-ovate; arista ^ack, rather thickly and long pubescent. Face whitish pollinose across bijlow base of the antennae ; shining black, except on each side below, there is a yellowish spot, sometimes smaller, at other times large and e|tending from the eye to the oral margin. In profile the face is deeply odiJcave belov; the antennaj, and the tubercle large and obtuse. Eyes bare. Humeri light yellow ; pile of thoracic dorsum very short, yellow. S^utellum at the tip, or most usually nearly wholly, brownish yellow, the base black ; pile yellow, and with six black bristles on its border. Abdomen wholly shining, not very oval; pile very short, on the disk ob- b> ill ^} II l4 i (, I i M : I I )i I 1 :^ 1 i' i .^ \ 42 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. Bcurc, on tlH» sides longer, whitish. Legs yellow; hind femora, exc basal third and tij), a ring on the oiiter i)art of hind tibia), and the liiin tarsi, brown or blaekish; sometimes the hhwk is of greater extent n; the hiinl legs, and there may be brownish rings on tlie outer part i middle femora and tibia\ Wings hyaline. S . Face wholly shining black, excei>t the thin whitish pollen belov the antoniii' and on the siecially in front; behind, iiitermixci with reddish y«'llow. Scutellum wholly shining black, pile long, black with reddish yellow, the latter more conspicuous as a fringe on the in der side of the margin. Abdomen oi)aiiue black ; the Hrst segment, hii ■„■ spots on the anterior angles of the tiiird, the fourtii segment wholly, am likewise the hypopygium, shining, metallic greenish black ; pile n: the disk black ; on the sides toward the front, longer, yellow. Le;;. black, tip of all the femora, base and tip of the til)ia', and the extrem base and tij* of all the tarsal joints, yellowish red. Wings distiuctl yellowish or brownish in front toward the base. Five males and forty females taken together (.lackson, N. 11., Jul 25-30,) assure me tiiat they must belong together. The females agn precisely with the description of ^;<«, except that they are all largci, while the males agree eshire. with the imptutaiit ditlereiice that there is, in mine at least, a moderately broad, o]>asa I^iicn-, (liMifiiv., iv, •!<'. Ildbitat.—iUAonulol, Eii*cic. lint. Vr., l^SI. TJit^t. JIdhlldt. — Oit'^ion!. 5. licn^^fli, ■'»'"'. Shilling- metallic ;ireen, with a hiassy rctlection. By«'s It. Ml', l-'ioiit with short IdackiMli |>ih^ Tacc slijjihtly excavated below the antJ-'Mia-, the tubercle lar;ie, obtuse, the epistoiiia nmcli less protuberant. Thorax with short, spaise, lutes(!ent pile. Abdomen broadly oval; wholly sliininy-, nearly bare, whitish pubescent toward the end. liC^s reddisli yellow; the tibia3 with a small brownish rinjjf, and the terminal Joints of the tarsi brown; sometimes flie anterior fe- mora at the base, the hind femora in larj^e ])art, and larger liiij^s of tho tibia*, brown or blackish. VViugH brownish; stigma luteous; veins black, yellowish at base. Four specimens. CUlosia lugubrii^M II. H|> Mithitot. — California!. i. Length, '"^ to 10""". Deep black, moderately shining;. AnteniuB small, black, the third joint reddisli brown, nearly rcctanjiular above, , . , rounygium shiiiii; Two specimens. The posterior part of the second and third abdom- inal segments are less metallic or sub-opa(pie. The eyes are bare. The pile of th(! thorax, when seen from behind, seems mostly black, from -^^ , , in front, hiteoua. . Legs who! black. Chilosia leucoparea. Chiloxia leucoparea Loow, Centur., iv, 69. Habitat. — Carolina (Lw.). 9 . Length, 0.5""". Black; eyes bare, antenna} red, arista very briefly pubescent; face below on each side light colored ; humeri light colored; jlack, third siKjQjiygj,, „f ^j,g scntellum testaceous, provided with bri.stles ; legs hite- emuch swolltong^ femora, except the tip, black. Black, moderately shining; pile •avse pile, gent gj^oj^ and not abundant, on the di.sk of the abdomen and at the tii> '•> '*^*t"'^<^ ""f^blaeki.sh, elsewhere whiti.sh ; pile of the vertex a little longer, black, ax black, ncarpypy^ narrow, plane. Antenme wholly red, third joint rounded oval; ght yellow, wiarigta black. Face black, shining, above strongly excavated, below en deep volve' SI r; ,i___ i .,,,,.,, ' deep red at all thickened *^ 2. — Legs ([uite slender, the niet.itarsi of the male not thickened, alxhunen in the ii j]Uaj|mQg|.| witli tliree ]iairs of reddish-yellow s]iots y../^ Hind metatai'si of the male always somewhat thickened; l).ind.s of ahdonun rr i -, tallic or jrreenish, not reddish-y( How 3.— Eiice with a iirominent tnherele; ahdomen of male narrow, elouLjate, liroaih- O * ''*'' ti)) of I'onrth segmenr, sjjots elongate angiistatuWlth wlii Tnliercle oft'ace not ,it all |M.tminent, indistinct ; lilxlomen not elongate, not 'u' terVHis ol out a* tip of fonrlli s<'gment, spots (piadrate: in female oval with t'oin- 1' -)yQ|. 1]^, of triangnlar spots '"^""''project ill 4,— Ihe ipollen of the i\\rr leaves small circular continent spots, ripple-like, et'„ , . ground ccdor; second alidoininal segme.it (. otinctlv broader liehind. '" '" tisiini'^^rtlical t The pollen of the face I,; nn, m, or if soniewhfit ]ii)plo-like. not composed m ^re©!!, eh '■'i'"!'*!'""'^ ;eresbr(n 5. -I'ollen ^r faci' sone whai striate on the sides; ]>ile of thorax dusky , obacunyjn ^j^ .i Pollen of face nnif'inn ; pile of iliorax whitish •. 6. — .\li(!omen ■^Icndei- ccerulesce:' Alidomen oval (.*>'///■/'/'».'< m'/k/u'i.i). For additional species, see descriptions. USEUM. SYNOPSIS OF NORTH AMERICAN SYRPIIID.E. 47 trsum of tliDi Melanostom.u?) riifipeB. ■tlll'ltO shiliii '/I'l/ox/.f niJi/Hx Willistdii, riH)C. Am. Pliil. Soc, xx. 30(5. ISS^. e and inetata' Huhitut. — \\iisliinf>t(Hi T»>rritory! • to'^uliu Avlii *• I^*'",utIi,.S to !>""". I'^iU'c .sliiniufj; black, except the prominent tul>er- clearer sti"i cle and the cliccks, i)artiaUy concealed beneath even, whitisn pollen. Front a little narrowed above; lielow the nnddle a shallow, transverse depression, on each side of wiiicli tiiere is a triangular whitish i)ollino.se spot neai' tlir eye. contiinions alon;;' the eye nai'rowly to the face. An- («//»V)/(»s).— Mcx tenna' blackish, third joiid a liltle elonji'ate, reddisii on tiie nndei- sid«'. Thorax metallic };reen- black, finely pnnctnlate, nearly bare, the pubes- cence wiiiti.-h. Abdomen elonji'ate oval, the third se^'iiient of neaily equal width llir()ui;iioiit, not narrowed behind: first sej^ment shininj.'; '"■ 8econd st'^iiiicnt on the sides with a larjic trianjiidar spot, extending' th<' )iloso or Ilea; whole len;;th of the sejiinent on the sides. lij;iit jireen, moderately siiin- I li'ditercolm ing, elscwlicre sMb-oi)a(iue black, witii a slimht greenish letlection; Antenna' sliii third segmeid similar, but the s]iots more nairowly separated; on tlu^ Face (list i lie fourth segment tiu^ spots are ('onflnent, forming an entire (aoss-ltand, never in oidii concave behind, the remainder of tlic segment sliining l)hutk ; rvmain- v'cs bare, coining segments wiiolly sinning greeiiisli. Legs dark red, rather stout; i>r reddish itiai the hind feim ra, or all the femora, more or less bi'own oi' blackisii at onsiderably ll the base; hi'i 1 metataisi a little thickened. ^Vings sliort, projecting little tiiickeii t)Ut ii'Hc beyond tij* of abdomen, nearly hyaline; stigma dilutely yel- irginalcelloiJoWish. •St posteriori Four s]tecim< a. . ^^V'.isliington Terrilory, Until the male of this species is known, its position is somewhat doabtfiil. Its relationship to Chilosia is very strong, but the distinctly- (t- tlih-d ainltiiii l>anded abdomen wouhl seem to remove it from that genus; possibly ir Mid i'oiutli sifiim isaPlatychirus. With these four specimens is a fifth, agreeing through- only n tittlo lin.out in every i'es]iect with tiu' others, excei)t that the femora are a little . . . r\ifiF:,la,l.|j^.,.^ .,,!,{ jin. uhdoineii, except t!ie first segment, is of a unilortn iiiK mci.i ''i^ (]gQp ,.,,,!_ 'I'ln, (.,,1,),. seems not to be due to immaturity. Kldin.'ii ill tli.iiMetanostoma tigiinum. (,1'1;U.' fll, (i,u-. .-:.) .V.7x/ii»/(( ////('Mid Ostt'ii S;ii'l""". Face and front dark metallic green, the formev aiigiistatwith wliite pollen, form'ng traiisvei-se, irregular dotted ripple-;, the iii- loiinati , iioi Intervals of wiiicli show the ground coloi' : llie eluH'ks and a stripe running viil wilhroiur^ver tlie facial tubercle are. bare of pollen: facial tubercle obtusely . . niellimpj^j^j,^jii„,_ Anteume black, tlnrd joint and arista brown, or reddish. •'lu'l'iiiul* ' ^^^^ faintly and evenly grayish jiollinose and with erect black jtilo; tigiinr'^crttcal triangle metallic green, with bhu-k jiile. Thorax metallie. bluish oi (•oini)os((i iM^reeii, clothed witii dull grayish pile, more whitish on the pleura'.. Jlal- ■ . . • ;eres brownish. Abdomen elongateelliptical, broadest at the hind mar- ■,k.v . obscurijjjj ^|- jii,, second segment; first segment greenish black; the; second ■^,^j.^jgj.(!.'elvet- black opaque, the lateral ad'^vii metallic olive green with a small 48 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. .1 'i-l i > > subtriaiisular I'xpaiisioii; third sej^jinc'iit iuitoviorly with an iiitenn]i; iiR'taUic! j^rei'iiish cross-band, nearly half as broad as the se{.vnK'nt. ' expanded on the sides along the whole lateral inarj,Mn; the po.stci ludf ot'the sej?inent is of a velvet-blaek, which does not quite reacli • lateral marjjin; the fourth segment is like the tliird except that the dl green cross-ba?id is not interrupted, or only sal) interrupted, and i nected l)y a longitudinal stripe of the same color, cutting throngli ; velvet-black portion, with the nfirrow hind margin of the segment; ti the velvet-black on this segment forms a broad, interrupted cross-lin luirrowly reaching the lateral margin; illth segment and l!ypo))yi;T metallic green. Femora metallic; green; knees yellowish brown ; ti yellowish brown or brownish yellow at the base, darker toward the especially of the last ])air; tarsi black, first Joii-t of the mi])ery, triangular sjki; each side of the base ; third segment with a small triangular spot in niiddle belli n brownish ; front and middle legs yellowish led, femora at base, amiPendicii of tarsi, black; hind metatarsi in :lie unile slightly thickened. ^V: Frontal nearly hyaline. the feiii; Six specimens: ^Mount Washington (William Patton, G. DiuuiK'*'lialIow Corrnecticut, and Pennsylvania (Keen). whitish ©laewhe the til) behind ishyell Melaao; J/ iiio' thronjiii; le s('i;iiiciit ; ti ptod cross-hii! iiid h.vpo]).vui ish brown ; ti' r toward the ■ the luiddU' i; iiijis subhyali! I'lorado, and tlr ." that only uiii SYXOPi^LS OF NOK«riI AMERICAN SYRPHID^E. 49 Melanostoma ccen.lescenB, u. sji. //rt/>//r/^— (;oh)ra(h> ! $ . Leiijrtl), S to '.»""". Face deep Khiiiiiifi- greenish blue; exc^t the tobeicle and checks, evcidy covered willi grayish pollen. Face in pro- file consi(U'rably projectniji-, the tubercle lar^e ; frontal trianyle w :tli lonji blackisli pile, vertical triaiifile with liyiiteolored i)ile ; (cheeks con- cave Irom before backwards below. Antenna- bia(;k, third Joint brown, more or less yellowish below. Thorax bri,iilit sliinin^; metallic ^^reenisU Wne, pile {jrayish wliite. Abdomen latliei slender aniiient on ■each side there is a small yellowish or whitish spot ; third segment in the middle and lu'hind oi>a(ine black, on the sides, on the anterior half •or two-thii'ds, a lar:!, (it ; Eiitoni. S.vst.iv, ;!0M, llu ; (?) Meigen ISysl. Bt-.scbr., iii, Ijiil, tr."); .ScliiiitT, Dipt. Anstr. Vcrli. Z. B. Gcs., vii.afj."). Scaeva walafinYahrichiH, Aut\. y'^'i'-i, 14; ZetterHtedt, Dipt. Scand., ii, 760, and viii, :U.-)4,()a. Siirjihu^ Hculid-in J'an/.er, Fauna, xl v, 211 ; Meigen, Syht. Beschr., iii, 1530, 83 ; Fab- ricins, I'.nt. Synt., iv, :iOd, 11-i. Sijrphiifi [fix >!fiyen, 8ynt. Bcsclir., iii,:?i!0, 67. Si/rphuH luelliirius Moiyen, Sywl. Bi'sclir., IW8, pfl. Siiriihns uiclliliirf/ua Mi'iji.cn, Syist. Beschr., iii,:>'-iO, 82. Melniinnlom(t mt'lUna JSc'liiiicr, Fauna Aiistr., i,v!l)l. J/(7((»o,v/()//i(/ scidarin Ostcn Sacken, Cat. Dijit., Iv^l. f MelaiwHtoma /iniinoKa Bij;ot, Auiuiles Soc. Eut. do Fr., 1884,79. Habitat. — Europi', North America! i,?. Length, (5 to 7""". iShining metallic or black green. Face per- a a ♦^ base iiiiiiP6B''^'^'"*i«>"' "" either v«;ide of which, near the eyes, ■ whitish dusted, below nairowly coiine(!teovid, wholly s\v. and w endbl narro segDie green, oral y yellow segmei similar lateral segDiei inji', witii four pairs of red or yellowish si»ots : Ihe hrst pair sm;ill, ('a(;h side oi' the middle, and not touc.liin.i^' tlic laterid marj^ins, seen . , and third ]»airs touehiny the anterior margin, in shape like a rijilil;i:i. trian.ule, the i)oint directed back and broadly rounded; on tlic lit , .. segment smaller, neaily eonti.tiuous. Lej;s vaiiiiblc. reddish yellov. (\ « sritlarc] with brownish rliijis on the hind, oi' on all the til)ia!; or soiiietii; - ' the lej:s, ex(!ept the front pair, almost wholly l)i'ownish (var. meUinii,.^ the l)ase of the tibiae lighter. Hind metatarsi in aiale not tliiek(ii.„„^ ,' scarce]) ^VinJ4s tinji'ed witli brownish yellow, sometimes faintly, at other lii „pji / igot's description of M. pruiiidsd ( 9 ) s! litido. ntice CO is"ai>domen d'un iioir opaque, base et extremite un jieu luisantt '',1/. fp'ocilis Meigeu and JA mdcniosa Meigen, both I-hirojicin!. ' * P'" stated to occui- in North America by IMr. Walker, List, etc., iii, .">ss. ^' '^" Mr. A'Vrrall inlbrms m(> that 'those two si»ccies are synonyms ol (it'iii h'ab. [M. mHHinn)!]. But Mv. Walkers tSi/rphns iikicuIonus ii;i- ^"*''> rei»resentatives in the iiiilish Museum, both Pldiijcliiri, one reseiii F. hnmarginutuH Zett., the other resembling i'. scamhnu Staeger.'" ( Sacken. Cat. l)i|)t., 122. nseo-Iiy |laB desii uarta sn irminaii MelanoB'oma angnstatiira, n. s|). (t'latc IIF, lin. 7.) asi inl'er JlnhUiit. — Washinglou Territory ! ipto.br; £ . Length, !) to Ml""". Allied to M. nielli )nnii, but the face is iiioicbdooieu jecting, and the abdomen is longei' and more slender, l-'ace sin; Jonge p metallic greenish black, light ly dusted with white, nearly jierpendiir'evissim in the middle with a rather jnondn. nt, small tubercle; cheeks ccMhistace below, rrontal triangle gently swollen, with it HUutUpitin the ni^edes nig SEUM. SYNOPSIS O'. NORTH AMERICAN SYRPHID^E. ^on thesecoi, g^jj^ ^j(^],])l,r,ckpilo. Anteiinfr, reddish .yellow, tlio third joint at the outer iista yei.ow gii^l)l;i(.l;i.sii. Thorax and isciitellmn brigfht metallic; green. Abdomen 'How spois.t' jjgjj.(,^^.^ cloiiifate, artainin{,'it.s greatest width at the end of the fourth -ii'ient ; sccoi ggg^j,,,^ . iij.^^ segment, and the front part and sides of the second, Itronze ir, but sniiill.: gjig^,,^ ,|,,t nuicli shining; second segment in the middle with two small ck asansni ^^^j vcilow sjiots. heliind subopaque l>hu;k ; third, with two elongate fourth, and ti y^jj^j^y .si»ots, reaching from the front miirgin to beyond the middle of the id. wholly >ii! gggjjjj.iij.^ .jjijj ^,„,(.i|j,|o' tiie lateral margins in fiont; fourth segment pair smiill.i gjjjjjj.,^^ ],„|- .\^^, ^pots a little less elongate, and the posterior jiart and margins, seen jj^^gj,.,; ,|,;iv^iiis of t lie segment shining green ; the neaily-coneeaied llfth ke a right :iii.gggPi^.ij, .^^^^^ Hi^. iiypopygimn shining green black. Legs sometimes .(I; on the 'i' ^ijoUy ycUo^v, excciit a brownish ring on the front tibiae; usually the lish yeUo\". (^ front and middle femora and tibia' with broad l)rown rings, and the hind ic; or sometni fgmo,,., ,,,„i (ji^j.,. „iti, l.ir);i(l black I'ings; the front tarsi li;;litly, the hind ■meliinii, i not thickeiHgg^gj,,^. .^^ .^11 tiiiekened ■, at other tiiypijQ^.' Five specimens, Washington Territory (II. K. Morrison). Kansas, ami ' 1 4- ,.,... 1. Melauostonia tiichopus. le anrenna.i'. . Si/r/iliiin InclnijiKK I lioiiisdii, Eii^i'iiii's ri-s;i, ctf.., ii(l-2. iber ot its s\ Habitat. — ('alifornia (Thoms(Mi). Niger, facie, abdominis maculis latc- 'alibus siaitelloque plnmbeis, tibiis tarsiscpie anterioribus dilute fuscis. 3. Long. .S-i» mill. Patria, California. J9, J'ciicslralo 'SlXCi.i. simillimus, thorace hand viriui, eosta in apiee (var. '"'^"'""' tarsi except the tip of the lirst, joint, darker, brownish; hind metatarsi Wings tinged with brownish, the stigma climer says(i ibigen minit ichen, in iciic ' , , pso exciirreiite distinetns. Caput heniis|)l!iericum, interne brevirer ''^ 'OStrato-productum, infra antennas vix impressun*, tnbereulo supra iiidortenemui- ' . . . ,•.•',., 1 . , , , "''yP*"'" parvo; occipitt opaco iuneo iiigro; oenlis tronte late eohicren- '" ,, ' , ibttS, interne ad os haud descendentibus, margine po-s ;c;o vix sinuato, 1' IJntersui'iii ' . . , . ., . , . i/lDiaopruinoso; tronte supra antennas dense nigropilos;i ; episio;aate , dtido, a-neo, lateribus parcius albidopubescenti, apertura oi'is ol)longa,- "'". ^ .. ntice (;onstri(!ta; genis linea oblicjua impressaab e])i.stomate discietis; " , ^' "ula pliimbea, ]>allido-piiOsa. Antennaj l)asi panllo distantes, ^. 707 I ■' .. ante. Thorax idumbeo iiiger, subopacus, iusco i)ilosus: scutellum viionvms el . ' . ". ' ' , , ■ , lumbeo-virescens, longuis nigro-i)uosum. Ahc abdomine longio"t>s, "" ' ' ' ' , ri8eo-h\alina% eelluhi i)ost-costali obsc-ure llava; eosta in ipso apice (, one reseiiil , , '. u 1 i • 1 i- * 1 •• • l8B aesutente, eellula ULScoulali nervuiu transversum ordmaruim in : Staeger . ' " ( )- uarta sua anteriore ])ar(e excii»iente, nervo exteriore hand llexm»so efc jrmlnali apice extus appeudieulo parvo in; tructis, hoc neivo exteriore asi inferno llexuoso; nervo spurio ante a]ncem celluli^-, "'scoidalis ab- ipto,braehii abscissa 4: o ta nervo transver.so breviore. IJalteres iiigri. efaeeis moiv.bdomen thorace (fcimidio longius, apicem versus angustatum, sat dense er. Face slivilonge pra'serlim hasi fusco-pilosum, atroholosericeum, segmentis5:o I'ly ])er])enil'.' 't^vissiuK* et G:o tot is, l!-! maiailis lateralibus prope basin plumbeo- le; cheeks c' -liistac cis, his fas(.'ias seiisim mimis late interiui)tas formantibus. 1 pit ill the 111 edes nigri, femori'ous omnibus tibiisque posteriorilnis sate louge pilosis, 52 BULl-ETIX 31, T'NITED STATES XATIOXAE MUSEfM. i'l jj(Uinl)iLs, libiis tiu>is([ii(' iiiitoiioribiis bnuiiico-i'iiM'is. IN'ctus niiiili tr©8; ])!uiiib('iiiii, pjircius ])il(isuiii. i»hiiinil;i siibalis et ])('iiti('iiKit«' spiiacr olAirs riiiii nlbidis. — 'riioiiisoii. 8008 I I ciiiiiiol i(h'i!(il'v this siiccics with niiy of tlie Ibi'cjioiii^;, thoii-i (lOT/ici ruiiics iii'iirt'st lo .1/. lij/ftiiiihi. rt is more thiiii ])r<)biiV)le that it will sa biif Ibiiiid anion;;' Ihnsc ilcscrilird l)y liiii'ot. 4*, de 'i'hc tolhiwiii;^' spt-cics, (Icscribcd i)y Mi', lii.yot. pi'obably Ix'lon;^' tut: cdteis j>oiiiis; yet l'hil)/cliini,s slx-uld not he lost si;^ht ct' in ciidvavoi in;: idem iiy 'lii'iii. It is very probabl*' thai some of thciii art? syiioii\ of s])cci('s aii'cad.x' drscri!) d siilli*'i*'iit to dctci'iuiiK' tlicm. syiioiiyin of J/. uuU'nnuii, Melancfitoma ? pruiuosum. Ml Idiiiixliiuiti .' jiriiiiii}.s(i l)ii;oi 7A//^/M^_Ca!ifoiiiia (Wv^.) l>iil my iiiatoria! and patience arc M. Iiniiiio.'oiii) I have ;^i\eM as a i)i()li.i Am. Sor. Enfc, Fr., 1884. 7L>. annea pres(p teniio; saut 1 1 Melant .1 Bah i L 9. Lon;;. S""". Aiili mils Jitlris. ojncc fiiscis ; fyontv rt facie, nui ' ' nitidis, itiriiuiiic Jtiirit /.'fuiiiosis; thotutci' nigro, oljscKrr (I'lwsi-oiti'; cttbip- ^*^^^' ^ cynoe a bm fu tdlfis. l(((lt(rihiis J'ldri.s. ilarn t'uscii ; iiltdontinv nifirn oimco, sripiKiiti iitriiifjuc, iiKiiuIn ol>ll(jKi'(, oitloiifia, .'»" vt t", nutvulis xtfiiKjiic latis,J'ri\ oi>i;!s, .">", Iinii'li.s liitcntliltKs Jlaris; jujlilms Jlnriilis, J'(:i)ioril>iis tili'n- parum jHsro itininUilis. s(V})r riaiicscentiltus, tarsis jioslicin j'hsca ids, in<-isitri. Iliiridis; (ids hi/tdiids. ..\n;ennes fames, bonis siiperieiirs, ex'treniite ii (diete. bniiis: i et face (run noir luisant, converts dc chaias avee des anneaiix b"inatrcs Jois pen distiiicts, tarses avee I'extrt'mite lirunatre, les posterieurs t'()ne('S ave(! les arlicnlations lar^einent jaunatresj ailes hyalines. Ant( ch^te 1 pruiiiei nNjiset po8t6ii les c6t( bran la Antem passan i/ HabI 9. I (eiiiies, ;;<■ seniiient ovale; abdomen etroit; ailes depassant a peiin i*^*^^ ' extremite. Calitbrnie thora(( domiiiv ntrim/u teataico tarsis It nigris. — 'J specim. Melauostoma '' pictipes. Mitaiiiiisloma ? pictiiiia Bijiot, Aim. Soc. Eut. Er., Ih'84, 78. .77V//>/^/f.— California ( \Vv^.). i. Lony, 0""". yitjra, })a>\ini idtiila. Antmnifi caataneis; i nitida ; farir, ufriiifjiic ciiiereo prninosfi; ((dj/ptris et holteriJms J\- id)(l()»iiiie idiffo ojxivo. Ixxsi albidn pHosidd, tipiee et utri)i(juc nititlo: cuds hiisadlms, ntHiiqiie.fcii' tritjonis, cinercis poruin metatlcseentiliux: 'ihns J'iilvis,feni()ril)iis tdddsque l((te fasiv nitjro cmmdatis iursis ((jh iiifiisc(dis, post iris fnseis; ads fere hyaUnis, maciiiu stifpuatieali tcsUu laiftan Antennes iioires, ;.!« seymeut et chijte d'un taiivo ol)scur; front ^cnssoii luisant il polls uoirs j face noire, callosito laisa„ SYNOPSIS OF NORTH AMERICAN SYRPHID.E. 53 fc rt facie, niij nrxciiitc; citliip- fhico, sf'tpm iifi uqiic ltitis,l'ii; cnuirihii.s lihii- (lldK, illciNIII'l-' K'tc, bruiis : i: ar line ])niii!n' lies ; ll!()ia.\. i ■, blaiieliiitic; t ixiiiiiH'ii (run lit avec deux ear, o" et 4' . ,; s (;utf's. ('<: (lis iarsis ((pi' •malii'tdi IcsliH hseiir; front : les il retlets g: tWis; thorax, dcnsfson, d'un noir un i»eu bronze, couverts d'nn duvet dAirseiiie roussutre, flaiics t\ duvet gris, uue petite toutJe de polls blaucs 8008 les cuilleroiKs, ce8 dc^ruiers, aiiisi que lea balanciers, testac^a ; ab- domen (I'liii noir opaque, muni de duvet blanchatre, priiicipaleuient di sa base, V^ segment, bords latc^ranx, marges des 4« et 5", luisauts, 3" et 4", de cliaque eot^;, avec une inaeule basilaire trigonale joignaiit les c6t€'s et d'un gris d'acier; pieds fauves, euisses et tibias avec un large anneaii noiratre, tarses uoirs ii IVxtrdmit^, postdrieurs cliatains; ailes pres(|ue hyalines, macule stigmatitiue etroite, allongee, roussatra. Au- tennes, 3" segment ovalaire, oblong; abdomen 6troitj ailes ue d^pas- gant pas .son extr6mite. Calitbrnie — 4 specim. Melanostoma ? bicruciatum. MihuiOKtomn? hieniciata Bifiot, Ami. Soc. Eiit. Fr., 18S4, 79. JS^a/>//a^— Caliibruia (Big.). i Ii(»ng. 7""". Anfcnnis/ulvis, npice funds; facie ctf route nign's, niti- dis, nlriiiqne cinereo priiiiiDnix; thorace scutelloquc nigris, obncnre (vne- scentihux; cahiptriH of haitcrihaa tenfaceis; ahdomine nigro opaco, baai et apicc aiigiiNtc vitido, vtrinqne viaculiN tribiis latin, quadratic, fuivin ; pedi- bus fiilrin, femoribxiH fibiisque late funco paUido anmihitis, tamis apice parum infuHcafis; alis In/alinis. Anteimcs fauves, brunes en dessus et a i'extnuiiite du .'5'' segment, ch6te bniii; front d'un noir hiisant; face de iiieiiie avec relicts d'un gris pruiueux siir les c6t(!'s; thorax, ecnsson, noir.'-". ti relicts bronzes; cuille- rons et balanciers testaces; abdomen d'un noir ojiaque, !"■ .segment, bords post^i'icurs des 4'' et ry luisants, six larges macules earces, alteignant les cotes, fauves; ]>ieds fauves, cuisses et tibias largemeiit aiinel6s d'un bruu lave, cxtremite destarses brune; ailes hyalines, stigiiiate fort pale. Anteiuies, 3" segment ovalaire; abdomen etroit, oblong, ailes ne d6- passaiit ])as son extr<''niitficure a'neis haltrribvH paUidc testnceiii ; ab- domiiir nigra opaco, apicc auguatc nitido, lined tcmii, dorsali, cinerascente, utrinqiic maeiiUs tribus latis, fere qtiadratifi, cincraHccutibus et obscure testaiia pictis; pedibuH fulcis, fcinoribus posticoruni iuterniediorumqne, tarsis basi, apice, nigris, fibiis\ late pallide fusco annulatis pedibuH postieis nigris, gcnieuUs fuicis; alis hyaUnis macula, stiginaticaU, clongatd^ testa- Resemble a la M. '? nictipcs, iiiais en dift"6re surtoiit par la face, qui se prolonge seiisiblement en avaiit sous la forme d'un obtus. Antennes faittes. iioiratres a la base el en-dessus, ch6te briiii; front d'un noir luiftaiit ain.si (jue la face, eelk'ci ii leflels gris sur les cotds; thorax, ^dOsson, noirs a refle's bronzes, tlaucs a di.vet blanchatroj cuillerona 1 1 •: \ i\ ¥ ir 1.1 1 54 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. blancs, balanciers testaces; abdouieu (I'lin iioir uiat, premier et deruir neot V( Hcjiiiients iin peu luisaiits, uiie ligue inC'diane, etroite, {jrisutre, et, lat flattein ralcmont, trois larges macules carrees, attei^iiaiit les bords, d'un }j,n> wards retlotH fjMives; i)ieds aiiterieiirs et, iiiteririediaires fauves avec, las lii third t, Arm. 8oc. Eiit. Fr., 1H84, 80. Hahilut. — Califoinia (Big.)- 9. Long. 7""". Autenniii fulvis, apice 7iigrifi; facie et fronte niij iiitido ; thorace HvAdclloquc, niu.sj'iilri.;, nicUitnrso po,stico purutH incransalo^/eitioyibus tibiisqiw pus CIS Idle u'ujro ofniulafis, tnrsin oDniibnn iiifjris, incisuris fulviii; alls hi. Unix, macula louya .stiymaticali pallidc tcfitaccd. Anteiines f.uivcs, extremitc^ du 3' segment et clifite noirs; front face d'un noir luisjint; thorax, ecusson, noirs avec relicts bronzds; ( illerons blancliarrcs, balancier.s d'un Jiuine ])rde; abdomen iu)ir, i)r«'iii: et dernier segments luisauts, 2" avec deux i)oints ronds, 3'' et 4" avi de chaque (!6t6, uik' large macule trigoiude basilaire, n'atteignant ]> les bords hiteraux, le sonimet dirig^ en arriere, 5*' avec; deux bum basilaires lauves; pieds fauves. cuisscs et tibias posterieurs largeiiit^ ^'''***^^ ' anneles dc noiratre, tibias anterieurs et interm^diaires avec les pa! * ' ® 1""* vestiges de semblables anneaux, tons les tarses noiratres avec lei; articuliiti»>ns fauves; ailes ])resque hyalines, stigmate (itroit, alloii: d'un jaunatre ]»ale. Aiitenncs, 3'- scguieut court, ovaloide; abdoui' ^Cioit. deprim''^; ailes le de[)assant notablemeut; metatarses post^riei. legerement epaissis. Califoruie. — 1 specim. ,Sro I'll Habit i, 9 ADDITIONAL NORTH AMKRICAN SPECIES. Melanostoma ? aiithracoides 15i,iiot, Ann. Soc. Eut. Fr., 1884, 82. — Panama. Melanostoma ? annuliferiim Bif^ot, ibid., 84. — Jklexico. Melanostoma ? cruciatum liij^ot, ibid., 81. — Mc-cico. Melanostoma ? quadrinotatum Bigot, ibid., 77. — Mexico. PYROPHJINA. domen \ the thii( at base darker » flection, low or y I do n Pyiophae Scm Si/rp I'lat Pyropkama Sohiner, Wieu. Eut. Monatsclir., iv, 21.3, 1860. ^'■'"'' Medium sized, black, nearly bare species, with ferruginous or oran; ■"^"''" yellow bands on the abdomen . In structure closely allied to Melanostot ° ' * • and Platychirus, but distinguished by the much larger, more proa J'^" USEUM. SYNOPSIS OF NORTH AMERICAN SYRPHID^E. 55 luier et deruic: neot vertical triiiiigle, the ocelli being situated further forward, by the rittutre, et, lat flattened iibdoiiien, which is long oval in shape and more narroN\ed to- rds, d'un }j,ii> wurdH its base, so that its greatest width is attained at the end of the 4 avec, las l);i third segment; the wings also are shorter and broader, scarcely pro- ineau bruiiiii jeoting beyond the end of the abdomen. The tarsi of the male may be IX tauves; ail either (lattcned or simple. Type of genus J*, oeymi (Fabr.) Schiner. segment «U'.s u Our two .species are also European, and the only known ones in the s court que 1 geuus. The genus, ta.xonomiciilly, is equivalent to Melanostoma and Platychirus combined. The Hies are apparently rare; I have but two specimens collected in this country. ;3 TABLE OF SPECIES. AbdoDicn larjicly reddish yellow ; front and niiddh) tarMi of the male llattened..ocymi. et jronte nuj ^btiomen lilack, witli two roddiHh yellow Hpots on the third sej^nient ; front nu'- iS albifi^ liaiti tuiiiisi ()lMi;il»< not Ual toned roaarum. uo rotundath. Pyrophaena rosarum. l^liriilni^ romiriim Faliricinn, Mantissa Ins., ii, :i41, 71 ; Entoin. Syst. iv, 'Mt7. 109; Mci;;i'n, 8yst. Bcsclir. iii, liliS, 91; Piinzor, Fauna, cviil, 14; M;h ([uavt. Hist. N.it. Dipt, i, .540, :{9 ; Walker, Ins. IJrit. i, a95, HO; Schiner, V.-rh. Z. B. Ge.s. vii, l!.')7. :Siirj)hiin iiocliliicuH Panzer, Fanna, Ixxii, 5i4\nnile). iScaira rosurinn Fahrieins, Antl., '^'>l, 11; Fallen, Syrpli. 47, 22; Zetterstedt, Dipt. Scand. ii, Tf)'), and viii, lUTrJ, 58. I'l/rojilidiia roKuniin Schiner, Wien. Eiit. Monatschr., iv, 213; Fauna Austr. i, 29H; Osten Sacken, Cat. Dipt., 12-,'. Mahitrif. — Europe, N(U'tli America ((). S.). S, 9. Length, , ■ little ])rominent. Thorax with two approximate whitish stripes. Ab- , „ domen \elvet black, with the exception of two reddish yellow si>ots on btres avec ieii ' ^ j i M • 't 11 I * third segment, ant ocymi Fal)ricius, Sy.st. Ent., iv, 309, 114; Panzer, Fauna, Ixxxii, 18; Mei^cn. Syst. Bfsehr. lii, :?87, 93(foniale); Macqnarfc, Hist. Nat. Dipt., i, 54(j, 40 ; Schiner, Verh. Z. B. (ies., vii, :i()2. Si/rphuH lobat'i8 Meigen, Syst. Bescbr.,iii, IWG, 92 (male). Sc(pva octimi Fabricius, Antl., 252, 18; Fallen, Syrpb., 48, 23; Zetterstedt, Dipt. Scand., ii, 7.'54, and viii, 31")2, 57. Syrphus (jranditarsua Walker, Ins. Brit., i, 295, 29. I'ldlijchciruH ocymi Stgeger, Kroj. Tidsskr., iv, 320. I'Hiophonii ocymi Schiner, Wien. Ent. Monatschr., iv, 213; Fauna Austr., i,297. Habitat. — l']uro]>e, North America! S, 9 . Length, 8 to 9"'". Metallic black. Antennae brownish black, oide; abdom- rses post^rici .— Panama. iuous or oran; to MelanostoR ir more proa^'^^'^ j"'"*^ convex below, nearly rectangular at the eud above. Face 66 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. ' I, •'! ^li i Fr 3.-Fn Fvu Fctr Ptatyc: ■s r yollou bluish l)li»ck, in tlii' f'cinalo more metallic blue, witli tliin, wliitisli diis' nt'arly ixMix'tidiciiIiir in profiU' with a proniiiiciit, wrll defined tubercle and a smaller (die below it. Frontal and vertical trianj,Mes with Itlii^ pile; front in the female with bhutk pile, ('xcept at tlie vertex. Dorsm of thorax with three opa()ue stripes in the male, wholly bright shiiiii;, metallic preen in the female. S(!iitellum shininj,' bluish metallic grcci I'irst sej^inent of the ab black, sometimes also a less distinct ring on the hind femora; in stiiii ure the legs show no peculiarities. Wings tinged with reddish biou: nent. tiarker in the middle. and wi Two specimens (iom Holland (v. d. Wnlp), a single female speciuit reflecti from Washington Territory (Morrison), and a female from Labiini middle (Heushaw). grayisl three li nal stri mens cross! the lift Medium sized to rather small species, elongate, nearly bare, black oran'-t metallic^ green, with yellow, reddish, or whitish yellow spots on abdomen. Wholly like MelmiosUnna., except in the structure of legs. In the male the tibia' are more or less dilated in the front ] the front metatarsi always, and the remaining joints more oi' less, in the female the front tibiui and metatarsi, though not dilated ;i> gj^g f| the male, are comparatively broader than those in Melnnostoma. uallv thicken TABLE OF SPECIES. Jfn,, 1. — Front tibia) in tlio male Ki'-i'lmiHy dihited from tho base, tlio tarsi <;rartnallv Platych ri PLATYCHIRUS. Platiicheirus St. Fargeau and ServiJlt-, Encycl. Meth.. x, 513, 1825. l>ygimi last tw one or lated, ; I creasing in widtb from the base to the tij); prolile of th« face only gf. concave above the tubercle, the latter small ; cheeks convex below . . Front tibial of the male slender, suddenly dilat<'d at the tip, nKitatarwi n. dilated, the remaining joinls but slightly so ; the front femora in tli"ii with a thick row of hairy pill.' on the posterior side; face in bi>tl with ii conspicuous tubercle ; cheeks concave below .... pelta' Bah I , vania. S. i coveret JSEUM. sYNorsis r»r xoirni amkrica.n syrpmid.e. 57 1, wliitish dns' pfliiHl tul)erclt rlt'S with llllK: •rtcx. Doisiii: bright Hhiiiiii, metallic {ivm .'{illUMlt witii Idle behind; ; rd, and the ai le on the i)()st. th lai'},'«'-r, l)];i' >d, anterior, n base of all t ted, and willi iial; the uiitld iits snecessive at elonj^ate. 1 si, the last tu d the hind tiii' mora; in sliii' I reddish binu female speeiiiit ( from Labrad 1825. l.v bare, black ow spots ou t structure of t n the front \u more or less, ^ lot dilated a> Innostoma. >, tarni grartnallv th« face only g'' nvcx below . ■ tip, iiititatiir.fi v: t femora in tli- ': I'aci.! ill 1i"tli -'■ . . . pelta' 1.— TiHiit til>iM' of till' mall', "ii tli'- inm r sidr towanl ilic ciiil, wnupwliiit (•(.ncavc, the oiitfi- iui^ili' I>ri)iliM('(l inlii a lapi>ftlikc |irm tlie inner ttide, tiie lip on tlie outer Hide less piodiieed, more angular; mjioIh of alidomen wm iller, liind li UN (liieliy lilack 3 3.— Front femora in the m;ile witii a row of five to seven lon^ bristly liairs; second alidoniinal segment with lar^fe, the tilth with nmall yellow sjiots . . . chcetopodus Front femora w.thont mh'Ii Urislles ; second Mej;nient of the alidomen in hot h sexen witli a small mnsided spot on eaeli side, lifMi segment in the nuilo without yellow hyperboreus For other spcfies, see deseription. PlatychiruB quadiatus. ( Plate 111, li;;s, 10, lUa.) Wiiru ijinidi-dtu Say, J. Aead. I'hil., iii, !•(', 4, Compl. VVr., ii, 79. Siirpliii'^ (luutlrahiH Wiedeinanu, Auhh. Zw. Ins., ii, lH.'j, 'i'i. Si/rjiliKs I'liKCdHiiiitntiH Mai'i|narl, Dipt. I",xol., .V Snppl., {K>, 58. I'ldlilcliiniK iiii(idrttlii'< O.-ti'ii .'^aeken, Cat. Dipt., I'Jvi. Mnliltat. — Eastern, Middle and Pacilie States! ^,9. Length. 7""". I'aee deep shiniu}; yreen, thi(!kl,v covered with yollowisli pollen; in jdolile a little reeedimr, tubercle very little ])romi- nent. Antenna' brownish blaek. Frontal triangle .yellowisii polliuose and with black pile; front in female shinin;,', with a simiewh, it coppery reflection, pollinosc on the sides below, and dilated inwardly near the middle. Tiioi.i.\ deep .sliininf;' metallic ;:i'een ; ])lcnra' with wliitisii or grayisli pollen Sciitellmn lik<' the thoracic dorsum. Abd(»men with three laroe pairs of quadrate, oranjic yellow spots, leaving- a louoitudi- nal stripe and three cross-bands shining black, which in some speci- mens are slender, brown, or even obsolete; in the female the black cross-bands are often dilated in the middle, and narrowed on tin; sides; the fifth segment with a median blat-k stripe, dilated behind, or wholly orange colored ; sixth segment in female small, reddish yellow ; hyjw- pygium sliining greetiish black. Legs reddish yellow; the flrst and last two Joints of the hind tarsi black ; the hind tibiic sometimes with one or tAvo blackish rings. In the male the front tibiie are gradually di- lated, convex on the outer border below, gently eom^ave on the inner side, the outer angle below produced downward ; tarsi dilated, grad- ually narrowed from base to tip; the hind metatarsi in the male also thickened. Wings with a brownish tinge across the mid /^ ."^ii.. ///// ^^' V ^p ^ '4s 1.0 I.I I^|2j8 |2.5 ■^ IM 12.2 iM il2.0 nil 1.8 1.25 1 1.4 1.6 •« 6" ► V] w Hiotographic Sciences Corporation ^ \ V ^ \\ ». 23 WEST MAIN STREET WEBSTEH.N.Y. 14580 (716) 872-4503 [V 6^ '^ J ; ^ 58 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. ; i " , cheeks in front more shining. Face somewhat receding in profllo, tti tubercle inconspicuous; cheeks convex below. Antennae brownJN black. Frontal triangle poliinose, with black pile. Abdomen opaqi black; the first and flftli segments and the hypopygium shining grcc: ish black; second segment with a small rounded spot on each side ; tiiii segment with a large quadrate spot in front reaching to a little beyoii tiie middU'; fourtli segment similar, tlie spots scarcely reaching bcyon the middk^; fifth segment sliining, wholly without yellow. Front It- yellow, tlie tibiae gradually and nearly evenly dilated from the ba.st't the ti]», the external angle below not produced, metatarsi moderat( dilated, thence gradually narrowed to tlie tip; mi the legs with less black, and th j fore legs not dih^ted. The front in middle leg.", are wholly yellow, and the black on the hind legscontiin to a ring on the femora and tibijBand with the metatarsi blackened. Six males and one female from Colorado, four fcMnales and one nm from the White Mcmntains, New Hampshire, July 2o-.'i(), and one feiii,i from Pennsylvajiia (Keen). This species is closely allied to P. vha'topodus, but differs in the iim in the front femora not having the row of conspicuous bristly blm hairs on the outer side and in the spots on the fifth abdominal seguif; being wanting ; in both sexes by the spot on the second segment heii small, rounded, or snbtriangular. FlatychiruB peltatuB. (Plate III, tigs. 11, lla.) Sjifithux pellaiHH Meigeu, Syst. Btischr., iii,K:i4. Sco'va alhhnana Fallen, Syrph., 46, 19. Scaiva peliata Zettcrstedt, Dipt. Scand., ii, 747; viii, 414.'>, 50. I'latjichciriis peltatiin Stager, Kroj. Tijdsclir., iv, S'JO; Schinor, Dipt. Austr., i, 'H Habitat. — Northern Europe, White Mountains, Pennsylvania, >V York!, Sitka (Lw.). ^ , 9 . Length, 8 to 9™™. Metallic shining green. Antennae blai;ki« brown, the third joint somewhat lighter or yellowish below. Fa thickly covered with yellowish dust, leaving the tubercle and cliefi in front more shining ; in i)rofile, concave below the anteniuie, witli prominent tubercle and a smaller one below it, near the oral margi Frontal triangle bronze colored, but little shining, the pile black ; fro; with a slight coppery or bronze reflection; dusted on the sides belo dilated in the middle so that there is only a narrow shining space 1> tween the two. Thorax bright, shining, metallic green. Abdomen ; the male opaque black, shining metallic green on the flr.st, tip of fonii the fifth, and the sixth segments ; in the female wholly moderately s\i ing. Second segment with a moderately large yellow spot on each .-^ii; third ii tlMfei on the wUch yellow rtor p: thiekl.v eratelx dik^tec joint ii wliiti.sl at the vated, yellow, again, brown the ba sliglitl; ened; cept tlj ments ish. Two ftom til Also. Plalych Huhh i. I ered wi Antenii poUino.^ talhcg flrat se< trimgn ment in narrow th$| th wiaeue( fol^h i flf^ se gri^ni.s pypuni a small broad I liind ta USEUM. SYNOPSIS or NORTH AMERICAN SYRPHID^. 59 ig in profile, ft tk^^i imj fourth with hirger quaclrate spots, sit iiated on the front part ; in ennse browni, ^^ female these spots, except the first pair, are siualler, and in addition, bdonien opaqr oi^tho fifth seguient, there is r small, oval spot on each side in fn'ont, 11 shining grcc; ^ych is scarcely apparent In tlie male. In the male the front femora are each side ; tliii yeOowish, with more or less black toward the base, and ori their poste- ) a little be.voii ^f^ pj^rt for nearly their whole length there is a row of rather long, ■eaching beyon tygkly set, black pile; the tibiui yellowish, slender, suddenly and mod- )w. Front It-; eilitely dilated at the tip; the metatarsi elongated and extraordinarily rom the basei ail|ted, produced into an acute angle on the inner distal corner; second arsi njoderatt joi^t ., little dilated, the remaining joints not at all; the first two joints lUe legs yelld- ^j|tish, the remainder reddish yellow. Middle femora of the male bla(!k femora, the biivaj||j(. i)ase, otherwise yellow; below, near the mid«lle, somewhat exea- liirds joints, \> vated, and for a short distance with a row of short bristles; the tibiai yellow, on the inner sid«', just before the middle, suddenly narrowed, and sometimes wai; again, a little less suddenly, widened before the tip ; hind legs blackish a pair of spot- brown with yellow knees, their metatarsi thickened, especially toward The front ni the base. In the female the legs are simple, only the middle tibiae nd legs confim slightly narrowed on the inner side and the hind metatarsi a little thick- si blackened, ened; the first two pairs of legs nearly wholly yellow, the hind pair, ex- es and one hm cept tlie base and knee, blackish brown; the spots on the abdominal seg ), and one feiiia ments are also some what snuiUer. Wings hyaline, stigma light yellow- ish. tiers in the iim Two spocimens from lIollanrcle and chef "*****" black cross-band; third and fourth segments similar, except antenna' with *^*^ ^'"' ^l'"*^'** "''^ more nearly (juadrilateral, the black only a little Hie oral imr"i ^^®''^'*^ '" front, and the posterior bands a little broader, so that in the nile blacl" fro'^**'"''' •'^♦if?'"*'"t it occupies aboutone-thirdof the width of the segment; the sides belov *^ segment with two yellow spots, leaving only a posterior shining hining space l**^"'"^^' ^''•^^'' triangle, extending narrowly to the front margin; hypo- Abdomen Pyt^"'" '^'''"ing metallic green. Legs yellow; the middle femora with [•St til) of fomi ***"'' blackish spot toward the base, hind femora and tibiai with a moderatelv sIl^'^^^ black ring, hind metatarsi, except their tip and last two joints of )ot on each sin '^^'^ tarsi, black ; front t^niora on their hind border with a row of four 0. BULLETIN 31, UNITED STATES NATIONAL Ml'SEUM. §. >i I, i A! or five long bristly blacjk hairs, front tibiae gradusxlly dilated, tlie ini:i border more sinuate than in P. hyperboreun, tlie outer angle at tlict moderately acute, their metatarsi moderately dilated, thence gradual narrowed to the tip of tarsi ; hind metatarsi thickened. Wings fain; brownish tinged. Two specimens, Washington Territory. This species will be dist gnished from P. hyperborem, to which it is most nearly allied, by ti large spot on the second abdominal segment, by the presence in t; male o ' rots on the fifth segment, by the bristles on the front feiin of the male, by the external angle of the front tibiae not being ii; ducete nitidis, V rillosin; calyptris et halteribus cinereis, cUirii niffra; abdomine m opaco, albido lonye villosulo, maculin utrinque ttihiis triyonis, cinei seymento 5" nitido; femoribus anticis, .subfiis, lonye niyro ri Hosts, pc mt. This spi( Bigot, but as icture of the t well to rei)ro(h nto 3" Hubthsp oq'ie nitidis, J'l : ahdomine n' triyonisy vina o rillosis, pedi rmediis lati in LEUCOZONA. Leucozona Schiner, Wiou. Eut. MouatBclir., vi, 214, 18<50. lather large, thickly pilose 8i>ecies ; black, with a broad yellow baud afc the base of the abdomen. Head hemisi)erical, somewhat broader tbfn the thorax. Antenme porrect, short, third joint oval ; arista basal. Face in both sexes broad, yellow, with black cheeks and median ipe; grayish pollinose, pilose; in profile perpendicular, somewhat ►tuberaut below, produced considerably downwanls below the eyes, u'culate. Eyes pilose, contiguous in the male. Thorax scarcely loiger than broad. Scutellutu reddish yellow, translucent. Abdomen efi|ptical, depressed, broadest beyond the middle, not more than twice ai long as the thorax. Wings with open marginal cell, third loiigitudi- veiii very gently curved, small cross vein near base of discal cell, ftposteriorcell t. Stand., ii,77H, and viii, 31(i(>, 1. Cheiloxia lucorum Walker, In.s. Urit., i, ^f^l, 1 ; Curtis, IJrit. Ent., 753. l.rncozoud lucorum Scliiner, Wi«!n. Ent. Moiiatsclii'., vi, '214 ; Fauna Aiistr., i,: Hnhitaf. — Wa.sliiiigt()ii Territory! (JtiHiula (O. S.), Nortlicrn and C tral Eiiropt'. (J , S . Loiigtli, 12""". Ant^eiiiia} black, third Joint oval; arista bl.i Faw gently concave l)elo\v the antenna;, tlu; tubercle larf^e, obtii by Ro arftt.; ] all the pabeH( H.), ai or Don sabord oiithe nMrely aii4 dif 0[^ior «Tli nearly as low ollen loiiv «# *^Jp^ three slender black stripes. Pile on the ])lenra' white, on theijcntelli K«|fcKo bushy yellow or oran<.'e. Abdomen black, shining', the second sejiiin « rut..] either wholly li{,rht yellow or wholly snb-opa(iue bluish p;ray, or li: ^j j^^ yellow in the middle part and bluish jjray on the sides, with a slcm «^u^ < black stripe on the middle ot reacliiu}; the posterior margin; pile leu gggmf. * abundant, yellow and black. Legs black; tip of fenumi and base o|»(^p,„ tibite whitish yellow, sometimes almost wl.olly yellow. Wings iiyli ljeiicoz( with a bljickish brown si)ot, reatdiing from the ba.se of third poster ajj^gni,. cell to the stigma ; stigma darker. me in t Two S specimens, Washington Territory, Colorado. jimi; j^ It is t CATABOMBA. of his . tumid t Laniophlicus Tiondiin'i, Prodninie, ii 137, 1857 (ex parte). i- iqo,. Caiahomha Osten Sackeii, W.5, 1877. ' '' except IJather large species, closely resembling in appearance find ^ti'"*^t[^ - . . the genns Syrphus, except that in the male the eyes have •"' 'ii'^''' OatA < etdarged facets above, the front in both sexes remarkably convex, ii,,^. , * ' naiiie, h the hypopygiuin of the male is very small, concealed entirely '><^''i''''|.«|wi . ,. the fifth segment of the abdomen. Type of genus, C.pyrnslri Linii' In resxjouse to a I'eciuest in regard to the claims of Lasiophticus Eon CaUbou for priority over Catabomba, as put forward by Uigot, Daron Us: j*^" iSacken has kindly given me his views on the retention of Cataboiiii Mhich 1 take the liberty of reproducing here nearly entire. '•The genus Lasiophticus was characterized by Ivondani (Pmd. 137), thus: 'It shares the characters of Syrphus and Platychirus. ! ditlers from the former in not having dilated front tibia? and tarsi, ti' both by more or less pubesceut eyes.' Eleven species were eiiumoraii Mil Sijr Siir Si/r \ i [l\ IU8EUM. SYNOPSIS OP NORTH AMERICAN SYRPHID.E. 63 St., iv, 291, 46;.\| lljf Roudani as l)t'Jon{,'ing to Lasiophticns, iiKjluding the so called topi- 4tliuj M. (my S. torvux), glaticiua F.,pi/rasiri Liu., etc. In other words, •if the European Syrplius (in the restricted setse ofSchiner) that have T, / T; r.' lrttt)esceiit eyes are Lasiophticns Kond. (see Schiner, i, 301). , Ilist. Nat. Dipt *^'T^ •' . .' r, , ,i» T^ ;<*>.'ow I have shown in my paper on Syrphus (Froc. Boi Bost. Soc, N. , and, before me, Mr. Malm has »/ms/n and con t- "naijie, however, in itself might become strongly objectionable. Cer* ,50, 1 ; ZcttciM. ■jUt., 75:5. i-'tuma Anstr., i,. irthern and C L-al; arista bl^ le large, obtii> jlor concealed sh white pile, i j, , frontal triiiii. gradually Ixci •overed witli it )wn i)ollen Iciiv ^^ on thejjc^uti' I' second seg s!i gray, or ;>s, with a sleiit largin; pile Idi entirely beiu; tailily the pilosity of the eyes is not a generic character. piprfntri Liiiii siophticus K()bCat«bomba pyrastri (I'liito IV, li-s. 1,1«.) ;ot, Daron U.< m of Cataboiii it ire. Dudani (Prod. Platychirus, I' » and tarsi, li'i were euumerati MuKca puraHtri I.iiiinS, Fauiiii Slice. , t^lT ; .Scn]>oli, Entom.Carn., 931 ; Schrank, Eiiiiiii. Ins. AiKstr , 417, ;t()7. Mii»ca roHfv Oogeer, Ins. vi, (!; ]il. vi, li, ;}; Fallen, Syrph., 39, 5: Zetterstedt, Ir Heanil., ii,T()3,aii(l viii,313'v'. Scoira traimjiiiia F'iihriciiis. Antl.,ti50. .''>. Scara offiiih Say, J. Acad. IMiil., iii,9i), 9; Coiiipl., ii, 81. SyrphiiH a()inin WifiliMiianii, Aiix.s. Z\v. lut\., ii, 117. 2. Laniophliciin pjirunlri Koiulaiii, Ann. d. Acad. d. Anjiir. Nat., ill. Culahumhii piiratitri OsttMi Sackcn, Wi'.stt'i'n I)ii)t., Iltii'i. Habitat, — Kiinsas, Colorsulo, Wyoniiii};, Wasliiiigton Territory, i «gou, Utah, Arizona!, Scandinavia (Zctt.), Enjiland (Walk.), Genus (Schiner), France, Al};iers. CUiili (Macq.), Italy (Kond.), Canary Islai (Webb and IJerthelot). (J , 9 . Lenjjth, 11 to 12"'"'. Face liyht yellow, somewhat bluish o| bidenl escent, often in dried .specimens with a reddish tinjie, a brown s])u\ "®' ^^^ the tubercle e.xtending more broadly to the oral margin ; i)de abundii •*"* *^' whitish. Cheeks jjreenish black. Antenna? brownish black, often: ^•'Ki on the under .sideof the first, second, and the third joint nearthe lia ^^Wlire arista r«.d. Front yellow, with a slender line reachinj^' from the antci. ■*»»•<'*' to the vertex or commissure, on each side of which the front is broii. Hubtranslucent olivaceous, the vertex black ; pile black, in the ii; longer and n^ore abundant. Eyes of male contiguous for about liiil: long a distance as the length of the frontal triangle ; posterior oii whitish polliiio.se, and with a fringe of white pile, longer below. Tim: Odorai shining greenish black, the humeri and post-alar callosities somt'tiL 0 , 5 reddish ; pile white, rather long and abundant. Scutellum yellow, y cheeks translucent bluish opalescent, the pile in large ])art blacULsh. Aluloi, triwigl black, subopaque, with three jiairs of arcuated whitish yellow sjn corbss rather narrowly separated from each other, and more so from the lau pollen ] margins; the spots on the third and fourth .segments arr obli«]ue,(ln yellow, concave in front, gently convex behiml, inner ends rounded, appios ant^nii; ing the front borders of the segments, the outer ends broader, truiic, tim^s s fourth and fifth segments narrowly yellow behind; the first segintyellowi the hind margins of the second, third, and fourth, dilated in th<; niidi sontelhi and the remainder of the abdomen, more shining, soineM'hat metii>8nb0pa( Legs reddish yellow ; ba.sal half of front and middle femora and the li:th6||egi femora, except the tip, black; all the tar.si brown, sometimes black: twdlj'el the metatarsi often redreceding; * in the male the sixth abdominal segnicnl as long as the two i»receding segments taken to- getber. but narrower, convex, almost tubular when seen from above, mnynnnetrical, the end jiointing slightly to the right; the seventh seg- ment bears the anal opening on the under side of the sixth; beyond thi anus there are tv. o long slender subparallel appendages, arcuate, Irfdenticuiatv at the end, nearly as long as the sixth segment, bent un- defe the b« fly when at rest, and end)edded in a horny groove on the under •ide of the sixth segment, whicli encroaches on the tifth. Legs simple. i; i)ne abundo . ,, . ^, , ,. ,. , ' ' . ,. , , Marginal cell ot the wing oi)en ; small cross- vein near the base ot uiscal ■ ti "irthebi «eU,rectangular; third longitudinal vein gently curved. Type of genus, Lnuhe ant.'.', ■»' •^^"'''' ^' ^- e front is bim aofieodeB volucris. (Viae, III fi-^s. 11,14m.) lack, in the Ui *'' EuiwoiUa volucrin Ostfu Sackcii, West. Dipt., 329. < for about hilll SiirpI ii8 perpallulns Bigot, Aiiiiiili'8 Soc. Ent. Fr., 1884,90. • posterior oii Mahitnt. — Washington Territory, California, Nevada, Utah, Kansas, pr beh)W. TIki: Colorado, New Mexi<'o, Arizona ! losities sonu'tiL ^,?. TA'iigth, 7 to Kt""". Eyes bare. Face whitisli yellow, with black ellum vellow, V chlJtks and a brow n (»r black strijjc over the facial tubercle. Frontal icUish. Abdoii triangle whitish yellow with some black ]»ile ; front in female black, tish yellow s]* ccross the middle a faint subinterrupted arcuate band of whitish so from the latt pollen leaving a triangular shining space below, lower part of the front •■ oblique, 6. .iHcycloHiiriihtiii HiK»t, Soc. Eiit. Fr., IWHJ, Hull. Iiiincns., No. fi, 78. iHclinruHyrphiiii HiKot, Soc. Eiit. Fr., iHH'i, l^iil. Iiiiiifiis., \o. (>, 7H. Me 16.— Sp dents who shall nudvo large colle(^tions aui, var.) . . . . •.— Easi.Tii Hii.'.i.'H amalopii Wi'sti I'M siK-cieH Intrudens 7,_I.'r(iiit in fi'inalo ItriKiil ; tlie al)«loiiiinal HOotH, as a riilo, do not rcacli tlic niaryin; liiiiil mctaliiiNi of iiialcdiNlinctly HwolliMi ; facj-projectln}; lielow . conttimaz Front in frnialc no! iiniiHually 1iioa«! 8 8,— Tliinl antfinial jiiiiit sriicfly Inn^ccr tlian broad ; fac«< with an iniliNtinct lilack Ntripo; second :;,i it third alMloniinal sjiotH do not rcaili tin- lattTa! niai^in; thi« liiHt pair not IndachT aodalis Third anlinnaj ,i"lnt idiiNidfiahly hmm-r tiiaii liroad; facn with a diHtinct Itiiiek .stripr; ali
  • niinal spots narrow meiitalis Third antinn:.! Jiiinl Dval ; first pair of ahdoniiniil spots very lar;;i'; eyes thirkly pilnsi' velutinUB ir, proilllt'cu I g__j^l„l,,i,ij„„l ^|,„t^ ,,f tliir,! ,111(1 fourth Hi'KnientH diijtinftly arcnati'd . arcuntus ,ll il black llHil Aliniina! sjiols strai^lit, trausvcrso 10 tllb'-TcUi obtll' 10.— l"a<'' niinsinilly pnijcci in;; lulow, the distaneii from verti'X to antenna' siarc liy •ihVilViS rec»'tlM ;iniilir than from ilicntc to tip of tuhcrfh) geiiiculatuB rivVir"-0 inotl. Fnio not nnusiially project iiiK Im'Iow 11 " ' ' 11,— Face Willi a Mackisli strii>e; all tlie ali'loniinal spots of nearly ecpial width . umbellatarum ' Face wholly withcMil a Itlackish stripe ; lirst ))air of abdominal spots small, sei-- (ind ami third pairs lar;;e, nearly sr|uart> disjectui 12.— Aluloiniii narrow, with nearly parallel sides in tho male ; in the fi'unile, the \\\'\]\ segment half as lon;^ as the fourth diversipes Ahdoinen distinctly oval ; the lifth sej^jnient in tho female less than half as Inn;; . f), 78. ). (5, 7a. )r metallic ^vh 1(1 Ih'niisplurii ma- shorttT tli rer than tlic tl: 1 stripes. Scut I bluish or },mi> times with ma: )re than twice tij; nearly strai, of .ase Femora yellow at the base 14.— The 13 14 20 ind and third abdominal cross-bamls do not reach the lateral niar^rin 15 The second and third bands reach the marKiu 18 IS.— Eyes bare 16 Eyes pubescent ; the sjiots on the second sejrincnt separateil from the later.-il niar^^in ; the second and third bands bilaterally oblii|nu . . lotus (lone bv locill > 18.--^P"t** on second se;imcnt not reachin^j; the later.il inar;;in ; cheeks black, ^1 *i. «,.,..! ,; americanua them thoroii^i * *♦ ,n i * i ,„ "Tue band or spots on sccoud segment attains the lateral margin .... 17 on. AH but t ly ..^,„.^^j, ,,,,jj,,. abbreviatusc? been examilictl Cheeks yellow opinator ^er part of BailB.— Eyes pubescent torvus ditions append Eyes bare 19 19.— ^ho cross-bands atttmuated at their ends ribeaii Cross-bands reach the sides in nearly their full width Lesueurii 20.— Tho second and third abdominal cross-bands attain the lateral margin . . 21 The second and third bands not (|uite reach tho margin 23 21i->/rhe sejond and third cross-bands attenuated at their tips ; face and cheeks yellow, protrituB (7 , 9 ribeBii , ami viii, :»i:!8, 'Z'i. Syrphiia arriintiiH Moijjoii, SyHt. Ht'sclir., iii.ItOi, 4li ; Miu<|iiiirl, Hist. Nat. Di| i, :..'{»;, C; Walknr, Iiih. Urit., i,2Hl»,8 ; Schinor, Vorh. Z. ]$.(}<•«., vii, ;tU; : Fauna AiihIt., i.lJO'). Scara lapponira ZHtttTntodt, Ins. Lapp., 598, *i (1838). SyrpliHH lappoiikua SvUiuer, Yi'T, Z. M. Goh,, vii,;i4l ; Osten Sack«n, Proc. Dm Soo. N. IL, xviii, 149; ith of tlie fiftii abdominal se;;- "•on, Washmgi '.' ,,...., -^ " ' mem will at once (listin;iiiisli it. tory (NNa v.). it^syrplius nrcuriiKliis Walker, List, etc. (Hudson's I5ay Territory), i.s ^v; iimei . ■ represcnteil in the llritisii ^Museum by two specinicns, one of which i.s Proc. Am. PhiLS' re shining gn^ my iS'. iiiiKilopl.s; the other belongs to the group of S. hipponicm. The retl( IS . . ([^jg0j.iptj,,|| is drawn from the latter spe(!iiiieii, the alMlominal spots of ist; pile black ^^ ^„,,,„.,i^ l^,^.i„„. „„,,.i, „ioretlian 'slightlv curved.'"— O. S.. Cat. Dijtt., laes dissolved i; ^^^ ' ' iiinediatelylH witll black 1 Syxjhua nmalopis. lowisli pollim ''- 'S.'/'7'/'"s umahpiH Ostcn Siickni, Proc. Bostou Sue. Nat. Hist., \\ iii. It"', I-**,'!, rrowly sepiiia: jfabitat.—W'hitv. :>[ountains. New Hampshire (O. S.), (.onneetieut, '>'»*'l^'^^'*^'^'" New. Mexico! "4,9. lOtoll""". 'Olale. Eyes pubescent; face of a dingy brownish |w, with a broad brown stripe in the middle (its breadth is e(pial to rauslucent, win Abdomen bla lots, a 1. imlf^f its length or more); cheeks black, with a greenish rellection; a ittle mor ' hlai^, broad, oral border; antenniB black, front and vertex likewi.se; ate o\ a ; ^"^ faolll tubercle salient. Thorax dark metallic green, clothed with black onvex )e inu . pji^ mixed with fulvous on the sides and near the scutelliim ; the latter ^^''^^*^'^' "^'Jdnlltyellowi.sh brown, with metallic redections, be.set with lilack pile, he anterior ail? j^jj^,^jjlj a blackish border and corm'rs. Abdomen bhick, very little ; baseot ro gi|ij||ng. o,j the second segment two oblong yellow spots ; on the third I, black; f^ '^"'•an^yFourth segments a pair of lunate spots, club sha])ed on the inner nts (or, excep end|truncate on the outer, and considerably excised in the middle ; the line, subcosta fQujpgj ,j,„| jHYh segments with a narrow, yellow, iiosterior margin : all thejfellow parts are straw colored. Legs black, tip of femora and ba.se y straight, oi ^'of |f|ir,. ydiowish brown, the extent of this brown being much less on theqiiKl i>air. Wiiiys distinctly iiifuscatiMl. 70 nUI.LKTIX 31, UNITED STATES NATIONAL MUSEUM. I ! .iV I u I ' i^ \\ \ Fcnial*^ Front aud vertex metallic greenish black ; spots on sccoi segment cosirctate in the middle, those on segments three and fonnl solved in two, so that these two segments show each a transverse f of .yellow spots, nearly of the same size and equidistant ; the flftli ,y ment has two spots at the base ; the wings are hyaline. In all otL res|H'cts like the male. Two males and one female. 1 have not the slightest doubt that these males and females Wh together; the ditt'erence in the coloring of the wings has no importaiu as to that in the coloring of the abdomen, I shonld not wonder if i: species proved to be very variable in this respect, and if interniedi stages occurred between that where the lunate spots are entMo a wheie they are dissolved in two. The nbdomen in this s])eci('s is m, convex broader and somewhat shorter than that of »S'. htpponivus. In the specimens described above, the yellow abdominal niarkii do not come in contact with the lateral margin. But I have a ])iiit specimens {i , 9) from the same locality in which this contact occi; In the female the spots are also cut in two as they are in the typi specimens." — Osten Sacken, 1. c. I have three female speciiiiftns from Connecticut (June 11), on b: soms of Prunus virginianus, that seem to be intermediate between t species and the next, *S'. {ntrudens, but agreeing rather beLtsr witii description of /S. intriidens. The facial stripe is black, narrower tl the yellow portion on the sides. The antennte are wholly reddish low; in one specimen only, the third joint is brown ; the front has a vL pollinose interrupted cross-band ; the pile of the scutellnm is partly "wholly yellowish. The abdomen is very shining, all the spots attain lateral margin, those of th^thirdand fourth segments are, in one sjv men, only deeply excised, in the other two specimens dissolved into; spots; the spots on the second segment are broadly oval and not at excised in front. The legs are light yellow; the front and middle ten at the base, and the hind fennora on the basal half, are black; the 1 tibijB with a brownish ring, and the hind tarsi in one sjiecimen bic ish. A single female from New Mexico (G. F. Gaumer) seems to w: broa perfectly with the description. The spots on the tirst segment iiit -^{^ cised in front, and those on the third and fourth segments are not bl^^Ii in two and reach the lateral margin distinctly. The sjx'cnes, as (V color Sacken says, is evidently a variable one, and I am inclined to doubt ^,^^, validity of N. tHn, West. Uijyt., •'-*', 1877. Habitat,— CiiWi'onuii (O. S.). "Length about 10""". Male. Eyes pubescent; face brownish yd with a broad black strii)e in the middle, abbreviated before the antti and narrower tlian the yellow jiortion of tiie face on each sideo; the black is prolonged along the oral border to the black cheeks, vl scatc hairy, spots, indist ment.^ blaek Femo V \ MUSEUM. ; spots on so(!(j liroo and four i! 1 a transverse n \nt ; the flftli st line. In all otl. id feniales bdd: Ills no iniportaiii not wonder if t; lid if interinedi, ts are entni' . liis si)ecies is m <. htpponivus. doniinal iiiarkii It I have a iiai: iis contact occi; are in the typi (June 11), on b: diate between; ler 'vetter witli iick, narrower tl wholly reddisli le front has a AvL itellnin is partly the spots attain ts are, in one s]). ■(dissolved into: oval and not at and middle fen ire black ; the li le specimen bic nei) seems to a? rst sefjment aiv '•iinents are urn ': s])«'(Mes, as ('< clined to doubt SYNOPSIS OF NORTH AMERICAN SYRPHID^.. 71 ce brownish ytl belore the aiitii on each side o; ilack cheeks. \^^ ive a slight greenish reflection ; antennae black, third joint some- times slightly reddish at the base ; front and vertex black, with a green- ish letlection and black pile ; occiput beset with a fringe of fulvous pile. Thorax dark nietalli(; green, clothed with fulvous pile, especially «ou8picuous on llie pleura'; siMitclliun with a shade of dull yellowish QDder tlie strong grreiiisli metallic luster; its pile is black; a few ful- vous hairs on tlie sides only. Abdomen black, very little shining; on the second segiMcnt two oblong yellow sjiots, not reaching the lateral margin ; on the third and fourth segments a pair of deeply lunate spots, club sliaped at both ends, touching the anterior margin on one side, broadly contiguous to the lateral margin on the other; the deep (ex- cision on them has a triangular .shajje ; fourth and fifth segments with a narrow yellow posterior margin. Ilalteres with a lemon yellow knob. Legs reddish; anterior femora black on their proximal half; hind feni- Oira blairk, except the tip; hind tibia' with a brown ring in the middle, the otiier tibiic also slightly niarkeil with brown; tarsi brownish above. Wings distinctly tinged with brownish; stigma brownish. flir"e males, April 15-20. ery like Syrphm amalopis (). S., from the White Mountains, New Hampshire, but the pile on the occtijuit is bright fulvous, not pale jeUowish white; there is more tulvo:is i)ile on the thorax; the ab- dominal spots are a little larger, their inner club-shaped end more dnnisy, the emargination deeper ; the legs are less dark colored; the facial tuliercle less prominent. Nevertheless, the resemblance is very Striking. S. amalopis seems to be a very variable species. The same variations may occur in iS. intnidens.'''' — Osten isacken, 1. c. Sjlphus contumax. Si/rphus contumax Oisteii Sackeii, Proc. Bust. Soc. Nat. Hist., xviii, 148, le??5. Si/rphuH adolcaociix Walker, List, etc., iii, .')84. Mal'itat. — White Mountains, New Hampshire! '%S , ?. Length about n,.^""". Eyes distinctly jiubescent. Face with alluisii reflection, sometiuuvs almost concealing the dull brownish yel- lo^ ground color. Cheeks and oral border broadly black; front very briiad in the female, black, clothed with grayish jioUen ; in the nnile with a bluish reflection. Vertex greenish black, metallic. Antenna; black, inserted on brownish yellow ground. Thorax greenish bronze ool^r, with indistinci longitudinal stripes of an opaxpie brownish; dor- 8I1SI beset with brownish; pleura' with brownish fulvous erect pile; scutenum dull yellowish, with a bluish reflecttion. Abdomen black, very hairy, with three pairs of oblong, transverse, straight, brownish yellow spots, which as a rule black. In the female the femora are black at their bases only ; win;; hyaline, sometimes tinged with brownish ; stigma brownish, third loi gitudiual veir. nearly straight. Three males and two females from Mount Washington. The facial tubercle in this species is very salient, the whole Iowk part of the face somewhat projecting, the front of the female conipar,, '^\ veite: fhebi tion, < taber( postei iug. il tively broad, the first joint of the hind tarsi of the male distiiicti baset swollen. The general appearance of this species is ditierent from a , . . ordinary Syrplius." — Osten Sacken. a, a t) ^^ Si/rjihus adoleticens is ie])resented in tl>e British ^Museum by tliii f u„- specimens; one belongs to the group of S. lapjmnicKs, tlie other (Im. ^-.^i Nova Scotia) is S. amen'canus., t\w third is my S. contunia.r. Tiled. ^ . ' ne&T t scrii)tion was i)robal)lv drawn from the latter, though it is very uniiieii; _„_-i iug."_(). S., Cat. Dipt., :*4r>. thefr( a litth margi red(iis hindf hiti#t Syrphus mentalis, n. hj). Habitat. — Washington Teiritory! 5. Length, 0""". . Eyes pubescent. Front shining black, extendii down on the sides as far as the insertion of the antenna', but the latti inserted on yellow ground ; across the middle of tiie front with a rntln narrow, i'lterrupted, yellowish pollinose band; jiile Idack brownish black. Face yellow, the (cheeks in front, and thence to the mi die, along the oral margin, and a moderately broad facial strijie, loiH; ing acutely to the base of the antenna', black. Cheeks behind, a; across behind the mouth, yellow. Thorax shining greenish black, i the pleur;x! with whitish pile. Scutelluiii dark, subtranslucent, oiilv little yellowish, with black lule. Abdomen broader than the tliuin shining, with three pairs of slender spots ; first pair more broadly sij rated, their outer eml attenuated, cur\ ing forward to meet the latti margin ; second and third pairs scarcely a fourth the width of the si, nieuts, interrupted by about their own width, reaching nearly or (]ii; to the lateral margin; fifth and sixth segments wholly black. Lc dark yellowish red; base of all the femora (on the hind pair incliiiiii the larger part), and the hind tarsi, black; the hind tibiie excep! tl base, and the front and middle tarsi, brown. Wings lightly tinged wi; Bjfjfhxi brown ; the stigma brown. One specimen; an additional one in the Museum of Comparative Z ology at Cambridge. JEfab The front in this species is rather broad above, and the abdoiiiiii i,$ spots are unusually narrow. Ante.iii Wiifg.' Wan l*e tiniBtly the bti N(»rth Hifttor It diff nafiov veriiel: except more s sid«B€ spe^e^ f S: i, L Syrphus disjectus. Syrphitu diKJuyictits WilliHton (noii Macqu.art), Proc. Aui. Phil. Soc, xx, 314 (1 ■■ Habitat. — Washington Territory ! i . Length, 1) to 12""". Kyes bare. Frontal triangle shining iiietal! greenish olack, narrowly yellow along the eyes, the i)ile, and that ot tt Fnmt ish bla blatoh ten^in, of ^e sUibtl \* il *^ MUSEUM. ish yt'llow ; tar. ases only ; win;- wuisli, third lot ton. the whole lowe female conipar,, male distinct! lifferent from a: MusiMini by tliiv , tlic other (lin itHOKi.r. Tlu' (1 t is verv uniiie;;: SVNOI'SIS OF NORTH AMERICAN SYRFHIDVE. TS black, exteiidii la', l)ut the liittf •ont with a ratb blaek. Antciii: :henee to the mi eiai stripe, rein eeks behind, a: reenish black, i anslncent, only than the tiioi.i ore broadly sc] ) meet the late: width of the si, g nearly or (jn; dlv black, h: id pair inclnilii tibiie except ti Hhtly tinge der arch, immediately above the antennas yellow; i)ile of front li Lateral ])osterior orbits thickly grayish pollinose. Dorsum of tlin dei'jt shining green, with light yello-., ])ile. Scutellum lid»t yellow subtran^lucent. Abdomen broadly oval, shining black ; the ci bands yellow, interrupted. Tiie first pair of spots is more broadh > L. MUSEUM. le disk, where i ., the sides and 1 ,' broader than d sejjinent ; ojia segment, arated, and have a slender anterior prolongation that reaches quite to the lateral margin; the second and third pairs are less widely sepa- rated and the outer ends are distinctly cut otlfrom the lateral umrgins; the spots are on the front part of the segments, moderately broad, their inner ends nearly touching the front margin of the segments; they are very slightly obiiqne in position, gently concave in frou and convex behind, then- outer i)osterior putts rounded ; fifth segnitnt with a nar- row hind margin narrowly interrui)ted, and coalesceut on the sides with the yellow of the next segment in front; the fifth segment also ■with a slender yellow hind border. Legs black; «listal half of front and middle femora, tip of hind femora, broad base of all the tibiai and tips of four front tibia', yellow. Wings hyaline; stignui light yellow. One specimen (II. K. Morrison). Byiphus lotus, II. H\y. Mabitat.—Aiizouii ! t. Length, 10""". Eyes pilose. Face and cheeks yellow, the former, in ttie single specimen, of a strong green tint ; a facial stripe, not reach- ing the antenuie, brown. Front black, grayish-yellowish dusted across the middle, leaving a large oval sjiot below, and the vertex, black. An- tennae brown, the third joint below near the base reddish. Pile of front wholly black, of theocciput light yeMow. Dorsum of thorax deep green, in front with two grayish poUiiiose stripes. S(!Utellum subtranslucent ob- BOnre yellow, the i)ile chietly black. Abdomen but little shining, black ; the Lands all distinctly seimrated by •: black interval from the lateral margiis; first cross-band interrupted by a small interval ; second and third bands bilaterally oblique, cut off" squarely at the ends, and touching the front bolder for a considerable distance in the middle; on each side in front a little concave, on the sides behind nearly straight, or gently convex, the two siloied scutelluni, etc. I; i * t' ( i^ ^ 76 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. SyrpbuB diversipes. SyrphiiH (liversipeH Miio(|imrt, Dipt. Exot., 4' Sni>pl., lo.'i, 54; Osteu fi.v Priic. Host. Soc. Nat. Mint., xviii, 141), IHTf). T SyrphiiK diictcllim Zi'ttorsti'dt, Dipr. Sciiml., ii, 7\'2, 4."). .^ ftoni domii cediii Syrpb ''^"hitat. — White -Mouiitiiiii.s, New Ilaiiiitsliirc, New York, Wasli ton Territory!, Liike Superior (O. S.), New l-'oniKlland (Macc].). 3,9. Leiifftli, i)""". "Abdoineii narrow, with nearly i)aralU'l si first segment ( $ ) grecMiish bhiok, with more or lessyeUow anteriorh opalet on the sides; in tlie female the yellow prevails, leavinj^ only a met quite j;re(Mi spot on eacth side, wliich often is subobsolete ; the followiii- small sejiiiients have eacli a yelloM' cross ban ! (»n their anterior iialf; tin lower cross-band is broadly inteniiptecl : in the male tin; interruption • browii the .shape of an iu\erted bhick tiian^ile, exi)andin;;' anteriorly so;, thean occupy nearly the whoh- anicrinT- marj;in of the .sejiiuent; in the fti befcwe this triaiifile is narrowband occupies but a small jiortion of the aiiti with 1 marjiin ; thus in the female the yelhtw of the cross band coalesces ■ pile^ ihat npoTi th(; lirst sej;inent ; the following;- cross bands areentiiv. side^ second and third nearly of the same breadth and not attenuated oi! the fir sides; the fourth band in the male o<;cnpies neaily the whole scliu fornlec except a bhuik semicircle ])osteriorly : in tlu' fennde it occupies tin abdom terior half of Mie seii-inent, and is art of the jih costlU clothed with yellowish jtollen. Leys yellow; outer half of the istraigh femora (sometimes i^early the whole hind femora, ex(!ei)t the base),: F^nr tibice and tarsi brown ; knees yellowish. \\'in;;s with a brownish si onlyin ou the apex, usually distinct in the female, often nearly obsolete iii^n th<^ male. 3aoken Ten male and thirty female specimens. Two male specimens ligyrphui the four anterior femora distinctly infuscatcd at the base. m 8. cinctellus Zetterstedt, is vt'-y like this species and probably idi .Sy cal M'ith it. His description ajfrees with the North American sp' .xl mens. A European specimen in the Museum of Comparative Zonli f named by Dr. Loew, does not show any dilference worth noticiiif; Osten Sacken, 1. c. Two male and sixteen feu)ale si>ecimens from the White Mouiitu New Hampshire (.lackson, July 25), aji'n-e fully with this descripti a sinj>le female from the same locality has, ''owevei', the lirst ai)(l> ond alxlominal sefiinents as in the male. A sinjile female from Ur ington Territory agrees throughout. My female specimens li;iv peculiarity, not noticed by Jiaron Osten Sacken, wherein they d MUSEUM. SVNOl'SIS OF XOUTII AMEHK'AN SYIM'HID.E. Tt 55, 54; Osteu Sai flponi all tin- No'tli Aiiicrican Syrphus known to nio, vi/,, tlic fifth ab- dominal so^rniciit is unnsiially lonj,', more than half as long us the pre- ceding, a},MO('in{j in this respect with Eupeodes, iw York, Wasli a (MacMj.). arly i)arallf'l si- ellow anterioii' Syrpbus protritiia. • SjiriihiiK j>folritii.t Ostcii Sackcii. WeHt. Dipt., 328. Uflfc/^f/.— Caliioniia ((). S.) **i. L(Mij;tli, 10 to 1-""". My.'s ylabrons. Face yellow, with a bluish opaleseencc ; on the checks a lar;ie blaekish ii*j)ot below the eye, and not inj; only a imi qaite reachiiif; tiie oral niarfjin (it is variable in size, sometimes very the following; small ); tin; lower edge of the head behind the month and between the erior half; tin lower ends of the eyes is again yellow. Antennse red, sometimes faintly interruption i brown ois the upper side of the third joint; front brownish yellow above anteriorly so; the antenna-, black, slightly pruijiose, and with black pile in the corner, lent; in the fci between the eyes; vertex black, with black pile; occiput grayish, beset tioii of the aiitt with i)ale hairs. Thorax dark bronze green, beset with dense yellowish land coalesces pile.. Scutcllniii yellowish, with black pile, some yellowish hairs on each iiids are entiit. side. Abdomen black, opaque, with three reddish yellow cross- bands, t attenuated on the first of which is broadly ipterrupted; the two yellow spots thus the whole se^ni formed .nv prolonged along the lateral margin to the very base of the 1 it oc(!U]iies till abdomen; the second and third bands reach the lateral margin, being 1 distinctly iioionlya litth^ attenuated before it; they are biconvex posteriorly, witli an 1, sonu'tinu's Itn anjinilar ciuargination in the middle ; fourth segment with a yellow bor- s black sjiot i- der posteriorly; the fifth red, with a black triangle in the middle. Legs •st of the from laltogetlicrieddi.sh, often a brown shade in the middle of tiie hind tibifo as of the preci and on the liiiid tarsi, femora red I'lom the very base; coxie and trochau- cutelliim ye]lo«ter8 black. Wings subliyaliiie; their root tinged with brownish, the •art of the [ili costal ecll with yellowish; stigma brownish yellow, third vein nearly r half of tlif i straight. i;ept the base).: 'Ppnv males. Is veiy like the common S. rihcsii of the Atlantic States; :h a brownisli sianlyin that species tlu- male has black hind femora, the black spot arly obsolete iii^n the cheek.s is smaller, and the antennai are much darker." — Osten 3aoken. I. c. lie specimens li3yq;Ausribesii. l^f^*^*-'- ''.;ifH.>(((( r(/jM;)T,iiin('.Fann;i Siicc, liSl()(l78l); Sehrnnk, Eiiiuu. Insect. An8tr.,905. nd probably W. ■SyrplntK rlbcuH Liitnillr. Hvn. C'nihit., iv, :)-J5; Faljricius, Spec. Insect., ii, 432, 57; ll American t^Y -k ''''''^<""- '^.V'*'-' i^'- -'W; tOO; Mei<;on, Syst. Bt'sclir., iii,:50tJ, 4'.); Walker, Ins. mparative Zool., "l ^^"^•' ' -""'' ' ' ^~''^''" ^"'^^'^•■"' Cat. Dipt., 12:J; Scbiner, Verb. Z. B. Ges., vii, ;{l(i; Fiiiina Aiistr., i. ;U0. Scwva rihcHii l"al)riciiis, Aiitl., '24>i, 1; Fallen, Syrpb., 40, 6; Zotterstedt, Dipt. „ Scand., ii, 707; ildd., viii, :!1;W. ^^-.Syrphii.i reciiis Osteu Sackcn (uon Xovicki), Proc. Bosl. Soc. Nat. Hist., xviii., "^f Sijrpluts ])ltil(i(Mi)hi('un Maciiuart, Dii»t. Ivxot., ii, 2,93, 11; tal).. xvi, fig. 2. /af.— Eurojie, Atlantic, Middle, and Pacific States! Ip . Length, 7 to 12""". " $ . p:yes glabrous; hind femora yellow, ^vherein they ,i>™*^^^*^ '^ ^*^"^^^" '''"^' ^^^^^^*^ ^^^^ ^^P- i . Eyes glabrous; hi'ul femora black, except the tip. worth noticing White Mouiitii: h this descripti r, the first aiid- female from ^\ r specimens li:iv ■-■>'' 4i fS BULLETIN 31, TNITED STATES NATIONAL MUSEUM. •■ ( ( I m I'.i .1 '■ I M !■) Ii' I ,; Female. Very like tbe female of S. torvua; the differences, as git Iq above, coiusist in the entirely glabrous eyes anil the femora, whicli |g ^itX yellow from the very base (coxa^ black); in niost si)ecimcn8 tliolifeoei femora have a brown rinjj before the tip. j im^ The si/A', as well as the shape, of the abtloniinal stripes are very v;i;the E ble (the female of »S\ torrus shows, in both respects, much less variati the ai lietween tlu^ followinjr two extremes all intermediate stajjes occuv, bandc (1) The smallest specumens, from 7""" upwards in length, havtrowly yellow stripes on the third and fourth segments (piite straight, tidclose. tenuated before coming in contact with the lateral margin; theirltennie borders show no perceptible convexity or concavity ; such spccin that t usually have a distinct brown ring on the hind femora, a little ))• Osten the tip. S. rib (2) Larger specimens, up to 11 to 12""" long, have the stripes diuona ] third and fourth segments, with a distinctly biconvex hind margin, which a sinus in tlie middle; these stripes are distinctly attenuated on men ft side, before reaching the lateral margin. Such large specimens Ijlaok; have no brown ring on the hind femora. jncts; Male. Differs from the female in the femora being black at I the four anterior ones for about one-third of their length ; the hind altogether black or brown, except at the tij). The majority of tlic s mens before me are of medium size (about 8 to 10"'"'). but some In ones also occur. The shape of the yellow bands does not vary as iiiiii in the female ; they are always attenuate6r), E look very nuu^h alike. The average size of ^. ribcsii ile is of a pale color, and almost impen abeeec ble ; hence the face looks smoother. ^nt^n (3) The antenna; are less dark, more reddish in iV. ribesii. ^^^^ (4) The scutellum is of a slightly purer yellow. rcnifi (5) The four anterior tibiae are less brown, more reddish, espec^'^ffP* on the first joint. "*^* (G) The contact of the abdominal yellow spots and bands witlP*®**!** lateral margins is slightly broader in /8. ribesii; hence the yellow^"*^**' longation or neck of the spots on the second segment is broader, consequently, seems to be shorter. (7) The stigma of the wings is much paler, yellow rather than br (8) The metallic green thorax is somewhat more shining, loss than in 8. torvus ; in many specimens, however, this difference is sca:^ perceptible." — Osten Sacken, 1. c. QdUa a>I, pro inches lenti 1 ften in ttenoa f S \^ U MUSEUM. SYNOPSIS OF NORTH AMERICAN SYRPlIIUiE. 79 Serences, as giv ]n coinpnrisoii of o large number of apeciniens from the Ea«>t there femora, which |a Mttle additional worthy of note, except that rarely the tubercle of the |)ecimen8 the liftMjels distinctly brown. From WushinKton Territory and California I have eight females that do not «litler in anything that I can see from pes are very vn the Eastern specimens. The bh-ck of tlie front extends down nearly to nch less variat; the antenna-, the femora are wholly yellow, and the alMbmiinal cross- », stages 0(!cuv, bands reach quite to the latcrid margins of the abdomen, though nar- 1 length, hiivf Towly so as in our Eastern forms. From S. opinator, which is very te straight, no' close, tl'c latter character, and the lower part of the front above the an- inargin; thoirltenntB not being yellow, are the chief difterences. It is very possible V such spcciii that these females may Ix'long with the males describeth male and female, X hind margin, which undoubtedly belong to .S'. rihcuii. A single small male speci- iittenuated on men from Northern California has the cheeks and a broad facial stripe •ge specimens I black J the yellow on the sides is also obscure. It may indicate a dis- •jnct species, eing black at '• 5y,p||i,g torvus. igtli ; the hind gca-m inpimia Zetterstedt (iioii Mfigcn), Dipt. Lapp., 591*; id., Dipt. S. and., ii, lajority of tlu's; f 723; iuid., viii, 3i:$;», ac. '..$!/rj>liii8 io,iiiniiis Wallii'r, IJst, <'te., iii, 582; ScliiiH-r, Vi'i'h. Zool. Bot. Oj'h., vii, :{IT; I-'iiuiia Aiislr., i, :i04 ; StacfjiT, Bon.sdorf, Malm, etc. ,0>irpluis linriis Csteii Saskcii, I'r(»c, Host. Soc. N. II., xviii, 139 (Ir*"."!). HaXntat. — Atlantic States, Washington Territory!, Greenland (Stae- "'), but some b: i not vary as nuir ends and bicn: rether jihibron II, av ' other respects 'er), Europe. Siberia (auct.). ii '^ilittlesni ^» 8. Length, 10 to iL'.o""". "Female. Face and cheeks yellow, with a ' 'liViblc foi ■©ry *^iy'''t bluish retlection ; a faint grayish si)ot on the cheeks, under he eyes; oral border; in the middle of the notch, usually slightly brown. ii ««icnr,r^ntand vertex greenish black ; the former, on both sides along the pre; tuereisuop . "^ ' ' ^ r ' yes, with a broad border of yellowish pollen, almost meeting the similar ,..• ^1,1 order of the opposite side. Eyes pubescent (in many specimens the Li 1 + imnen''*^*®'*®"^^ is. very much rubbed off and very difficult to perceive). intense inserted on brownish-yellow ground; the dark color of the .. .. rent, begins immediately above their root, forming a blaokishbrown ' roh with a projecting angle in th3 middle. Antennre dark brown ; third 1 V I esnec'**^??*' joint more or less reddish below, sometimes altogether dark ' towa. Thorax greenish, with but little luster; in well-preserved , , mpedl^ens a faint tinge of a geminate, grayish, middle stripe is percep- ^^ til vellov'^^*"^®"^'^'^' scutellum dull yellowish, with a slight bluish reflection '^^ . . ,.„„.i.., nd Wack pile. Yellow spots on the second abdominal segment ellipti- a>l, prolonged usually as a narrow neck, which reaches forward and i.1 „ K,)nol||n the margin ; the yellow cross bands on the third and fourth seg- w rather than l)r~;w: xi u- i- i -.i i ., "*"~*****ave a very gently biconvex hind margin, with a very shallow, distinct, sinus in its middle ; on each side the cross-bands are ted and curved forward, so as to reach the anterior margin of »re shining, les'^ difference is Rca:' hi «;' m til III II don I C( 80 BULLKTIV :il, rMTKD STATKH NATIONAL MUSEUM. the fu';;inent ; tlio blaiik iiittTvnl 'x'twiK'n the 8tri|M's is twice as ! as tlic .stri|><'s. Koiirtli and liftli f.c^fnu'nts with yt'llow posterior iiiai, th«^ linii usually witii two vcilow spots ou «'a<'h side, at tiu^ base, i and basal tliir bind pair the blacli rciicln A^m t yond tlic niichUe of tht* b'niora ; iiiud til)ia^ often with a biownish O^O-** — four anterior tarsi brown, the root of tiu' lirst joint often re«hlisli; Ban tarsi darlv brown. IJoot of the win;;s, as far as the humeral cross * 8p«c slifihtly brownish, or yellowish; costal cell almost hyaline; sti^'miihr '^^o "Male. Similar to the female, but abdomimd (iross-bands liiu'P®*'* ^ the bi(!onvexity on their hino lisoii, also in the White Mountains. Other specimens were from .\®^//>7>/(M8 Lesiteitrii Mat'qiiai't, Dii)t. Exot., ii,'J,92 (ft.'iiialf) ; Ostcii Sac tJd.Nt. Soe.Nat. Ili.st., xviii, 141!. I'-piHlrnphc iviiJutKjciia Walker, Dipt. Sauinl('r8.,24'^; tab. vi, 111^.5 (male) OftHttlO Hahi fate's (i\y England, Washii.gton Territory ! 't^ segi " 5 , ? . Length, 12 to lo""". 'Larger than S. torvus and with aL"**" ^^ narrower abdomen ; in the female the abdomen is a little broadir**" **■" less broad than in the allied species. The yellow face has a browi Fenuih breviated stripe in the middle (sometimes wanting); the autcmi- ** * uniformly black. Eyes bare. The yellow spots and cross-bands 1®^**" abdomen are straight, and reach the sides of the abdomen with^ "^^ full width ; the yellow has a bluish reflection (seldom in**^ hiihn)VVliisl,:etO.''-<)slciiSack.Mi. 1. r. , .. , iltcn ivdtlisli- Baron Osii'n Sii.kcn ciaild see iiu ^(h\t\rv.Vii\\i\,{ Aiisti., i, :!1 1 ^iii pail). Syriiln,.' (ihbni-'itilitH Osttii SarUcii, I'hm'. |5(isI. Sue. Nal. Iliftt., xviii, 144. Eabitut. — Conneeticair, Mas.sa. hu.setts I, Kuropc. "*»'• I-engtli, about S""". Male. Face yellow ; cheeks Ida* k, which lales and tliiitiiOlo' 'DoalcsceM witii the brown oi-al bordeis, and i.s connected under lulv 1 more or less reddish on the under side, soinetiines altogether MIS were from .^^^'^^'h ' front yellow; no brown spot above the antenna-; vertex ^ .;.>o ill r\,i,lacki8h bronze color. Eves bare. Tlioiaci<' doisiiin rather bright inTaiiis III v^iiiii, rassy-green. Yellow sjKits on .second ;'l)doMiiiial segment rather '■ 's collected i^'*ff®» ^''''''l'"''^ triangular, touching tlu' niaigin with the apex only; • • 1 .„' , .a- V ,ie interval between them moderatelv broad, eiiiial to about one-third iviuuais oi »>. I • ' L. , i,^,.^,*. t]^. y,P 0110-foiirtli of the breadth of the spot; yellow bands on segments ti ., ,J .wiait ire© ^nd four rntiier bi-oad. much broader than the black band between oriliv 01 cUKiii lem ; th«i jiosterior margin in both is sinuate in the middle, more. arkedly in the band of the third than of the following segments; the inds do not reach the abdominal margin, and are cut off obliquely on .); !, (Ml '"^ " ,e gidtei^ ; the distance of their anterior corner from the magin is very • li.r .^(iiiali) [>ftH,however ; fourth .segment with a nariow yellow border jtosteriorly; th segment yellow with a small transveise black sjtot in the mithlle, • nd with a'^*^ *^ base. Legs yellow, but base of all the femora black ; on the v'ttlo broaiU'i^^ '*''**^'^'^ ^^'*^ black occupies ono-tiiird or one-half the femur. 1 „o. r. lArnui^^naftlc. Resembles the male, but with the following dillerences : lower ace has fi uu)»l j» ' '^ . tl p anteinr'''^ ■ ' *'"""^ above the antenna?, yellow; upper part and vertex 1 '• ■ • - bands 1 1*""'*'^ green ; oral border less infuscated, the infu.scation being usually^ abdomen witlr a ji|3tinotin the middle of the excision only; the yellow spots on the V fin<.f\. "<*nd-*lbdoininal segment are larger, tlie interval between them imr- 1 • „^f,.i,r'''®i*.®ften linear, sometimes obsolete; the bands on the third and angularnotcui .»t ' n the female; t> n, and are mai: ^ments are comparatively narrower than in the male; and but lader than the interval between iiem; their hind margins are . I ^ji^.atlyf|Boncf.ve-sinuato in the middle, and convex-sinuate each side; 11 1 '„,.'.! ,11.*^ hiiDl I • I' I > i 'l: i' *'■ V, '(I'; r i::l :• Ki 1/ <. I': {• 82 BULLETIN :n, l/NITED HTATKS NATIONAL MUSEUM. at the cxtrnijo base only); tlir liiiid r«'moraiir«( altoK»'tlu'r yellow, p^n.^, ditluriii^^ widely IVoin ilios(^ ortlic tiiaU'. the e.> Tlinu^ male and six tciiialf .sptcitiu'iis, nil IVoiii MassacliUHettM. ring it A pair (S ,9 ) <>!' Kiiidpfan s])rciiii('ns ohtaiix'd Ironi Dr. Schiin; tiUm exactly niiiiilar to tim Aiiu'rican spcciiin'iis; tliey also show nil ji^j sexual tlint'n'iiccs, as explained above. Zett('rstedt'sdeseri|)ti»»n ;i; eaoh a very well with niy feniah' speciinens. In my repoit on the Dijiii anddii C()lorai for 1S7."», p. r>(!4), 1 nu'iitioned !<. corolla' as oeiairrinj,' there. I \v,h tbetbi taken in this determination ; the specimen is more like S, nbhnr leaoenl althoM;ili I would not without further proof identify it ev«'n witi coale8< speeies.'' — Osteii SackeuJ.e. The fo Four male sjieeimens from Connecticut and Massachusetts nsaalh throughout with the above full description; the se(;ond alMlomiii:il the ba.> in one does, however, distitu'tly attain the lateral mai';;in of the sc. Htthi in front. I have a male and a female si)ecimen of N. corolUv. ircVjrgfDJ from ^Ir. V. 1\I. v. d. Wiilp, tlu' male (»f which does not showanvi oommo enco that I can see t'rom my specinu'iis of S. ahhrcriafun. and ei^ Syrpbus Amcricanus. j L SjjrphuH .lHiericn»iM« VVifdiMiiHini, Aiinm. Z\v. Iiih., ii, ViO,'i'i; Oaten Stukti, ' HoHt. ScM-. Niit. Ili.st., xviii, I'l.-.. •'*•* •nt( JTahitaf.—^L'W England, Montana!, British Possessions, New ^®**'*"* Delaware, Virj^inia, Michijjtan, Texas. n£(Or B,9. Length, 9 to lO""". " Fonuile. Fac«' yellow, often '"■" '^^V'^" with n hroivn stripe in the nnddle, which bej^ins at the oral mar;:!' P**""'*' does not reaith the antenna'; the latter brown, reddish on the iiml ^,/f" of the third joint. Cheeks blackish; hut seiuirntnl f'roin ^//f ;;/'(•/ ^*, IfiflM All I narrow yellow border, which, on the underside of the mouth con ' , cuts off the connection between the black color on Iioth sides. ' . fl' brownish bronze (iolor, jiowdered with yellow on each side; (Ik ' l)art of the front is more or less yellow, but immediati'ly abovi antenna there is a brownish sj)ot, which soiiu'times coalesces wi bronze color of the upper front ; vertex bronze color. Eyes biui first abdominal cross-band is not interrupted, but coarctate in tL die; its ends do not touch the niargiu of the abdonuMi, hut are scp from it by a narrow black border; (sonu^times a brownish mark .. nordiui md ae^^i he blac hesesr •ral giai aotwitl •e: heeki, ana|gr( rati(ei middle of this band gives it the appearance of being subinten The second cross-band is nearly as broad as the black cross ha tween it and the next yellow band; it is usually i)erfectly stnii; some specimens the hiud margin is gently sinuate) ; its endsi touch the lateral margin of the abdomen ; they are cut obliquely, ing a sharp angle anteriorly, and a rouiuled one posteriorly ; tlioi'^IJltt* almost touches the margin of the abdomen. The third band is< %rj> to the second, oidy its hind margin is more percei)tibly arcuatiMl ^Oi^ta posterior margin of the fourth segment has, as usual, a narrow "(^| 9 border; the tifth likewise, and two yellow spots at the base 1 i**e©l», a MUSEUM. SYNOPSIS OF NORTH AMERICAN SYRPIIID.K. m;j {I'tlier yellow, p^^toia .vcliow; tin* four antriior oiu-h in soiiit' spooiiiieiis hrowiii.sli at the extrciiic haisu only ; tlu; hind pair w itii a iiioiu or \vnn (liHtiiirt brown ssachuHetts. ring on tlu' ilLstal half; four antt'rior ti()i!i- anil tarsi .yellow ; the liind ni Dr. Schiiii: tIbUBNonictiiiM's with a Im-o " ninh riii^;, tlit'liitHJ tarsi hiownish. also show ill Male. I'ront yellow, with a mo c or less distinctt hiown spot a!>ov« uleseriptioii ii; each antenna ; erosshanils on the alxloinen Itroailer than in the female, on the Diiib anddistinetly Itroader than the lilack inteivnl het wi-en them; posteriorly, !., hy !"\ V. ll;i they iire often nearly straij'lit, sometimes distinctly jircnate. »'s[ie(!ially J there. I wi- the third hand. The yrllow spots on the second si'jjment are not eoa- likp S. nhhrir leioeDt, hnt sepa'ated hy n luiirow black interval (in some specimens snb- ry it even witl coalesceni) ; the ;.'''li seynienl is yellow, with a black spot in the middle. The foni- antericr lemora are bhuik at the base; tli«' hind femora are iissai^hnsetts asoally bhick. witli a yellow tij); s(»nietimes there is a traceof yelh)W at )iid abdomiiia! the base; hind tibiic nsnally with a brown lin;; in the middle. r^iin of the sc: Habitot. — Ibifisli j'osscssions, New Kiifiland, N«'W Yoik, Delaware, N. cor<>//a'. Ill Virginia. In l)«'troit. Mich., in Anynst, I lonnd this to be the most not showanvi oommon species. It seems also to lu; common iii Texas. Sixteen males UltHH. and eight lemales. 8, amerivanun, ? , dill'ers from S. nhhrfrhttiis, 9 , besides Iwiufi lar}>er, - in the presence of a brown stripe in the fac«', and of brown spots above ' the antenme; in the spots ot the second segment beinj;' altojjether <'oii- Jesoent (instead of narrowly intermitted); in the cross-bands not toiidi- ing (or hardly tonchinj,') the abdominal nniryin, while; in S. ahhreriafnn , the contact is broad and distinct ; in tlu; cross-bands beinf-' (in nmsr low, often brov .... • , . • i ' , jpeoinaens) more straiL'ht, less sinuate i)osteiiorlv. the oral mar;.'!' *„ _ / , ,7,,. . ... sessions, New lisli on tin' mil 1 from the won 8. ainctintnus, S , tlillers from *S. uhhrcritttuN, i , besides bcinj;' lar;;er, jy the brown stripe on the faiu", the more strai;;lit second cross band ic numtli coll 1 n both sides. iU'li side; tin i'diately abnv ■s coalesces w ■ )r. I'^yes biin loarctate in tl; leas ainuate posteriorly) and by the coloring of the liinw'6'«HH.v which have the hind fenioia iiltogetlier jlaokiBh, the yellow space at tlu' tip is narrower than tlie yellow s[)ac6 n ordinary specimens of S. abbrev'uttm, $ . The yellow spots on the see- mdaeguJent (in all my ivcn, densely hestt with vtlln l>ilf; the broad j^cnimate, firayisli stripe in the iniddli* is snboljsoic Sciitellum yellowisli metallic-opalescent, b»'sel with black i)ile. Alii men black, opa(iue on the anterior, siiboiiacpie on the posterior part the segments; the two yellow spots t)n the second sej;itieiit are prol()ii;'e anteriorly, so as to rea<'h the lateral margin of the seijinent at its a terior corner ; the two other cross-bands aie rather narrow (not inn bioader than one-fourth of the breadth of the se}j;nient), atteiiuateil the middle (even subinterrupted in one of the specimens); their ends a: ►separated from the lateral margin by a narrow black interval; po.v;: rior margin of the fourth segment with a narrow reddish border; that the lifth still narrower. Legs reddish yellow; proximal half (or iii';ii so) of the four anterior femora black; hind femora black, exceiit tip; hind tarsi infuscated. Stigma brownish; both costal cells d tiiictly tinged witli browi. Two specimens. I'emale. I have two specimens, which I n'fer t(» this species, on count of their entirely yellow face and the course of the cross-baii- wliich is nearly the same as iu the males; but the femora are entii> reddish yellow, coxre and trochanters remaining black. Vertex .yin isli black ; front metallic green, densely yellowish pollinose, its lo l)art reddish yellow, except two brownish marks above the root ol' ; anteanaj." — Osten Sacken, 1. c. I have examined nearly fifty s])ecimens of this si)ecies, male ami male, from California, Oregon, and Washington Territory, which ;i;:! closely with the above suflicieiitly full description. The yellow cIht and face, bare eyes, and the second and third abdominal cross-bai not reaching the lateral margin will distinguish the sj)ecies. Byrphus geniculatus. (Plato IV, Wis,. 3.) Syrphus geniculafiisMiicqwiirt, Dipt. Exot. , ii, '2, 101, '^4 : tab., xvii, fig. 5: tcuSai'kon, Proc. Bost. Soc. Nat. Hist., IHT"), ir>tl. Habitat. — Newfoundland (Macq.), White jMountains! (J. Length, 7.5 to 8™", Eyes bare. Antenmxi unusually small lo: Syrphus, short, third joint nearly round ; black throughout. Facep: duced downward and forward, the tubercle prominent; dull yelloff on the sides and below the antennai, b'lt in large part obscured b; greenish-black reflection, the yellowish part clothed with ,■ hitish iioi! cheeks and lower part of the face greenish-black, extending up fiuH in the middle, shining on the tubercle. Frontal triangle grei'iii' black, thickly (tovered with yellowish dust, and with long black \>. vertex black. Thorax black, or dark brown with a faint, giri'ii tinge, and with lather abandaiit black pile. IMeurai whitish dii> aiid with light colored pile; scutellum obscurely yellowish, with b!i dbli b iiv ll SKUM. SYNOPSIS OF NORTH AMEKICAX SVRPIIID/E. 85 L' ; front iilmv. black, .vi'lhii (ovc! tlii^ root, ft with vclli iS .sul>t)l)S()lf: k ]»il«'. Aliii )steii()r l)iut t are j)r()l()ii;'f lu'nt at its a row (not mil , attenuated: ; their ends ii: nterval ; \w>k border; that half (or nc';ii ack, ex(jt'i)t ostal cells d i species, oil he cross-1)iiii'; ira are eutiu Vertex .u'lVf inose, its lo' the root of ; !S, male and ■y, which a:: yellow cIhi iial cross-bii: ies. b., xvii.fig. J: lally small k out. Fatei': (lull yellow: t obscured b) hitish iHiil' (ling- up fiut angle grceiii' ong bUick Y- faint, griH'ii whitish »lii^ vish, with b!. lie. Halteres yellow : tegu'..e with a brownish border. Abdomen longate oval, black, oi)aque, only .; little shining; second segment ^ith a very small reddish-yellow spot on the sides before the middle; Aird and fourth segments with a narrow cross-band near the front, Sroadly and rectangularly interrupted, touching the lateral margin; iarrow hind margins of the fourth and fifth segments and anterior an- pes of the fifth yellow. Legs dark brown; the tips of the femora and iase of the tibia'only narrowly and obscurely yellowish; the hind legs lilid all the tarsi black, the hind metatarsi a little thickened. Wings llbscjurely hyaline, the stigma only a little darker, all the veins blackish. : " Diders from S. iiniheUatartnn in being a little smaller (about 1. ')""") ; liie face in protile is much more i»roJecting, tlie facial tubercle a metal- lic blackisiigreen, which color extends on botii sides along the oral Hiorder; in the other species the facial tubercle bears a distinct stripe; JS^ the female the sides of the face, jiowdered with yelhnv jyollen, hav(^ # brownish-yellow ground color; tlH> antenna' are inserted on black "roinid; the front in the female is brownish green, much broader than ,S. innhellfifdnnu ; the i)ollen on the si«les is much less thick; it fol- Ijpws on l;oth sides the orbit of the eye tluiK nmhcUalnrum Sc'liiucr, ]'"iiiina Austr., i, p. 307. ''. Siirphus (jnttatux Walker, List, etc., iii, oSi). Siirphim Ct-qitadrtihiH Walker, LJHt, etc., r>e6. .■>///7>/(MN iiiiilicnatnriim Osteii .Sacken, Proc. Host. Soc. Xat. Hist., 187."), l.")l. ihitat. — White INIountains, New Hampshire, Arizona I f,9. Length, 8 to 9""". Antennie blackish l)rown. Thorax shining llic green; pleura; thickly whitish pollinose and with whitish i>ile. omen subopaque black, with three interrupted cro.ss-bantls, about hird of the width of the segments, situated on their anterior ])arts. ^emale. — Eyes glabrous. Face yellow, with a whitish pollen almost icealingthe ground color; in the middle a brown stripe, cr(»ssing the Mid prominence, but abrui)tlystoi»ping before the base of the antt'iiUie; stripe does not run down on both sides along the oral margin (it Bs so for a short distance in a very few specimens); oral margin yel- as well as tin; (dieeks; front and vertex bluish green (not brownish ^eiO ; the yellowish-gray i)oIlen on the front forms a well-marked arch, -interrupted in the middle, leaving iiare on one side the veitcx, I I ) i 86 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. i; V I t fi on the otluT, a well «U'flne(l triangle above the antenna.'; the sk of this arch run down along tho eyes and coalesce with the facial j)oll, antenna? inserted on brownish-yellow ground; thorax bluish grtr scutelliun dull yellow, brown at the exti'enie ends on eiich side; it> doni shows any trace of a bluish metallic reflection ; the four front li, are .'eddish yellow, femora black at base ; tibia? with a trace of a bio\> ish ring; tarsi brownish. The abdominal cross-bands usually reach t lateral margins of the segments, but quite often they stop a little d tance before, leaving a narrow black border between ; their color isn ish or |)ure yelic^w, with a more or less (li«^M«<.t whitish i)ollen, wbi often gives them a whitish ai)pearance. Mnic. — The face often, not always, has a more distinct metallic biii> reflection ; the oral border is more often bordered with brown heretL in the female; the ground color of the abdomen i . more opaque. I compared twenty-flve males and sixty-five females, mostly tal; by Mr. Morrison in the White Mountains, New Uampshire." — Om. Sacken, 1. c. Several specimens from the White Mountains agree very well w: the foregoing description of Baron Osten Sacken. A single female fri Arizona does not show any appreciable diftereuce. Syrphus zanthostomus, u. sp. Habitat. — Pennsylvania! S. Length, 11 to 12'""'. Face and cheeks wholly yellow, anteii: reddish yellow, the third joint somewhat brownish above, but lit longer than wide, the arista black. Frontal triangle with a small bla spot in the middle, gray pollinose along the eyes, black pilose in t middle. Dorsum of thorax shining metallic green, with light colnr^ pile. Scutellum wholly yellow. Abdomen black, but little shining.i three principal bands very broad, attaining the lateral margins in tli' full width ; flrst band interrupted, the spots narrowly sei)arated, w their inner ends rounded; second and third bands with a narrow ' deep emargination in the middle behind ; fifth and sixth segments v: a yellow^ hind margin. The black forms narrower bands than the ydln and does not quite reach the margin. Legs yellow, the tii) of hind til and their tarsi brownish. Wings hyaline, tlie stigma yellowish. 9. Front metallic green, yellow below, on the lower half witli} lowisU pollen. Yellow spots of t':;> second abdominal segment lai^' more nearly sfjuare, and only narrowly sej)arated. Two si)ecimens, Pennsylvania (Mr. Keen). Syrphus genualis, i;. sjr. JIahiltil. — New ilam])shirc! $. Jicngtii, 7..')" Front sb.ining black, with an interrupte.! h of whitisli policii across the middle. Antcnnte yellowish red, tlic tli joint brownish above. Face yellow, a median stiipe, the oral iiiai. and the cheeks, deep shining black. Dorsum of thorax sliining iiu' ItC^prct m^hh iailrru] routed i hvoA nii femora soticost Onti s flyiphus ^ahit ■%. L bli^k. 1 1 Ittt^scci: Head taberclt' briellN 1 estlndii Invtt stet pabes(H' opaque, middle 1 sabincri tibin loi Si|>hus J^ahitt thorace flavidis, sdgmoito nigris, j\ cli» hi/al Antei en dess( mddiantj d'un cot av0e la 1 h viUosi blancs. 1 jaupatrc ,1 ! USEUM. SYNOPSIS OF NORTH AMERICAN SYRPHIDiE. 87 'HDSL' ; tin' siij. be facial \n)\l[ X bluish {iiei; ■acli side ; it > 0 lour front li. race of a brow isnally reacli i; stop a littliMi heir color is re di i)olleii, will t metallic blui' brown here tk e opaque. s, mostly tat ipshire." — O.-i' e very well wi ngle female fn yellow, anteui above, l)ut lit ith a small 1)1* ick pilose iu t; ith lij,'ht coliir- ittleshining.i margins in tlit sejiarated, w; ith a narrow' h segments w; than the yello' rip of hind til' ellowish. er halt witliy segment lai't't iterrui)te.l h: sh red, the tli the oral iiiai. X sliining iiu'! llti^^reen black, nearly bare. Scutellum wholly light yellow. Abdo- nllp shining black with narrow yellow bands ; the first rather narrowly in^rrupted ; the second and third straight, entire, not appreciably nar- rOtjied at the margin; lifth and sixth segments with narrow yellow hmi. margins. Legs yellow ; the hind i>air, ex(!ept the base and tip of ftiiora and .le Itase ol' the tibia', brown or blackish. Wings hy.'iliue, aii|icostal cei' ligiit yellow. ^i\c si)ecimen, near the base of Mount Washington, August. Byiphiis simplex. Sjirphiix simplex Loow, Wieu. Eiit. Moiiatsulir., v, 40; Cfulur, vi. ■V.i. Muhitdt. — Cuba (Lw.), San Domingo! '■f. Length 8..')""". Steel blue, lighr yellow pilose, antenna} and legs Uy^U. l)ase of front and middle tibise and the knees of the hind legs lati*^c«'iit. r>asal half of the wings ])ure hy;iline, tij) blackish cinereous. J|[ead bjackisli-steel blue, shining. Face white poUinose, the small tHWrcle l)are. Eyes bare. Antenna- black, third Joint ovate. Front brfelly black |)ilose on each side, with a nnirginal white pollinose stripe «l||nding from the middle of the front to the face. Thorax and scutel- Ittlif steel bine, shining, clothed with whitish i)ile. Abdomen whitish pubescent, steel blue, each segment on the ])osterior part obscure, opaque. Venter steel blue, shining. TiCgs black; base ol" front and middle tibi;c and the knees of the hind i)air lutescent, hind metatarsi fncrassate. Tegular whitish. Halteres sordid lutescent. Wings ine, the apical half blackish cinereous, stigma blackish fuscous, I longitudinal vein nearly straight. 'Wiiv specimen, San Domingo (G. F. Frazar). fljmhiis quinquelimbatus. 'W Sjirpliiin qiiinquvUinhuinK Hifjot, Ann. Soc. Ent. I'r,, l';84, Ul. Mol'ifot. — California (Digot). ||, Long. 0 mill. Antonii.s iiiffris, had, hiferne, fulvo notaiis; fronte etMcic pallidc Jfavin, paivvfuHCo tonicntosis, rittin media nis nitjris pictis, •'^'TBct' obscure nitente, scutcllo tcstaeeo, Jlai'ido iomentosls; calyptris et rihus palidi tcstaccin; ahdomine uiiiro, I'ittin irantiVfrsh quinque dis, prima intcrruptu, qitartd et qiiiuta anf/ustis, ciincUs ad apicem 8i0tte)itorum locatis ; pcdibas paUidv J'ulviH, imd ha.si, tar.sis apice latd, niffliH.s,J'cmoribiis posdci.s late fnsco ainnilati.s, tihitu posticiti, iarsis, funds; aUtJuialiiii.s, macula .stinmaticali louf/d, obftcurc Icstaced. Aiiteniies et chete noiratres, W' segment assez <;ouit, ovalaire et teint en dessous, a la base, d'un pen tie fauve ; front jaunatre avec une bande mMiane noire elargie A ses deux extremites, convert, ainsi que la face, d'un court duvet clairseme noiratre, cette derniere d'un Jaunatre clair avec la bande mOdiane et les Jones brunes ; thorax d'un noir pen luisant ^ vlllosite Jiiuiiatre ainsi (pie Tecusson lequel est lestace ; cuillerons blW^cs. boi'des de Jaunatre, bahuicit rs testaces ; alxlonien n(tir, \ilIosit6 jailjpfitre assez dense, sise de cJKUpie (iote de la l)ase, 1"' segment avec i\ 88 HULLKTIN 31, UNITED STATES NATIONAL MUSEUM. i' I!! il I 'l; -i!l ",'1 I.I Li I i • (leiix inacuU's inediiines liinuU;c*s, allongecs, auiiiu;io>s latOralenu'iit atteignant les cotes, 3^" et 4^ avec une laryo baiide basilairc. atom, lateralement et atteignant aussi les c6t6s, ce tleniier aiiisi (|iu' ], bor(16s (I'm. janne obscur, tons deux d'uii jamie iiale; i)ie(ls fauw hauches, base extreme des cuisses et tarses lai'j;eiiieiit iioirs, pie post6rieur8 avec iin large auueau brunatre difl'iis, sur les eiiissos.; tibias presqiie en eiitier et les tarses d'un brun WnwO, ; ailes hyalint macule stigmatique fdlong<5e, d'liii gris jaiuiatre. Californie. — 1 specim. Bigot, 1. c. SyrphiiB maculifrons. S!ir])hu8 mucuUJronii Bigot, Aiiu. Soc. Eiit. Fr., 18(^4, 89. Habitat. — Oregon (Bigot). Lonr/. 10 mill. f uliete rougcii!: rougeatre, \u irs; thorax d' jaunutre obsr 3 avec des ivi!' ilaiiciors Jaiiif r** segments av ayaiit les an; igiiant les co; e; i)ie(ls I'auv t, tibias et rai- se (lesdits tibi. n testaee obse e baiide niodia > $ .—Bioot. iXlCO. xi, fig. 13.— Mes vi, 46.— Cuba. st Indies. :iuS. — Mexico, SYNOPSIS OF NORTH AMERICAN SYRPIIID.E. 80 Ulrrphusnigripes I..<»t'w, Ceiitur., vi, 14.— Cuba, •rphus praeustus L<"'w, Ceiitiir., vi, 4."). — Cnlta. phus quadrifaBciatuB Bigot, in R.df la Sagra, etc., y04 ; pi. 20, fig. 5.— Cuba. anus radiatuB I>igi>t, in R. do Iti Sagra, etc., 804. — Cuba. ahus Btegnua Say, .J. Aiad. Phil., vi, lO:?, 1 ; Conipl. Wr., ii, 358.— Mexico. , DIDEA. Didea Macquart, HiHt. Nat. Dipt., i, .W8, 1834. Fnica Mei^ren, Syst. Hi'sclir., vii, 140, 1838. liSirge, iiietallic black, not bare species, with flattened yellow or gjpeenish-yellow banded abdomen. Head hemispherical, broader than tbe thorax. Anteniiic short, third Joint oval, with a basal, bare arista. iW|K;e gently concave below the anteiinre to the obtuse tubercle, thence fii^eding ; chiefly yellow. Eyes contiguous in the male, bare or pilose. iiorax without yellow on the dorsum, though it may bepollinose near sides. Scutellum yellow translucent. Abdomen broadly oval and ttened, broader and much longer than the thorax. All the legsslen- Wings ('omi)aratively sliort and broad ; third vein with a consid- Ible sinuosity bending info the flrst posterior cell; otherwise as in l^|rphus. Type of genus, D.faseiaia Macquart, Europe. /iThis genus cainiot be distinctly sepnrated from Syrphus; as its chief o3|iract.eristic, the (curvature of the third vein, is also found in one of ^^ varieties of Syrplim arcioifits. It is, however, useful, and may be riUkiincd. TABLE OF SPECIES. - '4' Lif-Third joint of antcniue ()l)tu.s(.'ly pointed at tip; eyes bare; abdominal cross- bandu broader toward, but not quire reacliiufr, the lateral margin of tbe abdomen fuscipes i Third joint of antenuic olitusely rounded at the tip 2 f-Eye8 bare ; cross-bantlH broadly interrupted. (See Syrphus arcuatiis var. lapponi- CUH. ) |EyeN I hinly jtilose ; the abdominal cross-bandH reacli narrowly quite to the lateral niargiu laxa XMdea fasciata fuscipes. lUdcafiisdpes Loew, Centnr., iv, 82; Osten Sackeu, Cat. Dipt., 245, note 212. Sahitat. — Connecticut, Pennsylvania! 5 , $ . Length, 11""". Eyes bare. Antenna^, black, the third joint at •tiMS base sometimes reddish, elongate oval, obtusely pointed at the tip; arista reddish. Face yellow, with a small, elongate, brownish spot on tlUB tubercle. Front yellow, with two brownish spots above the anten- nfOi or, in the female, with an inverted V-shaped brown stripe connected 'witti the black of the upper i)art of the front. Orbits thickly yellow- ish: poll inose, and with a fringe of yellowishwliitisli ]»il('. Thorax shin- ing greenish black, on the nl('^■o, i)te)'o, and stcnioidcuiic yellov, thickly covered with similar colored jtollcn and jjilc. 8(nitellum light yellow, translucent. Abdonji'ii l)hick, with four yellow cro.ss-bands, the first i'> ' ,t. Il1 ' I, l> . II ' I ' , I ' li!: 'I ! M I IMK ) » |i: \ 90 BULLETIN 31, UNITED SVATES NATIONAL MUSEUM. consisting ot' two large ovate spots, narrowly sei)aratcd and reacbin; the lateral margins ; second and third cross-bands broad, separated tVo: the lateral margins by a black narrow border; tlie> are mncli narrower the middle of the segments, the lrt)nt maigin straight, touehiug tlio.u terior edge of the segments; fourth band similar, but miu;h siuallc posterior maigin of the segments shining, dilated in the mithlle. Lc. brown, the posterior libiu' and all the tarsi blaeki.sh; souietinies tl, legs are luteous, the base of ieuKua, distal portion of tibiie, and the tiir^ brown. Wings grayish hyaline, the base before the humeral cross vi and the st.gma brown, the r«'mainder ol" the subcostal cell and tl costal cell may be biownish : tliird vein rather deejdy curved near tl middle of the first ]»osteiior cell. Three specimens, Connecticut, Pennsylvania (S. Auxer, E. Keen). This species, as it has been called, shows but slight differences fro: D.fasciafa of Eurojie. The i)ropriety of se]>arating them sjiecitieal; is, to say the least, very doubtful. The only real diiieience appears; be that the legs are a Uttle lighter of the tibisB reddish. Didea laxa. (Plate IV, figs. 4, 4a.) Didea laxa Osteii Sackon, Bull. Buff. Soc. Nat. Sci., 111,50; Cat. Dipt., 21; note 212. Habitat. — New Hampshire, California, Washington Territory, 0: egf n !, Michigan, Maine (O. iS.). 5,9. Length, 10 to 1.3""". Eyes pilose, more distinctly so in tl male. Antennae black, third joint oval, obtusely rounded on the eiic arista black. Face yellow, with a broad shining black or brown stiiit not rea(!hing the antennae. Cheeks brown. Frontal triangle bliiti yellowish dusted along the eyes, pile black; front in female sliiiiiii. black ; on the sides the yellowish-gray dust extends up along the eye and expands in the middle, nearly meeting. Thorax blackish metall green, shining. Scutellum dull brownish yellow, with a slight greeiik or bluish metallic luster. Pleurae with a whitish vertical stripe. Al domen black or bluish black, with greenish yellow cross-bands; oritl second segment two large oval spots, reiiching (rarely narrowly scp. rated a'om) the lateral margins ; third and fourth segments each wi;. a cross band, extending narrowly quite to the lateral margins, bicoiivK behind, and with a sharp jiosterior notch in the middle, in some s\w: mens distinctly interrupted ; fourth segment behind narrowly yellow: the middle, forming with the anterior angles of the fifth an entire cros band; fifth segment behind yellow; ])ile on the black portions blact elsewhere yellowish. Venter black, the second, third, and fourth w. uients each with a broad cross-band, narrowed in the middle. Leg.s yi lowishred; iiroximalhalf of front ai 1 middle femora black, hind feiiio: black, except at tiji; hind tibite with a brown ring in the middle, .mim irt' i» USEUM. tl and reacbini , separated IVo^ ucli iiiuTower; oucliiiigtluM; iiiucli .sniilllf; e middle. L- sometimes tl Hi, and the tiir. iieral ciuss vt; al cell and tl iirved near tl i'V, E. Keen), lillerence.s frut lem s])ecificali [ince appears! ' .specimen tb domeu and tl , with the ba> i; Cat. Dipt.,M Territory, 0: uctly so ill tl ed on the eiic )r brown stiiiif triangle bliiii female sliiiiiii. along the eye ackish metall slight greeiii>. ill stripe. Al -bands; oiitL narrowly scp. lents each wi:. rgins, bicoiivK ill some spii mwly yellow:. an entire cros; l)()rtioiis blaii ind fourtii st. die. Le^s yi Ltkjliiiid I'ciiin: e middle, son- SYNorsis 01' Noirnr amkricax SYHPiiiDiE. tl les extending over the whole tibia- ; trout and middle tarsi brownish, «icept the biise and lip; liitid tarsi on the three intermediate Joints lllackish; tiie metatarsi also sometimes blackish. Wings with a grayish tinge ; stigma brownish ; veins on basal part red ; curvature oi the third V6in more shallow than in D.fuscipcs. ' Tiiree specimens from the AVhite ]Monntains (Dr. George Dimmock, 1800) and thirty-three from Oregon and Washington Territory; also, Hffee from Calilbrnia. In some of the Western siiecimeus the front and. middle tibiai have a small brownish ring. This species corresponds to i>. i«/«e/i' of Europe. XANTIIOGRAMMA. Xnnthogrnmma Scliiiior, AVicn. Kiit. Moiiiitsclir., iv, 215, 1860. [oderately large, nearly bare, sj)ecies, black, with yellow markings oi head, thorax, and abdomen. Anteniuii shorter than the head, third ||nt ova), arista basal, bare. Face yellow, tuberculate. Eyes bare. Contiguous in the male; front long in the female, narrowed above. I^jorax with yellow lateral stripes. Scutellum yellow, its base black. Abdomen more than twice as long as, and wider than, the thorax ; ellip- tical or with the sides nearly ]»arallel, not club-shaped. Legs simple, gfender. Wings as in >^yrphiift, the third vein often gently curved into tl|e lirst jiosterior cell. Type of genus A', onidtu i\I(!igen, Europe. This geu"s cannot be sharply distinguished from ^i/rjyhus, as, except Ui acqualis and Jlavipcs, the later.il dorsal stripes are not much more CifDspicuous than in certain species of Syrphus. TABLE OF SPECIES. 3^>r-D()rsuiu of thorax bctorc tli« seiit(;Ilimi with two coiilcsr.eiit light yellow spois ; i wings with a lirowii aiitt'iior margin aequalis ,1 Dorsum of tiiorax without vcllow spots on thr hind margin ; wings not brown in ■ front a J||t-r!cura; with light v('lh)w spots flavipes rirurac without distinct liglit yellow siiots :{ 3,»(— The yellow banil on the second abdominal segment attains the lateral margin. emarginata _ V The yellow band of the second segment is sei)arated by a distinct black interval " from the lateral inargin 4 #i"— All the cross-bands of abdomen broadly interrnjited divisa All the cross-bands not broadly inti'rrupted falix SBjUithogramma felix. '., Xi m ! If 1 I 'I ^' II 2!^ 'i |;i:l: 1^ •^ J;|\ 1. Ivi M , ,■ h i 't ¥ t i :^ ! 92 HULLETIN :U, UNITED STATES NATIONAL .MUSEUM. of Syrplius Hometiines assume); vertex dark nietallic {,'roeu, emiltiii; stripe of tbe same color, whidi readies the base of the ajitenim', wIh it expands a little; between this stripe and the eyes the front is ydli, Antenna' black, sometimes faintly reddish on the under side, neai i suture of the second and third Joints; third Joint rather larae, ov blunt. Thoracic dorsum of a. rather bright metallincroachiiij; ui)on the hiiul margin of the jjiecediufj segment ; i fifth segment has a imrrow yellow posterior nmrgin. Legs yellow, lii;i legs black or brown, exce])t th<' base of the femorii, and a s])ace on ln- sides of th<' knees. Wings with a distinct brownish tinge on thcdiv half, anteriorly; stigma brownish; sometimes the whole wing hh brownish yellow tinge. "Habitat, West Point, X. Y., in September S-](), three females; i: nois; Pennsylvania. (The speciiiuMi from the latter locality is siim!!, wings more hyalitie, legs and antennie of a ])aler color). The first ;; third bands are as often interru])ted as nut; the secoiul often sli(i\v> vestige of an interru])tion in the slia])e of an iiidistinlackish line tbe middle.'' — Osten Sacken, 1. c. A single female s])ecimen from (.'onnecticut (Dr. L. T. Day) ii^in very well with the Ibregomg descrijjtion, except that the third Joint the anteinia; is black above and at the tip, and the other Joints arc it dish. The first ami third cross bands of the abdonuMi are narrowly i terrnpted, the second entire, but emarginate behind. Xanthogramma divisa. A'anthoyramma dirisa WilliMtoii, Proc. Am. Pliil. Soc, xx, 311. JIahitat. — Washington Territory, White Mountains! 9 . Length 9 to 1P"°'. Face and cheeks yellow, or red lole wing li;h ee females; i; I'ality is stiiiill. . The first ;; d olten sli(i\v> blackish liin' T. Day) ii-iv le third Joint n- joints arc iv are narrowly r m SYNOPSIS OF NOKTir AMEHICAN SYUrillD/i: 5)3 reddish-yello' itennse, and w: greenish -bliU: e, soniewhiit •; somewhat n •(1 Joint near ;. itlier ill-d('iii? l)(,t. Sentcllri. ek. Alxloiin: J jUrst segment with a small yellow spot on eaeh si.'«'w llam]»shirel * ^ . 9 . Length, 10 t(» 11""". Face wholly yellow (or rcddi.sh-yellow). ABtciiiiic reddish ; the third Joint near the ba.se and on npi)er ])art biackisli. Frontal triangle, Jnst above tin* antenna', with two blackish spots, connected by a brownish arcuated band ; elsewhere the triangle igyelldwish pollino.se. Front in female shining metallic green: on the St^es. iVom a little below the ocelli, yellow like the face, and yellow ])ol- liljtosf': ]»ile black. Thorax shitung bronze-green, with a rather broad, not conspicnous yellow stripe on each side; an ill detined yellow spot on the i)icnra'. Scntellnm translucent yellow, with black and yellow pile. Abdomen opaque black: first segment shining, yellow on the sides, near the halteres ; second segment with the extreme fi'ont angles yel- low, and two large, oval sjmts, imrrowly .se])arated, and only a little attenmited before the lateral margins, which they touch; third segmeni". narrowly yellow at the anterior angles, and near the middle with a broad yellow crossban'4;ton, near evening, .Inly 25. Tn a siiecimon from the White Mountains, examined since the al was written, I tind the si)ots of the second segnu'nt distinctly sepnir from th(» liiteral marj^in. It niijiht readily be confounded with >| mens of X.fcJix^ but the species otfeis other distinct ditlerencses. ji ema){fin(it(( the last se(;tion of the fourth vein is longer and more oIiIhi the first posterior cell broade^ ; tiie first i)air of abdominal sitots more broadly separated, and the tw(> following bands more ronmldl their posteiior angles; the black of the abdomen is less shiniii;:, dorsum of the thorax more metallic than in the two specimens m feliv known to me. Xaiitbogramma flavipes. DoroxJIaripvH Louw, Ceut\ir.,iv, 8^. Habitat. — Pennsylvania, Connecticut!, New York (O. S.) leura, a spot above the anterior eoxa^, and the sides of the iiit notum, yellow. IScutellumliglityellowalong its uuirgin.blackat tliobi Abdomen velvety black. In the male the lii"st segment shining; secc segment with a broadly interrupted yellow fascia near the front pa third segment with the broadest fascia entire, on the front pait, cm ginate behind; fourth segment similar, and also on the hind boii narrowly yellow, not reaching the sides, but forming with the aiitn angles of the fifth segment a stronglj' arcuated band, the latter > ment yellow behind; hypopygiuni blackish; third segment across' wltht\ middle with a narrow shining fascia, which in some specimens iiuiy nlate. reddish; fourth segment with a broader shining cros*sband; fifth wIk with t so. In the female the first three cross- bands are narrower than in niMdle male, of an even width, not interrupted nor emarginate, the sliiir of Ihe i ! MTSKUM. HVNOI'SIS OK NORTH AMKRICAN HYRPHIP/K. !'5 f tlu' soKiiieii: biisiil spot on (., ; the hind rcn, i blown. W on, liibelU'd": Xnotlior M|)(;(i.| |)Iiia, collcctd; llcctcd l>y iiiu I .since till' al» stinirfly scpiiin nndcd witli >| itteionci's. h Hid more olilnj loniinal spots jnoie ronnddl loss sliiniii;:, ) specinitMis oi D. S.) nr-yellow ; in idcr bliiclv st; ■nna;. First; third joint lil,i n the I'onialt'. mil', v.itli a •!! with a pioiiiii; I'ior orbits wL iro, brifjht yAV ', roacliing' oir sides of the iiit .black at tliflu t shining; socc r the front pa: front part, m the hind boii with the aiitK ul, the latter > gfnient aoross' ipeciinens nniy )aud ; fifth win rower than in nate. the sliii; ||g|(;iii' across the second, third, and fourth si'gnients arc bioader and iOnn'times (pnte reddish or yellowish in the middle; pile yellow on tho jftllow jiortions, black elsewhere. Le},'s yellow; the hind tarsi reddish or blacliish, except the last two joints. Wings hyaline; the stigma yellowish. Six specimens from Connecticut. This species is foniul nsnally in thick, shady vegetation, in damp p!a(!es. Ztnthogramnia gequalis. (I'lati^ I\', tii;. <1.) IhiriiH (ie of the third Joint reddish. I'roiit rat Iicr narrow above ; yel- low, black lit the vertex, <'oiitinned us a rather nairow bla(;k stri|)0 to tilebiisc of t lie antenna'. Thorux black, nearly bare ; near the iniddle of the dorsum with two iiiint pollinos.' strijies; on the lateral margin with auarrtuv, well-defined, bright-yellow strijie ; on the posterior margin, with a rather small transverse yellow spot, cut in two, or nearly so, by a rectangular black einargination in front. Plennc with two oval, bright yellow spots, one on the sterno-pleura' and one above the fnmt coxa"-. HtMitellum reddish, blackish at the base, along its border with a row of short, light-colored hairs. Abdomen cylindrical in front, com- pressed behind, shining black, with rathernarrow bright-yellow bands, aa follows: An arcuate band near the middle of the second segment; aitraiglit one at the base of the third segment ; one at the base and one at the jiosterior margin of the fourth segment, the i>osteri(U' one dilated in the middle ; on the posterior margin of the third segment there is a small median yellow s])ot, and on the til'th segment tliert^ is a Blonder longitudinal stripe, not quite rcuchiiig the anterior niargin. Vonter with four yellow cioss bands, the first three rather broad, and ittmated ui)oi; the ])osterior niaigin of tlie i>receding and anterior mar- g£tl of the following segments ; tlu' foiuth band is linear, and situ- ated upon the hind margin of the fourth segment. Legs yellow ; the femora broadly, in the middle (es])ecially the hind pair), the tip of tho hind tibiie, and the hind tarsi, reddish or brownish. Wings nearly hyaline, along the front border rather narrowly and e(puilly brown. '^sf . Length, 9.5'"'". Head yellow, vertical triangle and occiput black, t]|0 latter white pollinose on the margin. Frontal Innnle, antenna), and cheeks blackish pitchy. Thorax black, clothed with Intescent and whitish blackish pile ; dorsum on each side with a yellow stripe, and on the [posterior] margin with two confluent sjiots: besides these, with two, more obsolete, whitish pollinose stripes. Pleura) yellow bimac- nlate. Scutellum testaceous. Abdomen of equal width, black, shining, with three narrow yellow fascia;; the first moderately anniate, in the middle of the second segment; se(!ond and third straight, at the base of the segments, both narrowly interrupted; basal fascia of fifth seg- Of; i»ui-li;tin :ti, rxm:!) status national muskum. ■r ; r •» ■ w; tihia! yrHow, 's cif aWdonM'n and le;;s. It is a very .striking? species, anliu;U, on llllCOllS, Ii|i , oils ocliiai'cii 8. \Vni;;s V Itli, cUnuU'il \\ htJ'd to the ki spi'cit's, ii(»t\v i iimrkiiifis of nay perhaps 1 Uttalcsliiiiiii;^' Idack on tlic vnicx, ((iiiliiiiicd a> a hiu.iil slript- (hroailt'st tNdow) to tilt' aiitt'iiiia' : on tlic siili'S tlif yellow of tli*> lact' coiitiiiiU's up Ull^Ii^ tlii' f.vcs nearly lo the ocelli. Aiileiiiia' it'ihlislihrown, hiaekish ^the a|)iiei' |iart ol i !ie thii'l joint. Thora.x < <>'■ ^''^ ddeH Willi a yellow sliipe, leaehin;,' from the hiinieii to thesntiire, where ittoshaiply tnineate; post alar callosity also yellow. S'litellnni wholly light .\«'lh)w, taiiitl..' ledflish on the disk; pile l»la« k. Alxlonicn hlack, or brown; lirst sej^iin'iil, except a slender traiisvers*' spot on each side bfcbind, yellow ; se<'oiid .sejjnu'nt with a slender yellow anterior fascia, and a Itroadcr one in the middle, altoiit a third of the width of the se^- HWlt, straijiht and Init sli;;litly widened at the sides; third sef,'ment wftti !' Itroad arcuate hand, not cpiite toiichinj; the jiosterior anodes on tll^sides; fourth si'j,'meiit with two slender parallel stripes, having; a fllikth'i' l>l;»('k stripe between them, on each sid<' a broader, ol>li(pie, oval lat the uialea: gpijj^^ touchin;^, or narrowly separated from the aii'eiior ( ed of tlieyel- l0# hni<;itiilack. Jk widely spread and common species. 1 have it from (Jonnectieut, New Hampshire, Iveiitiicky, t'olorado, Calilbriiia, and Washinjrton Ter- ritory. S(!hiiier and \'. d. Wulp record ii; from South America. elli as ill Sjirpl JkJlOgrapta fiacta. this latter aUil Allmirniita frucln O^U-n Sinkm, \\\>\. Diiii.. lilil. ua Say. JIfl/>//>inent brown alon u: 98 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. ^^ Hahifat. — Siuita ]Moi»i(ia, Califonii.'i, February 20,1876. A sin? male." The chief differences thar this description shows from A. obliqua in the bhick stripe on the fsKie, and the first abdominal segment b«: black. MESOGRAPTA. Toxomerm Macquart,Di|it. Exot., ."ic Suppl., 9'.J, 1855, Meitof/ramma Loew.Centur., vi. 47, IHOr*. Meaiv/rapta Loew, Ceiitur., vol. ii, ji. "jyO, 1872. Small, somewhat ehmpate species, thinly pilose, shining black, r 3'ellow markings on head, thorax, and ablo 2. — Scutelliiui yellow ; legs yellow, except the hind tarsi Soh Scutellnm black with a yellow margin; front of female much narrowed ;r r* hind femora in part bluck parvula, Bci ^^p,,j Scutellnm black or biowti witln a yellow border; front of fennile above i: ^^ little narrowed; hind femora wholly yellow marginata, __^ 3. — Front of female only a littlt! narrowed above; third-fifth abdominal .-f^t VWiex ■with narrow lateral yellow margins maigiE p|i|tei' Front of female much narrowed above; third-fiftli abdominal segmeutu iH'; 4t|j^in( low on the margins pc m^p ^ For other species, see descriptions, and also appendix. shitiin Mesograpta polita. Whitis Scava polita Say, J. Acad. Phil., iii, 08; C. ipl. Wr., ii, 77. With a Syrphua politus Say, Amer. L,utoiu,, i, pi. xi, tti jKirriila Ostvn Sacl^on, Cat. Dipt., 125. irfl/>(7f//.— Georgia!, Florida (Lw.). d,?. Length, 5 to 0""". Black, somewhat metallic. Face yellow, rilVery i)ollinose on the sides. AnteniKc yellowish^ somewhat infuscated. Front in female very narrow al)ove, shining greenish black, bronzed at veiftex, yellow on the sides below the vertex. Cheeks black; lateral POSteiior orbits silvery. .Median dorsal cinereous stripe only moderately dirtinct, on either side of which, and more outwardly, separated by a more shining >,tripe, a second, morcolivaceous, less shining one. Pleural shining bluish black with a yellow spot on the mesopluraj, and a more whitish one below; no si)ot above the front coxae. Scutellum black, with a yellow margin. Abdomen black ; o])aque, excejjt the tirst seg- ment, an anterior and jwsterior band on the second, and a posterior band on the following segments, shining; yellow markings as follows: base of the first segment, sometimes a .slender band on the second, en- tire or interrupted, a broader anterior liand on the third and fourth segments, inteiini)ted, and jjroduced into a process posteriorly at the inner ends; in the interrupted spaces a slender longitudinal stripe; on ii ^li.U.*Jt.f»*- •i I I' ',< I' 11 .■' Ml , t'l' ', ' >Vil' A' f !|! F : ill I'!': I , , V III 'til I II [I ■'1 I- (!:■ ' I 100 IJUIiLETIN 31, UNITKD STATES NATIONAL MUSEUM. tlio fifth si'i^riKMit ti broiully intcriiipti'd lasciii, in the male iiioie sl('ii(l> Ih.m in tin' female, son>etinies yellow with three lar^i' oval l(»n,iiitn(liii,. Rpots. Lei:s yellow; hiinl femora with a ralln-r broad, preaijical, lihn, riu,i>'; the hind til)iic, exc'ei)tthe base and tip, blaek; hind tarsi iikhii, less reddish, blackish toward the tip. Winjjfs m-aily hyaline, siiyn, hnbinseous. Oiie male and two female, sj)ecimens from Georgia. Tiie males liav- IIk- abdomen obsctnrely brownisli reddish beyond the second sejji'iiicn; Avitli narrow indistinct blackish nnirkinjis. From .1/. (iciiii)t«rti(!i much longer i)roj)ortionally than in .1/. geminufa. Mesograpta marginata. hmera marfjinata Say, J. Acid. Phil., ii, 92, (i; Coiupl. Wr., ii,80. Sijrphm maryinutiiH Wiedcmanii, Aus.s. Z\v. Ins., ii, 14(5, 52. Mes. Habitat. — Atlantic. Southern, ^Middle, and Pacific States! 9. Lengtli, 5 to (»""", Face whitish yellow, thinly poUinose, chcel black. Antennae reddish yellow, a little fuscous above: arista blad Front oidy moderately narrowed above, greenish black, shining at rt vertex, lightly yellowish pollinof>v. below; on the sides below the oc({ jiarrowly yellow like the face; posterior orbits yellowish ])ollinosi', ; some retlections silvery. Dorsum of thora.x olivaceous black, but lit; (shilling, median cinereous stiipe distinct, bordered nai'iowly on la side with brownish; ideumii shining greenish black : beside the ycllr spots on the me.so and sterno pleura', there is a third, minute one. iilm the front cox;x3. Scutellum yellow, with black ])ile. Abdomen blar^ shining, narrowly margined with yellow ; oval, tlatteiu'd ; first segiin: at the base, second segment with a median cross-band, thiid a' fourth segments each with a median line and a somewhat oblicine lai. spot on each side attaining the base of the segment, fifth segment wi ' two oblique spots conlluent at the tip, yellow. Legs ye!low, the lii:, tarsi a little brownish, blackish at the tip. Wings nearly hyaline. This description applies to twenty specimens from Xew York ai Connecticut, which agree quite with Say's descrii)tion, and hence iii; be considered as the typical marcjinata. This species is variali scarcely any two specimens being preciselyalike in tlie abdominal inai ings, which makes it seem strange that Loew should base a species up' such characters. The head in the male ditfers only in the frontal i: angle being yellow and the vertical triangle black. Of the diflVn variations in the abdomen the following are such as my specinu'^ show Ten specimens from Colorado, all males, are rather smaller than Eastern specimens and have the scutellum wholly yellow, excei)t \ lai; JSEUM. SYNOPSIS OF NORTH AMERICAN SYRPHID^. 101 Ic iiioie sIcikI, •ill lonjjjitudiii,; ircapiciil, lilar, (1 tarsi iiKucii lyulino, sti<;ii). riie males liav. I'COlid St'<>lil('!i: niii)utia, wliii; , leiMora, wim. i)t curved aiL e, iu M.parm ,80. ,tes ! lUiiiose, clicet .': arista blafl. . shiiimj'' at t[ below the ooc: sli i)()llinosf. : black, but lif I'l'owly on i;ii side tiie yell iiute one. ;ili" ^.bdonien lil.H'. lirst si"j:m-: md, thii'l ir t ()l)li(iue lai; h segment wi' «!lo\v, the lii: ly liyalint'. New York a: and hence iiu es is variaV. bdoniinal mar e a species u]' the front all: )r the dinii. ; my speeiiiK: mailer than i ^•, except a k. leddish color on the disk, the yellow band of the second abdon)inal «egiuent rather broad, and the tiiird and following segments wholly Obscnrdy reddish yelh)w, except a small circular black spot on the middle of the lifth segment; on two of these are small ob.scure blackish marks on the third and fourth segments. Three more males from Colo- rado and four from Western Kansas have the black longitudinal and transverse si)ots very distinct, so that in most of them the yellow is oouflned to oblique spots nearly as in the typical forn;. A single fe- male from Colorado, another from Montana, and several from Western Kansas, have the oblique spots of the third and fourth segments coales- 'oent, leaving only two minute spots in the middle near the front, and in the tifth segment there are a circular median sjiot and two obliipie feteral elongated ones; others, females, have the yellow spots distinct, |iB in the typical form. In several female specimens from Georgia and Florida the abdomen ll cliietly black, the first segment nearly wholly so, tin? second either holly black or with two small yellow sjjots, and the yellow triangles the following segments small and slender; in some the scutellum is ^stinetly darker above, in one almost blackish on the disk; the speci- iien tVom Mcwitana, however, shows the same blackish color, and here ilie ,m11()w s|)()ts of the abdomen are confluent. A «lozen other speci- liens from (Jeorgia and Florida present no essential dilfereiices from IJ^e Western and Noi'thern ones. Specimens from the White ]Mountains lire precisely similar to the tirst-mentioned males from Colorado, and, ||ence, it is probable that such specimens will usually be found in high latitudes or latitudes. Specimens from Connecticut agree with all the liariations i)reviously mentioned; others from Washington Territory and ^aliloiiiia otl'er no peculiarities. i| 1 have no doubt from the study of the material here described that ManiroitriN is purely a synonym of mnnjiiiata. The only point in which 8l»ai)pears to ditter from the typical varieties is in the greater amount f yellow on the abdomen, — the bla(!k on the third and fourth segiiuMits nfined to two median spots and a posterior interruftted transverse Opind dilated at the angles, and the lifth segment with only a single flpot. Such specimens occur in Connecticut ami Colorado, as well as Ilorida, whence the species was described. One female si)ecimen from Connecticut and two from Calitornia, al- tiiough otherwise not diftering from the more typical form, have the BCUtellum a deep shining black, narrowly edged with yellow. There are so many interntediate forms that this character, though a striking one, is not of specitic value. \ Two liuile specimens from Floiida (Professor Iviley) have the abdomen wholly reddish yellow, except two small spots o'> the tirst segment. I WQ not sure that they belong to this species. 102 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 'ii ;l- I'i'i fii I ,1 ! V I !i. r n ) m m iV I I' I ;V I i ! Ujl! u^ I , I Mesograpta geminata. (Piatt- IV, fijjs. 5, 'm.) Scaeva finnhiala Say, J. Acad. Pliil., iii, 92, 7; C 'iipl. Wr., ii, 80. Si/rphiia gcminatiiH Wiedomann, Auhh. Z\v. Ins., ii, 145, 50. Si/rpliu8 iiilfrroiiaim Walker, Dipt. Sauiitl., 238. EiiiHvru8 privcriiun Walker, I.e. •225, Toxomcrui iiottitiis Maciiiiart, Dipt. Exot. 5" Suiipl., 93, pi. v, fig. 4. llrnifirnmina nomhiala Scliincr, Novara Expt'd., 347, note. Miyot/ropta qduiiiata O. Siickcn, Bull. JJiiiV. S band, attenuated in the middle and interrupted; third and fourth st. ments with a slender median stripe, broader toward the front, and pair of large spots on the anterior margin, on the third dilated bebii on the ends; on the fourth rather deeply marginate on each side li hind, the ends rounded and extending backward; fifth segment wi: the anterior angles yellow and sometimes two projections from the a: terior margin near the middle ; hypoj)ygium reddish yellow, on thek above shining bla(!k. In other specimens the yellow cross-baud of tt «ecoud segment may be contined to a small spot on each side or wlin! wanting, the median stripe of the third and fourth segment wbol wanting, on the fourth only four small anterior spots, those on the a; terior angles of the fifth very small, and the hypopygium almost wlinl! black. Front and middle legs yellow; hind femora black, except tl base, in the female less extensive, often only a brown ring; hind tihi indistinctly biaunulate with brown; and the hind tarsi brownk Wings nearly hyaline, veins mostly black. Twelve specimens from California, Washington Territory, and Co: Mecticut. Mesograpta auiulenta, n. h]). Habitat. — San Domingo! 3 . Length, .■).5""". Face and frontal triangle light translucent vt low ; cheeks narrowly shining black, behind and on the j)ost<'rior orlc with a greenish tinge, (covered with light ,velh)wish i»o]len. Eyes l)iiii: contiguous; vertical triangle black, elongate; o(;elli remote from tluM'^ tex. Autennieyollow ; somewhat blac k ish above. Lateral stripes oiil raxei utripi elong Scutt ' red, ( first with large hiud aoal; brow Willi 9. yelh» spot third (Begni nairo Fo' lUSEUM. ii, 80. , fig. 4. t. Dipt., 125. I. (Ml (Scliiiior). (1 aiitiMMifpJi;'; iiiai soiuetiiiH'> ?, sliiiiinji' bl;n, ior orbits tliitkl \h opiiqiie lint. striiK' only iiuk oval yellow .sp' ;low it, narrow: Abdomen biw •al in the fcinali as follows : tit. w median ci> [ and fourth si/, the front, and d dilated bcbii on each side l^ h sefjnient \vi: )ns from the a. 'How, on the 111 ross-band of ti h side or wlinl segment wbol those on the a; m almost wliol lack, excej)! ti 'h\g', hind tili; tarsi bro Wilis ritory, and Cu: SYNOPSIS OF NORTH AMERICAN SYRPHIDiE. 103 translucent vt l)Osterior oi'lr n\. Eyes hiict ote fioni tiuM'^ fal stripes olii rax entire, yellow; dorsum black, but little shining, with three olivaceous Htxipcs, separated by about their own width ; pleune shining black, an elongate spot on the mesopleune, and an oval one below it, yellowish. Scutollum black, with a narrow yellow Itorder. Abdomen yellowish ' red, or reddish yellow, with u briLilit golden-yellow metallic rellection ; first segment more biownisli. Ia'}X!< reddish yellow; front femora with a siiKil! l)la(!k s|M)t above iieiir tliel)ase; ui'ddle femora with a largt-r s])(it in tile saim? placi', and the last two joints of the tarsi black; hiud lenioia with two incomplete black rings, one basal and one preap- ioal ; liind tibiai also with two narrow black rings; hind metatarsi brownish, and the last two joints of tarsi black; hind femora thickened. Wings lightly tinged with dark ; third vein gently sinuate. V$. Front shining black, narrowly yellow on the sides. Abdomen yellowish red, but little shining ; the (irst s(>gment on t\w. sides, asmall spot ill the niidroad median black stripe. Four sjiecimens (two 3 and two 2 ), San Domingo ((1. F. Frazar). Jfesograpta Boscii. Siirphiin lioHcii M;tciilchelhm Mactiuart, Dijit. Exot. Icr Su])pi., 138, liti; tab. xi, fig. 12. Mesograpta subannalata Loew, Centur., vi, if*. — Cuba. Mesograpta variabilis V. d. Wulj), Tijdsclir. v. Hntoni., xxvi. — Guadeloupe. . (!' SPIIyEROPHORIA/ «Si/)/icBro^>/ioria St. Fargeau and Scrvillc, Encycl. Metli., x, 513, 1825; Macqnart, Dipt.du Nord. 18'.;i>. Melithreptus Loew, Oken's Isis, 1S40, 57:5. Slender, small species, of a bhiclv or metallic green color, with yellow abdominal bands and yellow lateral stripes on the thorax. Anteiuiic short, a little remote at their base, tliird Joint oval, arista dor.sal, bare, or slightly pubescent. Face l>elow son^ewhat projecting, lightly tuber- culate, yellow, with or without a median black stripe. Eyes bare, con- tiguous iu the male; ocelli remote from tlie vertex. Thorax with yellow, interrupted or entire, lateral stripes. Sciitelliuii y«'llow. Abdomen slen- der, elongate, pointed at the tip in the emale, clubbed with projectin{( hypopygi im in the male (ex(!ept «S'. micrura). Legs slender, simple. Wings in the male often shorter than the tdxlomen; neuration as in Syrphus. Type of genus, *S'. avripta Linnd. Tliis genus is a very difficult one, and 1 have not attempted its thorough solution, which must be left to the monographer with an abundance of mtiterial at his disposal. In Europe much uncertainty yet prevails as to the specific characters. * Sep'iiiJO'-, sphere; ipopii, bearing. SYNOPSIS OK XoinU AMERICAN SYRPHIDiE. ior> TABLK OF SPECIES. 1 _|lYj)oiiyK'""' ^''"'y •"""" ' L'oxio aud UaHi) oi" femora black micrura H.vi>ni'y;ii'"" '"''w 2 2.— C'oxu! iiiid liiisi! of ftMiiora blackish melaaoaa C'oxic oral least femora not lilackisli (^ ) 3 3,_H,v|ioi).T;;iiiiii with a tuft of yellow pile below the globular part in front, cylludrica Hypopy^rinm without such a tuft, base sulphuripes For other species see descriptions. Sphcerophoria cylindrica. (Plate IV, tigs. 1(5, ICa.) SiirpliHH v.iilhuh-ivHK Say, Amcr. Eiit.. i, pi. xi ; Compl. Wr., i, 22; Wiedemann, Au.sH. Zw. Ins., ii, 1:}H, :W. Sphocrophoria coniUina Maccpiart, Dijit. Exot., 2" Suppl., (j2, 4. Habitat.— "Sgw England, Washington Territory! | nen in UMijitlt sides to m\ id, thirtl, all. \v {n'oss-baiKp y internii)!^^ >w; the taKi With these two spccinn'ns were st^veraj others, all males, ajjreeing 3losely,excei)t tiiat the iiietallio eoloi' of tin; ahdomen is more extensive. ?\vo oHier males havted ; fifth segment with fellow .sides and twoy<*llow streaks in tne iniddle. Ilypopygium black, |reiy small. Legsdark brown or bhu'k ; the »'nds of the four front femora lore or less brownish-yellow. Wings with a brownish tinge. Four si)ecimens, Southern California. |lphaerophoria scripta. MuH'o nrripfa Liiiii(^, l';iiiiiii I^ist'c., i>. \SiiK ('oiinp» f/nnmnliiM .Scojioli, l^ntoni. Cartiii)!if','i, 9t)."), Siirphus nciipliix l'\'iliriciiis, S|M'c. Ins., ii, HM, (i'2 ; id., Enf. Syst., iv, :<0S,,113; Moifjeii, Syst. IJcsclir., ill, :<'il, 7:'>. ^ca-vaficriptti Faliiiciiis, .Syst. Aiiti., 2'>2, IT. Sphwrophnria nrripla MiUMiiiarl, Hist. Nut. Dipt., i, ;v>l, 1; Zotteistcili, Dipt. Scand., ii, 7()(>, I; AValkcr. List. ctn.. iii, 5'J:5. MclilhrpptiiK sryipiiiK Sclii!icr. I";nni;i Aii-^lr.. i. lUii: \. d. Wiilp, 'rijdsclir. v. iiutoiii, XX vi. llnhitnt. — Canada (v. d. Wul))), iMirope. i' Leii'.'th, 10 to rj""". Abdomen of the male extending beyond the riiifis, the first yellow band (contiguous with the lateral margins. Yel- )\\ bands distinctly limited only on the front part of the al)domen : on ■i V i! / (! 1 ''' i"l ' -I'M' m 'I \^s\ \\ I " i'w. I I 1 it J'., ti ' I ^ , ii 108 IJUI.LETIN :il, UMTKI) STATKS NATIONAL MT'SEUM. tho i)ostori()r i>iirt llu' hlnck yroimd color almost wholly obsolete, r for tho ^'icator part chaiijiiMl into a brownish color, in wliicii varioibi tbrmctl vittnlu' ami spots ai)i>('ar. Thorax dark inotalli(! sr^tMi, Mh shiniiif;, with three, often indistinct, lotifjitiidinal black stripes, mil yellow, entire, lateral strijies; scntelluni yellow. Abdominal bands front and behind somewhat euiarK'iiiate (ansjferandet), the first iiiiJ fonrtli sometimes interrni)tej low. 9 . Front yellow, the vertex black, extended as a median stripe iipin!] to the antenna'. Abdoinen broad and wholly bhuik. with f(mr ycllnJ bands, the first usually inteiiupted, the followinfj ones emarfriiia't| behind, the fourth broadly intei iui)ted. — Schiner, 1. c, translation, The species is a veiy variabb' one. and very common throughout EtJ roi)e. I jjive it en the authority of Mr. v. d. Wiilp. 1 have not itlciitJ tied it with any certainty mys<'lf, the s))ecimens designated by a umlj S. cj/liiHln'cd approaching it most closely, but differing in the abdn nal bands being neither emarginatc iu»r interrupted. Sph3eroplioi'ia dubia. Sjiliwrojiliorld (Inliiu Uinor, Ann. Hoc. I'".nt. Kr., l^-'-t, KH. Hahitat. — Calilornia. J. Long. 7""". Antennis testaceis, ajiice infuscatis, fronte et I'm pallidissime llavis ; thorace nigro, ])aruui ivnesccnte; caly|)tris cr !i teribus testaceis; abdomiue fulvo, basi late, \ittis tribus transviiM' latis, liueu segmenti (juinti intermedia, bre\i, nuu.'ulis duo, utriii(|i lunulatis, opjjositis, sexti ma(!ulis simillimis, nigris; ]»edibus ll;i\ tarsis tlavo oV)S(Miro tinctis. AntcMines d'un faiive i)ale, bords superifurs ct cliete, bruiis; I'iUTt front entierement d'un blanc Jaunatre; thoi'ax d'un noir un i)eu bnnizi:^ cnillerons et balanciers testaccs; abdouu'U fauveavecla base largciiif:.p noiie, itu'isions des 2" et 3'" segments, bonis du -t'', converts jtar troJ larges baiules (ransversales, noires, T)" avec une !>ande dorsale et (Icni nmcuies en forme de croissant, opposdes parleurs j>ointes, (»" avec dm macules semblables, le tout de coideur noire ; ])ieds d'un jaunt? assfl pale, tarses d'un brun clair, un pen roussatre. Ailes ne dcpassant pal Tabdomen ; face saillante, obtuse, calleuse; antennes, .'V= segment presqii| orbiculaire. I sijccim. — IMgot, 1. c. Sphaerophoria pyrrliiiia. Sjiliiiroiilioria fijirrhino l!i<;()t, Ann. Soc. luir. Kr., l^-dt, 101. Habitat. — Califoinia.. c^. Long. ti""". Antennis fulvis, apice fuscis; facie Hava, callositai fulva ; thorace leuescente; calyptris feiealbis, halteribus llavis; abdoiniil JM. SYNOPSIS or NORTH AMERICAN SYRPIIID/E 109 l»l)SOl('tc,i li viiridiisl rcoii, rrclilj ■triiM's, aiij il bands ; le first ill* i.sli yt'lM lish-.V('ll(nl i soMii'whJ with sliorj ^ownislive tripo lu'iiif four yelldi emavgiii,! slntioii jughout EtI (i not iilciitl by (I \um the abduiu lite ft hi: )tris ct liii rvaiisvi'M (», nt!'ini|i ibiis tl;u iiiKs; luccrt K'll 1 in Ill/I-: iir hiruciiii''' s i)ar tn ale et (Icr:; ' av('<' tl''ii' jauiie assi )assaiit pii eiit piosiii; Ifiilvo, .sc^'iiu'iito 1" iiij;i<), linea intermedia \ ittistine traiusversis tribus, Itertiriiiiterriipta, iua(;iiHsst'<;ni(Uit()ruiiHjuartiset(iiiiiitis,ulriii(|iie,iiif;ri.s; IiicdiiMis pallide, testa«!eis, tibiis i)(»stic(iriini basi, taisisijue tolls, pulli(l6 lliilis. Aiili'iines laiives, i'Xtremite '' se-fuient ct idiete, iioiratres; face Ll'iiii j;niii(' hlaiu'.iiatr<', iiK'tliaiis (I'liii i'aiive biisant ; front jaiuie: tliorax lliroii/e; abdoiniMi d'an fauve i'on;;t'atre, 1"" sej;rni'nt noir, une lif^iie liiinliani' interroniime. idar^ie vers les incisions, an (>'' sejiinent, tiois llarfit's bandes transversales sitnees snr lesdites incisions, la 3" donble- linent interronipue, deux jioints arrondis, d(^ (duKpie cote, sur le 5% et Luatre macules irreguliere.s sur le G'' segment, noirs ; cuillerons blan- K-Iii'itrcs, lialanciers jannes. Ailes ne dcpassant i)as Tabdonien ; face sail- llinitc, obtuse, calleuse ; antennes, 8" segment orbiculaire. 1 speciiu. — jlJigot, I. c. |8phaerophoria infumata. Sp-pliiin iii/iiiiiatiin Tlioiii.soii, P^iii^ciiios Ro.sa, 501. llahitaf. — California (Thomson). JDneo-niger, epistomate, pectoris niaculis lineaque frontali utrinque Ijilbido iiiargaritaceis, antennis, vitta laterali abbn^viata thoracis, sou- jteilo. i>edibus fasciiscpie abdominis llavis, alls leviter infunmtis. c? 9- [Long. ;■)-()'"'". I'ra'cedenti [6'. ,suli)lturi]H'.s] simillimus sed parnm feneo-nn(!ans, an- tennis articulo .'{" ovali-rotundato, linea media im])ressa frontali obso- li'ta,;L;nIa ameo-fusca, alis leviter infumatis, abdomine faseia 1" Integra, coxis antcrioribus nigricantibus, apice tlavis distiiictus. Mas dill'ert coxis omnibus fusco-nigiis, npicu' pallidis, abdomine seg- ^Mentis 4-0 rubris, signaturis fusco auieis vix ullis. — Thom.son, 1. c. ADDITIONAL NORTH AMERICAN .Sl'ECIES. pli^rophoria fulvicauda Hij^ot, Ami. Soc. I^iit. Fr., l-'-'4, 101. — Mexico. Sphasrophoria nasuta lii^'ot, Aim. Soc Kiit. Fr., 18c<4, lO;?. — Moxico. Bphseioplioria pachypyga bi<;;<)t, Ann. Soc, Enl. Fr., 18-^4, 104. — Mi'xico. Sphaerophoria picta Macinuirt, lli.si. Naf. Diiit., i , .").');5, s ; Zotterstedt, Dipt. Scand., ii. T7-J: viii. I'lHI,"; Holnif^riMi, Imh. Nonlf^rotMil., 100. — Greenland. Siirpliiiti /licliin Mciircn, SyHt. Bcschr., iii, :{'i(), 77. Mclillireptii-i ])i(lii.i Schincr, Fauna Aastriaca, i,H17. Sphaerophoria picticauda 15i;;ot, Ann. St the (ll'tli s('<,'iiKint and flic liypo- pyffiuiii, Imt slijjlitly sliiiiiii^'; mccoimI sc^'iiioiit iicross the luiddlt^ with two coah'scent transvi'isc spots; the Ihiid and fourth scffnieiits on the basal half reddish or l)r(»\vnisli yt>llow. Coxu' and \vftn yeUow, the four front femora and tibial in tlu' niiddh' yellowisli brown, the hind h>t,'s, with the exception of tlie base and extreme tip of the femora, bhielv. Pilo of the wiiole body short, soft, and spaisc. ^Vin^^s hyaline, the outer part cinereous; stiyma brownish yellowisli. One specimen, District of Co!iiml)ia (Theo. Pergande). A female discoviTt'd with the last, wliicii 1 have since examined, lias the second abdominal st'<>iiii'nt with a broad median band, the tliird sej>- nu'iit, ex< <'i>t the narrow hind niarj^in, and the anterior two-thirds of the (ointli segment, all i)ure yellowisli red. The abdonu'U is of nearly equal width tliroiijihont, sijarcely at all wider tiian the tlioiax. The third joint of the anfeiiiiiu does not appear to be produced into a cylindrical pro- cess, but the pi'ojection, which is as long as in the male, seems to bo wholly composed of the style. "I ;l If NEOASCIA, NOM. NOV.* Ascia Moigeii (iioii Sc'oiioli), Sywt. J'.isclir., iii, IH,"), 1822. Small, slender, nearly bare species, black or nu-tallic green, with or without reddish or yellow on the abdomen. Antennre shorter than the head; third joint oval or obtusely pointed; arista near the middle of the Joint, bare. Face black, even, without tubercle, conically i)rodueed downward and forward, so that the profde is gently and evenly con- cave from base of antenna} to oral margin. ICves bare, separated by the front, which is rather broad in the female, narrower in the male. Abdomen about twice as long as the thorax; second segment narrow, widened ]tosteriorly ; third and fourth broad and arched; in outline short club shaped. Front and middle legs slender, hind femora very much thickened and with a row of short s[tines below; hind tibite bent. Marginal cell of wings o])en ; anterior cross-vein before the middle of the discal cell; the last section of the fourth vein joins the third in a right aiij;le, the anterior angle of discal cell also a right angle; third longi- tudinal vein straight. Neoascia globosa. (Plato IV, figs. 10, lOo.) Asciu (jtoboaa Walker, List, etc., iii, 546. Ascia metalUva Williston, Proc. Am. Phil. Soc, xx, 315. Ascia iiasiita Bigot, Annates Soc. Ent. de France, 1883, 327. Ascia qiiudrinotala Bigot, ibid. Ascia ulbipes Bigot, ibid., p. 328. Habitat. — New England, Oregon! 9. Length, 3^ to 5™". Front bronze black, shining, delicately- roughened. Face with a bluish reflection, lightly covered with whitish *N^of, now ; ascia, a mason's trowel. M II 1)1 if ' ■ ' '(, til "Hi IS 112 nuLLKTiN :ii, uxrrioD states national museum. ^i'^ I ' 1 1 l>()lU'ii. AiitciiiiiL' bliickisli, tliii'd joint on \hv lower juiit red. Tliorail motnllir giiM-nish hrun/A', niodfiatcly .sliinin^', li^^litl.v ronaiu-ned. Abdi f men li;,'litl.v ]>un(;tnl;ite, wlioUy black, modi'iatoly sliinin^. 1a'<4> vcllowj front and middle leniora black, oxcei)t l)aise andtip, tlu' hind IciiioiJ except the l»a,se; hind tibiiu with a rin^' beyond the niiihlle blackisL: and iirst and last Joints of hind tarsi black. Winy;s nearly hvaliiiij sti;;ina dihitely yellow. A sin;;lc female specimen irom Connecticut a^^rees with Walker's di] scription, and may tIn'refore be considered ty]»ical. The si)ecies, liow over, either varies remarkably in its abdomen and ley.s, or tliere arc J iiund)er of closely allied species; bein^' unable to decide this from tlit| material 1 have, 1 will describe the difterent varieties. First var., albipes Bigot, 5 , ? . Abdomen with two complete rcddisLl yellow bunds, front and middle lejj;s wholly yellow; in the male theliim; tibi;c chiedy black, bands sometin»es interrupted, fourth segment an(l| Lyi)opygiun» bronze metallic. Seven si)ecimens, Connecticut. Second var., 9. Legs as in p''"ceding, abdomen wholly black. Twui specimens, ( 'onne(ttieut. Third var., S. Abdomen with two interrupted bands, front audi middle femora and tibijc with a black ling. Two specimens, Connecticiitj I'ourtli var., metaUicn, 9. Abdomen wholly black, or third segiiiei Avith two sn);>.!l spots. Legs black, base and tip of tibia- and tarsi yellow.] tarsi otherwise brownish. Two si)ecimens, Oregon. One male from the last i)lace has the base and ti])sol' femora and taisi| moi'e broadly yellow, and the abdomen with two bands (var. 7i(i)iii1(t ']. ill these last three s|)ecimens the third Joint of the anteume seems tul be shorter and more rounded at the extremity than in the Eastern s[)OL'i jiiens. Possibly they may be entitled to specillc rank, but 1 stioiijihl suspect that all these diflerences are but varietiesof one widely distiibj uted species. The si)ecies described by Bigot as nasutu has a broad baud on tLcl second anil third segments, thelatter one sometimesdivided in the middle, [ The legs are yellow, the femora black towards the base (the hind pair, except the tip), the tibia; with a broad ring of the same color, the front tarsi with the first aiul last joint, the middle pair with the last joiut, and the hind pair with the under side of all the joints largely, black, | The sjtecimens were, from Mt. Hood. A , quadrinotata, from the same place, ditferschietly in there beingfoursi)otsontheabilomen,an""". Front black, thickly (lusted on the sides, leav- ing a slender, shining strij)e, interrupted in the middle. Antennte yel- low, third joint rather large, orbicular. Face light yellow, blackish iu the middle above; cheeks an 114 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. broader than long. Coxa? aiul legs white; a broad preapical ring on the hind femora, hind metatarsi, and the last two joints of all the tarsi, i lack; two small, incomplete rings on the hind tibice, blackish. Wings hyaline. g. Thorax blackish above, sometimes wholly black except the hnmeri and below them. Abdomen of moderate length, sometimes nearly black, except the. basal part of the third segment, the fourth segment always more brown than in thefenmle ; front and middle tibia? sometimes faintly brownish near their middle. This species differs from lohata, to which it is most nearly allied, be sides the coloration, in the anterior distal angle of the first lujsterior cell being more acute, and the abdomen of the male being very much less slender. Four female nnd three male specimens, captured by Mr. Eugene L. Keen, in Fairmount Park, Philadelphia, May 21. The black markings, in both male and lemale, vary much in intensity on the abdomen. Sphei^na iiifuscata. (Pluto IV ; fig. 12.) SplnyiiKt infuncata Loew, Cfiitiir., iii, 23. Hahitat. — Sitka (Loew), Oregon! S ,9 . Length, .") to 0:^""", of wings 6J to G|""". Head black, opaque; IVont of male: narrower than that of female, and clothed with longer, bliick pile, Antennse black. Thorax fuscous bUick ; the dorsum with d;'licate pile, longer and more obscure in the male than in the female. Scutelluui and metanotum of the same color as the thorax. Abdomciii shorter than in the species indigenous to Europe, and attenuate near the base, in the luale fuscous, in the feuiale reddish testaceous Leti's of the male fuscous, of the female reddish testaceous. AVings larue. (lilut<^ly inl'uscate; stigma elongate, fuscous, apical angle of lirst poste- rior cell acute. — Translation from Loew, coiupared with the tyi)es. A single specimen from Mount Hood, Oregon, probably belongs to this sjjccies, most especially characterized by the short abdomen, the liu'ge wings, and acute jiosteriorcell. The specimen, a fennile, however, has the abdomen and legs wholly light-yellow, and thorax more brown tiian black; it may be teneral. Sphegina lufiveutris. Sphfyina riifirciitriK Loew, Ct'iitur., iii, 2'i. Habitat. — New York (Lw.), Wasliington Territory! 9. Length, (J.j""". A very variable species. Ifed. Dorsum of thorax, ex('ei)t the humeri and posterior angles, always black, .sometimes the rlioi'ax almost wholly black. Front black, oi' e(|UJil wi.«'\v Hampshire (Dr. (ieorge l)imnu>ck,*Nos. 14!M-7-oint out the differences. The female agrees tlironglumt, except that the humeri and interrupted bands of the abdo- I iiiei! are light yellow. The third joint of the antenna' in the nuiles is more blackish than luteous, Iheface is blackish on the iii)per part; the reddish color of the humeri and ])ostalar callus not very apj)arent in all but one spcu-imen. In the Eastern males the distal half of the second sefi'ineut of the abdomen (in one specimen the third wholly and the fourth except a darker band in the middle) is red, the hyi)oi)ygiuin more black- M'' I, '.'. i ^^' . i f 1 i V 1 ll' 1 't ' 1 1 1 116 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. ish ; ill the Western specimen the abdomen is more nearly as Loew de- scribed it. Ill all the male specimens the hind femora are brownish red, not black. Type specimen in the Loew collection at Cambridge examined. BACCHA.* liaccha Fabricius, Syst. Autl., UH>, 1.-^05. Ocjiptamii.i Macqiiart, Hist. Nat. Dipt., i, o.jO, 1834. Bnchit Scliiner, ct auct. Medium size, bare species, usually with long, slender abdomen, nar- rowest towards the base, but often shorter and not narrowed at base. Head large aii3, '80), Georgia ? The male has the <',ostal and marginal cells hyaline, while in the female they are both in large [)art brown, yet it seems almost sure that they belong to the same species. Baccha lugeiis. Bavdia liu/ciis Loow, Ceutiir., iii, 24. Habitat.— :Sew York (O. S.), Southern States! c5 . Length, 10""". Front black-bronze, black pilose, above the an- tenna' yellow spotted. First two joints of the antennai yellow, black ])ilose; third joint Vdack. Dorsum of thorax and the scutellum black- bronze, moderately shining, the color of the scutellum somewhat red- «lish bronze ; lower half of pleurje white-pollinose. Abdomen black. oj)a(iue, not clavate near the tip, the base ahd apical margin of each segment shining fuscous, ultimate segment wholly shining, sub-viola- (reous black. Legs black, front and middle femora, except the tip, base of hind femora, and of the front and middle tibia^-, yellow or yellow- ish red. Halteres sordid whitish, head with a black spot. Wings ?, i '' ' iV SYNOPSIS OF NORTH AMERICAN SYRPHIDyE. 119 n, bfise Wiugs sub ciueresceiit, all the veins, except the last segment of the fourth vein, broadly clouded with black, confiueiit near the costa. Face yel- low, obsouie on the sides, with opaque yellowish pollen. — Translation. Two male si)ecimen8 from Professor Kiley without locality (No. 48"), .June 2, 1880,) evidently belong to this species. The front, how j'ver, lacks the yellow spots above the antenna;. The face in prolile is narrow, only a little widene«l at the tubercle, nearly perpendicular and straight above it, antl very receding below, the cheeks linear, and the I'ycs v<'r^v convergent below. The meso-pleuric are whitish pollinose, as well as below. The legs are yellowish, the end of all the femora, the end of front and nnddle tibiit;, and nearly all of the hind tibia', and all of the tarsi, brown. The small cross-vein is a little beyond the middle ot'tiM' discal cell, and rectangular; the clouding of the wings along the veins, brown. Baccha fuscipennis. (Plate IV, fij;. 8.) Jitiirha fiiNcipcnuiH Say, J., Acad., Phil,, iii, 100; Coiupl. Wr., ii, 8(5. OciiptamiiD fancipeniiiH Mat-quart, Hist. Nat. Dipt., i, 554, 2; tab. xii, fig. 1"; v. d. \Vul|., Tijds. V. Eiit., xxvi, 1». Sjitplnin Amixsns Walker, List, etc., iii, .')89. Siiriihiia Itadara Walker, List, etc., iii, 590. ()c!i}il'""'. Black, moderately shining. Front shinhig hluc black ; in the male tlH> frontal triangle large, shining black, narrowh yellow on the sides. Face yellowish white, with a black stripe in tlio middle, often obsolete. Antennje black. Abdomen rather broad, di- pressed, widest at tip of second segment, thence slightly narrowed ; in color shining purplish black. Legs black. "Wings black, towards the posterior nuirgin less so. Three male and one female si)ecimens, San Domingo (G. F. Frazar.i One male si)ecimen, which is apparently the same, has the frontal tri angle nearly wholly yellow, the antennae in large part yellowish, a small spot on the humeri and another on the post-alar callus, yellowish red, the scutellum obscurely yellow, the abdomen chiefly opaque black, with a large obscurely reddish-yellow spot on the angle in front of the second and third segments, and the four front legs chiefly hue ous. It isapparently an immature specimen. Loew's specimens showed in a less degree sinnlar difl'erences. (" Scutellum aeneo-nigrum, vel aineo-i)iceum. Abdomen media segmentorum singulorum parte purius nigra et magis opaca.") The species differs from B. diviidiata chiefly iu the wings not being hyaline on the outer part. Baccha cognata. Baccha cognata Loew, Ceiitur., iii, 27. Habitat.— ^e\v York (O. S.) ! 9 . Length, "'"'". Blackish bronze, head concolorous, the lower half of the face and the antennae yellow. Humeri and pleurae yellowish. Ill SYNOPSIS OF NORTH AMERICAN SYRrUID.E. 123 tbdoiiH'U blackish bronzf, basal fascia' of the third aiul fourth soy- ut'Uts, soiuetinies also of the fifth, yellow. Wiiijjs subhyaliue, apical liiarj>iii aiid the stitfina smoky, the base of the latter black. Similar to 11. ohncuriconiin. Head bronze black, lower half of the face yiow ; front, except a median stripe, and face, except the tubercle, lliiiily clothed with whitish pollen, on tin* oc<'ii)ut more thickly polli- pose. Dorsum of the thorax black bronze, the humeri dilutely yellow- sh. IMeiine dilutely yellowish ov a little reddish, below obscurely eiii'sccnt. Scutellum of the sanu^ <;olor as tlu' thorax. Abdomen slen- lltT, black bronze, near the tip fuscous bronze third and fourth sejjf- Du'iits always, tifth fre<|uently, with a basal yellow fHS(;ia. Lej,'s yellow pilijilit reddish, hind femora near the tip, the tibiio and tarsi luiarly rliolly, dilutely subfuscous. Winjjs subhyaliue, lij;htly cinerescent, leiiis blackish; cross- veins lightly clouded; stifiiiia elonj^ate, smoky, ritli a basal black spot ; apical marifin of the winji; smoky. Triiuslation of the original, comj)ared with the type specimen at Cam- bridge. Baccha obacuricoriiis. Haccha ohnfiiriconiiH Lotnv, Ct'iiTur., iii, '^6. Jlavvlia uiDjHxIa OHtcii SackiMi, WestiTii Dipt., S32. Habitat — Sitka (Lw.), ('alifornia! i; I ^': '« k ii I' V U !■ I'lf If! In », I' » . '! I 'il ,■1 i M ! 124 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. Baooba torva, n. np. flahitaf. — 'IVxiik ! 9. Leiij^tli, !) to 10""". Cheoka oxtn-iuely narrow; t'ac*' wliollyyJ low. Front very nurrow iibov**, Nliinin;,' black, yt'llow on the sides iJ low; two Hniall, yellow n|»ots just above the base of the antenna". aJi teniiOB blavik, third Joint oval, thickened. Thorax black; humeri, a!4; Kiit. SyHtcin., iv, 310, IIM; Wii'ilciniimi, Auhm. Zw. Ihh., ii, ll(», W. Scafya dimitlitiila Kiildiciiis, Synt. Aiitl.. '^'.4, 'Jf). nviiptumiiH iliiiiidiatiiH Siliiiior, Ndvuiii I'.xiii-d., ItKi; OMteii ISackfii, Cat. Dipt. Utihital.—Went IiidU's! Bia/.il (S<'liinor). 9. Length, <>""". Front .sliiiiiii;,' violet hliick, very narrow iihovc, with Lhot't blackish pile. Antenna' brownish bhick, tliirti Joint siibtrian^u- llar. E.v«'s ninch eonveryent beh)W. l-'ac*' yeUowish white, oliseurely |li|;ickisli in tiie niichUe, and «)n the oral inarj^in; sometimes wliolly yel- jldwish white and extt'ndiii,u" np on the sidewof the front l»eh)W. Thorax LliiniiiH Itrownisli bhiek ; phMUie whitish pollinose. Ab(h)nien bare, Idcop siiinin^, somewhat metallic^ brown, only a little elongate, not reaeh- liiij; to the tip of the wings, broadest at tip of second segment, tlu'nce Lciitly n.irrowed to the tij* of tlie (Ifth sej,'inent. Vent«'r <»bscnrely jiuowiiish yellow. Lefrs blackish brown. Winjis blackish brown on the Ibasal half, hyaline on the outer i)ortion; the border of the biown extends laiToss nearly straight from before the tij) of the tirstlouyitudinal veiu to |tlii' tip of the sixth. Four spet', '6\'i. Porto Riroot'ss;it| the base of the antenine red. First two joints of the antenna^ reddisli brownish, third join', more brownish-reddish, blackish on the upper part;! arista luteous. Free in the female shining black, except a yelJDwisli pollinose stripe th.it runs from the eyes oldiipiely to the oral margin: iiil the male the siiies of the antennal procH'ss and the face below the pioj cess Jiickly covere 1 with satiny yellowish pubescence, when viowd from above, wholly concealing the ground color, and changeable in dil ferent lights, the under side of the process showing the ground colorl more distinctly. Anterior margin of the thorax white pollinose. Alt [ domen more bronze-colored, with yellow pile, longeron the sides in t'nmt, Legs black, extreme tij) of the temora, basal third of liie tibia', and liujtl three joints of the tarsi re liish-yellow ; hi?id femora in the luale ii little more thickened than in the female and with a slight protuberance below near the base. Wings sublutescent, the veins near the ti[) and posterior | margin fusoous. Two specimens. Virginia (Mr. Theo. Pergaude). • Sa^Koc, copper, aud fivta, fly. I ' 1 1 ■< SYNOPSIS OF NORTH AMERICAN SYRPHID^. 127 MYIOLEPTA.* Myoli'pta Newman, Ent. Mag., v, :{7:?, 1838. Xyloteja Kondani, Dii)t. Ital. Prodr., ii, '.Hi, 18.">7. Moderate sized, bare species, metallic,, black, or black-green; on the I abdomen an«l face, sometimes with luteous side spots. Head broad, a little flattened. Antenn.c short, sitnated npon an obtuse conical pro- jection; tirst two Joints short, third rounded or oval, with a basal, bare laristii. Face strongly concave in outline below the anteniue, projecting lielow, in the male with a tubercle near the middle. Eyes bare, contigu- I (Ills In the male; the front somewhat narrowed behind in the female. Thorax somewhat narrowed in front. Scutellum black, thinned near its l)order. Abdomen about twice as long as the thorax, and as broad or Itioader, somewhat flattened, oval or ovate. Legs stout, all the fe- mora somewhat thickened, but more especially so the hind pair. Mar- |;;iiial cell of the wings open ; third longitudinal vein nearly straight; »n- ii'iior cross-vein towards the base of the discal cell. Type of genus, .1/. luteohi Gmelin. TABLE OF SPECIES. 1 1.— Face on the sides below with a large liiteons spot ; third joint of an- tenniu ovate strigilata Face without such spot 2 |2.— Lt'<;s wholly black bella Tiii'si and tibia- more or less yellow 3 |3.— Alidonien lilack • . . nigra AUlonien with luteous or yellow si»ots at the base varipea [Myiolepta strigilata. Miliolcpla xtrigilala Loow, Centur., x, CA. Ildhifdt. — Texas, North Carolina! c?, 9. Blackish greenish, moderately shining, wholly clothed with Isiiort, rigid, ai)pres8ed white pile; antennas tibi.e, base of front tarsi, j:iii(l hind tarsi excej)! the last two Joints, red ferruginous; third Joint ji'ftlie antenna', ovate. Length of body, (> to 7""" ; of wings, 5 to (t""". IMiick-gi-eeii, moderately shining, clotlicd witii sjioit, rigid, ap[)ressed |«iiitt'])il(\ Vertex of the male black, siiining; front and tiu!e(;Iot lied very [tiiickly, with dilntely lutescent i»ollen, a bare si)ot, however, above the jiiiiteniia? ; facial tubercle and (ilieeks black and shining, lower jiart (»f [tlic luce on each side with a very large luteous sjiot. Front and face of athi' tV'iiiale black and shining, the latter on the lower half on each side rvitli an oblicpie luteous spot ; tliese spots and a bisinuate fascia situated llu'low tile antenna; wliitish or sublute.scent pollinose ; the renniinderof |tlie face not pollinose. Antennie ferruginous-red, near the base more • Mvia, tly, and AtTrra, Hue. I '\\\ Ijl (i III in Ii rK i! :,l tMl t ■'V I li % "1 .'i Ml 111 I ! li M I I 1 128 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. saturately tinged, third joiut ovate, the arista coiicolorous. Veutet cinereous, with white pollen and briefly white pilose. Femora black. the extreme tip reddisli luteous ; tibia? ferruginous red, near the base becoming more luteous, anterior ones blackish near the tip, hind ones fuscous in the middle; front tarsi black, near the base red, hind ones red, last two joints black. Wings very dilutely hitescent, but near the| tip cinereous and marked with a median fascia more i^bsoletely ciiiores. cent. Translation from the original, (!omj)ared with the type specirneusl (three) in the ^Museum of Comparative Zoology. In the single male | sijecimen the appressed pile of the dorsum has a more yellowish cast. Myiolepta bella (Plate V, tig. 2). Mjl'tolcpfa bflla Willistoii, Trans. Amer. Phil. Soc, xx, ^O'i. Habitat. — Washington Territory, Oregon! 9. Length, 7 to 8'""'. Deep black, shining. Front with very short | black i)ile above, not at all ])ollinose; face bare, not ])ollinose, iimcl produced, in profile deeply concave, below the middle briefly and geutlyl convex. First two joints of the antemiie blackish, third joint orbicu lar, reddish yellow; arista brownish luteous. Thorax faintly wliitisb ])ollinose on the anterior nuirgin ; clothed with very short black itile, longer on the border of the scutellum. Abollinose; face in the male deeply concave to a little below the miiklli'J Avhere there is a stnall but prominent mammillate tubercle, everywhere denselj white pollinose, except on the tubercle and immediately \whn it and on the cheeks, where it is shining; the lower ])art of thefaceinbotli sexes not so nnich ])r()duced as in the allied spe('es. Dorsum of tliovaxl with a bronze reflection, (ilothed with short, appressed, yellowish whitt; l)ile; on the front nuirgin, interrupted in the middle, white pollinose, Scutellum shining black, with yellowish pile. Abdomeii black j theflrsi SYNOPSIS OF NORTH AMERICAN SYRPHID^. 129 segment narrowlj^ yellowish on the sides; the second segment with a larijfe, oval, yellowisli s-pot on each side, extending rather fnrther back ill the male, and sometimes narrowly bordered on the sides behind with black; pile short, ap])ressed, nearly white. Legs black, extreme tij) of all tlie femora, basal third of all the tibia; and more or less of the tip, and the first three joints of tlie middle and hind tibifc, Inteous or yellow. Wings cinerous hyaline, toward the base yellow, in the middle in front with a large subfuscous spot ; distal part of the wings distinctly brown- ish tinged. Three female speciimens from Washington Territory and California and one male from Virginia (Pergande). Myiolepta nigra. (Plate IV, fig. 1.'). ) MtjioJepta tiigra Lomv, Centnr., x, .")'2. Ilahitat. — Pennsylvania (Lw.), New York, North Carolina! 9 . Length, 7 to 8.5""". Black, shining, wholly short white pilose. Front shining, on ea thorax, not much longer, oval, arched. Legs slender, femora not thick(;ned ; hind metatarsi long, somewhat thickened. Marginal cell of wings oi)en, third longitudinal vein gently convex anteriorly, joining the costa beyoiul the tip of the wing, anterior cross-vein toward the base of the discal cell, slightly oblique. Type of genus, R. rnstrafa Linn6, FiUrope. A well-marked genus; in the United States so far represented only by a single species, which occurs in the Atlantic States, in abundance ou low vogetation near brooks and in ineadowlands. 1'^ 0 130 f \ i> I i BULLETIN 31, UNITED STATES NATIONAL MUSEUM. Rhingia nasica. (Plate V, fig. 3, 3a.) Ithint/ia naaica Say, J. Acud., Pliil., iii, 94; Coin{>l. Wr., ii, 81; Wiedemann, AiiHS. Z\v. Ins., ii, 115, 1. Habitat. — Atlantic States, Indiana, Kentucky! $ , 9 . Length, 8""". Frontal triangle small, blackish; front in female black, lightly whitish dusted, i)ile .short, black. Anteniue yellowish- red, third Joint cordate in outline, a little larger in the female. Face red, more or less brownish on the cheeks. Thorax shining black, with two broad, whitish nollinose, dorsal stripes ; pile black, very short in the female. Scntelluni in the female wholly translucent, amber-colored, with very short pile, except a row of black bristles on the border; in the male largely blackish at the base, the i)ile long(>r, black, and with a row of black hairs on its border. Abdomen black, with two pairs of large yellow or reddish spots on the second and third segments; tlie first segment in large part obscure yellow. The black of the second and third segments oi)aque, fourth segment wholly shining greenish- black ; pile orange or yellow; the female with less, nearly bare, except on the second segment. Venter light yellow on basal p(»rtion. Legs in large i)art brownish yellow ; femora black, a ring on the tibiai,and the l)osterior metatarsi brown. Wings with a strong yellowish or brownisli tinge. Numerous specimens ; Xew England, Indiana (Coquillett), Kentucky. r'fl EUGENIAMYIA.* Eugeniami/ia WilliHtou, (Jauadii Kntoinologint, xiv, 80, 1882 ; Proo. Am. Phil. Soc, XX, 309. S . Rather large, «lark ferruginous red species, nearly bare, witli short hairs. Head narrower than the thorax. Eyes bare, contiguous. AntenniB situated below the middle of the eyes in profile, short, third Joint short and (piadrate; arista basal, plumose. Posterior orbits swol- Um. Face much produced downwards and forwards, somewhat conieal, truncate, with an obtuse, ])rominent tubercle in the middle. Thorax longer than broad ; in front and above the root of the wings, the ])()st alar (tallosities, and on the border of the scutellnm, with strong biistle.'«. Abdomen elongate, nearly twici^ the length of the thorax, of nearly e(pial width throughout, narrower than the thorax. Femora all swollen. and with short bristles below, hind femora more swollen and elongate, and the spurs stouter, tibia' with a circlet of short s]>ines at the tip, the hin. Atvmtioccra Itij^ot, IJullot. hi-muns. Soc. Ent. France, Ni>. 12, 1H82. Mediniii to larjje size, robust, .soinetiinos thickly pilos^ black, metal lie bine, browni.sh-yellow with darker abdominal fasciae, or nearly wholly yellowi.sh spt-cios. Head somewhat broader than the tliorax, tlu' posterior orbits narrow. Antenna; comparatively small, first two joints short, of nearly equal lenfrth, third joint elongate, sometiiiii's slender, often narrowed in its middle or toward the end; arista idumose, sometimes witli long and abundant ])ile, at other times shorter, spa r.sci. Face more or less excavated below the antenna', with a lu-ominence be- low the middle, at other times straight or convex in i)roflle, the epistoiii;i considerably produced downwards and .somewhat forwards, conical, pointed at the tip, with a small notch. Eyes i)ilose, sometimes baie in the female, contiauous above in the male. Thorax sometimes with yellow lateral stripes, sometimes densely ])ilo.se. Scutellum large, often tran.slucent, sometinu'S with hairs or distinct bristles on its border. Abdomen oval, strongly arched, not very much longer than the thorax. Legs simple, moderately strong, all the femora of nearly equal length. Wings large and broad, marginal cell closed, anterior cross-vein usually towards the base of the discal cell and rectangular, sometimes near the middle and oblique. Third longitudinal vein not bent into the first posterior cell, fourth vein bent inwards at the end, the third vein beyond the union directed obliquely forward; calyptrse large. The face in the female frequently differs in profile somewhat from that of the male, the depression below the antennse being a little great«n, and the lower part of the face more receding; the third joint of the antenna;, also, is sometimes more expanded, especially at the base. i'ontrary to the opiiion of some excellent dipterologists I have re- jected the genus Tewnocera, for the following reasons: In several of the species of our fauna, bristles or bristly hairs exist on the scutellinii and post-alar callos ities. In some of these, to separate them generically would be absurd, for the conformation and coloration throughout are strikingly similar to tbose of others without. Moreover, the bristles in some are so flue that they are with difficulty distinguished. Hence •Diiniuiitive from voluctr, swift. ,i ! SYNOPSIS OF NORTH AMERICAN SYRPHIDiE. 135 I think tliat this character is of but little value to distinguish our spe- cies. The otlier character used for this genus is of less value still: I mean the excision of the third joint of the anteuniB above, as such ex- cision in a less degree is found in most of the Volucelhe. Mr. IJigot has established tlie genus Ateinnocera on the presence of bristles on the scuteliiun alone, the third Joint of the antennaj not being excised above. If the suiall diUerence that is thus left as the sole character for Temno- vera were made a (niterion by which to base other genera in this family, how many would there be ? TAHLE OF SPECIES. 1.— Thorax and abdomen very thickly furry, more or less yollowish, piloai'. Face iiiiK'li excavated below the anteuiuf ; arista very loii}^ and densely idiimose : second sefjnient of the abdomen yellow on the sides; wings with a dark brown spot; large species 2 Thorax and abdomen not thickly jiilose 3 2.— l''a<'e black or chestnut ; yellow pilose; dorsum of thorax and ;)lenrii' wholly yel- low ])ilose evecta race yellow ; thickly yellow ])ilose ; ch(!eks black ; dorsum of thorax and i»leur;i> black pilose facialis 3.— I'eep l)lack,green, violet, or copi)ery colored species; cheeks not light colored . 4 I'levailing color light ; cheeks yellowish, wholly so or with a black strijie . 9 4.— iSitse of wings yellow ; face light yellow, with yellow pile; sides of thorax and the scutellum reddish or yellowish ; basal two-thirds of tibiie reddish yel- low vesiculosa, eugenia. liaso of wings not yellow but li.\alin of (lio auxiliary vein 14 Second vein irroKiilar near tliu i>nnt into the Hiibniarginal cell • • . . IS 14. — AbdornoTi reHjiltMidcnt coppery blue, tlu! banc yellow or trauBlncont, vesiciiloBa Abdomen nioHtiy yellow, browniuh toward the tip, witli three pairHof HUiall (piail- ran^^nliir spotH on the Hides aezpunctata 15. — Face ytdlow ; win^jH hyaline with brown HpotH 16 Face with a Idaek Htripo ; win^H subfasciiate 17 16. — SpotH of wiii;;H diHtinet ; black abdoniiuiil fasciii- obsolete in the middle . tau .Spots <>t° the win^H IcNH conNpicnoiis ; black alidominat t'a.scitu eoniplete. . satur 17.— Win^H distinctly f'asciate with brown; jtlenrie with two yellow spots; ytlldw lands of abdomen interrupted pusilla Win^H less distinctly faseiate; ))lenrio with tivo or six yellow spots; yellow alidoniinal bands entire fasciata For other species see descriptions. Volucella evecta. (I'late VI, lii^s (!,()«.) I Dhi'clla evvi'ia Walker, Dipt. Saunders., ii.")l. yolucflUi plumata Mac(iuart (noii Fabr.), Dipt. Exot., 4e Suppl., I'Jl. Habitat. — Mew Entilaiid, Mi(lh'urie and sciitel- luni less abundantly i)ilose in th<' miortions of the tibiic, and till the tarsi, reddish. Wings brownish-hyaline, cloude, 9. I'olucella cmiritiiH WitMU'iiiaun, Aiihh. Z \v. Iiim., ii, 197, 4 ; Sdiiiier, Novara Expert., ii, 1, 15. Dipt., :i.")t), 54. Vohicella mexicaiia Maciiiiart, Dipt. Exot., ii, 2, iJ.'j; tali. r>, lijf. 3; .Sdiinor, I. o., .">;"); Ontvn Siicivt'ii. Wi'Ht. Dipt., Xi2. I'olitcella (linjiur Muciiuart, Dipt. Exoi. Ivv Suppl., 123; tab. xi, tig. '.i; ScLiner, I.e. I'olucella mctallifera Wiilki'T, List, istc, iii, (J3C. Toliuella MaximiUnni .Jat;iinick»!, Neiie Exot. Dipt., 87 ; Schiiiir, I. c. Hahitdf. — California, Arizona, Florida !, Mexico (Macq.), New Granada (.MiU'(|.). ro- tiibcrance near the middle, below tiiis perceptibly concave, produced (lirec'tly downward into aconical tij), slightly notched at the extremity; (;l()thed with short white pile ; cheeks shining black. Antennte vary- ing from ii dark reddish to a quite black, or sometimes thti tip oidy red- dish ; third joint rather short, ex[>antled at the base ; arista moderately ])hiiiut.se. on the ui)per side longer than below. Front in female narrow ubovc, gently convex, with yellowish pile, more black at the vertex or .sdiiietiiues the pile may be wholly blackish ; on each side there is a well marked concentric groove. Eyes in both sexes obscurely yellowish ])il(ise. Thorax deep blui.sh-black, sometimes with u slight coppery lu.ster ; clothed with black ])ile, at times ob.scuiely yellowisli in front. Sciitellnm deep chestnut-black. Abdomen a deep resplendent violet or purplish, sometimes with a coppery luster, clothed with short stiff bristle like hairs and on the last two segments with black pile. Legs black, with black i)ile. Wings hyaline ; on the basal portion to a little beyond the tip of the auxiliary vein, brownish black; the end is cut off squarely and, beyond, the subcostal cell is saturate yellow, extending somewhat outwards; the dark color extemls backward to beyond the ' 1^ »' \, 138 BULLETIN 31, UNITED 8TATE8 NATIONAL MUSEUM. n i ,. X\ J I " i \ )■■ fourth voiii, cloudiii;,' tliu crosHVciuM; the outor imrt of the first Vfin ttud tlie tip of the jiuxiliary iire yeUow 8chiiier (/. a.) (ioinpiireil the type of ,)faxiiniHani .Isieii., and asserteil it to be the siiiiie as mi;r!cana, and, moreover, that hoth this and (Unpar Macq. wen^ varieties of f'«Mr*V;w Kal». Strueturaily tlH\v are all aliice. hut the color in fsnriens is more, l>ro\vnish. I have examined a large number of speitimen.s from California (()(((|uillett), Arizona (('omst(M'k), Texas, and Klori'tt like the face, with blaiik pile, sides iicailv ))arall('I; frontal triaii}j;le prominent, with l(tn;'-er black pile. AntciiiKi' brownish-black, the third Joint in the male only a little narrowed lie- yond the middle, the basal portion strarcely half as wide ajjain, in ilir female twice as wide as on its narrowest part; arista but littU' loiijitr than the Joint, loosely plumose. Eyes thickly pilose. Thorax d('t|i shininjt' blackish blue, with ratlu'r abuiulant, moderately lon^, black l)ile. Scutellum deep chestnut on its disk, with black pile. Abdoiiit'ii brilliant dark blue, with short black i)ile, louf^er on the terminal si-ii- nients. Lej^s bhu^k, black pilose. Winj^s hyaline with a small brown spot at the tij* of the auxiliary vein, faintly clouded on the outer pint and posterior border. Two specimens from Arizona (Professor Comstoek), and one from iNew Mexico (G. F. (raumer). Volucolla Anna, 11. sp. (Plate VI, iig. H.) Habitat. — Arizona ! $ . Length, 14""". Face chestnut-colored, shining bluish black on its lower part and on the cheeks, below the antennae faintlj' dusted with white; sub-antennal excavation slight, the convexity of the middle not prominent, but greater than in V. ComstocJd. Antenuie red, third Joint moderately expanded near the base. Eyes pilose with rather short ]>ile. Tlxu-ax deep shining bluish-black, with black i)ile. Scutellum chestnut- colored on its upper surface, with black pile and a row of black bristly hairs on its border. Abdomen deep blue, with a coppery refiection, clotli'Ml with short black pile, longer on the posterior segments. Legs black. Wings hyaline, costal and subcostal cells brown, nearly black at the base; a small blackish spot at the tip of the auxiliary vein, a narrow brown cloud on the furcation of the second and third ^^eins, the anterior cross-vein and cross-veins at base of discal and posterior cells. One specimen. SYNOPSIS OF NORTH AMEKICAN SYUPIIIDiE. 139 Volucella eugenla, u. Mp. (I'latc VI, (Ik. 10.) Ilahitat. — IJaliaiiiiis, Florida ! 5 . lA'iifc'th, 14""". Front and facto lij^'lit .yellow , clotht'd with lifflit vt'Ilow pile; i-lu'oks deep .sliiniiijf black. Fa(!«' coiisith'rably excavated itcldw the aiiteiiiiiu, and with a rather lar;;e protuberaniH^ near the mid- dle, iniich produ(;ed directly downwani to a very aeiiti' tip. Anteniiie yellow, third. joint a little liroadeiied at the distal end, inneh excised on irs upper border near the middle; arista a little lo-i;;er than the joint, model utely pilose. Eyes pilo.se. Dorsnm of thoi'ax olivejjreenish- liliiek, somewhat chestnut or even yellowish on the sides; (rlothed with siioit. ratli.M" sparse, pile, in term in<,ded with yellowish on the humeri; ;il(»iij,' the dorsoplenral suture with short bristles, lonj^er and more iiliiiiHlant on tlu ^tost-alar (lallosities. Scntellnm black at the base, be- coininj;' reddish on its border, yellowish below; alon;;' the bordiT theie is 11 row of l)lack bristh's. Abcionien brilliant violet, clothed with abun- dant, short black pile. Lej-s black; all the tibia', except the terminal fourtli or third on the hind pair, yellowish red. Win;4s hyalitu', cross- veins narrowly clouded with brown, tlio auxiliary vein and nearly all tiie lirst, the second, third, and fourth to near the crossvi'ins, conspicu- (lusly yellowish, the interveninj^' (M'IIs tinned with the sanu' color. Two spfcini'n.s. Is nearest allied to 1'. ubdominaliN Wied., but will be (listin^-iiished by the lateral niar<>ins of the thoracic dorsum, ami the seutellnm, not beinj^ so distinctly yellow; it also lacks the large trian- j;iiliu' u'llow spot in front of the scutellum. Volucella avida. (VhiW- VI, tig. 12.) I'oluct'lla iividd O.steii Sackeii, West. Dipr., X]',l. Uubitat. — California ! (? , 9 . Length, 10 to 12"'"'. Antenuaj light brown; arista loosely plumose above; third antennal Joint about one-half or two-thirds of the length of the arista, its basal half a little exi)anded; face pale wliitisliyellow, a narrow black stripe runs from the mouth u|)ward, be- coming paler and finally obsolete before reaching the autenme ; cheeks blaek, shining; frontal triangle of the male whitish yellow, be.set with black pile; profile straight, in the male with a slight depression under the anteinne, more receding on the lower i)art in the female. Thorax greenish-black; on each side between the humerus and scutellum a latliei- broad, dull, yellow^ stripe; in front of the scutellum a yellowish, lather obscure parallelogram, niarginate anteriorly ; sides of the dorsum and i)leura^ beset with yellowish-white hairs. Scutellum yellowish, sub- translucent, beset with black hairs along the edge. Abdomen pale lioiiey yellow; first segment black, the second and third segments pos- teriorly with a narrow black margin, expanded on each side along the lateral margin, and prolonged in the middle in the shape of a longitu- dinal black stripe toward the anterior margin ; on the second segment tbis stripe is broadly expanded so as to coalesce with the black of the I 140 BULLETIN 31, UNiTED STATES NATIONAL MUSEUM. first segment ; on the third seffnicut, on the eontrary, it is taperiiifj an- teriorly; fourth segment with a bhick crossband a little beyond the middle, with a subtriangular expansion in the middle reaching toward the fifth segment; tiftli segment black on the sides, iji the liiale the liy jM)])yginm black; the abdomen is clothed with short black i)ile on its bhu'k portions and with yellowish pile on the yellow regions, especially on the sides of the second segment and on the posterior part. Femora black ; knees and basal half of the tibia; brownish-yellow, tarsi black, Wings hyaline; latter half of the costal cell and the interval betwoeii the auxiliary and lirst longitudinal vein as far as the stigma brownish; I stignni dark brown, central cross- veins and small cross-veins with \vell| defined brown clouds ; the second vein ends in the first some little dis tance before the tip of the latter. Five specimens. Volucella isabellina, n. Hp. Ilahitat. — xVrizona ! 9. Length, 15 to IG"'". Face pale whitish-yellow, with a narrow brown stripe on the lower two-thirds, paler and obsolete above; pileia the middle black, on the sides mixed with white; cheeks with a ratlier narrow brownish-black stripe running from the eye to the tij) ; bcliind with a fringe of white pile. Front of the sajne color as the face with side grooves and clothed with black ])ile. Front gently and eveidy (;on vex; lace lightly concave below the antennie, receding on its intcrioi ImII'. Antennie brownish, or reddish ; rather short, the third Joint somewhat longer than iti arida, expanded on its basal portion. Tiioras greenish-black ; on each side between th»' humerus and scutellum a rather broad dull honey -yellow strii)e ; in front of the scutellum a yellowisli, rather obscure, i)arallelogTam ; the black is thickly dusted, leaving sloii d«'r strii)es atid the narrow borders shining blackish ; sides of the dor sum and the pleur;e beset with th» yellowish-white i)ile on the post-alar callosities mingled with black hair. Scutellum yellowish, subtranslii cent, beset with black pile on its disk and edge. Abdomen light vel low ; first segment black, second segment posteriorly with a rather iiar row black nii'.rgiu, obsolete in the middle, expanded somewhat toward the sides, in front with a narrow black triangle leaching to about tlit middle of the segment ; chird ;-egment with the anteiior margin li^lii yellow, more or less red on the middh^ part, a deep black on the [tosti rior ])ortion, which on t!ie sides reaches to near the middle of the sog ment ; this black bonier is a little wider ♦•r.m that on the [)receding scj; nieiit and like that interrui)ted, or obsoU-te in the middle: fourth sw ment with a black sjiot < .. each side on it p((sterior margin; on the an terior angles of each segment tliere is light yidlow pih', elsewhere witt short black hairs. Femora black at the base, on the other |)art, and tbi basal ])ortilit yt rather nai lat towanl about tlit^ vrfi'iii li;:lii the post' of tiie sc|; L-ediiij; ■'•■»'!; bintli sea on the iui vlu'iv witk rt, and tbt luiiial iKir! atter blact SYNOPSIS OF NORTH AMERICAN SYRPIIID^. 141 at the tip. Wings i)ure hyaline ; stiguiayello\vish-bro\Mi ; the anterior ci'oss-vciii, furcation of second and third lonjiitudinal veins, and veins at base of discal and last jiosterior cells narrowly clouded with deep brown. Tills species resembles Y. avida, \m^ differs in the jj^reater size, in the checks not bein.y wholly black, in the bhu-k of the abdoiiicu beiii}/' obso- lete in the iiii; t.ili. iv, licj. :>. Habitat. — reiinsylvania, Cvjiinecticut, Maryland, Kentucky, Florida!, Smith America. ?,9. Length, !) to 10""". Head reddish-yellow; eyes o*' male con- tiguous for a long distance, Ihe frontal triangle very smali. Antcnme icdilishyi'llow, tliinl joint long, a little broader at its iiase, but not excised en either border; arista about twice the length of joint, long |iliunose above, short bebsw Face considerably *'Xcavat(Ml l)elow the aiitcnmr. vvith a rounded ])r()tubt>raiice, distinctly concave immediately below; ])il., *,f ^'ace short, rather sparse, white. Dorsum of t'lorax bril- liant purple-colored, with a colmlt blue rellectioii, tlic front !)order. hu- ^iiit'ii, and sometimes the sides, yellow. Scutelliim more yellowish, cxci'pt oil the (b>rsuin, where it is more or less brilliant, like the tho- r.icii' iIo.se, face |niiM(l(.iably produced, shining, below the anteniiic lightly i).)lliiiose, |)i'ntuberance large, obtuse: pile short, whitish. Pectus black, ov with Imv black spots. Dorsum of thorax more reddish or brownish above. »it I ! I\ / ■<'! I ■ I'M ■■H Ml 11 ( j I' ,.l !l i! 'I t 1 1 i I, m 142 BULLETIN 31, UNITED STATES MATIOJfAL MUSEUM. clotlied with short white pile; on the sides and border of scntelhim with rather long yellowish wliite bristles; the scntellum itself more yel- lowish triinslucent. Abdomen nearly bare; yellow translncent, or even snbtransparent at the base, towards the tip often brownish, perhaiw more or less the resnlt of drying; the i)osterior margins of sccioud, third, and fonrtli segments each with a rather small, (pnidrangular blaok spot, on cither side m^ar the lateral niiirgin; on the seeoiul and tliird segments they are broader tlian long, and often joined by a postciidr brown fascia; the second and tiiiid segments sometimes in the middK' behind with a distinct black spot; pile very short, near the postciidr margins of thc^ segments black, elsewhere ])allid. Legs yellow, tip df anterior tibise and tip of all the tarsi blackisli. Wings (piite hyaline; a small browr.isli spot near the ti]> oi" anxiliary vein; the third vein reaches the costa near tip of wing, the second vein Joins the lir-il very near its end, sometimes beyond it. so that the marginal cell is open. Four si)ecimens, comi)are(l with the tyi)es at Canib age. Volucella situr. (ri;itc VI. li^s. n. i-j /,,) Volmclhi miliir Osttii f^nckcii, Wcsf. Dipt., '.'.X\. Hahit(iL—Ki\usi\s, Colorado! TJtali (O. S.). S ,9 . Length, *.> to 10""". Antenna' light brown, arista reddi.sli, loosely plumose, third Joint nearly as long as the arista, very narrow in the male, a little broader and more expanded m the female. Face yellow, a black strii)e runs obliquely from the lower corner of the eyi' to the anterior oral nnirgin; behind it the cheeks are narrow; protilc of the face nearly straight in the male, in the t'emiilc a little receding' on the lower part, the depr'vssion i)elow the antenna' is very slij^lir, Frontal triangle of the male yellow, l)eset witi" black i)ile, the verte.\ black; in the female the front is broad, of a greenish tinge, as if under- lying the yellow; a slender median yellow line runs I'rom the anfeiiiKc towards the yellow vertex; the ocelli an^ on a cordiform black spot, Eyes i)ilose. Thorax blackish-green ; on eaeli side bcitween humerus ami scutellum a rather broad, dull, honey -yellow stripe, with a short black streak in the middle; in front of the scntellum a yellowish, rathei' ob scare parallelogram, emarginate anteriorly ; pleura' wirlia large yellow spot, beset with yellow i)ile, Scutellum yellow, with l)lack hairs on tla' edge. Abdouu'ii honey-yellowish ; iiist segment black, second and third with a nairow black hind border: the black bordei'of the second segment is connected with the l)lack of the tirst segnu'Ut by a black longitudinal stripe, which is narrow in the female, broad and triaiiuu- larly expanded anteriorly in the male; fourth segnuMit '..ith a broad black hind border; fifth segment black. Femora black; knees ami two-thirds of the tibiae brownish-yellow, the last third black, or, on the intermediate pair, brownish ; tarsi reddish at base, brownish or black at tip. AViiigs grayish-hyaline; stigma yellowish, with a small pale- brown cloud; cross- veins at the base of lirst and last posterior cells, and SYNOPSIS OF NORTH AMERICAN SYRPIIID^. 143 (if the (liscal cell, and the origin of the third vein, with small indistinct luowishclonds; there are still .smaller, almost imperceptible (ilouds at tilt' tip of the second vein, near the junction with the first, and on the curvature of the vein closing the first posterior <-ell ; the latter section (if vein is more ronnded here than in pmilla and fasciata; the marginal irll is not quite so much e.\])an(led at its end ; ai-ierior cross a little be- loR- the middle of the discal cell. Three specimens, Western Kansas and Colorado. Volucella tau. (Plat.? VI, liy. i:?.) Volmclln tail Hij;(>t, AuiiiilcH Sor. Eiit. (!«• France. l^KJ, h4. JIahitat. — California !, ^Mexico (liigot). ?,9. Length, 9 to 10""". Two male and one female .specimens from California, which agree with Mr. liigot's descriptictii of a male from Mexico, are very closely allied to V. Hfttiii\ yet aie ai>pnreiitly ditferent. In ;ill three specimens tlie spots on the wings are very distinct dark Inowii, tliough small; the antenna' are distinctly longer and more sUmi- ilor (si'C figure). Mr. Cotpiillett, to whom I am iiid<'l»Ied lor tiie priv- ilejie of examining the spc^cimens, has also compared a number more witii drawings of the antennae of botli species wliich I sent him, and liiiils the ditferonce constant. Tlie female lias tiic markings of tiie ah- (Irniien nearly as in .satiir, that is witii the black cross bands iMitire; but ilic male is very distinctly diflerent. In this sex the black markings III" coiilined to the first segment, ami an iinerted T-sha)»ed spot on the second segment, the posterior black band being abbreviated a consider- iililc distance before the lateral margin. The third and fourth seg- iiiciits have only an indistinct, somewhat brownish, color behind. The hypopyojuin is black Volucella obesa. (Plato •/,(!•>•.!».) Siiri)liii,i ohtHitH I'ahiicms., Sy.sl. Hiit.,7l);{, ."> ; Kiit. Synt., iv, '.iHvi ; Syst. Aiitl., ii'^7. }'<)liici'Hii ohcHii Wii'dciiiaiiii, Anns. Zw. Ins.. ii, lUit; Macqiiart, Hist. Nat. Di])t., i, 4',M. .■>. Oniidia ithi'sd .St. l-'ari^caii auile of abdomen short, black, on the fourth and fiftli seg- ments longer, yellow. Vente', ]>ectns, and cheeks very brilWant blight green. Legs bhuik, the femorii slightly shining green ; taisi iiinni bi'ownish or reddish bhudc, the hind metatarsi thickened, and as lonjr as the remaining. joints together. Wings nearly hyaline, faintly Iikwh- ish toward the base; a small but very distinct brown spot reaches Irom the costa to the tmirth vein over the cross-vein, which is very ne;ii in the base of tlie disci (-ell; at the junction of the tirst and second veins there is a minute brov,ii sjjot ; the marginal cell atthe ti]) juts stronjily into the submarginal cell. Five specimens from San L^omingo and one trom New Mexico (E, Keen). Tlu' synonymy of V. azH>i,; Thillipi seems ])robable; the ligiiie ted yellow band, broadest on the sides; third segment on ea(5h side with a large quadrangular yellow spot, not reaching the margin and inclosing an oval black spot, soiin- times continent with the black of the margin. On the anterioi- seg- juents the i)ile is black on the black portions; elsewhere yellow; be- % SYNOP.' iS OF NORTH AMKKICAX SYHPIIID^. 145 vond the third .sctj^iiu'iit, hdi^icr, wiiilish. Li'^.s black, witli bhick pile, the fii'st iuul SL'cuiid joints ol all the tarsi yellow, the knees more or k'ss reddish. Winyswith Itrowii markings as follows: across from the oiiji'inof the third vein to the origin of the posterior basal cross-veiu, iVoin the tip of the auxiliary to the fourth. (;louding the anterior cross-vein, and from the costa beyond the auxiliavy vein to the outer posterior angle of the discal cell, sharply delined on its inner border and reaching to the tii> of the third vein, the posterior portion iufus- ciite, t!ie costal cell somewhat br(/wnish ; anterior cross-vein oblique, a little before the middle of discal cell; end of marginal cell expanded. Foiu" specimens (Professor lliley). Volucella fasciata. (I'liit(! VI, fifi;. 4.) VolitccllK J'dnciitta M;ic(|u;irl, Dipt. Exot., ii, 2,vi2, 2; pi. v. liy. 2; Osteii Sacken, W.'st. Dipt., :!:il. UahitHt. — Western Jvan.sas, Colorado, Texas, Mexico, (Jarolina ! S. 2. Mlgtl 1, 7 to S" Ivesembies piinilla (dosely, but is distin(!t. The yellow stripe of tiie cheeks is broader, the anteniiie yellow, biown- isli toward the tij), the yellow lateral stripes of the ■ i M' IMi I :■' t 'I. i 146 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. clothed with very short black pih', a litth^ loiif^er toward the tip. Legs wholly black, the tarsi on the inner side witli sliort reddish pile. Wings nearly hyaline; a black spot at the tii> of the anxiliary vein, beyond which the sti,uina is yellowisli ; the smal' cross-vein, the cross-veins ai base of dis(!al and third ])osterior cells, the last section of thb fourth vein, and the second vein near its tip with narrow bhn k clouds; second vein near its tip gently bent into the subinarjiinal cell, last section of the fourth vein stroii}>ly ben! inwards. Three t peciniens, New .Mexico (G. F. Gaumer), for which I am in- debted to Mr. Eu{>ene L. Keen, of Philadelphia. Vohicella (Temnocera) megacephala. Tvmiiorera vicf/arcphala Lorw, Ci'iitiir., iv, a?; Osten Sackcu, Cat. D^)t., 130. Habiidi. — Calilbrnia (Lw.), Arizona, Mexico! 9. Length,!.".""". Sliort, brond, Uiteous. Head very large, sordid luteous; fi'ont and face with short black i)il(' ; i»ile of the eyes very short, whitish. Occiput and cheeks dilutely luteous; face noderatoly produced, the usual tubercde nearly wantinji". Antenna; ochraeeous, very short, the third Joint moderately excised abov(\ ])orsum of tho- rax with two rather obsolete, broadly sej)arated, blackish stripes. Scn- tellum wholly luteous. Vile of the doisum niul the scTitellum, except its border, short, black, the border of the latter wtli pallid, less abun- dant pile, and without bristles. Phniric above luteous, below black. Abdomen broad, subfuscous, the baseof eatdi se.ii'ment narrowly luteous and clothed with ]iidlid ])ile. Venter dilutely luteous. i)ile very short. pallid, a black median interrupted stripe blacdc ])iIose. Coxa' and tro- chanters black ; legs ochraeeous luteous, pallidly i)ilose, ti]) of the tursi obscurely fuscous. Wings hyalijie, ajjical half of the costa l)r()a(ily margined with cinereous black; the transverse veins clouded with ;i more saturate black color. Ti'anslation from the original, compared with the type specimen in the ^Museum of Compnrative Zoology at Cambridge. Three s])ecimens, male iiiid female, ai)parently of this species, from Arizona and Mexico (J. Aqiiilera), I have since examined. The ])ilosity of the eyes is woolly, the pile of the face only in i)art black. The male eyes are contiguous for a very long distam^e, the irontal triangle small. The third joint of the antenna^ is but very slightly excised above, and the abseiu-e of bristles on the scutellum makes it seem strange thai Loew should have located the sjiecies under Temnocera. In the male specimen there is, in addition to the two rt^mote dorsal thoracic black stripes, which might better be calied spots, a median one. In only one specimen does Loew's description of the abdomen applj*; in the others the second segment is luteous, except the outer posterior parts. Tlio third segment is l)roa(lIy yellov/ in front, black behind; tl;e tbnrtti scu ment broadly yellowish and luteous, except two large, indefinite black spots behind. The species is a large one, more especially characrerizcd rtVXOPSIS or XOHTII AMKHIOAX SVRPIIIDiE. 147 by its larjje head. In all my spcciiiicns the length is somewhat pfveater tlian that given above. The apical half of tiie costa is not at all niar- giued with cinereous black, thoufjh the veins in that rejjion are narrowly blackish (;londed. Of course it is ]K>ssil)le that my deterniination is not conect, the moie so IVuiii the fact that the species belongs to a group tlie nicinbers of which are not easily distinguishable. A single specimen froui jNIexico with the i»receding (.1. A(|uilera), and icseiiiltling it, 1 have not been al)le to determine. The hciid, in struc- ture and coloration thioiigiioiit, is veiy nearly the saiiu', except that pcrliiips tile third Joint is a little iiion* excised above, a'ld there is n bi'Oiul brown strip" on the cheeks. Tlie dorsum of the thorax, except bioadly on tJie sides ;iiid hciiiiid, is shining black. The second, third, and Ibiirth segnientsof the aWdomen have a broad, indelinite, i)osterior blackish band. The legs are darker colored, towards the base of the teiuora, l)lacl;isli. Tlie wings on the outer half are almost pure hyaline; tbe base of the wings is brownish, lighter in the basal cells, and beconi- in;; (laik brown on tlie outer part of the costal cell; opposite this darker color tlie cross-\-eins are all clouded broadly with dark brown, forming' a large, (;onspicuoiis, coidescent dark-hrown s\H)t. The abdomen is less robust, and the size smaller (11.'"""). Volucella (Temnocera) Hagii. (Plutt! V. fii;. 8.) Voliirdld //((////' .lacimickc, Ncuc Exot., Dipt,, 89. Tcmiinccrd xiiiijcra Ostcii Sai'l^cn, Wc'wt. Dipt., o-U; v. d. Will]), Tijdsi'br. voor l!iit.. XXV. Habitat. — Mexico (Jaen.), New Mexico (U. S.), xVriz(ma! (5 , 2 . Jjeiigth, 14""". "' Proboscis nearly twice as long as the head, ])ointed at tlieend. Faceand front lioneyycljowisji, clotlied willt black; ]iil(', which is very short on the face and longci- on the front; the face i.s excavated below the antcmue, its lower part projecting in tlie form of a. coue, the tii) of which is bilid and slightly inliiscatt'd. Aiitcniue : lirst, two joints yellowish-brown ; ihird Joint light i»rown, excised above, so that its latter })ortion is iiuu-li narrowfr ; arista, leathery, black ; ])ro- boscisT toS""" long [a little shorter in the male], black, ])oinfed. Tlioiax. (U-nsely clothed m ith a yellowish recumbent pubescence, and, mixed. with it, short, black, erect l)ile; tiiey almost conceal the dark greenisli ground-color, as well as the obscurely visible yellowish lateral stri])e» and hirge yellowish s])ot in tVont of the scutellum ; on the sides of the thorax, several stilf black bristles; a jiair [or more] of such bristles, but .smaller, a little in front of the scutellum ; pectus blackish, fcjcutelluiu somewhat inllated, honey-yellow, beset with mixed black and yellow imbescence ; along the edge fourteen stiff black bristles. Abdomen l)n»\viijsh-yellow |or ytdlowj ; second and third segments with broad blackish jiarallel l)ori)li(jnely, although almost invisible when viewed from above; It II I I i 148 HULLETIX r\rn:i) statks national museum. hf, >; I * ir ' I that on the st'coiid sc^^int'iit Dcriipics more tliiiiiont'-tliinl [oroiicCouitir, that on the third more than one hall" [or oiH'-thinl|, ol' the leiij^th of llu. scunicnt ; st'^mcnt lonr sliows ]>os1('riorl,v m sciiucirculiir, lihick. sliin jn;^ spot, occ'iip.vinf;' thi; wliok- po.-.tcrior iiiari^hi ainl rcai.'hinj;' bcvoiul thi' middle of the segment anteriorly ; sediment live [in tlie lemah' and tile iiypopy;:iiiiii in the malej bl;i(!k. J-Vniora bhick. iuiees and anterior hull [or tliir(l[ of tlie tibia! brownish yeMow ; tlie renmiudei'of the tiltiit, as well as tlie tiirsi, iire (hirlcer [tlie tirst liiree joinis of the tarsi in tin- maleare redj. \Vin;4s urayisli iiyaline ; cross veins and lip of second vein witii sniiill l)i()\vn clonds ; sti;;inii brown. '• One specimen, Vermejo Jiivei', New IMexico, ,TniH> 25," A single mah' six'cimen from Arizona (Mr, K. Keen) .shows only uu- important dilferem^es from tiie fore^i'oinf;' description of the female by Osten Sacken, These diflferences are inchuled in the brackets. Volucella (Temnocera) pubescena. Timuoccra inihcHcrtiH I,(H'\v, Wicii. I^iit. Moiiatsclir., v, lir* ; C'liiliir.. vi, ;{.'>. Jhil)itai.—{'nhi\ (Lw,), 9, Len^itii, I'J, .■)""". IJhn-k; the head, (htrsnm of thorax, ui)por jiiiri of the ph'nras and base of the ab(h)men. hiteseeiit. antenntc sub- fnscons, winp-s cinereonshyaline, the transverse veins wlioliy. tlie aux- iiiaiy and the thii'd lonjiitndiiial veins at their tips clouded with fuscous, Head luteoiis, jiosterior orbits of the eyes white ]»ollinose. Lower ]»art; of the face stronj^iy ])roiln('e(l, acuminate, thickly clothed with veiy short blacMv pih', Antenme subfiiscoiis, ujiper mar;^iii of the third joint excised, arista black and black ])lumose. Proboscis ekniyate, black. Front on each side with an arcuate impressed line, black i)ilose, inter- mixed with sparse yellow pile. Thorax luteous: disk of the doisum with three very l)road, conllueiit, black stiipcs, very thickly coveicd with lutescent jiile, on the lateral niarjiiiisand behind sparsely jirovidcd with bla(;k bristles. Upper part of the i)leurile, on the pleurie and i)ectus black. Sciitelluni jdane, i)ur[»lisii, or i)itchy purplish, without bristles, clothed with black pile. Abdomen broad, somewliat llattened, shiniuj^', short black pilose; tenninal sej-inents of a deei) steel-blue, or a purplish steel-blue, the an- terior segments purplish. Venter deep steel-blue, sliort black i)ilose. Legs black, with short black pile; tibiae, except the tip, led, near the iiiiuiediate base infuscate. Head of the halteres white. \Vinj;s rather loui,s hyaline, with a large black si)ot, touching the middle of the costa aud including the cross-veins; veins before this spot chiedy o(;hra(!eous- ferruginous, in the spot itself and on the outer i)artof the wing fuscous black, the (;()sta itself and the first three longitudinal v< ins near the spot oi'iiraceous-)erruginous. Transhition Iron) the oi'iginal, compared with liie two type specimens ill the .Museum of Comparative Zoology at Cambridge. Volucella apicalis. I'liJiKitla apicalin I^oew, Cciitur., vi, 36. Hdhitdt. — Cuba (Loew)! ', . lA'Ugth, ().o""". Yellowish-reddish, base of the abdomen lighter, the tip more obscuri , very ol)soletely roughened. Dorsum of tliorax witli scoriaceous stripes, idtimate Joints of the tarsi blaciv, apical half of tlu' wings blackish cloudt'd. Head luteous, face n)Uchi)roduced, shining, the antenna' of tin' same color, t lie third Joint above lightly concave. Tlutrax yellowish-reddish, with four dorsal, scoriaceous stripes, pectus piceous. Abdomen yellow- isli-red, the first two segments (excci)t the hind margin of the se(!on(l) pallid, terndnal segments obsoletely subs(!oriaceous. Legs saturate lu- teous; third joint of the front tarsi black fuscous, last two Joints of all the tarsi black. Halteres while. Wings dilutely sublutescent, near the costa luteous, posterior margin clouded with cinereous, veins of the apical half broadly and indeterminately clouded with fuscous black, the clouds of the second, third, and fourth veins confluent. Description translated from the original and compared with the type ■Specimen in the ^luseum of Comparative Zoology. Volucella cliaetophora, n. sp. Uahitat. — Mexico ! i . Length, 10""". Face, yellow translucent, lightly pollinose on tho sides jd)ovc; not mucli ])roduced downward, the nearly straight lower liuider of the clieeks forming an angle of about 100^-1 10° with the plane :i( /.. \'i I .t M I ! .■ 'j ! I ■ I l.">0 nri,M:TlN 31, united STATK« NATir»\AT, MUSKUM. of the occiput; in the middle of the I'aci', with a proiniiiciit tubercle. isl)alh)\vl.v coiictivu bolow tlio fintenua;. Tiiinl Joint of tiir iiiitcniui' nut very el(*nj^ate, slender, bicuderut tbo base, not ar all tiiiar;;iiiati', .yellow; arista dennely plumooc. Frontal triangle small, hlaeU, pilo.se in the middle. Dorsum of thorax shininj,' cobalt blue, with sparse black i)ile, {Scutellnm cobalt blue, but showinp' a translucent icddisU cast; on its border with six stronjj; bristles. Abdomen biowiiisli black. shiuiii{». Lefis reddish black. Wings hyaline. 9. l''rout narrowed above, black, with light jtile. Alxlonien witlia Kubopaiiue cross-band on the posterior part of the second and lliiul segmei ts. Two speciinu'tis, Istiiiiius of Tehuantepec (National Museum, rrofcssor Kiley's collection). Vohicella, ii. sf. "' JItihifat. — Mexico ! f. ltes«Mnbles the i)receding closely, but the antenna) arc darker, there is a black facial stripe, and a similar one on the cheeks, and the face is broadly i)ollinose on the sides. The second abdominal seginciit has a broad, luteons stripe on the sides, and the third segment has a narrow, broadly interrui)ted, cross-band of the same color. The wings are broadly brown on the outer part, especially in front. One specimen, with those of the i)receding species. I 14 I i:i i,' !P ■ f r i I I'' 'I I ADDITIONAL NOUTH AMERICAN SPECIES. Volucella abdominalia Wiodoniann, Auss. Zw. Ins., ii. I'JC, 'i ; Macqimrt, Dipt. Exot,, ii, 2, 5;5, 8. — Cuba. Volucella amethystina 15if?"t, Ann. Scic. Ent. tie France, IH*.'), 479. — Mexico. Volucella aperta Walker, '"'rans. Ent. .Sdc, X. Sit., v, •2[)2. — Mexico. Volucella castanea liij^ot, Ann. Soc. Ent. de France, 1875, 47(). — Mexico. Volucella chalybescens Wiedemann, Auss. Zw., ii, 204. — Brazil; Jaonuicke, Nene Exot. Dit)t., p. 1.— Cnba. Volucella fulvicornis Bigot, Ann. Soc. Ent. do France, 1888, I8c4. — Panama. Volucella lata WiidiMnunn, An.ss. Zw.lnn., ii, 19."). — Mexico. Volucella mellea .Jaennicke, Neue Exot. Dipt., 88. — Mexico. Volucella nigrifacies Bijjot, Ann. Soc. Ent.de France, 187"), 479. — Mexico. Volucella picta Wiedemann, Ans.s. Zw. Ins., ii, 2(11 : ISiyot, in h'. de la Sagra, etc., H()2.— Hnizil (W.), Cuba (Big.). Volucella pulcliri.pe3 I)igi>t, Ann. Soc. Ent. de Fiiincc, 1^7.■), 4-0. — Mexico. Volucella postica Say, ,1. Acad. I'hi!. vi, Ititi, "J : ('cmijd. Wr., ii, '.M). — Mexico. Volucella purpurifera Bigor, Ann. Soc Ent. dc l"iaii( c, 1.-7.'). 177. — Mexico. Volucella tibialis Ma(i|ii;ut. Dipt. Esol. ler Snppi., I'j:!, 11. — Yucatan. Volucella tricincta IJiirot, Ann. Soc. ICiiI. I'rance, I^7^l, 177. — Mexico. VolucelI-:\ U'islis ISigol. Ann. Soc. lOnl. de I'lance, 1,^7.'), 4-2. — Mexico. Volucella (Temnocera) unilecta Wuiker, 'I'luns. Ent. Soc N. Si/r. v,292. — Mexico. Volucella vavians 111 i"!. Ann. Soc. I'.iit.de 1"i;itk( , li-^.'). 481. — Jlcxico. Volucella variegata iSigot, Ann. Soc, Ent. de France, 1875, 47S.— .Mexico. Volucella virklula liig'l, Ann. Soc Ent. France, 1-75. l-Jl. — Jlcxico. Volucella iTemnocera) viridula Walker. Trans. Ei\i. Soc N. Scr. v, 292. — Mexico, Volucella violacca Say, , I. Acad. I'iiil., vi, It'.O. 1; Conqd. Wi-.. ii, ^(iO. — Mexico. SYNOPSIS OF KOKTH AMKRIC'AN SYUPfllDvE. 151 CUI'ESTVUIM/ r'o/)(«/i//'/m .Mati|ii;irt, I)i|il. l'.\nt, h' Siiiipl,. l-JI, l^-ld. Wholly like some spccii's of lo/HrcZ/rf (c u.. V.fasriota, V. satur,eU'.), i'X('(»l)t in the. slriK'tiiic (»r tlic uiitciiuii'. Mndy sliort; iiIkIojikmi nlioif, hntad, oviil, fasciatc; h'ys liillu-r slt'iMJrr. I'act' itroduccd directly down- wiM'ds, obtusely coiikm! Iiclow, puintrd imd nniclicd at tiic tip. sli;;!illy mliciculato below liie middle; iVoiit arelied; aiiteiina' siliiated near iili|ier tliird of hoad in i»roflle, .slender, first Joint vei'\ -sliort, second jaiiit a little elon^^ate, tliird Joint .slcMider; arista in.serted near tlie l)a.so, luiiiicr than the Joint, thickened lliroii^hont its lenj;tli. densely pbiiiiose with siiurt, llatteued, hair-like pile, appearinj; nnder a low-power ;;Ias.s like a solid mass, under a higher pow.-r fJO-'id ilianielei's) the ari.sta shows a uradiial thickening' to near its end; ;lie pile is line neai' it.s in- scrti(tn, but tiattened beyoml. in striH'tnre not unlike elongated s<',ale8 froiii some lepidopteia. ICyes pilose, e()iiti,unoiis in male. Winj^'s as ill Voliicella, mar;^inal cell (dosed and peliolate, tip (tl t'onrlli \'ein bent ill- ward, small ci'os.s vein near middle of discal (;ell, oblicjne. Type of ge'iiis ('. iiiarffhiatiDii (Say) (). S.. >«ortli Ameiica. Copestylura marginatum. O'li't'' ^'H. liji". 1. 1", !''•) roliicclla murijiiiutn S.iy, .lour. Acail. I'liil.. vi, hiT, I!; i i>iiipl. VVi , ii, ;]60; Ost en Siir ■II, \V( v^t. Dii.t. ('oiicntjiliiin Jlariniilris N[,iciiii;irl . niiit. Kxui. Ir Siipiil., l-J.") ; ))1. x, fijr. Iti. ('oiieKtijJnm mnrijiiiiilinii Ostcii .Sackcii, Cat. Uipt.. il!(t. Ildhitat. — ^lexico (Say), Venezuela (Maccj,), Texas, Arizona, Mon- tana, Calilbrnial ^ . 9 . Length, !) to 11""". Face whitish yellow, with a black median .strip*', reachiu}? from, or near, the ba.se of the antenme to the oral mar- gin ; cheeks black, shininji', with a narrow yellow stripe rnnninjj fronj the eye to the oral mar,i;in, sometimes the yellow ])redomiiuircs, leaving only a black .stripe; antennai varyin.ij;- from alis'ht yellowish-red toquite black, se('ond Joint about one-third thelenf,'th of the third Joint. Frontal trianjile black, shininj^, or with two oblong' yellow sp(>ts near the orbit (var. lentum, natne new), ])ile usually limht -colored, soiiu'times black; front in female bhudc on the upper half, on the sides below tlie yellow of the face sometimes extends up, ])artly cut oil' by an ex])ansi()n from the black at the base of the anteiuiie: near I he middh' of the front are two small, oval sjiots, that are sometimes wanfin<:-, at other times con- tliieiil with the yellow of the sides. Thorax black, sliiiiinii', \vith wiiitish l»ile, which is longer on the ])leur;e; sides of dorsum with a stripe, en- tire or interrupted, and two spots in front of the scutellum, yellowish. Ill other specimens tlu> i)ileis longer, mixed with black, or wholly black, iiud the yellow of tiie dorsum is entirely wanting (var. Irntuni). Scutel- lum yellow, with white, bhutkish, or black pile. .Vbdomen bhndi, with * Korr//, ii .strikiiij^', and (jre/lof, a styli-. "11 !' IMAGE EVALUATION TEST TARGET (MT-S) :<$• !.0 I.I 11.25 u lit 1^ lu vg /^ '/ Photographic Sciences CorpDration 23 WEST MAIN STREET WEP'^ER, N.Y. 14580 (,I6) 872-4503 ^ ^ v [v »<>. 4^. ■^ \ I » I ■■ i| H 111 il ; I i'i' i i:)2 nULLETIN 31, UNITED STATES NATIONAL MUSEUM. tliU'i- iiiteiTupU'd bands; tlic first two pairs of spots large; tlu' third narrow, t'itlier a liglit translucent yellow or an intonsi)ieiions l>lui.>ii; in sonje specimens the yellow becomes more or less continent, so thai the dorsum is chiefly yellow; venter wholly black, with a lif-ht yt'llow median transverse band, or wliollj' yellow, exce])f the tip. Lejjs black; tibije on the jiroximal third yellowish, metatarsi and sometimes the second and third joints red ; wings hyaline; stigtiia biownish. Thirty si)ecimens (Comstock, Coquillett, Morrison). This species shows very great variation in color and markisigs. In isolated specimens one would scarcely consider the ditlerences to be less than specific, but the variations are inconstant, and «lo not seem to be of more than varietal worth. Some specinjcns agree well with Macquart's description and figure, while others ha\e still more yellow, as in Say's spe^jimens. A very dark variety in which the thorax is clothed with black pile and wholly lacking the yellow of the sides and before the scuteUum, tlie venter wholly without yellow and the anteniire black, may be distinguished as variety lentum. In nine S])ecimens from Montana (Professor Comstock) the size is dis- tinctly smaller, the facial stripe is narrower and distiiurtly separated from the black at the base of the antenna) by a yellow interval, the f''ontal triangle is yellow along the eyes and the outer part of the sec- ond vein is less sinuous. These differences are i)Ossibly specific. Copestylum limbipeniiis, ii. Hp. ILthitat. — Mexico ! 5. Length, 9""". Face black, clothed with short, white pile, witli two rather narrow yellow stiipes, convergent below. Front black, with short, white i)ile, and a small yellow spot on each side near the middle Antenn.'e brown, second joint red; third joint not twice the length "I the second, not one-half as long as tlu^ arista; arista long, black, grad ually and symmetrically widened from the base to near the tii). Eyes with short, not al)undant, white pile; in the middle with an elongate. vertical stripe of bhuik pile. Thorax shining black, .vith short, white I)ile; a small spot behind the lnimeri, a slender intraalar vittula, and two small spots in front of the scutellum, yellow ; the pleuric with a small. vertical yellow spot on the meso-plenra!. Scntellnm yellowish brown, subtranslucent. Abdomen black: an oval, obli(pie s|)()t on each side ot the second segment, toward the front, a larger semi oval spot on eacn side of the third segment in front, and the fourth segment almost wholly yellowish retl or reddish yellow; venter black, with a pair of large ov:d spots on the posterior part of the second segment. Legs deep n)aho>,'- any-black. Wings hyaline, broadly brown in front, the brown begin ning gradually from near the origin of the second vein, and tilling out uniformly the costal, subcostal, marginal, and ail of the submarginal cells, and clouding the i)i)sterior margin of the third vein, the anterior !|il SYNOPSIS OF NORVH AMERICAN SYRPHII)^. 153 dOss-vein, the distal part of the fourth vein, the posterior cross-vein, 1111(1 tin* veins at outer end of the second basal cell. \ sinyle specimen, Isthmus of Tehuautei>ec (National Museum, Pro- fessor Itiley's collection). This specimen, althouy:li I have hut the one lor comparison, otters most excellent structural diflerences from 0. marffinatum in the antenna', in the front beinj;- considerably uarrower above, and in the slender i)ilose strii»e of the eyes. The pile on the eyes i)f marginatum is black in the middle, but does not ])reseut the distinct vittulate appearance : it is also throughout much lon^fer in marginatum. Tlic broad, brown marking;' of the outer anterior i)art of the wings is conspicuously ditterent. The coloration of the body and legs is prob- ably variable. On either side of the base of the antennse there is a small, yellow spot, and the cheeks show an indication of a yellow stripe. SERICOMYIA.* Serieomya Meigeu in Illiger's Maga/.., ii, 274, IHOIJ. Large, robust, thinly pilose species, black, with yellow interrupted fascite on the abdomen. Head hemispherical, somewhat flattened. Antennie short, third joint rounded or subcjuadrate, arista feathery plumose. Face lightly excavated,or nearly straight below the antennaj, with •. slight convexity near the middle, thence concave to the oral boidci", descending moderately below the eyes, in prolile obtuse. Eyes l)are, contiguous in the male. Abdomen elongate oval, broader than the thorax, gently arched, nearly twi(!e as lo!ig as the thorax. Legs strong, hind feiriora sometimes somewhat thickened, hind tibiaj somewhat bent, at the tip sometimes with an angular i)rotuberance. Marginal cell open, rliird vein slightly, sometimes considerably, curved, anterior cross-vein a little before or near the middle of the discal cell, a little oblique. Type of genus, 8. borealis Fallen, Europe. TAr$LE OF SPECIES. 1.— Black facial stripe very broad ; bands of abdomen yellowisli white (?) . lappona Facial sirii>e moderately broad : baiidn of abdomen more yellow 2 2,— Second abdominal segment with two yellow dots, or wholly black; hind femora of male' considerably thickened militaria Second al)doniinal segment with a median, interrupted fascia 3 3.— Yellow abdominal bands broadly interrupted, the ajxits more or less donnato honr-glass shaped sexfasciata The yellow bands narrowly interrupted, the spots not constricted .... 4 4.— Fourth segment (i:i the male at least) witiiout yellow cross-band . . bifaaciata Fourth segment with cros8-l)anil like tluKse of preceding segments .... 5 5.— Abdondnal spots distinctly oblii|iie chrysotozoides Abdominal spots transverse chalcopyga * lijpiKlucella lappona O. Fabricius, Fauna Gi()(;nl.,20d, UYJ. Hahii'if. — Kiirope, Caiiadii (v. d. Wiilp.), Grt'enliUMl ? (O. Fsibr.). (?, 9. Lciiyili, 10 to 12""". Ulack. Iliuiieri white pollinose; pleura with ii tuft of .V('lh)\v pilo ; tho pile el. sew he re short, blacki.sh brown or dark reddish yellow; .scuteiliun yellowish red. The very narrow whit. ish yellow bands of the abdomen on the second, third, and fourth seg- ments, narrowly interrupted, the last usually entire. Facje black, on tb", sides broadly whitish yellow ; front black ; antennae blackish brown, the third joint somewhat lighter. Legs dark reddish yellow, front fem- ora at the base, and terminal joints of the tarsi, black. Wings at the base reddish yellow, on the anterior border grayish brownish, between the end of tho marginal cell and the first posterior cell, sometimes a brownish spot. — Translation from Schiuer, 1. c. This species is given on the authority of F. M. v. d. Wulp., who coin pared specimens collected in the vicinity of Quebec. He says : " Dat zij in Canada voorkomt, kann nu als zekerworden aangeaomen." The synonymy is given from Schiner. Sericomyla bifasciata, n. sp. Habitat. — New Hampshire! i. Length, 11'""'. Face yellow; cheeks and a broad median stripe shining black. Antennae brownish red, third joint subquadrate ; arista thinly plumose. Dorsum of thorax shining black, thinly dark pilose; on the inner side of each humerus with a spot of silvery pollen. Abdo men shining black ; pile on the sides in front yellow ; second and third segments each with a yellow cross-band, narrowly interrupted, and broadened on eacl' side; fourth segment wholly shining metallic. Fe- mora except the base, and the tip of tarsi, black ; legs elsewhere red dish yellow, the tibiae in the middle more luteous. Wings brownish in front, the base of the second vein and tlie middle eross-voins narrowly clouots ; the spots do not reach the lateral margins, and are rather broadly separated, and are most especially characterized by a constriction in the middle, especially on the front pair, where they are elongate hour-glass-shaped. Legs black ; the base and tip of all the tibi.^c, and the tarsi, except the tip, yellow; the tibiae in the middle more of a deep brown. Wings yellowish hyaline, the im- mediate base and the stigma yellow ; third A'eiu with a gentle curvature into the first posterior cell. One specimen, in the Loew type collection at Cambridge. Sericomyia iriiita'-id. (IMato VII, tigs. ;{, 3«, '.ib.) Sericomyia militariii Walker, List., etc., iii, .'/J.'). Habitat. — Hudson Bay Territory, Xova Scotia (Walk.), New York, !New Hampshire, Colorado, New Mexico, Canada!, Red River. i. Length, 15""". Face whitish yellow, shining; cheeks and broad median stripe black: pile wbitii^li ; face receding below the antennsE, then vertical and straight to the protuberance. Frontal triangle black; with black pile, white i)ollinose on the sides. Antennie nearly black, tiiinl joint subcjuadrate, but little longer than wide; arista black. Orbit white duste«l and with white pile. Thorax black, shining; the dorsum more bluish, clothed with rather abundant pile, darker between the wings; humeri whitish ludlinose; on the ui)per part of the mesopleuraj, and immediately above the suture, with a tuft of whitish yellow pile, another sihaller one on the post-alar callosity. Scutelhun reddish black <»n the disk. Abdomen greenish black, somewhat shining, with black pile, whitish yellow on the lateral and i)osterior parts. Second seg- ment with two small dots, sometimes wanting; thinl segment with two very narrow, a little oblique si>ots, acute at their outer ends; the fourth with two similar, a little broader, spots, yellow ; the narrow posterior border of second, more broadly on the third, and the fourth wholly, metallic shining ; hind margin of the third segment with a fringe of i il,.l 7 ', i!' M m \ I. < 1 1 .'j )i i 156 BULLETIN 31, UNITKlJ STATHS NATIONAL MUSEUM. II ■ III whitish yellow pil«\ reinoni bhick, tlicir tip, llic (ibitu, iind first two or three Joints of tiie tarsi, leddish yellow ; terminal Jo.iits of iiU tlic tarsi black. Hind femora thieUened, their coxie with an obtuse tuber- cle. Winjjs faintly brownish, anterior basal portion luteous, outer part brownish; third vein somewhat arcuate, <*ross vein near the middle of di.scal cell. 9 . Third joint of the antenuHi a little larger; front black, with black pile, and a grayish dusted cross-band below the middle, slender in its miildle part. The abdomen is wholly light yellowish ])ilo8e; the liind coxju without a tubercle below, and the femora not thickened norcurvwl. Six specimens, White Mountains, New Hampshire, July 15 (Dr. (1. Dimmock), Oanada (.1. li. Caulfield, William Brodie), New York (Van derzee), New Miixico ((Iraumer). This species in its thickened femora, partially obsolete abdominal cross-bands, and distinctly curved third longitudinal vein, connects this genus with Arrfophila. Sericomyia chalcopyga. (Plati- VII, li^s. 2, '2a.) Scricomyiti ('lialcopuf/d Lfiew, Cfntnr., iii, 20. Ifttbitat. — Sitka (Lw.), Washington, Oregon! ^ , 9 . Length, 12 to 15""". Front in female black, whitish pollinose on the sides below. '.)(). Habitat. — Atlaiitiv- Stati\s, CiUiada. -J , 9 . Lcn^fli, 10 to IL'""". l-'acc .shining, wliitisli i)olliii()80 on the sides; ycllowi.sh wliito, with similar (toloicd i)ik'; (dietdi.s and a median . stri|)t3 (wliic'ii i.s hioadcst in its middle, and scarcely reaches the an- teiinie), black ; in ]>r()tile coiisidc^-ahly coiicave below the antenna). An- tenna) bla«!k; third joint abont twice as lonj>- as broa, 'm, '>!>.) ArctophUa Jlugranii 0*%i'\\ cjuckon, bull, liiitl. ISoc. Nat. Soi., ili, Gt); West. Dipt,, •sa:,. Habitat. — Colorado (O. 8.), New Mexico! (J. Lengtii, 13""". Face wax yellow. Cheeks black. Antennae: ba- sal joint brownish ; third joint reddish^ the plumose arista black. Tho- racic dorsum densely clotlied with yellowish hair, through which, liow- •;ver, the metallic, brownish, coppery, ground-color is apparent; pleiuaB black, in the middle with a stripe formed by yellow pile. Abdoineu with long yellow pile at the base and on tlu-! sides, with reddish hair in the middle and at the tip; between the hairs the black metallescciit ground-color is apparent. Legs black ; front tibia) beset on the inside with short golden yellow hairs; three basal joints of the four posterior tarsi brownish-red. Wings with a slight grayish tinge; a brown spot limited by the fourth longitudinal vein, the costa, the small cross-vcMii, and the origin of the third vein ; the latter vein is more deeply sinuate than in A. bombi/ormis. — Osten Sacken, 1. c. Seven male specimens from New Mexico (G. F. Gaumer, E. Keen) are suflQciently well described by the above. The species is easily recog- nizable. cross veir P Ui ERISTALIS.* JSriatalia Lutreillo, Hist. Nat. «li'.t Crust, ft Ii *., xiv, 303, 1804. Erintalinua Knndiim, Dipt. Ital. I'roilr., ii, 40, 1H.")7. Erialalomyia Koinluni, il)iish-black color, usually with morcor less yellow on the abdomen. IJead hemispherical, but little broader than the thorax. Antennae short, situated upon a slight con- vexity of the front, first two joints short, third joint oval; arista basal, bare, pubescent or loosely plumose. Facie more or less pilose and polli- no.se, but slightly excavated in protile below the antennae, straight, ob- tuse below, not produced, near the middle with a small prominence. Cheeks broad. Eyes more or less i)ilose, rarely nearly wholly bare, con- tiguous in the male, or at least only separated by a sutural space (in some exotic species separated by a distinct interval). Thorax large. Scutelium usually more or less translucent. Abdomen convex, elliptical, longer and broader than the thorax. Legs strong, the hind femora some- times considerably thickened or dilated, the hind tibiae more or loss, sometimes considerably arcuated. Marginal cell of wing closed ; third 'Eriatalis, a precious stone. SYNOPSIS OF NORTH AMERICAN SYRPHID^.. 169 longitudinal vein stronj^ly bent into the first posterior tell; anterior cross- vein near the middle of (liscal oell, oblique. 1.— SculoUuin 1)1' tliu Htiiiii) color UN tlit* thoriix, ulidonicn without li^bt markings, wLolly bhiniiifj ; eyos Itaro (ix(;t'i)t on iipixTinost part) witl> Hinall round dark spotH ; ilorHiiin of thorax in t'cnialo dlHtinctly vittato; arJHta hare, aeueus Scntolhim moro or Iohh ydlowisli or rt'ddinh ; oycs distinctly pilosp, not so Hpotti'd 2 2.— Third Hf^jrni-nt of iibdoincn wiiolly Nliinin;;, without opaque spots or bauds . 3 Third uhdoininal s(><^nirnt witli opii(|uo inarkin^s 6 3.— Tliird joint of antunnio lai'iu;", red; arista liaro, Tliinly i)iIo8e species; second segment of alxlonirn with reddish sido s]i(itH and a shining croMs-band ; wiiif^s on tli(0>asal two-tliirdN in front Ijrowii compaotus Third joint of autennai of nsiial size ; winj^s with or without brown ... 4 4. — Pile of eyes not conlincd to a vf-rtical striim ; tlie b'ack of second abdominal seg- incnt, at Ifast, in part opa(|ne 17 Pile of eyes mostly conlincd to a vertical stripe;; abdomen wholly shining; large species 5 5.-rHoney-bee like in appearance ; njoderatoly pilose ; base of tibiio yellowish, pris- terior tarsi blackish ; arista nearly l)are . . • tenaz Humble-bee like in appearance ; thorax and abdomen with thick long pile (on the dorsum of thorax sometimes blackish pilose, var. tmianontoinm) ; arista plumose, hind tarsi red flavipes 6.— Thorax with one or more disiinct light dusted bands; frout in female narrow above 7 Thorax without such transver.se bands 11 7.— Hind femora slender ; frontal triangle, aiul front below ( $ ), with black pile . 8 Plind fenmra dilated or thickened 9 8.— Arista bari> ; yellow spots of second segment touching the front border in their whole extent atrimanuB Arista hrielly pilose; the opaquo black extends nearly the whole width of the front border transversua 9.— Third segment of abdomen with a shining cross-hand ; dorsum of thorax, besides the front border, with two complete light cross-bands; arista bare . 10 Thehlaciv of th(! third ahdoniinal segment wholly opaque ; dorsum of thorax with one complete cross-band along the suture; i'ro..tal triangle thickly white pilose alblceps,^ 10. — Second abdominal segment broadly opaqm* black in the middle; lower piirt of front not wholly white pilose albiceps$ Second abdominal •.egment narrowly black in the middle; pile of lower part of the front, or the frontal triangle, wholly white vlnetorum 11.— Thickly pilose species 19 Moderately pilose species 12 12.— Third abdominal segment with a posterior velvety black cross-hand not inter- rupted in the middle 13 Third abdominal segment with an interrupted band, or none 16 13.— Third segment of abdomen broadly and conspicuously yellow on the sides, join- ing the yellow of the second segment, the black of the second segment wh(dly opaque, not extend. ng outwards on the sides behind ; the third seg- ment with an opaque spot in front, and an abbreviated cross-band heliind ; fourth segment metallic; eyes briefly contiguous in male . . . . Brousi Third segment uot conspicuously yellow, the posterior opaque fascia of second s?>gmrnit behind reaching toward the lateral margin ; eyes broadly ccmgu- ous in nnile 14 / 'f 'I' ii I '■■ ::it I 'i I M ru5 •*i- 1' if '' 160 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 14. — FiDiil of fi'iiiaht naiTiiw. iJiTp MiiiHli lilaik ; sciitrlliiiii Inil wry little liylitcr; si'coDil M';4ni('iit (if ali(l(iiii('ii will) iiiciMispiiMioiiN hIiIi' h|i of hccoiuI Koguicnt with a Ninall triaugiilar Nhiuiii;; .spd' behind; foiiith Negiuent with iiii oval Hpot in front .... dimidiatus Third He,nnii'nt with one or two Hiiiall opufiue Himlsonly, without inislerinr cnis*. band ; or wholly Hhining 17 17.— WingM c'oiiHpieuously dark eoloreil on the outer part in front ; hind leinma thickened hortorum WingN hyalines femora not thickened 18 18.— Second Nejjnient of abdomen with yellow lateral triaiiyles and a posterior, iiiiir rnpted or Hiiliinterrui)t('d velvety cross-band; jioBterior margin ofseginpnts 2-4 yellowish white with a fringe of ]ial«* golden j)ile .... latifrons Second segment, except the oljsoletu or nu^tallic side spotH, which extend the whole It'iigth of the segmcuit, velvety black; thiid usually with a velvety triangle in front, the fourth with a similar, but very siuall one; theytj. lowish while hind borders fringed less cimspicuously with light lolorrd ])ile Brouai 19. — Second, third, and fourth .segments (d' aiidomeu broadly reddish yellow on ilir sides, leaving a narrow black stripe, which is wholly opaque on thesecuml segment, and in front, at least, on the thinl sciginent ; eyes narrowly HO)iii- rateil ( J ) montamia .Second, third, and fourth segments not broadly yellow on the sides ... 20 20. — Third segment with two o|iaque circular s])ots near tlui middle of the segini'iii. pilosuB Third segment with a jiosterior oi)a(iue cross-band 21 21. — Posterior oi)a(iue cross-band of third segment narrow; fourth segment usually with a small opaipio spot in front . occldentalis I'ostorior cross-baud broad ; fourth segment who'ly shining ; more thickly pil(i»e species Bastardl For other .si)ecies, see descriptions. Sristalis tenax. (Plate VII, figs. 7, 7a, Ih, Ho.) Muaoa tenax Linud, Fauna Suecica, 1799 (1761). Mu8ca porcina Dcgeer, lus., vi, 45, 1. Cono/)« vuijiarw Scopoli, Eutom. Cam., 354, 9G0. Conopa fuaoHB Scopoli, 1. c, 355, 901. Elophilua tenax Lutreillu, Geu. Crust., iv, 'MA. Syrphua tenax Fabriciiis, Spec. Insect., ii, 425; id. Entom. Syst., iv, 288, 36; Fallen, Syrph., iiC, 17; Zetterstedt, Dipt. Scand., ii, 661,7; id. ibid., viii, 3113, 7. Eriatalia tenax Fabricius, Syst. Autl., 2;18, 24; Mcigeu, Syst. Beschr. iii,38.'), 4; Macquart, Hist. Nat. Dij)t., 1, "01, 21 ; Schiuor, Fauna Austr., i, 334; Burgess, Psycho. Habitat. — Europe, Asia, Airiea ( Anct.), North America, Japan ! ^ , ? . Length, 12 to 14""". Eyes with dark pile, more abundant near the middle, in the form of au elongated vertical stripe or ellii)8e, tlie mi of its lir.st never lieei asIJaroii ( (MIS lildllil have seen l^iiey's (!()] and pie.sit (•ailing thii the .specie.*' wliere the^ has been ii Eristalis aet Si/rphn Fan I Concps Erhtal 2; M Eristal Eriatal Uabita*.- Syriii. '.i!o\visli pollfii and Nimilar coloicil pile ; u Itruad liirdiau taciiil strip!' and the clict'lvs shilling' hiack; tiii> iippor part of tlu> Iront in tilt' i'ctiialc and a spot above the anfenniu in hotii sexes bhick, with blai'li pile. Antenna- browtiish bhiek ; aiista reihlish, darker at the hasp, ni'arl.v bar«'. Tliorax lilaek, but little shiniiijj;; dorsum covered w'tli yellowish poUeii and moderately abundant yellow pile. Ab, and presuimibly captured in the Wesleiii Stati's somewhere, I'pon calliii}^ this j;entleman's attention to the specimen he assured me that tilt' si»ecies had Ion;;' been familiar to him about privies as'd outhouses, where they are known to breed. It seems probable to me that thespe(;i\\s has been in this countiy for many years, but had never been recognized. Eriatalis aeneus. SyrphuH (tineiin Fiilnicnis, Knt. Syst,., iv, :?()'i,8H ; Fallon, Syrpli., '2^, -j-j; Pmizt.T, Fauna Germ., &i, 13 ; Zetterstedt, Dijit. Scaud., ii, (J(id, 14. Conopii (FHOi*.? Scoindi, Eiit. Cam., :i.'>0, liy. 9(57. Erintal'iH wiiens l<''altrieius, Syst. Ant!., "244, 57; Meif^cn, Synt., Bt'Kclir, iii, 1184, 'i; Maequart, IliHt. Nat, Dipt., i, fiOC, Ki; ScliintT, Fauna AiiHtr. Dipt,, i,33:S. Erisfalis ciiproviltatiis W'wdL'innuU, Amsh. Z\v, Ins., ii,lil0,54. Eriatalis nhicirux Harris, Ins. Injur, to Vcjit't., iird imI., (iO'J; WalkiT, List, iii, 611. Uabita*. — Europe, North America!, Al^-iers, Canary Islands, Malta, Syria. ^,9. Length 8 to 10"'"'. Dark metallic green, wholly shining. Kyea spotted with small round dots, nearly bare, very slightly pilose near the top. Face and front with grayish pile and i)ollen, u small spot on the tubercle aiul the cheeks narrowly shining. AnteuuiU brown; the third joint yellowish, often the first two joints likewise; aristii bare. Thorax and abdomen with obscure yellowish i)ile. Dorsum of the tliorax in the female with five grayishwhitc stripes, the nuddle one slender, linear. Scutelhun of the same dark metallic green. Tibiai at the base, some- i I 102 IHJI,M;TIN :tl, INJTED STATKS NATIONAL Ml'SKUM. t .I'C i; k Ml' 't ' timt's for luMirly Inilf tiM'ir l«'n;,'tli, liRlit yrllow ; inid(lk>, HometimeH all thf int'tntarsi, .v<*IIo\viMli ; tin' Iciiiorii, cxci'pt tho tip, black; distal por. tioii of tibirt? blackish brov.Mi. VViiij^N liyaliji*;. NmiHTOIlS S|MM'illlIM s. Eristalii hirtus. Hi'iHlahx hlriiis Lot-w, Ontiir., vi, (1(5; OHten .Sackuii, WcHt. Dipt., dllTi; Willis- ton. I'ri.c. Am. IMiil. Soc., l^f^•J, ai'J. h'rlntiiliti liwpornliH Tliomson, l)i|it. I'.iif?. Rcnii, 4'.W), 77. ffahitnf, — \Vji.slii!i<,'t(m, On-jjo?!, ('iilifoniia, Colonulo, Wt'slcni K;iii- huh! 5,5. Lt'iitrth, H) to l.'»""". Face black, more or less coiiccalcil he. iicatli a soinctinu'N dcii.sc ;,'rayi.sli or nMldisli pdllcii, the pile whitish. A narrow stri|»o in the iiiiddlt' and the chock.s l>ar(', shiiiiiij;. Below tlic aiitcnnal process the f.ice is nearly vertical to tlie tip »)f the tubercle. Frontal ■iafi'rle (convex, with ohscnre yellowish pilf. Myes in the main liroadly contifjuons ; in the female the front is convex ami very broad, tho Hiii;;tli, 10 to l.'V""'. Tiu!!' (U'lisoly clothed with whitish pol- III) and piU>, whtMi duiiudud the ground color soiiiewiuit reddish, in the middle with a larjje oval shining spot »)n the tubercle, and the cheeks aiNO, shining black ; in prolUe concave below the antenna', the tubercle lar^M'. Antennib black, the tliird Joint a little brownish or reddish ; arista reddish, very briefly |>ilose near the base. Front iu female fldtlit'd with yi'llowishwhitisli pollen nnd pile, leaving; a median stripe Itiown; on the upjier part u «nndl vittula in the middle, a larjier oval sjiot in'artheeyes,iind theocellii. ,.(it, blai k with black pile. Kyes pilose (in tiie u|)per part ; frontal trian;;!* not niu(!li lon;;er than the suture bctwt't'U till' male's eyes, 11 liltli' shiniii;; in the middle. Thorax with slidit, not abundant, li};ht (tolored i)ilt'; shiiMn;; jjreenish black with two (ir tlirt'«' indistinct, somewhat o|)a(|ue stripes. Scutellum yellowish; |ii!t' mostly blackish above, yellowish on the border, rieuno with more abundant yellowish pile. Abdomen sliinin^j: greenish black; the usual trian;;ular spots on the second se;;inent sometimes yellowish, usually luotallic shiinng, not (Mtntijruous in the middle, elsewhere the color is opaque velvety black with a shiidnj; metallic spot in the middle behind ; third sej,'ment with three opa(pu> siK)ts, an elonjijate one on each sid(^ bt'liind, au«l an oval median one iu front, sometimes there is a yellow- ish spot on the .sides; fourth segnicut with an oval nu'dian opaque spot ill front; hind marj>iii (»f tiie second, third, and fourth .sefjments xcl- low, sometimes iieaily obsolete ; j)ile very short, on the first se;xmt'iit loiij;or, whitish, on the opaiiuc jiortioii black, elsewhere more ,\e!lo\viNli. Li't^s black; basal portion of all the tibi;e yellowish white. Wiiij^s liyaliiK', small stiyiiiatic sjiot brown, a brownish tint often near the mid- lilc of the will};;. Fifteen sjieciineiis, Connecticut, District of Columbia (I'atton), White Mountains (Dimmock, 1417), Kansas. About the synonymy of Viler minhri and vliali/brit.s there can be no doubt, the descriptions aj^ree jterfectly, and Osten Sacken, who ex- aiiiiued the types, pronounced them to be the same. IJ. niijcr iunl in- muralis of the same author differ only in that the opacpie spots of the third abdominal segment are not mentioned ; nevertheless, the synonymy is uot doubtful. • li EriBtalis sazorum. Kristalis saxorum Wiedomann, Auss. Zw. InB.,ii, 158; Macquart, Dipt. £xot.,ii, 2, :«, 5. Eristalin pervagus Walker (Harris), List, etc., ill, 618. ffaftiVflf.— Massachusetts, Connecticut, North Carolina, Pennsylvania! Georgia. ^ , $ . Length 10 to 13?™. Resembles dimidiatun, but is at once dis- tinguishable by the third segment of the abdomen having an entire posterior, velvety cross-band, by the front in the female being narrowed above, and by the presence of a distinct brown spot on the wings. V 164 UULLETIX 31, UNITED STATES NATIONAL MUSKUM. i : % I I I'M ' r M^i: i ; I i! i\\ i! I i ii!:!' I''' 1 Face eonceak'd beneath ileusc wiiitisli or yellowish pollen and whitish pile, concave below the antennic ; a larjj;e oval spot connected with the narrow oral margin, and the cheeks, shiniuj^' black. Front in female distinctly narrowed toward the vertex, at the narrowest part only a little more than half as wide as at the base of the antennic; in well-pre- served si)e(;iniens dusted ou the sides, more li<>htly in the middle, leav- ing the vertex and just above the antennae shininfj, in the middleasleu- del' l)rown stripe and above on each side an oval black sjtot ; i)ile above blackish, below whitish. Frontal trianfjle with lonj^er yellowish i)ih'; shining' in the middle. Eyes nearly bare, the pile beinj; short and con- lined to the upper part. Autcniiic brcwnisli black, third joint some- what reddish : arista red, bvieliy pilose toward the base. Thorax a deep blue black, shining'; pile light yellowish, short, not abundant, but more so on the pleura'. ScutelluiM scarcely reddish above. Abdomen shiu- ing bluish black ; the second segment on the sides sometimes yellowish, and in the same specimens sindlar, but more faintly colored sjmts ou tlu" sides of the third segment; the shining fascia of the second segment interrui)ted in the male, entire in the female, in front narrowly, behind broadly opaque black, without a shining trianguuir spot; third seg- ment very narrowly in front, more broadly behind with entire velvety fasciaj; fourth segment with a black fascia behind; lilth segment in female and the hypopj'gium in male wlolly shining; the second, third, and foi.itli segments very narrowly yellow behind. Legs black; the base of hind femora in the female and sonu^imes so in the male, tha basal half of anterior and ])osterior tibijB, rather more than half of the middle tibitc, and the basal joints of the middle tarsi, yellow. Win^s liyaline, the immediate base, and a large spot near the middle coveiing the cross- veins, brown ; in some specimens the brown of the middle is confined to a narrow fascia across the base of the discal cell and origin of the third vein. Thirty specimens. Eristalis latifrous. Eriatalis latifrous Loevr, Centur., vi, 65. ErMalis aiipator Osten Sackeu, West. Dipt., 336 ; Willistou, Proc. Am. Phil. Soc, XX, 319. ^ Habitat. — California, Kansas, Arizona, Colorado, New Mexico, Texas! S ,9 . Length, 9 to 14"""'. Face a little concave below the auteuuffi, concealed beneath dense yellowish-white jjollen, and the pile of the same color; in the middle with a rather broad shining bare stripe; the cheeks also bare and shining black. Antennae black, third joint browu- ish-black ; arista reddish yellow, bare. Eyes pilose, contiguous in the male, the suture between them rather short (about half as long as the interval between the apex of the frontal triangle and the root of the au- tennai); front in female rather broad, the sides a little convergent id)()ve, grayish pollinose, beset with dense grayish-white pile, shining along SYNOPSIS OF NORTH AMERICAN SYRPHID-S:. 1 ().') tbe middle, especially below, the vertex darker. Thorax greenish- black, unicolorous, shiniii};, beset with yellow or yellowish pile, sonie- tiriies more orange-colored, denser on the pleune. Scutellum re«ldish- brown, translncent; second abdominal segment with a yello'v triangle of the usual sbape on each side, sometimes brownish-yellow ; an opaque black cross banyginin black. Legs black ; tip of the fenu>ra and- basal half of the til»iic yellowish-white; on the middle pair three fourths of the tibifc and tlie base of the tarsi are of a pale color. Wings hyaline ; stigma small, brown. Six specimens from California (Morrison), the male of which lacks tlie velvety lateral spots on the. third segment ; a single male from Western Kansas and a female from Topeka, Jvans. (I'openoe) ; also, seven males and three females from Colorado and live from Arizona (Professor Comsto(rk). Since writing the above I iiave found the spe- cies very abundant on the Kansas jtlaius in August. Eristalis Brousi. lu-inlalia AiKlrochin Ostcii Sackpii (not Walker), West. Di[)t.. :j:{7 ; Cat. Di])t.- noto 'i-r.), i>. UAd. Eristalis f Meiijenii (VViod.) VVillistmi, Pioc. Am. Phil. Soi;.,:U'.» U'lali'). Eristalis Jlroiisii Willintoii, ilii(l.,;V^;{ ^fcinaltO- Habitat. — Canada, New England, Washington Territory !, Utah, Alaska (O. S.). (J , $ . Length, 10 to 12""". Face black, shining, thickly clothed with yellow i)ollen and pile, leaving the tubercle, the oral margin, and the checks shining black. Frontal triangle a little shining along the mid- dle; iu the female the front reddish pollinose, more shining above the antennae. Antennie black, third joint .somewhat reddish ; arista red- dish, briefly pilose near the base. Eyes pilose, in the male contign()us for a short distance only; posterior lateral orbits white i»ollinose. Tho- rax black, shining, on the tlorsum with a coppery luster, leaving two «)|)a(]ue, lighter colored, rather broad stripes, reaching from the front to the scutellum, limited by three narrow, oi)a(pH', black stripes; jtile of dor- t 1 . ! ' 166 BULLETIN 31, UNITED STATES NATION\L MUSKl.:.! i :,( I't'i m I hlj'i I I i ., I Kiii I »' w suui li{irlit reddisli yellowisli, scarcely apparent Iroui above; pile of Uic pleunuNNhitish. Scutelluin snbtraiisluceut yellowish or reudisli on the outer part. Abdoinon in the male as follows : first segment black ; second segment orange-yellow, broadly on the sides and narrowly across on the hind border, elsewhere opaipie black ; on the posterior part the black includes nearly a third of the width of t';e segment; Die sides a[)proach each other a little towaids the front and then at nearly right angles extend outward along the anterior marj^in of the segment; the Riteral prolongations are convex on tlieir hind btn-ders and reach acutely nearly to the lateral margins ; third segment with large,, similar colored si)ots, confluent with the yellow in front, but rttunded on the internal posterit)r angles and usually not quite reaching the yli long and dense sulpbui-yt'liow pile; from above, the giouud color itppears black. Scutellum wholly .^ell()\v, densely yellow pilose. Ab- domen with abundant, long, reddish yellow j)ile ; first segment black, .s('<;ond segment bioadly siinin^ reddish yellow, in the middle opaque black, the black is broad in front, behind it ()c<;npies less than a fourth (>r the width of the segment ; third segment of the same reddisli-yellow color, shining; the nie(liaM broad black stripe, continuous with the black of the scond so^nneut, is opaque in front, shining bchiniciionsly light reddish-yellow, except their ti|), hind femora somewhat elongate, hind tibiae bent. Wings hyaline, veins luteous, in the female with a large brown spot. A very common and fine species, in appearance strikingly resembling Malhta posticafa. Thirty specimens. Eristalis compactus. (Plate VII, fig. 9.) EriataUa compavtiin Walker, List, etc., iii, 619. Eristalis airicepn Loew, Centiir., vi, 04. i^rt6*7«^— Hudson Bay Territory (Walk.), White Mountains, Canada (Lw.), Connecticut! ^ , 9 . Length, 9 to 10™". Black, shining. Face on the sides lightly covered with wl'.itish jKdlen and thin whitish ])ile. Front in female yellow jdlose below ; on the sides lightly poUinose above, clothed with black pile. AnteniiiTi red, third .joint unusually large; arista bare. Eyes wholly lightly i)ilose. Dorsum of thorax shining, with reddish pile on the sides, more obscure in the middle. Pleiine mostly black pilose; scutellum brownish red with bhudv pile, along the border the l)i]e is reddish. Second segment of the abdomen on the sides witM ihe usual triangle red, or brownish red, and, extenduig across between, a shining fascia, not interrupted in the middle, the black elsewhere deep opaque, hind border yellow ; third segment and also the fourth, except their yellow hind border, wholly shining, the posterior part of the third segment, however, less distinctly so, subopaque ; liypopygium, or fifth segment, wholly shining. Pile on the sides of the segments reddish, along the lateral margins on the front i)art of the segments whitish, and at the tip of the abdomen intermixed with light-colored pile, on the black portions short, thick, black. Venter black, shining, with long, whitish pile, the posterior margins of the segments whitish. Legs red- dish, black pilose, hind femora not thickened, basal i)art of femora and last three joints of tarsi black, the distal end of anterior and i)Osterior .'.bia; more or less brownish, the tibiiu at the base yellow. Wings hyaline, veins bhick; the anterior \)\\vt as f.ir as the cross-vein, and reaching a little into tlu^ base of the second basal cell, brown. I 170 BULLETIN 31, IJN1TP:D STATES NATIONAL MUSEUM. n A siujfle specimen, taken Juno 15 in Connecticut, apfrees quite with Loew's (le8crii)tion, c.cept that the feiuoia are ina greater degree reddish. Ici Walker's specimen that he described, the legs were wholly ferrugin. ous, except the tip of tarsi. The color of the femora is evidently variable, and I have :io doubt that the. present is, as Baron Osteu Sacken .sug. pected, Walker's species. The species will be easily recognized by the blackish marking along the fore border of the wing. Erlstalis transversus. (Plate VII, lij;. h. ) Krinfa1in iraiiHvcrmiH Wiodcnianii, Anss. Zw, Iiih., ii, 18rt, fil. Krislal'is phUadelphivna Macquart, Dipt. Exot., ii, 2, JM, (>; \A. viii, fig. 4. EriKliil'iH i>iiiniliiH Mafi|nai't, Uii)t. Exot., ii, 2, 1)7, 43. Ju'inlalin riilitiiiH ,M;ic(]iiart, Ili^it. Nat. Dipt., i, 307, 19. J'Jrixlalin ioiHilii-1 liijiot, Ann. Sdc. Eiit. Franco, 1880, 'il7. Habitat. — Atlantic States I (?,5. Length, 7 to 12""'". Eyes pilose on upper half, broadly contig- \ious in the male. Frontal triangle black, shining in the middle, polli- nose on the sides, the ])ile black ; front in female with black pile, nar- rowed above, on the lower two-thirds reddish polliuose, just above the base of the anteunai shining black, around the ocelli also somewhat pollinose, below the ocelli velvety black, extending downwards into three points, one along each eye and one in the middle. Antennae TPddish yellow, the first two joints and the upper part of the third often brownish or blackish ; arista reddish, the basal portion sparsely plumose. Face concealed on the sides beneath dense whitish jiollen and whitish i)ile, the median stripe sind cheeks shining black. Dorsum of thorax opaque black, with three grayish olivaceous transverse bauds, the first along the front border, the second just before the suture, the third midway between this and the scutellum ; pile not at all abundant, lutescent, on the pleurae more abundant, yellow. Scutellum bright yellow, ;^long its base narrowly black. Abdomen in the male as fol- lows : first segment black ; second segment with large lateral triangles, and narrow posterior border, bright yellow, elsewhere wholly opaque black, extending narrowly to the lateral margins; third segment with a large quadrilateral spot on each side in front, and posterior border, yellow, the black is opaque, except a narrow shining cross-band that cuts oft' a small opavjue spot in front; fourth segment with a small yel- low spot on each anterior angle, and a posterior yellow border, broader than on the i)receding, remainder of the segment opaque black with i,ii entire shining (iross-band before the middle of the segment; hypopyg- ium shining black. In the female the lateral .spots of the second seg- ment are smaller, the .secoiul, third, fourth, and fifth segments with a narrow yellow hind border and an entire, or subinterrupted shining cross-band on the anterior part of each .segment; on the third and fourth .segments sometimes with a small yellow spot on the sides in front. Legs variable ; usually black with the tip of femora and base of tibiJB yellow ; at other times the distal half of all the femora and the SYNOPSIS OF NORTH AMERICAN SVRPHiniE. 171 base of hind tihiii', ft'iiiniii, iiml tlu- Iiii;ji;«m' itoitioii (if tin' tarsi yellow; more rarely tlic Iroiit mid middle k'jis nniy Ix- aiiiiosr w liolly yellow ami the blaek coiiliiied to outer ]>art of liiiid femora, tip of iiiiid tibia*, aiiil tip of all the tarsi. Wiiijjfs hyaline, the basal portion a little yellowish. I have examined a larjjfe number of Kpeeimens of this speeies eolleeted mostly in New England, and believe the synonyms as {^iven to be correct. Small si)ecimens corresponding to puinihis wvre talcen late in Dctober, and, upon *irst si{?ht, certainly seemed a dilTerent species, but a further study showed the impracticability of separatinj; them from the more typical frnnNrersun. Altojjether I have examined about 75 specimens, colk'cte, 111; Wiedetuann, Au88. Zw. Ins., ii, UYA, If); Macqnart Dpt. E.xot., ii, '2, 41, IG. EriHtalii Infuwiatitu Say, J. Acad. Phil., vi, Iti,") ; Coiupl. Wr., ii, 359. Erislalia uvaruni Walker, List, etc., iii, G2'.i. Eristalis ygium shiningblack. In the female the yellow spots on the third segment are usually smaller or wanting. Pile on the opaque ])ortions black, elsewhere yellowish. In some specimens the abdomen is ferruginous on the sliining j)arts, and the opaque jmrtions of a deeper color. Legs: anterior and middle pairs yel- lovnsh or reddish, the base of femora and tip of tibite brownish, hind fem- ora considerably I! Vi ii :!;■ !'■■■ ,(■!' 172 lU.'LLETIN 31, UNITED STATES NATIONAL MUSEUM. distill IiJilf of liiiid tibia) blackish. Wings liyalinc, basal portion a little .v«jlIo\visli. Ten spocinn'iis, Florida (Professor Riley), Georgia, Cuba. Brlstalis albiceps. Krhtalin ulbwepa Matriuart, Dipt. Exot., ii, 2, T)*!, 41 ; OHtcii Sackoii, Cut. Dipt,, i:tl, iiotea-Jl. KrixlaUH seniculua Lcihw, Ceiitiir., vi, G\i. Ilabiint. — ('arolina (Macq.), Cuba (Loew), Florida, San Doniingol $ . Length, 8 to 9""". lJlaek,oi)a(|ue. Kves jnlose, contiguous in iiiiile. Face concealed beneath white i)ollen and thick pure white pile, iiioic abundant and cons]>i(;uous on the frontal triangle. Facial stripe ;iiii| che<'ks shining black. Antenna- obscurely reddish or ferruginous; iuista bare. Dorsum of thorax clothed with yeliowishwhir*' pile in front, inter mixed with blackish behi.nd ; in front (»f the suture with a conspiciiouv grayish pollinose i'ascia,and on each side with an oblique spot reacliiiij; from the root of the wing backward towai'd the scutellnm. Scuiteliiiiii yellow, base nairowly black, jtile black. First segment of abdomen l)l;i(k, outer angles yellow; sec(»nd segment light yellow, with a narrow mcdiiin opaque black stripe not (piite reaching the hind margin, a little broadci in front, where it connects with the semicircular black below the sen telluin ; third segment with an ()val reddish yellow sjiot on each side, contluent with the yellow of the i)r('cediiig segnu'nt, the hind bordei yellow, the black deep opacpu' without any shining spot or fascia; ftuuili segment with a yellow hind border, and a narrow inteirui»ted sliiiiinii lascia dilated on the sides; hypopygium shining black wilii light pile; ])ile on the opaque i)ortions black, on the yellow sjjots yellow. ]a'\:> black; hind femora dilated; knees, basjil third of front and hind tiliiii. basal half of I he intermediate tibiie, and the middle metatarsi, light yellow. the extreme base of the anterior metatarsi luteous. Wings hyaline, soiiit- times faintly clouded in the middle and outer ])arts; near the end of tlit- marginal cell there is a distinct curvature of the second vein into the submargiual cell. 9 . Differs in the jiresence of a complete grayish band on the dorsum of the thorax in front of the scutellum, in the second segment of the ab domen being broadly oj)aque black in the middle, narrower in front and extending as a fascia to the lateral margiu of the abdomen behind; the third and fourth segments have each, also, a narrow, interrupted shiniii? fascia, and the lower part of the front is not wholly white pilose. Baron Osten Sacken, after an examination of the ty])e of albiceps^ states that it looked like soncidxs of Loew. Macquart's description applies sut- ficiently closely, except the '-yeux nus," which is ])robably an error, such as he has also made in regard to other North American sjtecies of this genus. The ; lal>. xxix, fij^. 1. SjirjihuH horloniiii l''!iliii"iiis, 8yst. Kiit., Ttil, U ; Eiif. Syst.. iv, '^3(5, '2'J. EriatoliD hortonim riiluiciuH, Syst. Antl., "j:}*!, l(i ; Wiedemann, Ansa. Z»v. Ins., ii, 1(111. JIahi (((t. -Wvst l\nl\vs\ i. Iit'ii;;lli, IL'""". Aiit«-iina! oriUirayish pollino.se, .separated, or ni'arly so, troni a similarly colored spot ahnij;' the post alar callus. Pleiiiii' tiiickl white pollinose below, above with j^olden yellow pile. Sciitelhini wholly yellowish-red. Second sejiuient of abdomen on each side with a larye yellowi.sh-red trian^jle, broadly separated by opaque liliHik, which extends out narrowly nearly to tiie lateral margin behind; ]»(»s\tiior maryin yellow; i)ile behind black, elsewhere yellow. Third 8t';;inent wholly shiiunj;, with black pile, excejjt on the lateral margins; tilth .segment shining metallic, with goldei; yellow pile, posterior margin yellow, and Just before it a narrow tiansveise opaque black fascia. IIyi»o|)yginm wholly shining black, with golden-yellow j»ile. Legs yel- lowishrcd, base of four front til»ia; light yellow; hind femora consid- ciiiltly thickened, hind tibia; compressed, in front aniit opaque black, witli a slender, narrowly interrupted, inetalMir cross-band; hind mar^'ins of the seilo8iin Loinv, Ci'Utiir., vi, 70. Habitat. — Urceiiland ( Lw.) ! ^ , 9 . LengtJi, 11 to l.'i""". Black, thickly <^lothed with long yellow pile; eyes black i)ilose; anteiin{e Itlack, arista ban*; face black; thorax unicolorous,opaile, sometimes li{,diter. Heiul black, yellow jiilose ; fac" of the same color, and, excei)t the very broad median stripe, is thinly covered with y«>llowish pollen ; eyes in both sexes black jiilose, in the male contimu)us, in the female broadly sepa- rated. Antennae black, arista bare. Thorax unicolorous, opaque; pile wholly yellow. Scutellum dilutely lutescent, very thickly yellow pilose. First two segments t ' the abdomen opaque ; second on each side with a snbrotund spot, very dilutely lutescent, on the posterior margin smooth. Third segment shining, with two opaque spots, forming an abbreviated fascia. The remaining seu'ments are bronze-black, shining, except a minute triangular spot, situated near the margin of the fourth segment. Pile of the abdomen yellow, in the middle of the abdomen reddish, near the tip sometimes i)allid, on the posterior angles of the sec- ond segment, and the lateral margins of the third segment, except the angles, black. Legs black, black pilose : hind femora slender, narrow .SYNOPSIS OF NORTH AMERICAN HYRPIIIDJE. 175 hiisc of tlie tibiii' fiiscrous. Wiiifj.s pun' liyulinc, voiiis fiiHcouH-blaoky vriiis of flic disk in tliii fotniilc uloiidtMl with blackish. TninHhition from original, conipanMl with the types. BrlstaliB obsourus. F.rMaliH ob'CiiriDi I.oow, (^-iitiir., vi, (57. llt,hifat.—Mo(\ Hivor of the North (Loow)! S . LcnjAth 10 to 11""". IJron/.t'-black, sliininH:,clotlMMl with rather long, (lijiitcly Intesci'ni-ciiu'reons idle; front broad, above black pilose ; eyes pilose. A'.iU;:wa; re«ldisliterni;riiioiis, first two joints blaek ; aristn pilose; rare, except the usual stripes, yellowish red, white pollinoso and white pilose. Scutcliuni brown, black near the base. Each abuoniinal sofiiiu'iit, except the first, with a post«*rior black fascia, not einar;;inate, and with a very slender posterior yellow margin. Iie;;s hV.icAi ; tip of all, anil base of liiiid, femora, t'le basal third of front and hind tiln'a;, ndddio tibiie, except the tip, and the lirst twojoints of all the tarsi, li;;ht yel- lowish. Wings puic hyaline, veins of the disk clouded with fuscous. Similar to A\ dimidiatuH. IJronze-black, shininf;, (dothed with rather (liliiti'ly Intescent-cinereous pile. Front broad, concolorous, above black jjiiose, a median spot on the front mar^iin n'ddish, the lateru! iiiar};in.<) ill front white pollinose. Face yellowish-red or red, white ])olliiio.se and white pilose, median stripe black, rarely pitchy, oral margin and the cheeks always black. First twojoints of the antenuio black, third red or ferruginous- red, rarely obscurely fuscous ; arista pilose. Thoracic (lorsnm neither striped nor fascinte. S(tutelluin pitchy or brown, near tiic base always metallic bhuik. First segment of the alxlomen glaucous, wliiti' pilose; second segment with two velvety fasi-ia-, separated by i\ shilling fas(!ia whic/li is mu(;h dilated on the sides ; the jiostciior margin yellow. In the following segments, besides the very slender yellow hind iiiiirgiii, with a posterior opaque blairk fascia, that on the third seg?nent velvety, on the remaining segments moderately shining. Pile on che jjosterior part of each segment Idack, on the front portions in great part ciiierescent. Legs black, i)allidly i)ilose ; hind femora slender, near tho b;ise yellow; tip of all the femora, basal thiid of front and hind, and the middle tibiiiB except the tip, and the first two joints of all the tarsi, lijiflit yellow, tho vsecond joint near its tip blackish. Wings pure hyaline, the disk clouded with fuscous, stigma and immediate base fuscous. Translation from the original, compared with the type at Cambridge. Eristalis inornatus. ErixtaVis inornatus Loew, Centur., vi, 68. Eahitot—UeA River of the North (Lw.)! 9 . Length 13" "". Submetallic black, shining, clothed with rather long lutescent pile; front broad, near the ocelli black pilose, but the vortex itself with luteous pile. Eyes ])ilose. Antennre reddish-ferru- ginous, the first two joints black; arista pilose. Face, except the usual 17G niTLT.KTIN 31, ITNITF.D STATKfl NATIONAL MUSKUM. I ' Rtripc, yellow, with (lilut»'I> Iut«'.s(M'iit pile ami polh'ii. Scuttlliiin wliollv reddish. lOiich .s»';,'iin'iit of th«' iih(h»iiicii, ext-i'pt the ilrsf, witli n l>linar;{iiuite and vti v«'ty opai|n''. on the f'ulh)wini!: siil* .slijiiiii;^; postt'iior niar;,'in.s of tiic 8<'^'m« nts V4'r.v nai rowlv .vcihiw, Ii«';;.s hji'ck; «'xtit'in(' tip of the Itui ora, tli)> Uasal half of front and hind tlhia-, the iniddh* tihia* I'M-cpt tlic distal tliii'd and tlio lirst joint of tli*> niiddlc rar.si, li<;|it .V('llowi.sli. Wiiij;s hyaline, tiie veins of the di.sU hiicidly snhl'ilseoiis eloiided. Somewhat liron/e-lilaeU, shinin;;, <'lotiied with nUlu'r lon^ liitesii iit pile. Front broad, (•oneoloroiis, with thiik liiteou.s pile, near the ocelli black iiilose, on the sides anteriorly Inteons pollinose, the anterior mar ^iii above the anteiiniu reddish. Vm-.v longer than in A'. o/MCHrMwaiid tlie tubercle smaller, eoneealed beneath diliitely liitescent pollen, ;m\ clothed with tlut same colored pile, a rather siemler median stripe ;nu\ till) cheeks black. First tw(t Joints of antenmt! black, tliinl reddish ferru;.''iiioiis ; arista pilose. Thorax niiicolorous, moderately shining, wholly liiteoiis pilos*', the pile of the pleiinu, however, li;;hter eoloicd. Scntellum reddish, luteons jiilose. First abdominal sej^meiit {jiancoiis, remaining sef^ments shininy, posterior mar;; ins of the si'cond, third, aiul fourth segments narrowly yellow. On the second segment there are two velvety-black fascijc, onooii the anterior niar^^iii and attenuated on the sides, the other touchin;;' the |>osterior iiiar;;in and emar;;inate; tliinl se;;inent with similar faseiic, but the anterior one is more slender. Last two se;ji-meiits wholly sllillin^^ near their posterior iiiar;;ins a deepiT Mack. Pile of the abdomen cliietly black, on the (irst se;;mont white, oil the front half of the second se;;iiieiit and near the anterior aii;:ks of the intermediate sey:ments pallid luteseeiit, on the ultimate se;;iiKiits pallid, intermixed with black. Legs black, light yell<»w pilose, hind femora slender ; tip of the femora, front and hind tibite at their base, middle tibia3,excei)t the tip, and the tirst joint of the middle tarsi with the base of the second joint, light yellowish. Wings hyaline, veius black fuscous, near the base of the wings reddish, ii large, dilutely sub- fuscous spot ou the disk, stigma minutely black -fuscous. "The type specimen has the abdomen somewhat rubbed, so that iti8 difficult to judge correctly of the pile." — Loew. Translation from the original. The single type specimen nt Cam- bridge is in poor preservation. The species is allied to dinv^iatiis. Erlstalis oestriformis. SurphiiB oestrifonniH Walker, List, etc., iii, 573. Eristatis oeHtriformia Ostcn Sacltoii, Cat. Dipt., 131, note '227, p. 249. Habitat.— Umlmii's Bay Territory (W.ilk.). " Mas. Niger, thoracis pilis anticis nigris posticis fulvis, scutello fulvo, abdomine pilis albis nigris fulvisque fasciato, antennis piceis, pedibus nigris, alls limpidis fusco uniinaculatis. " Body black : head clothed with dull tawny hairs, shining and proiui- SYNOPHIS OF NOUTIl A.MKKKAN SYKYIIID.I':. 177 netit ill front: mouth pitcliy : Icclrrs pitchy: liristh* rcrni^iiMiiiH, downy: eyeM pitch}', tMich with » ))i'oa4l Htripcot' shoi-t hliicic liuirH: all th(^ facets very Hinall : cheHl clothed with Hhort black hairs, and on the hinder part with pale tawny hairH; Hcutchcon tawny, very thickly clothed with pale tiiwny hairs: abdomen nearly oval, broader and a little loiif^er than the t'ltc8t, clothed with white hairH at the liase, with black hairs in the mid' (lie, and with bright tawny hairs towards the tip: legs black, clothed wirli short bla(;k hair : knees pitchy : shanks and feet clothed beneath with tawny down: hiiul feet tawny: claws and toot cushions tawny : tips of claws black: wings colorless: large dark brown spot in the disk: wing ribs pitchy : veins black, ferruginous towards the bnse and along tiic tree borders : poisers ferruginous. Length of the body 7 lines ; of the wings [s]>readj 14 lines." — Walker. "SyrphuM ocHtriformiH W^ilker is a rather peculiar Kristalis, repre- soiited by a single spfccinien in the British Museum." — Osten ^acken. Eristalis parous. Knulnlin /xircnM, lii^iit. Ann. Sou. Ent. Fr., 188U, 21(). Habitat. — North America (Bigot). ^. Long. KV""'. Oculis hirtis, cbeto basi breviter villoso {E. arbus- torum simillimo). Antennis castaneis; facie nigra, utrinque cinereo ohscuro villosa; thorace nigro, dense fulvo velutino; scutello fulvo} ciilyptris testaceis; abdomine, segmento secundo, utrinque, macula lata, trigona, fulva, tertio muculis siniilliinis, sed angustioribus, cunctis anguste fulvo margiuatis; femoribus obscure castaneis, geniculis et ribiis ])allide testaceis, apice late castaneis, tarsis obscure rufls, apice imniin iufuscatis ; alis fere hyaliuis, basi, et, extrinsecus, dilute et ])allidissiine infuscatis. Resemble ii I'arbustorum. Yeux veins, chete brievement velu d, sa I)a8e. Anteunes brunatres ; face noire, ijouverte, de chaque cdt6, par lui duvet grisatre ; thorax uoiratre, couvert d'un duvet roussatre assez dense, flancs ^ poils rouss&tres ; ^cusson d'un testacd fonc6 ; cuillerons testac^s ; abdomen d'un uoir luisant, presque uu, tons les segments tiuement bord^s de fauve, base du 1*' d, poils grisatres, 2« et 3«, de cLa(|ue cdt^, avec une macule fauve, triangulaire, beaucoup ]dus ^troite sin- le 3", ventre d'un grisjaunatre; pieds d'un brun rouge^tre avec uu till duvet gris, genoux et tibias, h la base, d'un testae^ blanc&fttre (k'venant plus fouc6 vers leurs extr<5mit6s; ailes presque hyalines, neivures, base, bord externe, d'un roussatre tr^s-clair. — Bigot. ADDITIONAL NORTH AMERICAN SPECIES. Eristalis agronim Fabricius, Ent. Syst., iv, 2Hi), M7 {Siirphua); Syst. antl., 235, 18; Wicdciuaun, Auss. Zw. Iiis.,ii, 17'2, "JH.— Guiuloloupt'. Eristalis albifrons Wiedemann, Anss. Zw. Ins., ii, 1^; £oder, Stett. Ent. Zeit., ia-f5, 340.— Porto Rico. Eristalis Bellardli, Jiennicke, Neue Exot. Dipt., 92. — Mexico. Eristalis oubensia Macquiirt., Dipt. Exot., ii, 2, 42, 19.— Cuba. i In 178 BULLETIN ru, UNITED STATES NATIONAL MUSEUM. If I t! 'V : i" I i I f iA 1%, I,.:' Srlstalis diminutus Wnlker, List, etc., iii, 622.— Mexico. Bxlstalla ezpictus Walker, TrnnH. Eiit. Soc. N. Ser., v, 291.— Mexico. Bristalia familiaris Walker, Trans. Eut. Soc. N. Ser., v, 200.— Mexico. Eristalls fulvipes Bigot, Ami. Soc. Eut, do Fr., l8.-<0, 225.— Mexico. ErlstaliafurcatuB Wiedemann, Auss. Zw. Ins., ii, 176,34. — Brazil, Columbia, Yucatan, A', frmoratus Macfjuart, Dipt. Exot., ii, 2, 40, l.'j ; tab., ix, fig. 6. Bristalis guadalupenais Macquart, Dipt. Exot., ii, 2. — Guadeloupe. Eriatalis Gundlachi Loew, Centur., vi, 61.— Cuba Bfiatalis impoaitua Walker, Trantt. Ent. Soc. N. Ser., v, 28t>,— Hayti. Eriatalis lateralia Walker, Linn. Trims., xvii, .'147, 42; List, etc., iii, 622. — Brazil, Cliili, Oniiina, ^lOxi(■o, Jamaica. Eriatalis mexicanua Mac<|uart, Di))t. Exot., 2^' Suppl., .'>*.), 54.— Mexico. Eriatalia pachypoda Bigot, Ann. Soc. Ent. de Fr., IHrtO, 224. — Mexico. Eriatalis puaio Wiedoniann, Auss. Zw. Ins., ii, 192; Riidcr, Stett. Pint. Zeit., 1885. :M1.— I'ortoRico. Eristalia Sackenia liigot, Ann. 8()c. Kiit . do I'r., 18W0, 224. — Mexico. Eriatalis semicirculua Walker, Dipt, t^aund., 249. — Honduras. Eristalia Soul :.uquenaia Bigot, Ann. Soc. Ent. de Fr., 1880, 228,— Hayti. Eriatalis teataceicoruia Macciuurt, Dipt. Exot., 4" Suppl., i:$8, 62. — Mexico. Eriatalis tricolor .I.eniiicke, Nene Exot. Dipt., 92. — M«. liileyi. 1 have seen three other species from Mexico, all agreeing essentially in these eharacter.s, and I believe the genus is a well-founded one. DolioayrphuB Rileyi, n. sp. (Plate VIII, fig. 8.) Habitat. — New Mexico! (?. Length, 14 to lo""". Eyes pilose. Antenn* blackish brow u; arista thin, bare. Face concealed beneath dense pray pollen, on the sides * AoXtof, deceitful; a<>pifo^, a small winged insect. SYNOPSIS OF NORTH AMERICAN SYRPHID^. 179 more ochraceous, an elongate median spot, and the cheeks in front, shining black; in profile gently concave below the antenntc, the tubercle nose-like, frontal triangle very projecting in profile, obtusely angulated iu the middle; shining black, with biack pile; the white dust of the face extends up narrowly along the eyes. Dorsum of tiiorax opaque black, the anterior border and a narrow transverse band on the suture gray- ish-yellowish poUinose, in front of the scutelluni a broad subquadnite area shining, deep metallic blue. Pleurai thickly grayish jjollinose be- low; on the mesopU'iine with yellow i)ile, which extends up to the end of the transverse baml. Scutellum light opaque yellow with short sparse black pile; iit the base rather narrowly opaque black. Abdomen brownish blsick, opacjue, with two pairs of large quadrilateral yellow spots; the black of the second segment is a little broader in front, an, 184'2. Pteroptila Loew, Ccntur., vi, fiO, 1865. Large, robust, nearly bare species, with bright yellow markings of very short pile on thorax and abdomen. Head hemispherical, a little broader than the thorax. Eyes in male contiguous, bitr*' ; iinteniiio Hiuall, third joint oval, first two joints short. Pace nearly i)erpen(li(;u- lar, below the antc-nae n little receding, not much produced below the eyes, very slightly tuberculate. Thorax somewhat narrowed in front; scutellum broad. Abdomen moderately longer than tlu^ thorax, the ^ypop.Vt?ium large, unsymmetrical. Legs moderately stout, the hind femora considerably thickened, without spines or protuiberances below. Wings dark colored in front, clothed with microscopic ])ile ; the third vein bent deeply into the first posterior cell ; marginal cell (closed and petiolate; anterior cross-vein beyond the middle of discal cell. * Rreijov, wing, and nrMv, plnniajfc. 180 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. l:\ i-d \\-.\. TABLE OF SPECIES. 1.— Legs black ; third abdominal segment with an entire yellow cross-band, the firjt segment without yellow spots oliicta The four front legs, at least, not black ; third segment with a pair of spots, fint segment also with yellow ■ .2 2.— Terminal joints of the tarsi black ; the dorsal uutare with four distinct sp cf v'«ooTa Tarsi wholly light colored ; spots on miturecoaluscunt into an interrupted band 3 3. — Black species ; bind femora in part black ; abdomen considerably narrowed pos- teriorly crucigera Abdomen and head yellowiMu reudisb ; legs without black ; abdomen moderately narrowed posteriorly rufionu JPteroptila crucigera. (Plate VIII, tigs. 1, la, lb, Ic.) f MUesia acuta Fabricius, Syst. Autl., 189, 7 ; Wiedemann, Auss. Zw. Ins., ii, 110,8 (translutiou from Fabricius). Mileain cri>'->jera Wiedemann, Auss. Zw. Ins., ii, lO.'S, 2. Mc'dota mileniformi8 Macquart, Hist. Nat. Dipt., i, 500. Plagioccra crucigera Macquart. Dipt. Exot., ii, 2, fiO, 1 ; nl. x, fig. 7. Habitat. — Georgia, Florida, Texas! Yucatan (Macq.). 9, 24; Lchjw, Stett. Eiit. Zeit.,vi, 119, 1843. Habitat. — Greeuhiud, Lapland (Lw.) ! i,9 . Length, 11 to 12"'"'. Fact' helow the antennje lightly excavated, below only si little produ(!ed, the tubercle slight, in profile nearly per- pendicular ; the lower line of the head ioruis with the occipnt but little more than a right angle; in the middle of the face with a shining black stripe, which in well-preserved exaniple.s does not roach quite to the antennae ; elsewhere on the face, ^s also on the greater i)ortion of the front, covered with whitish-yellow, sometimes somecvhat darker, pollen; cheeks shining black. Antennte black, immediately above tlieir base with a shining black spot ; a median stripe of the front and the regioii of the vertex dark, nearly blackish ; pile of the front black, at the ver- tex yeliowisii. Thorax opaque black, the usual light colored stripes nearly whitish, the lateral ones only distinct at the humeri, behind in- distinct; the median ones very narrow, linear, very distinct, in all the specimens broken off before reaching the scutellum; the pile of the thorax is yellow, blackish onlj' on the posterior part of the dark stripes. Scutellum brownish, shining, in front with black, behind with yellow, pile. Abdomen black, opaque, only a little shining on the hind margins of the segments, successively a little broader towards the hind part; on the second segment with a large, yellow, nearly a three-cornered spot on each side, the inner angles of which are usually whitish and apj)roach each other moderatelj" near; on the third segment there is on each side a narrow, yellowish-whitish curved semi" fascia which terminates in a small yellow spot in the anterior angle of the segment, which often in the male has a greater extent ; on the fourth segment are seen the same yel- lowish-whitish semifasciie but no trace of the yellow spots; on the last segments the spots are smaller and less fasciate. The pile in front ot the hind margin of the fasciai is yellowish, from thence to the hind margin of each segment bhujkish ; on the lateral margins the yellow pile ex- tends somewhat farther back, the hind angles, however, always more or less black ])ilose. Femora black, hind pair moderately dilated ; front pair at the extreme tip brownish yellow, on the hind pair there is a trace of the same color on the under side of the tip ; tibisE black, with the base browuishyellow ; hind pair ujoderately bent and not thickened at the extremity; tarsi black througliout. Wings hyaline with a grayish- brownish tinge; stigma light brown, darker at its beginning; distal portion of sixth vein moderately strongly arcuate, its terminal portion strongly bent. Helophilus borealis. HelophiliiH horeaViH StaigtT, Kroyer's, Tidnkrift, N. R., i, :i.">9, 2.'>. Loew, Stett. Eiit. Zcit., vi, 184:?, p. 12:5. Habitat. — Greenland (Lw.) ! 5 . Length, 12 to 13™"'. Face strongly excavated in profile below the ,i 18G BULLETIN 31, LNITED STATES NATIONAL xML'SELM. y\f t; I 'I ' ii I,-'* aiittMiiiu!, below stroiiffly produced forwards, the tubercle very large; in the middle with a broad, shiniiiff black stripe, reaching to the base of the anteiirite and on the lower half oidy slightly grayish diuste*! ; elsewlK'n-, as on the greater part of the front, clothed with whitish-yellow dust; cluH'lis shining black ; the lower border of the cheeks forms with ilic plane of the occiput an obtuse angle. Antenuie black; imii.ediately above theh- base a shining black spot ; the vicinity of the ocelli black; the middle line of the front also somewhat darker ; pile of the front black ; at the vertex in moderate extent yellowish. Thorax opacjin- black, the usual stripes grayish, very narrow and indistinct, in the mid- die interrupted, the median ones obsolete behind. The pile of the thorax is yellowish throughout, without any intermixture of black. Scutellum brownish, shining, on the middle with blackish, on the bor- der with yellow pile. Abdomen black, opaque, the hJnd margins of the segments, successively wider posteriorly, moderately shining; second segment on each side with a large, yellow, three-cornered spot, tiii' inner angles of which show only a trace of whitish color, and do not approach each other very closely; third segment on each side witli ii curved, narrow, semi-fascia, not quite reaching the lateral margin, at which there is no trace of a yellow spot; fourth segment with siinilai M'hitish semi fascit"., which attain the lateral margins; on the last sejr. ment they are shorter and less distinct. The pile of the abdonien is thick, erect, noticeably longer than in the related species, of a yellow color, on the hind margin of the second segment somewhat darker, on the hind borders of the following segments in nioderate extent blackisli; on the lateral margins of the abdomen the i)ile isthnmghout yellowish, only on the posterior angle of the posterior segments is there auy black- ish pile. Femora black, the hind i)air of moderate width ; in all the ti]i is brownish-yellow, in the hind pair, however, only at the extreme tip ; tibij« black, base brownish-yellow, the hind pair but little arcujite, at their end slightly yet distinctly thickened ; varsi black throughout. Wings hyaline, somewhat grayish-brownish tinged; stigma dark brown, sharply bordered at each end. II. borealis is distinguished from E. grcenlandicvH by the more oblique profile of the face, by the greater length of the j>ile on the thorax, scu- tellum and abdomen, by the absence of black pile on the hind part of the black dorsal stripes, by the greater indistinctness and more remote •position of the median light-colored stripes, by the less dilatation of the hind femora, which in the females on the distal half on the outer side has a distinct longitudinal groove, while in H.grccnlandicus there is only a large flat impression. — Loew, 1. c, translation. Helophilus mexicanus. (Plate VIII, fig. 7.) Jlelvphiluv mcxicaniia Macqnart, Dipt. Ex(>t.,ii, "2, (>4, 6; tab. ii, fig 2; Osten Sackeii, Cat. Dipt., p. 267. Helophihiif poljjgrammiin Loew, Centnr., x, "5; OBten Sacken, Weflt. Dipt., :t38. Aaemosyrphns oculiferna Bigot, Aiinales See. Ei^t. Fr., 1883, p. JUiO. (Male.) f Asemoayrjihua nigroavutatua Bigot, ibid., p. 351. Habitat. — Washington Territory, California!, Mexico (Macq., O. S.). .'.:.:i SYNOPSIS OF NORTH AMERICAN SYRPHIDiE. 187 $ , 9 . Leiij;tli, 11 to 12""". Fa<'e with a sliort deep convexity below the auteuiia; to tip ot'tuberde, theiiee leceiliiijj in a nearly straight line to the oral margin ; median tstrii>e and eheekH bare, black and shin- ing; the siiles of the face concealed beneath dense whitish-yellowish pollen and pile. Antennje black, the arista red ' H; 1)1 ^'1 1 II I I 188 BULLETIN 31, UNITRD STATES NATIONAL MUSEUM. Helophilua latlfrons. IlelophHun latifroM Loew, Cflntnr.,iv, 73; Oaten Sacken, Wrst. Dipt.,3:)7, Habitat. — MuHsachuHottH, Connecticut, Western Kannas, Wyoming, Wushiugtoii Territory, Montana, Oregon, California!, Ked River of the North (O. S.) 3,9. Length, 13 to 15'"™. Face > ellow, tliickly covered with light yellow pollen and pile, leaving in the middle a moderately broad, shin ing, reddish-yellow Htripe, which end.s acutely a little below the anti'ii nee; the lower end at the oral margin black. Cheek black, Hhinin^;. pollino8e behind. In profile the face is moderately concave abovo, from the tubercle to the oral margin nearly perpendicular and straight ; the lower border of the cheeks forms with the plane of the occiput but lit- tle more than a right angle. The front in the male is broad above, in width fully equal to half the distance between the Toremost ocellus and the base of the untennse ; across the ocelli black, a little shining, with black pile; below "^he front ocellus the black color is concealed beueatii dense yellow pollen, and wholly yellow i)ile, a small triangle above the base of the antennae shining, reddish or brownish yellow. Scutel- lum wholly translucent yellow, on the outer part sparsely and shortly black pilose, but chiefly yellow pilose. First abdominal segment gray- ish poUinose, with a black spot near the outer part, and the sides yul low. In the male the remaining segments as follows : Secon«l segment with a broad light-yellow cross band, interrupted in the middle, leaving a broad flattened triangle in front, opaque black, connected by a median stripe with a narrow posterior shining black cross-band ; third segment with a similar yellow band, more narrowly interrupted, touching the front margin, rounded on the inner angles behind, and leaving a broader posterior shining black band ; the opaque black is confined to a semi circular or semioval spot in the middle in front, separated from a smaller one behind by two intervening, oblique, yellowish pollinose, transverse, nearly contiguous spots ; fourth segment narrowly yellow on the sides, across the middle a grayish-yellowish pollinose cross band, convex in the middle in front, broadly emarginate behind; the black shining ; the posterior margin yellowish ; hypopygium black, concealed beneath dense yellowish ])olIen. In the female the shining bla<;k cross-bands on the posterior part of the second and third segments is broader; the yellow cross-band of the third segment is narrower and more broadly separ- ated, connected in the middle or nearly so by yellowish pollen ; the black spot in front is usually not oval, but forming a more or less elongate band, attenuated on the sides, but not reaching the lateral margins ; the next segment similar to that in the male, but the yellow pollinose band narrower and more gently biconcave; fifth segment shining black, with a yellowish pollinose cross-band ; the yellow on the sides of the fourth segment in both sexes may encroach on the ground of the cross-bands, and also similarly in the fifth segment in the female. Legs yellow ; base of front and middle femora, distal end of the front tibiae SYNOPfe'IS OF NORTH AMKRICAN .SYKIMIID.K. 180 iiiul tho whole of the front tarMi, the tip of iniddlo turHi and the whole of the hiud Ieg8, except the diNtal end of the femora and the ba^e of tihiiu, black; tho extreme up of hind femora aKso bhiek. Win^'H hyaline; 8tif(nui yellowish. DorHum of thorax densely light yellow or ochra- ceoiis opaque, with three sub-opaque black stripcH, of nearly equal width throughout, tho middle one a little broader ; )>ile yellow ; ])U'une densely gray poUiuose. Twenty male and as many female specimens, collected chietly from >'e\v England, where it is the most common species. In addition, Bf- tt'cn specimens from the Rocky Mountain and Pacific regions, and twen- ty lour from Montana (Professor Comstock), do not ditt'er from the east- ern ones. Both this and the following are closely allied to H. trivitatluH, Iiyhridu8, and penduhm from Europe. HelophUus simllls. (Plato VIII, lit,'. *.'.) Uelophilug aimilia Macqtiart (iion CtirtiH), Dipt. Exot., ii, 2,04,7. 1842. Helophilua fasciatus Walker, List., etc., iii, 005. Erislalia deciaua Walker, Liot, etc., iii, (>14. UelophilHu HuaurranH Jueunicke, Neiiu Kxot. Dipt., 1)4. Habitat. — New England, Canada, Indiana, Kansas, California! 5,9. Length, 13 to 15"™. Very closely allied to H. latifronH, with which it may be readily confounded. It will, liowever, be at once distin- };iiished by the front of the male being much narrower above, not more than a third or fourth as wide as the distance from the ocelli to the base (»f the antenna), and in the female by the front being wholly black pilose; in the male the front is black pilose on the upper half; the an- teuusB are lighter colored, red, or yellowish red, except on the upper l)art of the third joint, where it is blackish ; the yellow cross-bands of the second and third abdominal segments are not as broad, and the posterior black portion is broader; ihe hind tibise are usually red, or brownish red, with the basal third yellow; the pile of the scutellnm is in larger part, sometimes almost wholly, blackish. Otherwise the species scarcely differs from latifrons. Ten specimens from Connecticut, Massachusetts, Indiana, Kansas, Canada, and a single male from California. At the time Macquart uamed the species there existed another H. similis Curtis (Brit. Ent. 429, 5), now considered a synonym of -H. pendulua, and hence need not interfere with the present. HelophUus laetuB. (Plate VIII, fig. 6.) Helophilua laetua Loew, Centur., iv, 77. Habitat. — Connecticut, New York!, Wisconsin, Illinois (O. S.). 9. Length, cS..T to 0"'". Face concave below the antenna; and then gontly convex to the oral margin, wholly yellow, grayish-yellowish i)ol- liiiose, on the lower part, in tho middle, a narrow shining spot ; cheeks black but not extending forward. Front black, thickly yellowish i)olli- nose and wholly black pilose, except on the vertex. Antenna? yellow- ish red; arista black at the tip. Dorsum of thorax opaque blac^, ! ;i :, 1 \h M 190 HULLKTLN SI, I'NITKD STATES NATIONAL MUSEUM. with four pfri«yisli-,v<'ll()wiKli slripes; the niiddlu pair not very broiid, griulually dilated on tliH liind part, the median black Htripe liaH in tli(> n)i- basal ring, and the hind tiirsi, bhuik or blackish. Wings nearly hyaline. ff . Face and lower part of front l)righter yellow ; front above, between the ])arallel orbits, black, lightly pollinose, with black pile, below on the yellow part the pile is yellow. Stripes of grayish pollen on the dorsum of the thorax narrowed, almost linear, the slender line in liie middle of the median black stripe almost indistinguishable. Pile of thorax moderately long, yellow, across the disk of tiie scutellum some- what intermixed with black. Abdomen : ftrst and second segments as in the female, except that the yellow cross-band is broader and a littl<' less widely interrupted; third segment with two large yellow sjMits, nar- rowly separated at the t';'s, leaving a slender, biarcuate cross-baml of opaque black behind, narrower than in the female, connecting at their inner ends with the triangular or semi-oval spot in front, which is less transverse than in the female; the fourth segment whol'y grayish polli- nose, except a very slender, biarcuate black cross-band, connecting in the middle with a small spot in front, hind margin yellow ; hypopy gium black, wholly pollinose. Front and middle femora more broadly black at their base; hind femora black, except narrowly at the base, and a broad, preapical ring. A single male specimen from Saratoga, N. Y., August 30, on meadow land, and a female from New Haven, which undoubtedly belongs to the same species, although the black of the femora is different in extent, and which in the male does not agree so well with Loew's description. Helopbilus cbrysostomus. (Plntc VIII, iig. 5.) ErMaliH cln-yHoaiomiin Wiedemann, Ans^;. Zw. Ins., ii, 174, 30. lUhtphihts chnjHOHlomiiH OHten Sacken. Cut. Dipt., 13;}. Habitat.— :^v\y England, New York!, Georgia (Wied). iM 1 . :^ \ SYNOPSIS OF NORTH AMERICAN SYRPIIID.F,. 191 ^ , 9 . Ij<'n^tli, 9..J to 11""". Kroiit of iiialo not broiul, fli«^ n'u\vti par- iillfl on upper lialf; on t\w Iow«m' hiilf, like the face, of a Hue lijfht ;'(»I«UMi-.velIo\v, with yellow Mihst ami pile, not at all sliiniiiK: on the upp'T half, in front of the oeelli, thickly covered with a brownish-yellow (luHt, the ocelli and vertex black, shining, and narrowly blar is shining bla(;k, obscured by the j)ollen, which is less nl>iiiulaiit and less yellow than ill the male. Antenme yellowish red; arista re!oi of the male. Dorsum of thorax light yellowish-olivaceous, with tliiee broad, black, opaque, velvety stripes, rather nairowly separated, but more broadly so in the male than in the female; the outer stripes do not reach quite to the front and ba(!k margins ; pleura* j)(>llinose. Scu- tellum shining black, the border red, pile yellowish. Abdiunen in the male slender, narrowed at hind part of the second segment, yellowish and ferruginous-red ; first segment grayisli ])()llinose, except a small [iipot near the outer sides behind, continuous with the anterior angles of the black on the next segment; second segnient broadly velvety black, extending nearly the whole width of the segment in front, thence nar- rowed so that at the mi t he base and exteiidinjj hack narrowly in the muldle to nearly the hind l)order, oi>a(iue black, [liurowed on the sides as thou|;;h by an interrni)ted cross-baiul ; in the male the lirst segment, except the sides, the second segment, except the lateral iind i)osterioi' marj^ins (on the sides in the middle and behind more broadly), and the third sej^'ment with a large triangle in front, its apex near the hind margin, and nesirly truncated by a slender iuterrui)ted cross-band, opjique black. Legs black ; the distal end of all the femora the hind femora at the tip above, however, black), and narrow base of all the tibife and a rather broad ring near middle of hind tibia?, yellow ; sometimes rings near the middle of front and middle tibia's less distinctly yellow. Wings faintly tinged with blackish. Three male and one female 8pe. (I'liitc \III, lig. ;}.) / llvhijthiUix nlquitiis WalliiT, I^ist, olc, iii, (iOiJ. .' IlilojiliilnH .tiiaiisiH WalJitT, List, i"ti'., iii, tiC;',. Ildopliiiiis rdiiKtiiH Oslfii S;ii'lr(Klm'ed downward and forwanl into a slender nearly regular coiu', i)ointed at the tip. Cheeks bla(;k, extending more narrowly along the oral margin to the tip. Dorsiitn of tiiorax o|)a<|ue black, with a broader, lateral, grayish pollinose stripe and two narrow ilors.d ones, linear in the Jnale; a little broa'ler in the female, and e.\- imiided in front of the scutelluni so as to touch each other at the tii)>. i'l(MUie thickly dusted like the dorsal stripes. Scntellnm brownish yel- low or yellowish, translucent, usually more or less black along the base: |)ile,like thatof the thorax, grayish-yellow. Abdomen black, with yellow •iiid grayish |)ollinose markings. In the nnile the tirst segment opa(pU'. ''.\cei)t the lateral margins; second segment with a large yellow spot on the sides, extending from the anterior angles nearly to the jmsterior part, inclosing the opaque in the shape of a goblet, of which the stem is short, . quare, and rectangular, the base forming a narrow complete 194 BULLETIN :h1, I'NITED STATES NATIONAL MUSEUM. ! li i' ')^ '■:y\' , ,*.<:i 111 fi cross-band; the inner ends of the yellow spots are a little whitish dusted; third segment with two large yellowish-red, subtriangular spots, the posterior margin straight, more or less indistinct, their inner end whitish pollinose, separated by about the same width as the pre- ceding, the inner anterior sides a little convex, the front ends slightlv encroaching on the second segment, the narrow hind ujargiu yellow, dusted with whitish pollen, which expands somewhat in the middle; elsewhere the black is opaque ; fourth segmeut on the front half shin. ing, on each side with a moderately broad, arcuated, pollinose s))ot, the outer end attaining the anterior-angle, posterior border yellow, and before it with a cross-band of about the same width, subopaque black ; the yellow is pollinose, encroachiu'^ somewhat on the black in the mid die. In the female the color of the abdomen is less opaque, with poUi nose markings as follows: First segment, except an oval spot on the sides ; second segment with a slender convex spot on each side near the middle, the inner end widened, expanded on the sides in a slender tri angle, the ground color of which is reddish yellow, posterior border in the middle also i)ollinose ; third and fourth segments similar, the spots not so slender, the lateral reddish yellow spots smaller, and the i)oste- rior pollinose margin broadly dilated in the middle, so that in the fourth segment it is more than a third of the width of the segment: tifth segment wholly pollinose, except narrowly at the base. Legs red dish-yellow ; a spot above on the front and middle femora, the tip of front tibiiB, an<' the distal joints of their tarsi, a large oval spot on the upijer])art of the hind femora, and the extreme tip black; a 8ub-l)asal and a i)reapical ring on the hind tibia, and the hind tarsi brown. Wings nearly hj'aliue. Although 1 have but two specimens ( ^ , 9 ), from Connecticut, yet from comparison with European specimens and also with the full description of H. liueatus given by Loew (Stett. Ent. Zeit,, vii), I am satisfied that this is not the same. The male ditters in the much larger extent of yel low on the abdomen, and the thoracic stripes being more distinct ; in the female by the greater extent of pollen on the abdomen, and espe cially by the thoracio- stripes, which are broad and distinct, a third of the width of the intervening black stripe ; they are not diffuse on the pos terior part, but are well defined quite to the scutellum ; the interveninj.' black stripe is narrowed iii a lanceolate form at the tip, merely touch ing the scutellum in an acute ])oint. In II. Uneatus, on the posterior third, the stripes are widened in a more grayish (^olor so as to leave only a slender line between them, apparent in well-preserved examples The lower part of the face is less brow uish in H. conoatomtis, and the legs have a less extent of black. I am not sure that all these differences, especially the latter ones, are constant. Should the genus Eurhimyia Bigot be deemed admissible (I do not think that it is) this species would belong in it. A single specimen without a head, of this species is in the Loew type collectioD, bearing the label " Spec, indescr." i!';/.. SYNOPSIS OF NORTH AMERICAN SYRPHIDiE. 195 HelophiluB hamatus. Helophilus hamatua Loew, Centnr., iv, 79. Habitat.- Hudson's Bay Territory (Lw.) I 2 . Length, 8.5°'"'. Face strongly produced, subconic, cheeks black, no median stripe. Antennae subochruceous. Front blackish, thinly clothed with ochraceous pollen near the antenna?, short black pilose. Dorsum of the thorax with four rather broad, ochraceous pollinose stripes, the intermediate ones cinerescent. Scutellum reddish. Abdo- men with nearly parallel sides ; first segment whitish-cinereous ; the three following segments black, oi)aque, each with two whitisli lunulate spots, the posterior margin shining ; last segment cinereous pollinose. Legs luteous-brownish ; femora with black markiiig3, hind tibiae with two fuscous rings, the front and hind tarsi wholly and the tip of the middle tarsi fuscous-black. Wings cinereous hyaline, stigmatic sj^ut snbfuscous. Translation from the original, compared with the type specimen at Cambridge. Helophilus divisus. Jlelophilus divisus Loew, Centiir., iv, 78. Habitat. — District of Columbia (Lw.)! 9. Length, 0"^'". Face less projecting than in R. obsoletus, integer, and Iwtns, the antennal arista black, the abdominal lunules narrow, the cinereous wings and the markings of the legs are all ditterent. Pile of the front black, above rather long, at the vertex luteous. Dorsum of the tliorax with very short luteous pile, that of the scutellum longer. Four br()a. '■ I., i A. .::.!- Ini;'' romaiiidor (Mitirc; (mh'Ii sefjineiit, <'\'c(>i)t tho first, with a median subtri angular spot ocliracoous poll'MOse and contiguous with the hind iiiiir- gin ; hind margin of the third segment narrow, of the fourth segment broad, luteons. Legs luteous ; front femora near the base with a l)lack spot; hind femora near the base with a minute blacjkish spot, above in large part black and near the tip on each side with a fuscous s))ot; iiind tibiic near the base with a fuscous ring, at the tij) blackish fusci us: hind tarsi wholly blackish fuscous. Translation of the original, compared with the type specimen at Cam bridge. Helophilus obscurus. Helophilun obneurii8 Loew, Centnr., iv, 74. Habitat.— Colorado (O. S.)! 9. Length, lO"""'. Black and yellow varied. Face somewhat project ing, with the cheeks and a rather broad median stripe black. I'irst two joints of the antenufe brownish-black, third joint red, more obscure on the ui)])er portion. Dorsum of thorax with four yellow strii)es, tiic interme^ with it of the same color. Legs luteous,thecolorof the hind pair darker: front femora near the base with two minute black spots, hind femora on the posterior side with a large black spot; hind tibiaj near the base with a brownish ring, and at the tip blackish ; hind tarsi wholly black, Pile of the whole body a little longer than in the female of H. integer or laetus. Translation from the original, compared with the type specimen at Cambridge. ,ll IV SYNOPSIS OF NORTH AMERICAN SYRPHID^. 197 Helophilus porcus. Kumcrus porcHu Walker, LiHt, etc., iii, 551. Habitat. — Hiidsoii'.s Bay Territory (Walker). "9. Length of tlie body 3-4 lines; of the wings [spread] 6-7 lines. yiger, thoraee einereo quadrivittato, abdomine niaculis nigris nitentibus i-anisque ornato, antennis piceis, pedibus nigris, genubus tarsisque fer- riigineis, alls .snbcinereis. -Body black, clothed with black hairs; head covered with wliite bloom, and clothed with white hairs beneath, pale yellow in front and around the base of tiie feelers; mouth black; feelers pitchy; bristle black; eyes brassy black ; all the facets small; chest adorned with four gray strii)es; breast tinged with gray; abdomen ellii)tical, deep velvet- like black, longer and a little broader than the chest; each segment adorned with a triangular, black, shining spot in the middle, and with a hoary spot on each side; hind borders shining; legs black; knees and feet ferruginous, the latter pitchy towards the tips; foot-cushions and claws tawney; tips of the claws black; hind thighs thick, unarmed; hind shanks curved; wings pale gray; wing-ribs and veins black; veins pitchy towards the base; poisers yellow." — Walker, 1. c. ••Is a very i)eculiar si)ecies; it is represented in the British Museum by two (reinier et deuxieriie se},'ment8 elarjjies ct fauves siir lejs cotes; ventre noir, a incisions blancbatres. Janibes in tcrniediaires fiiuves, a extreniite brunatre. Ailes aasez claires ; pre- miere nerviire transversale situde au-dehl de la rnoitie do la cellule dis- eoidale. ADDITIONAL NORTH AMERICAN SPECIES. HelopbiluB formalis [femoralia'] Walker, List, etc., iii, fiO;?. — Mexico. IJelopliiliiH AndrocluH Oaten Sackeii, Cat. Dipt., SJuO, note 230; Walker, LiHt, etc.. iii, 612 (A'ris/a/is). — British Possessions. Ilelophihia fratcr Osten Sacken, Cat. Dipt., 250, note 2150 ; Walker, List, etc., iii. 6i:{ (^ErtHtnlis). — HiuLson's Bay Territory. IJehphibiH chtilepiix Osten Sacken, Cat. Dipt., 250, note 2'.W; Walker, Dipt. Saniid,, 247 (EristaliH). — Canada. Baron Osten Sacken from an examination of the types ol these species, described as Em^rtYAs, ascertained that they belong to the group of Jff. borealis, groenlamUcus, and gladaliH. They cannot be recognized from the descriptions. PTERALLASTES. Pivrallaxtes Loew, Centiir., iv, 80, 1803. Head broader than the thorax, much flattened. Eyes bare, broadlj- contiguous in the male. Frontal triangle small, antenna] ])rominenco short, obtuse. Antenuse inserted rather below the middle of the head in profile, rather small; first two joints .short, third joint rounded: arista basal, bare. Face in the male nearly perpendicular, not descend ing far below the eyes, in profile gently concave above and more gently convex below, arched, not carinate; in the female concave; obliquely truncate below; cheeks narrow, the lower border forming with the plaiu- of the occijiut a little more than a I'ight angle. Scutellum wholly yel- lowish opacpie like the dorsum of the thorax. Abdomen elongate oval, nearly twice as long and broader than the thorax, broadest at tij) of second segment, thence gently narrowed to the tip of the fourth. Legs wholly unarmed, rather stout; hind femora moderately thickened, elon- gate, below with short lu'istly hairs; hind tibia' considerably arcuate, tiattened. Marg'ual cell of wing open, third vein with a deep sinuosity into the first posterior cell; anterior cross-vein very oblique, near outer third of discal ce'l, last section of fourth vein strongly sinuate, terininat- ing near the tip of third vein ; sixth vein nearly straight. Large, rather thickly i)ilose, moderately elongate species. Thorax densely yellowish pollinose ; abdomen black, shining. Tyjie of genus, P. thoracicus Loew, North America. Pterallastes thoracicuB. (Plate VIII, tij^s. 9, 9a.) Pterallaatcn thoracicns Loew, Centiir. , iv, i^O. Habitat. — Pennsylvania! S . Length, 9 to 12.5""". Face black, rather thickly covered with gray- SYNOPSIS OF NORTH AMERICAN SYRPHID^, 199 ish pollen, the checks bare and shining. Antennre reddish-brown. Frontal triangle more thickly clothed with yellowish dust. Thorax and scutelluin very thickly clotlied with opaque, ochraceous pollen, leaving only a faint, slightly brownish, median stripe ; pile abundant, not very loiijjf, wholly yellow. Pleura black, lightly dusted, moderately shining, except a brown stripe down the middle, which is tiiickly gray j)ollinose and gray pilose. Abdomen brownish-black, wholly shining; pile yel- low, broadly black pilose on the mi37, p. 2.')0. Rather large, elongate, moderately pilose species, black and yellow. Head short ; face not tuberculate, not produced ; the margin of the ebeeks forming not much more than a right angle with the plane of the occiput. Antennae short, third joint transverse ; arista bare. Legs il«', subopa«pie; on each side of the middle a slender opaque black striiM-. abbreviated both in front and behind; .just above the wing a reddisli elongate spot, aiul i le humeri also sometimes of the same color. 8cii t«'lluin luteous, the base blackish. Abdomen Idack, so.newhat shiniii;;, with short, thin, white pile. Legs black; front femora at the ends and more or less below, base of their tibiic, middle tibia) for the larger part, and the middle tarsi, except the tip, hind femora at base, along the undi'i sides, the tibiii* at base and tip, and the tarsi except the tip, ligiit yellow ; in the female the hind legs may be wholly reddish-yellow, except the tij) of tarsi. Wings brownish, with an elongate hyaline spot in tlit- tirst and second basal cells ; narrow clouds along the base of the first and fifth veins. Two specimens, New Haven, Conn., and Missouri (Mr. Theo Pergandi-i. Teuchocnemis Bacuntiua. (Pliito VII, Hj;. fi.) MUema liacunfinn Walker, List, etc., iii, ;')<):$. Teuchocnemis Jiacinitiiis Ostou Sackfiii, Bull. Buflf. Soc. Nat. Sci., iii, .')8; Cat Dii»t., i:'i.'), uotcH '2:^7, '238, p. 2.')0. Habitat. — Georgia, Texas! ^ , 9 . Length, lli '. Face light yellow, thiidy light-yellow polliucise Antenuje reddish yellow ; cheeks and occiput reddish yellow, narrowly whitish ])ollinose along the orbits. Front of female like the face; jhIo light yellow. Dorsum of thorax black, the broad lateral margin ex temling a little inwards at each humerus, and a large triangular s])()t in front of the. scutellum, the scutellum and a large spot on the meso- l)leuni' yellowish red ; ))ile of art i>erhaps due to the ettect of inates near the tip of the third; anterior cross-vein oblique, situated near the middle of discal cell. Large, black, shining species, densely i)ilose. TABLE OF SPECIES. 1.— Eyi'8 pilose ; more or less of the base of the abdomen with yellow pile, posticata Eyes bare ; abdomen wholly black pilose 2 2.— Eyes of male separated by a narrow suture in front of the ocelli; wings with a distinct brown spot Sackeni Eyes of male quite contiguous; wings indistinctly, rr not at all spotted. Hind tibiae of the male with a stout spur in the niif .die (form Baittias), or wholly without snch spur cimbiciformiB Mallota posticata. (Plate YIII, fig. 13.) Eriatalis poaticatus Fabricius, Syst. Antl.,237, 21 ; Wiedemann, Au.sh. Zw. Ins., ii, 194, fi2 (translation from Fabricius). Milesia harda Fay, .1. Acad. Phil., vi, 163 ; Compl. Wr., ii, 3.')? (male, not fi'inale). Erisfalis coactita Wiedemann, Auss. Zw. Ins., ii, 165. Imaiiama posticata Macquart, Dipt. Exot., ii, 2, 68 (male, not female). Merodon Balanua Walker, List, etc., i'i, 600. Merodon 6arrfM« Packard, Guide Study Ins., 399, fig. 319; Amer. Nat., ii, Jan., 1869, 593; pi. 12, figs. 10,10a; Glover, MS. notes Jour. Dipt., 1874, p. 32; jtl.,viii, fig. 30. Jffl /b to tarda Osten Sacken, Cat. Dipt, 135, 249. Mallota posticata Williston, Berl. Ent. Zeit., xxvii, 170 : Lintner, First An. Rep., 211, fig. 64. Habitat. — New England, Canada, New York, Kansas!, Indiana (Say). (J , 9 . Length, 11 to 15""". Eyes pilose, contiguous in the male for a little longer distance than in M. eimbiciformis. Face black, with light yellowish- white dust and pile, median stripe and cheeks shining ; frontal triangle clothed with the same dust as the face, except just below the base of the antenuje, where it is shining, pile yellowish or blackish ; vertex black, with black pile. Front in female clothed with black pile, more or less intermixed with yellow ; pile of occiput yellow, blackish *Ma?i},urbc, woolly. •i Ivl i-iK i ■ 202 BULLETIN 31, UNI I KD STATES NATIONAL MUSEUM. IK lifi 'I!,'".' townrds the toj). Antennii' brown or blackish, thinl Joint nearly orbic- ular. Thorax black, opa(|iHf on tlic disk, in front and on the Hi(ltt« brownish when denuded ; dorsum thi<'kl.v covered with bri^iht yellow furry pile, less abundant on tin* middle, where it is sometimes intermixed with black, ov not seldom (|nite black. Sciitellum yellow, bhuik at base ; l)ile yellow. Abdomen black, with abundant black and yellow pile ; tin- yellow pile varies nui(;h, tisually it is conlined to the lirst and basal j»art of the second sefjment, at other times coinprisinji' nearly the whole of the third sej,Mnent. When denuded of pile the al«lomcn often shows considerable red on the second and third sey;!nenls. Le^js black ; tips of femora, the tarsi, and sonuitimes a lar}j:e portion of the tibia', red: pile chietly bhuik, but with more or less yellow, especially on the front and middle pairs; hind femora much swollen, arcimte in the male, hind tibi{e compressed, especially in the male. Win{,'s nearly hyaline, usu- ally with a small, faintly brownish sjxjt opposite the tip of the auxiliary vein. This fly shows a striking- resemblance to EriHlaHn Jiavipen^ with whicb. iiuleed, it was <;oufounded by Say in his descri]>tion of Milesia harda. the female of which belonjjed to the former, the male to the present si)ecies. They are not oidy strikinjjfly similar in ai)pearance, but they vary in the same way, namely, in the amount of yellow and black ]nh on the thorax anecimen8 collected in June, from about blossoms of the blackberry and doj^wood (dornus panicniata), in com])any with M. vimbiciformix. Other s])ecimens 1 have compared from ('anada (William Brodie), New Vork (I'rofessor Lintner), Kansas (Professor Popenoe), and Pennsyl- vania (E. Keen). For discussion of the synonymy of this species see the followiug: Mallota cimbiciformis. ( IMnte VIII, tij;. 11, iiiul I'lato IX, ti>,'. H.) Syrphim dmbici/oniiix Fallen, Kyrpli., 27, 18. lirixlalix rimhiri/oviiiis Mci^fcii, Svst. licsclir., iii, I!K'), ;{. fmutisniti. iioxlicdta, Jlac(iiiint, Dipt. Kxot., ii, 'i,.08 (funialc only); tab. xii, fig. •■i\ Locw, X»Mif Bi'ifr.. iv. 17 ; id.. Anier. Jour. Sci., "2nd .series, xxxvii, 317. Mallold iiDxticata Scliincr, Diiit. Austr. in Vrrh. Zool. Hot. fie.sells., vii, 492; id,. Fauna Aiistr.. i, 'M.'>: Ostcn Sackcn, (.'at. Dipt. MuUota rimbici/ormix .ScIiintM', Nov. Hxpcd.. :!tM) ; AVllli.ston, Bcrl. Fnl. Zeit- Hi'hriCt, xxvii, 171. Merodon flautiax Walker. List, etc., iii, (iOO. Mallota Daiitiax Osteu Sacken, Cat. Dipt, and note 2;?t), j). '250: KuTHeh, Berlin Knt. Zeit., xxvii, 17*2. Mallota atrox (Berlin Mnsenni) Kar.sch, 1. c. Mallota (lentipcd (Williston) Liutner, First Au. Rep, of the Entomologist, '211. Hahitat. — Georgia, Indiana, Pennsylvania, New York, Connecticut. New Hampshire, Canada! ' . SYNOPSIS OF NORTH AMERICAN SYRPHIDiE. 203 c' . 9 . Length, 13 to 10'""'. HyoH bare, roiitiKnoiiH for a short dis- tiiiur below the ocelli in the male. Front in female narrowed above, hliicU, sliinintr, except on the sides below the ocelli, where it in narrowly liiit thickly dusted, like the face; pile black, intermixetl with yellowish .icross the ndddle and at the vertex. In the male the frontal triangle is riiickly dusted like the face, except just above the base of the an- tciiiiie; the i)ile is usually black, sometimes almost wholly yellowish. Fare deeply concave below the antennae to tip of tubercle, i)rodiU!e(l iiiodenitely downward, thickly covered on the sides with grayish or ^vliitish pollen, leaving a broad median stripe and cheeks shining black. Aiitenme brownish-black, the third joint somewhat re(hlish ; arista reddish. Posterior orbits thi<;kly il)' of the front. Tin' black pih' of the postal ior pint of the ali iloiiicti is soiiiotiriu>s u litth^ iiitciinixt'ii with reddish, hut in none do | tlnd any but black ])iU^ on th<^ second segment, a fact which will readily cnabh^ the species to be distinguished from M. poHticata. In the synonymy of the species there has been nnurh confusion. The tif'st one who |>ublished anything in re(;ard to American s|>ecime]is \va> Macipnirt. lie, unfortunately, from their close resemblance, suppost-ij the sinjrie fennile specimen which he examined to belouf,' with the niali' type of Fabricius' hWiHtaViH p<>nticatus, at that time in Bosc's museiiiii. at Paris, and which he used in describinj,' the species. In the i)n'si-iit species the eyes are bare, wliile in Kabritrius' ty|>es the eyes are pilose, a(;cordin}>' to Mac<]uart; this, to};ether with the fact that the base oi the alxlomen is never yellow pilose (the sparse lifjlit hairs on the lirst segment are very inconsi>icuous), renders it certain that the im'sent cannot be EriHtalix pottticatUH Fabr., as has been supposed by later au- thors. On tlu' other hand, there (!an hardly be any doid)tthat the spe cies described by Say as Mile/tia harda (male) is the true E. ponticalm of Fabricius. The description of cimhici/ormiH as jjfiven by Fallen does not quite agree Avith this, and comparison is needed with European specimen^ before the identity can be actually settle«l or denied. Loew believet! the sj)ecie8 to be the same. The flight of this fly is a little peculiar, and will enable one to readily distinguish it from its very near ally, M. posticata. It flies with a loud buzz, going here and there, in and about the iiatcbes of flowers. Mallota Sackeni. (Piute VIII, iig. 14.) Mallota posticata Osten Saclteu, WeHt. Dipt., 338. Mallota Sackeni Williston, Proc. Am. Phil. Soc, xx, 324. Habitat. — Washington, Texas I S . Length, 14""". Closely allied to M. cimhici/ormis, but differs iu the presence of a dark brown sjmt on the wings, and iu the eyes of the males being distinctly separated. Face black, covered with thick light yeUow pollen and pile, a broad meilian stripe and the cheeks shining. Antennte black, the third Joint more brownish, the angles apparently less rounded than in the i)rece(i ing species. Frontal triangle covered with the same dust and pile na on the face, except in the middle where it is shining. Eyes bare, con vergent below the ocellar triangle, but separated by a very distinct ii. terval. Thorax black, thickly covered on the dorsum, scutelhun, and })leurie with erect, furry, light yellow i>ile ; scutellum light yellow. Ab- domen black, shining, clothed with black pile; ou the first segment slightly intermixed with light colored. Legs black ; extreme tip of femora, base of tibiae, and the tarsi, obscure yellowish. Hind femora much swollen and bent, hind tibiae compressed. Wings hyaliue with a ir;' lj:U\ •SYNOl'SIM ol' NOI.'TII AMr.KICAN SVinMIIK.E. •205 iar^;»' brown .spot, (ixtciHliii;; iViiiii the tdifation of the Sfttond iiiiil fliinl veins t(» tlic ;iiit«'rinr cross vein ;iii(l iVoiii tin- (-(Mtii to tlir l)iis(' ttf tlm liiitl posterior cell. Miirjjiiial o.ssihli' tliiit nior<- material will r(>naratin;4 this species IVom the rorc;join;;. I'onr nnilcs Croin Waco, Texas, in the National Miisenni, since ex- iiiiined, all a;;r<'e in the . ll(,l,if(,t.—V,i'nvtli, 10 to 1.")""". Face black, sliiiiiiij,'oM the tubercle and the cheeks; elsewhere thickly covered with yellowish pollen and pile. An tenna' black ; aiista yellowish at the base and end. Front in niiileblaol; on the u|>per p.wt and above the base of the antenna'; elsewhere covond with yellowish dust. In the feinah' the front is broad, shining in tlic middle below, black isii above, pile near the ocelli Idackish ; on the oc ciput white. Thorax black, covered thickly with a brownish dust, leav inj;' faint indications of a slender median and lateral stripes, and with short, rather abundiint. obscure, yellow jjile. IMenra' dusted with wliitc; scutelluni sub-translucent yellow. Abdomen with short pile; in the male as follows: First sej;inent black ; .second segment black in front. exce])t at tlw^ sides, dilated in the niir more ot the femora, black, reddish yellow el.si'where, exec pt that the tibia* may he. .somewhat brownish before the tijt. Hind h'gs black, the knees only yellow. Wings hyaline, third longitudinal vein moderately bent into the tirst posterior cell. Twenty-nine si»eciinens, Canada (Hrodio), Washington Territory (Mor rison), Connecticut. The synonymy of T. albistylitm .seems probable ; the only dill'erence I ,' 208 ISULLKTIN :!1, UNITED STATES NATIONAL MUSEUM. '.'. ' (! that the (lcsciii)tio!i seems to indicate is tliiit the frout and middle fe- mora are more broadly yellow. The third longit'idinal vein of the wing is represented straight in his ligure, but Macquart's figures generally are unreliable. i ;"!,!' Tropidia mamillata. 'I'rojniUft mamillut'i L(w\v, Ccntur., i, 68. Hahiiat.—UVuunsl S . Length, 8""". Face carinate, with whitish pollen. Antenna light ochraceous. Dorsum of thorax blackish bronze, shining. Pleurae ciuereous])()llinose. Abdomen near the base black, near the tip fuscous, with two interrui>ted reddish bands. Femora black, at the extreme tip testaceous ; hind femora on the lower side near the base armed with a strong mammiform process. Front and middle iibiie simple, reddisli yellow; hind tibia? dilated, arcuate, fuscous l)lack, base and ui)pe;' side reddish, the tip i)roduc('d into a tooth. Tarsi reddish-yellow, fourth Joint black, the fifth joint in the hind ])air or in all fu.scous. Ilalteres whitish. Wings cinereous hyaline; stigma yellow. Translation, compared with the type. Will be very readily recog- nized by the nuimmillate tubercle on the uuder and inner side of the base of tiu5 hind femora; it is long and directed inwards and backwards. Tropidia calcarata, ii. up. Hahiiaf. — Mi(;higan ! 9 . Length, t)""". Head black ; face and front lightly gray pollinose. Antenuie brownish yellow ; third joint verj" large, reaching nearly to the oral margin, subcpuidrate ; arista black. Face but little juoduced below the eyes, the lower margin of the cheeks nearly straight and perpendicular to the plane of the occiput. Thorax black, but little shining; humeri and pleura? i»olliuose. Abdomen opaque, blacK, or dark brown, the lateial margins of the second and third .segments (broader in IVont of each) yellow ; both of these segments with linear hind margins ; fourth segment almost wholly light-grayish polliiio.se. with a yellow hind margin. Legs dark-brown or black, the base of tibia?, anti(lH5>2); St. Fiirgeiin luul Servillo. Km-ycl. Mcth., x, r>lH (,lH5>r>) ; genus, Macquart, Hist. Nut. Dipt., i, 497 (IrtlU). Somtila Macfinart, Diju. Exot. ".if Suppi., ."i7, 1847. Eriophora I'liillipi, Vcrli. Zooi. Bot. (it'scll., xv, ?;((), Irtfi.'). Eurhlnomallolu IJi;;;ot, Aunalt'H 8()c. Eut. Frame, \tij^'i\ Bull., No. •>. Brachumji'm Williston, Can. Ent., xiv, 77, \ff^'i. Medium to larjje sized s])('t'ios, l)la<',k or {irecni.sh black, witli or without ligiit ground marking.s. Ih-ad much flattened, l>roadcr tlian the thorax. Anteiuiie situated upon a i>roininent conical frontal proceswS, tbird joint orbicular, or broader than long; arista bare. Face moder- ately produceile, on the vertex with yellow pile. I'r<)bos(!is not very long. Posterior orbits rather broad, yellowish d'-Med and with long, yellowish white pile. Thorax with abundant, rather long yellowish pile in front, black across the middle between the wiiijjs. behind yellow, abundant and bushy on the i)ost-alar callosities, quite long and thick on the scutellum. Pleurae with dense yellow pile. Ab- (^ HVNOl'Sl.S OF NORTH A.MKUICAN SYUFHllJ.E. (loiiitMi Vfi y .short, broad, with iibiiiidaiit i)ile, ishiiiiii;; bhick, the secoiul st>Mii*'"t oi)iUiue; an opaque, laterally abbreviated cross-band on the third segment; pile on the sides of the tirst and second segments and on the fonrth piid lifth, longer, yellow, elsewhere black. Legs wholly black, with long yellowish pile. Wings with a distinct blackish shade on ontei' part. Kive speciniens (Morrison, Baron). Criorhina lupina. ( Plato IX, (i<;«. (I, (in, (M).) Uracil ijmijia lupina Williston, Can. Eiit., xiv, 77, 1882. I'hirhiiiamaUiila lupina Willisto!!, I'roc. Am. Phil. Soc, xx, 330, 18Mi. f Eiii-liiuomallota metallica Bif^ot, Bullet, bi-niens. Soc. Ent. Fran, (diafinosis only), IS!<2. Habitat. — California ! ^,9. Length, 9 to 12'"'". Black, shining. Antenna? brownish-black, third. joint at the base sometimes, second joint at the tip, and first Joint, at the base, reddish ; tirst Joint twice the length of the second, third broader than long. Face thickly clothed with yellowish white pollen ami pile, a broad median strijje and the cheeks shining. Front in fe- male broa.l, dusted on the .sides, i)ile long and yellowi.sh on the sides; much produced downwards and forwards, conical; in the male the tioiital i)rocess very i)rominent and the eyes well .se])aratedby theswol- l(Mi o;;ellar callosity. Po.sterior orbits thickly light gray jjollino.se and pilcKse. Thorax shining metallic black; clothed with moderately abun- dant and very long light-reddish yellow i)ile, on the ])leura* whiti.sh. Abdomen shining black, with long, rather spar.se, light-colored i)ile. lA'gs with long light-(u)lored pile; black, the extreme tip of femora, basid third of tibiae and baisal joints of tarsi, yellowi.sh or luteous, the tibia! otherwise more of a brown color. Wings sub-hyaline, with a bhickish shade on the ,',1 W J. M BULLETIN :U, UNITED STATES NATIONAL MUSEUM. :: 1 liiiul yellow, across from the root of the wings black. Pile of pleurae yt^llow. Scutelluin black, with lonj; yellow pile. Abdoinoii short, broad, Nliiniug black, pile yellow, somewhat intermixed with black behind; on the first, second, and part of the third segnjent the j,'ronnd color i,s obscured by jjrayish dust and more abundant pile. Le}?s deep red; femora, except the tip, black; a riufj in the middle of the tibite deeper in color, or black. VVinfjs hyaline, a little clouded on outer part. Three specimens, from Massacthusetts (Mr. S. Ilenshaw), Maine. CYNOKIilNA. Cynorhina, hiiI). jh-h. u<>\., aiitf. \>. -jiiK. Criorhlna (Cynorhina) umbratilis, ti.sp. i^I'latii IX, lij;. 7.) llabiUit, — Connccticrut I 9 . licngth, 10""". Face black, thickly dusted with white on the sides, a median stripe and the cheeks shining;'. Antennal process rather small, the face considerably excavated below, produced downward and some- wh;i! f(»rwards. Antenna' reddish-brown, thinl joint large, orbicular, I'ront broader above than in the precedinjj specMes, mostly shining, with rather long yellowish pile; occinut black, with yellowish pile and gniy pollen. Thorax shining black, with rather abundant, obscurely yellow ])ilf, black across the midla('k, third jnint orl)i('ulai', brown. Fi'ont in lemale sh.'Tiiii;: black, with dusi on Ihesides. Fiontal triangle black, shiuing, with dust near the orbits. Occiput black, with whitish pile and thickly covered with gn dusky p sbiuing the last with a and con broadly yellow, except I and hist middle and tip. Two Mountai speeiniei of the ai base, ye' 1 do n said of t as the ( based o Sacken, Three 23, from Criorhina C'riVi HnbiU ''$. L low; up] l)ik*; a I black; t with eiei ing, clot the nasc l)lack ; i (lie of cii low ; thi wiiiys ai extends within t the first the vein '•A si Desci I . t,. ' t 14 f .V\ BUM. ile of pIeur£B short, broad, ack behind; )nnd color is :s deep red; iie deeper ill art. , Maine. Dii the sides, ather small, 1 and some- e, orbicular, liining, with lie and gray irely yellow ind pleura, sides of sec- orange yd *d by thick (ides of tilt' pile of .sec- I yellowish- mora, basal it two joints >hter at the veins. yinianvs, iu , 1878. lia, Miiiue SYNOPSIS OF NORTH AMERICAN SYRPHID^. •J 13 with grayish dust. Thorax greenish- black, shining, with rather long dusky pile, more abundant and whitish on the i>lenrai. Abdoriicti dcei) .shilling greenish-blach, with short erect black pile, on the sides and on the last segment longer, yellowish white ; .secoiul .segment on the sides with a large yellow triangle, reaching the whole length of the segment and continuous on the side of the third, narrowly in the male, more brdadly in the female, clothed with abundant yellow i)ile. Legs chiefly yellow, with light yellowi.sh pile; front femora, except the ti]), middle, except ba.se and end, and the hind ])air, excei)t a broad ]>reai)ica] ring, and last three joints of all the tarsi, black ; front tibi;e with a mow. '•A single female specimen." — O. Sacken. Description compared with the type .specimen at Cambridge. ■I 1 1 tmuti^ 214 I!i 1.M;TIN :I1, UNITED STATES NATIONAL MUSEUM. :« V 1 1 !'Vf M Criorlii:ia {Cynoihina^ nigra, ii. h|i. Uahihtl. — New Ilaiiijfsliiri*! 9. licnytli, 7""". Lower part of tlni front, anteiinte, and face, reddish yellow; IVont above, black ; clieelvN sliinin, tijj. '2. Criorhina analin OsUn .Saekt-ti, Cat. Dipt., 13(i ; Willislon, Proc. Am. Phil. Soc, XX, :{:{0. ^M/n/«^— Eastern States ! cJ , 9 . Length, 9 to 12""". Face light reddish yellow, the sides lightly duste«l with white, nearly peri)endicular below the proniiiieiit anteniial proc^ess, gently convex on the middle ; cheeks black, or with a blackish stripe. Antenua; of the .same color as the face, the first two joints with short blaitk pile above, third Joint l.trge, ronndecL Front in female nearly of the same color, shining below, .ec()iid .segment, longer, whitish ; the black encroaches moiv oi' less on tiie fourth .segment, usually forming a more or less triangular dilatation; remainder of theai)domen conspicuously orange-yellow, witli the same colored pile. Legs chiefly black, with black and light yellow })ile ; tip of femora, the base and end of rhe front and middle tibiie, and the narrow base and abrupt end of hind tibiie, and all the tarsi, except the last two joints, light yellow; the front and middle tibiic more brownish in the middle. Wings hyaline, a little yellowish in front. Xunu'rous sjiecimens. Criorhina (Cynorhina) bumeralis. (Pliitf IX, li,»)pa(pie yellow. Margin of scntelluin yellow. Alxlomen black, .second sej;nient on the sides with a liirjce trianjjular yellow spot; in the female the thirdand fourth sejjnients on the sides in front with a rectanfjnlaispot, broadly separated, and the fifth sefjnient yellow, except the black tip, which is prolonj{e, 7 ; Macquart, Dipt. Exot., ii, 2, fO, i>; till). XV, li<;. .^ tSiiri>hiin pro/iiniiH VV.-iIkt-r. Li.sf, etc., iii, .'J7y. Habitat. — Savannah (VVied.). /Enea, abdomine nigro, maculis duabus, scutelli apice, }jeniculi.s(pui ferrugineis. Kiickenschild erzfarben; Hinte»leibschwarz,zwei Flecken, Si)itze des Hcliildchens und Kniee rostgelb. — I.ange o.^ Linien, $ . Antenna' blackish-brown, hind border of third Joint ferruginou." yellow. F;u!e yellow, lik»' half bleached wax, in some reflections nearly brassy-yellow shining; low«'st parr of Iront, on which the antenna' are situated, similar. Thorax yellowish metallic with yellow ])ile, base of .seutellum blackish, tij) yellow. J'leuia' blackish, with a broad yellow- isli metallii! strii)e covered with yellow i)ile. Aixhmien black with yel- lowish pile; base of second and third segments on each side with a small ferruginous spctt, on the .second the inner «'nd cre.scentric, on the tliird the spot is shorter, nearly quadrate. Wings nearly hyaline, the eosta strongly yellowish, towards the end a little brownish, the basal veins, the .stigma and the haiteres yelli-wisli. Legs i>itchy-blackish bntwii, bi'..se and tip of the femora ferruginous yellow, tibia* the same, in .some reflections a little whitish ; hind tibiu' in the middle broadly brown; anterior tarsi ferruginous yellow with brown tip, hind ones nearly wholly brown. — Translation from Wiedemann, I. c. This species mnst be very similar to the j)receding; \t may be the same, but comparison is neeiU', below like tin* t'ai'o ; tVoiitiil triaii;:l<' in male ycllnw, vyvn ratlier nioir, conti^ruoiis than in aim I is, {hi' frontal process i'atli«Ml('>s l)roJ('(rtin{j;. Anteninu yellowish hrown, or blackish brown, the secdnd joint Hoinetiines yellow with Ihutk above, the third Joint always of i, lifjhter color below. Thoiax Hhininjj: {greenish black ; dorsiiin witli blackish |)ile across the middle, in front and on the Ncutellntn, yellow; luiineri yellow with a small continent sjmt below, ineso-plenra' yellow. ish gray pollinose and pilose. Hcntellum black, the edf-e someiiincN narrowly Inteons. Abdomen black ; sectond segment opaipie, with two large yellow spots, narrcjwly separatei convexity being toward the middle), with a sharp, median angular in cision behind, md attenuated nearly to a point on the sides of the ;ili domen ; fonvtli segment similar in female, in male wholly black, oi with a triangular spot in front and reddish behind ; hypopygiuni inl dish or yellow . llfth segment in female yellow in front; black at ti|i. Front coxic white pollinose in front; all the femora black, exccj)! ihi- tip; front anots small and nearly rounded. The posterior se;rmcnts iiiai;^iiie(l with y«'llow behiml and clothed with yellow i)ile, most abun- (huit on the last seated, the tliinl oblicpiely oval ; arista bare. Face laterally compressed, forming? a rounded ridjic in the middle, on the upper part sometimes sharply lidgcd, i)roduced nearly forwards, more or le.ss snout like, gently con- cave from antenna' to tip, the end notched, ('heeks not broad, the lower border nearly at right angles to the plane of the occiput. Tho- rax rather short and broiid. Abdomen oval. Legs stout, the hind femora more or less thickened, with s])ines below; in the male tlu^ hind coxie sometimes tuberculat*' and the femora and the 1il)ia' bent. Mar- ginal ceil of wings oi»en ; third longitudinal vein nearly straight; cross- vein beyond the middle of the discal cell and oblique. Type of genus C. (ihpcr O. JS., North America. TAULi: OF Sl'KCIES. 1.— l)()rsum of tlioiiixclotliL'd witli tliick yellow, or reddish-yellow pile, on tlie plcii- r:e black ; wiiij^.s with lirowiiisli elouds aloiijj the veiiiM 2 Dorsum of thorax clothed witiilong, ;;rayisli or yellowisli-jfray jiile, on the pleu- ra'yellowish-white; al.donieii deei) Iduisli-iiietallie . . < cyanogaster ( cyanella 2— From ill female hroail, with yellow ]iile ; hind femora somewhat iiicrassate, alopex Front in female clotheil with IdacU pile ; hind femora thickened, in male mech more so and riirved femorata * Kij'ioi, a ram; ni}S}()a, front. 1 '1 1 tl I *l u 21S III l.l.miN :tl, IMTKI) STATKS NATIUNAl. Ml HKUM. M. : '(' !!( h) Ciiopiora cyanognster. lU'uilniiiiilpiiH iiiiiiiDiiii'ter Lofw, CViit iir., X, Til. <'rii>jiniiii tiiiHli V f)Htt}i\ HiM'ktMi, Cut. Dipt., \'M\, iidIc '.'11, p. 'i.M. Jlohifiil. — IN'mi.sylviiiiiii (Loew), ('ol(»rii(I() ! 9. LciiyHi, II""". Black, wliifc pilosr. A ImIoiih ti viol?ici'(»iis. DlarU, .sliiiiiii;;, white piloMr. Head of the .saiiii lor. i\iit('iiii:i' li^ <'oiis hiack, llrst two Joiiit.s nitlicr loii<;:, tliiri()a'uhe white. \Vin;;'s cinereous, h\ aline, near tin' ti)> more saturate cinere(Mis. Tip of cutstal cell and sticma wholly di lutely infuseate. Veins fn.sconsl)la<;k, the transversal ones .slenderly <'louded with fuscou.s. — Translation from iu-ijiinal. ^. Leiiyth, Ili"'"'. Heiul in profile like that of (\ fviuoratn. Kvcs narrowly separated below th«' ocelli; frontal trianjile li<,dit yellowisji jiiiay |(ollino.se, except a median shininjj strip*', tin* j;round-«!olor on ench .si«b' below luteous. Antenna- yellowish-brown. Dorsum of thorax and sile of femora in Iai};t' part black; hind femora incrassate and arcuate; hind tibise uilatcd and with an obtuse any:le on the inner side above. One specimen, Colorado (Morri.son), altitude 8,000 feet. Then* art' some discrepancies from the (uif-iiial description, but I woidd not cou sider them more than individual or varietal without coniparLsun of Easteiti specimens in both .sexes. My male diU'eis very distim-tly from that of ('. cyanclla, in the less jtroduced epistonia, more thickened and arcuate hind femora, and, perhaps, also, in the nu)re slender abdoincn, The absence of the opaque bands of the abdomen in the male, will at once distiiifjuish them. My femalo of C. ci/anella has an opaque band. aiul as Osten Sacken did not indicate its presence in the female in lii.>i orijiiiial description, .K. 1M1» vertex black, but little sliiiiiii;- in tlie reiiiiiU- and tliiekly elotlied with yellowish wliite pile, some of which ileseeiids iihtiiy the side of the f'ae«', Itelttw the antenna-; the oeeipnt ami the posterior an'in, whi<-,h are shinin;;'; the third sej^ment has an iircnated, somewhat nai-row, opa(|ne black i-ross band, sonu'times inter- iiipted in iIh' ndddle. Leys black ; tibia- sometimes brown; knees of the Mrst two pairs yellowish bi-own ; le<;s beset with whitish pih-, lonj(er Oil the femora ; hind femora somewhat thickened; hind tibia- rather stont and somewhat cnrved, espe«-ndly on the distal part. Winys snb- hyaline, j'Tayish. Two males ami one fenude (O.T. r»aron), California. This des(;ri|>tion is hilt little amend(-d from the orij^inal, also drawn from \h\vv specimens. My temale, which nni. be siunewhat teneral, has the le;,fs also more re«.) Crioprora fvmorttitt Willi.stoii, Proc. Am. Phil. Soc, \x. !1'J9 Habitat. — Orej^on, \Vashinj;lon Territoiy I d , 9 . Lenjith. l.j to 1(5""". l)(-ep shiniiij; black. Front in female .somewhat nairowed above, with black pile, a little less shining and I'oppery- colored above in the male, at least a spot of whitish dust above the antennic on the side. I\v«-s in mah- narr<»wly separated below the ocelli. Face everywln-ie shiniip^, bar<-, oidy mo(l(-rat(-ly i»rodn«!ed and obtuse below, Anleniue reddish blown ; arista yellow. Dorsum of thorax and seutellnm shininji' metallic blac-k, with abnmlaiit, inoder ately Ion;;, yellow ])ile; pleura- with bl.H^k pile. Abdonu-n somewhat ehuigate in the male, oval in tin- femaU-, with a brassy reHe(!tion, mu(!h shininy; first seynn-nt, except tin- sides, and the second in front and middle subopaque ; |)ile shoit, not very abiMalant, bla(;k. longer near the sides; on the sides of the second s(-,uinenf lonj^er and yellow. Knees isliylitly redriish, pile of leys bla('k, short and s])arse on the tibia-; the front and hind tai-si with yolden pubescence; hind femora in the male uuich thickened and bent, with a row of short spinous tubercles below: hind coxae obtusely tuberculate below, and the hind tibiui abruptly au- gulated; in the female the hind femoi;i and libiic not bent, the former swolleu, but the tubercles less distinct j the coxoe not at all tuberculate; 111 220 Bl'LLETIN \il, UNITED STATES NATIONAL MCSEUM. in both st'xes the ft'inorii with a triiiiij;iihir projection below near ilic tip and a e,orresj)onparently a little more deeply concave in prolile and the insect is larger. * JIoKoi, Bheep wool. Pocota gr lladi lirav llabita 6. Le black, de low pile, blackish whitish I obscurel.'s of the wi Posterioi abdomen longer y» retldish ; hind tart reddish. One sp Ihac Dark moderate (ioinen n iiMially 111 Europe. l.-lliiul 1 band: Hind 2— l.i'jis w l.t'ijs in 3.— Second liaiid Alid()in( 4— Ddi'sni Ddismi Brachypa] llntoi Ihthita $, 9. iibsciirel.N iroiital ti' mule bro;: Antenna) ,11 SYNOPSIS OF NORTH AMERICAN SYRPHIDiE. 221 Pocota grandis (Plate, X, figs. 7, 7a.) lladromii'ui iirtiiidis Willistoii, Cau. Eiit., xiv, 79. liravhjipalpuH Morr'mml Higot, Aiinales Soc. Ent. for 1883,355. llabitat. — Washington Territory ! i . Length, L*2 to L'.'V'"", of wiufjs IT""", lini.ssy-hlack, sliiniufj. Front black, (ItMisely clotlied with ycMowish-fjray poUon, and with short yel- low pile, intermixed with Idack at tiie vertex. Antennie brownish-red. blackish towaid the ba.se. Face whitish-yellow, thickly (M)vered with whitish pollen ; in the middle below the anteiiiiie the {ground color is obscurely blackish; cheeks black, shining;'. Dorsum (»ftiiorax in front of the wiiijjs, and the pleura*, densely clothed with short yellow pile. Posterior half of thorax, the scntellnm and the first three se;;-ments of abdomen with thick, short, black i)ile; fourth and liftli se<>-metits with loiigei' yellow pile. Lef^s black, with short black pile; knees slij>htly reildish ; front tibia? in front, the tip of hind tibia', and the front and hind tarsi yellowish-red, with short, thick, j-olden pile ; middle tarsi reddish. Wings hyaline, costal and sub-costal cells yellowish. One specimen. BRACHYPALPUS.* BtM'hiii>ali>HK MiUMimut, Mist. Nat. Dipt., i, .Vj:!, 18:i4. Dark colored .species, the body wholly without yellow markings, moderately or thickly pilose. Head and wings as in Pocota, but the ab ilonieii narrower than the thorax, elongate ; hind femora somewhat, usually much, thickened and elongate. Type of genus, />'. rarus Panzer. Europe. 'I"AI5T>E OF SPECIES. l.-IIiii(l loiiiora with sliort liri.stlcs IicIdw ; abilnnitMi with lirilliaiit iiit'tallii- cross- \)ii\H\n(CaHil)roliola) 4 Hind I'ciiKiii) iii>t with )iristl('M liflow ; ahdonicn uiiitoniily hlacU 2 2.— l.i'^H wholly hiacU Rileyi l,i'.u;s ill ])ai't yellow 3 3— Second and third abdominal scL^uiciits each with a hroad, posterior, opaiiue cnts^- liaiid; smaller species parvus Alidomen not with sn<'h <'ross-liiiiids; larj^er siiecie.s frontosiis 4.— lliirsum ol' thorax. y(dl()w pilose sorosis Dorsnni eliieliy hlaek pilose pulcher Brachypalpus frontosiis. (Plati' X, ti,:;. 8.) Urdi'liiiiKtljiitu j'roitlDsni I^oew, Centiir., \', .")(). Hdliitni. — District of Columbin, Pennsylvaniii ! ^ , 9 . Length, 10 to 12"'"'. IJlacU, shining, clothed with whiti.sh, or iil)s('urely yellowish-white pile. lOyes of male very briefly contiutious, iioiital triangle coven^d with yellowish-whitish i)olIen ; front in the fe- male broa(.', with a median white pollinose fascia ; obsoh^te in tin? middle. Antenna} reddish brown or blackish ; first two Joints a little elongate. fifjcxx^i, short; ]»ali»U8. V 'I I ■' Ot>-) nrM.KTiN ;ii, united states national mtseum. : li .*i'\ '*t' sonu'f iiiK'sdarli red, tliird joint obliquely oval; arista yellowi.sli-hrowiii.sii, Fa(!(' retreating to nearly as low a>s the bottom of the eyes, the epistoiim lyrodneed, in profile deeply concave; broadly shininfj acaoss tlie middle, above, for the whole widtii,and for a short distance below tiie antenna., whitish ])ollinose ; below, an oblique stripe runs from the eye to the ornl mar<;in in front. Dersum of thorax" and scutelhim metallic liliick. shininj;, obscured by the pile, the former with four sub-obsolete coppen purple strii)es. AbdonuMi black, oi- brownish black, s»ib-opa<|ue in the male on the posterior part of Ihi; .second and third sejiinents; pile wholly lijiht colored. Lejis black, extreme tip of femora, and narrow base of tibiie, reddish yellow, tlu^ intermediate til»ia' more leddisji fhroufihout, exove, corres])ondiii{;- to the femoral projection, ami a stout sj)urat tlic lower end, both of which are wanting" in the female. Ilalteres and tejiuhe lij^ht yellow. Winjis nearly hyaline, near the end somewliat iidiiscated; transverse veins lijjhtly clouded; stifi'ma luteous. Two male spectimens from Pennsylvania (Eugene Keen), and a tenc ral female bred bv Professoi- IJilev. ii. 1.1 Brachypalpus Rileyi, u. sp. JInhitdt. — North Carolina ! 9. Lenj>th, 7""". Dlack. Anteniiie blackish-brown, third joint transversely oval; arista, yellow. Face and posterior orbits jrray poll!- ncKse; (dM'eks sliininj;' black. Lower i)art of the front shininj:; across the niiddhi broadly pollinose; black |)il()se above. Dorsum of ilioiax black, sparstdy ])ilose, in the middle with two narrow <)j>a(pie stripes; on eacdi side a, similar, abbreviated, and intei'ru|)ted one. Abdoinci; oval, i)ri;;ht shininj,^ black, sparsely li<;ht pilose; the first sejjment, llir st'cond sejj;ment, except a lai-j^e triangular shining si)ot on each side, narrowly separated at their ti|)s, and a jjosterior band on the thirnient', tlir oaeli side, ' third se;;- ])i](>; liiiiii ()\v lirowii I'iniltiiiiiiic ior JiilevV SO] »a rated with two )l)reviated lodcrately )Iack : flit second and third scjjiiients each wiiii a hroad posterior opa(ine bhick band, with a sleiKh'r merab!y sliorter than the femora. Wings nearly livaline, with brownish chaids on the middle cross-veins. Une specimen, Colorado (National Museum, Professor IJiley's collec- tion). It is very possible that this is the male of Ji. L'ihiji, but tlie metallic colorinj; of the body and the color of the legs make it doubtful. Brachypalpus sorosis, ii. sp. IldhHat. — Georgia! $. Length, 12""". Frontal triangle and face yellow. Antenine yellowish red. Cheeks black. Dorsum of thorax shining metallic hioMze, with erect, rather abundant light yellow jdle. Humeri ycdlow- isli red. Pleura.' black, in the middle with light yellow pile. Scuta.) llraclijiiMlpiiH piilclicr Willi.stm), Can. Eiit., xiv, 71). Calliprohola ivrva l!J;^<)t, Amiiili's Soc. Eiit. dti l^'rancc, IHrtH, j). W'fi. Jlohifdf. — (Jregoii, Washington Territory! (5,9. liengMi, IL' to 1(5"'"'. Face yellow, with bhudv lnish-bronze, with short golden pile and opacpie black markings as follows: first segment, except the sides, in the female, in the male the hind border also shining; ' 1 i i I U 224 BULLETIN 31, U.VITED STATES NATIONAL MUSEUM. im ?■• \ . i second se^mt'iitoii the front })art,iinmora rathe'- stout, the h ijid pair moderately thi( kened ; front and mid. ■die ])airs mostly brownish or black, sometimes j)revailin{j: yellow, black ish above, hind femora varyinfjf from a blackish rin},' near the base to almost wholly bhu^k, below with short black bristly hairs near the end: last three joints of the tarsi black. Winjjs smoky hyaline, stigma ye! lowish brown. Twelve specimens, Mount IJood, Oregon, and Wasbingtou Territory {H. K. Morrison, Professor Conistock). ! I >i XYLOTA.* Xylota MeifjtMi, Syst. Besolir. iii, 211, l&ir>. [ItUophUuii Mci^fii, Illifrer's Maj;., ii, '27:5, IrtO:}, Micraploma \\ rstwood. Iiitrodiic'tioii to Class, of Insects, i. Medium to large sized species, slender, the abdomen more or less rod. yellow, oi' metallic. Head hemispherical. Antennae situated on ii more or less i)rominent eoni(!al jtrojection, lirst two Joints short, tlic Ihird rather large, oval or round, with a basal, bare arista. Face in ] »roti I e concave, without tubercle, transveisely arched or rarely cariiiate, ojal margin in front i)roj('cting, but not extending as far forward ;is the base of the aiiteiiiiie. Eyes bare, contiguous in the male; front in lemnle iiarrowe. Tliorax large; scutellum thinne 3.— Sicdiid iiiiil 1 liird ivli(liiriiiii:il sc;riiii'iits (at least ) red 4 S<'('oiiil and lliird ,sc;4im!nts wliolly Mack, or Willi ytdlow spots 7 4 — Vlidniiii'ii wliDJIy ird cx.'ciir flic I'lrst sc,:^'iiiciit ; Iiiiid ( oxM' of I lie lualo without :i tootli hidow bicolor Ahdoiiicii i'xei'|)t flic tii>f si'j;!iiciit, not w'lolly red 5 5.- Second alxloiiiiiial sc^^iiiciit with a hasal Idack friaiic;lc; fhc'J-l s<'i.<-iiicnf s \. itji narrow lateral lilack iiiaririns marginalis Alidonu n not m> niaiked 6 6. — Hind cox;e III male with a siMir l)elow flavitibia Hind eoAic of 'iia'e w it lioiit a !-'i)Mr I'clow n tlia 7.— I'ronf and niiddle h;;s ai:d a Iarj;-e \>r\\ of flic hind femora yellow ; laruc S|)ecies 8 I'ronr le;;s In lar,L;c' ]iait Mack 9 8- (Ox.e hlack curvipes Coxa' yellow vec :rs 9.-- Al)do;iien loiitj;, blender, witli i wo yellow spots on the second scLtnicnl .... aiigvistiventri.s Alxloinen not nnnsnally r-lendcr ... 10 10. — Alidonicn will: two pairs o| yellow spots 12 .Miiioiiieii wh(dly black 11 11.— Third joint of iinfenme Imt little l(ini;cr than Kroad . . Anthreas, obscnra riiird Joint Iar.,e. innch loii'^er than hroad elong^ta 12.— I lind I'einora nnnli Ihickciied, .sniallci' sjiccies 13 Hind femora i hratcly thickened 14 13.-~.vrisla wholly hlack nemorum Arista ytdlow j>t the base fraudulo.sa 14.~-Fonrlh alxloininal scj;iiieiit brilliant bronze; third l()nj;itii(liual vein ^enrly ciirv(>(l , . analis I'^onrth alidoininal seij,iiicnt black ; third vein quite straight . . . ejunciQu For other .species, see descriptions. Xylota (?) tuberaiiB, n. Hp. Habit(it.— l\'\i\H ! 6. Lenstli,i> to 10""". Sliiiiiiij.i- black. Face thickly gray pollinose, ix('e])t on the tubercle ; occi])ut and i)Osterior orbitsdenselypollino.se. Tliinl joint ofantennte not large, orbicular; thorax shinino-, thinly and slinit yellowish and blaclc pilose. xVbiloineu wholly shininj^ bhick, iiiiiily bare. Leos bla(;k, all tiie tarsi, excei»;" the last two joints, yellow- ish white. Hind femora thickened and elonoate, riot arcuate. Coxie uitliout si)nrs. Winos lu'arly hyaline toward the base, inliLscated on outer i)art. Hti.yiiiii luteons. One specimen, Texas, National ^Museum. Tlie present species cannot i)roperly be plticed in this genus. The iienration is tiie same, except that the cross-vein is not at all obliipie. Tlic head in o(.iu'raI structure is the same, but the lace is very distin(!tly 'iiliciculiite. In profile it is stroiioly concave below the antenna!, then tiiriDs it small but ])romiiient tubercle ouposite tiie lower Itorder of the lycs. and the iace is more ])ro(hiced thai, in Xylota. The cheeks jire 'noiider and form tin obtuse angle with the plane of the occiput. The iibdomeu is elongate, but is iiuudi stouter and broader tlum in most It' 'i ' ■S ! Uf U I i\ 2 -2 (J iu:i.i.i:ri.\ ;si, imtki) states national mu.skim. i li»'^ P' X.vlotiv,. It is as hroiul as tlio thorax, tlio second and third soj^mcnts lie, Illy paralit'l on tlic sides. I suspect tlial tlie female ab(h)nien may be broadei-, and tlie face without a tubercle; if so there is evidently a relationshi]) with MyiolepUh Xylota marginalis, ii. sp. .' Sijlold lAho Wiilki'i', liist, ('t(;., iii, U^^). llahilui. — White Mountains ! ?. lienjilh, 10""'. Front broad, only fiently narrowed above, shiniiij,' black, pollinose on each side, broadly nearly the middle; pile white, somewhat dusky near tlie vertex. Antenna' yellowisli red, the arista wholly yellow; the flist Joint black, third joint rounded, a little lon-jcr than broad. Face shininj;' black, liji'htly whitish dusted on each side he- low the antenna'. Dorsnm of thoiax shininj;' bronze black, with very short, obscaire whitish jtile; in the midiie wholly white. All the femora except their immediate tip, and the broad distal end of the hind tibiic, black ; front and middle tibii« yellow, with the distal ends biown, and a less distinct brownish v'uv^ before the middle; hind tibia', except the distal ])art, red, with a brown riny on basal third; first three Joints of all the tarsi light yellow, tlie terminiil joints blackish ; hind femora much thickened, hind coxie without spurs, hind tibiit! with a terminal sjiur. \Vin;j:s nearly hyaline, distinctly tinj^ed with yellowish alony the veins, stij4ina opaque yellow; the biise of the nmrj'inal cell, the anterior cross-vein, and the cross-veins at base •of discal ami fourth posterior cells, conspicuously clouded with brown, One specimen, near IVIount Washiiifjiton, August 1. This agrees toler- ably well with Walker's description of A'. Z//>o, except that the anteiinre are not "black with the first joint ferruginous" and his description of the abdomen will not apply, viz, "dark red, slightly pitchy on the sides and hind borders of the segments." Xylota analis, ii. tsp. JInhifut. — California, New IMexico ! ^,5. Length, 11 to J2""". P^'ront of female considerably narrowed above, shining I)lack, tow;ird the vertex metallic, across the iiinhlli' l»roadIy yellowisli gray jiollinosi' and siniilaily pilose. Aiiteiina' blai'k. vlie third joint browii, with moic or h'ss reddish, lounded, not lonuei' lliaii Inoad, arista wholly liilcons. Vncv black, moderately tliirkly whiii' pollinose below the antenna'; frontal triangle thickly white polli- ■ lose excei»t a lunate sjjot abo\»' ilie aiiteiiiia'. Dorsum of tlmrax Iti'onze black, more iiutaliie in Iroiit, a sericeous spot to the inner side •ut each iHimcrus; pile very short, in front yellow, across the middle wmmn ipwp ■^^ tlic face Uyiolcpta- ?, shin ill!,' ile wliitf, lie arista tie loiifjcr ;li side he- wit li very Lor stripes Itv wiiiti*; lit, except exteudiiig e second, short |)ii(' , and the iiii yellow, before tlie n ring on B terminal Dut spurs, distinctly tlie base lis at base th brown, rees tolor- ( anteiinfE jriptioii of the sides narrowed le iiiiddli' iiiv bliii'k. (it loii.uer y thickly hitc i>olli- i)t' thorax inner side ic middle SYNOPSIS 01' NORTH A.MHKICAN SYUiMUU.K 227 hlackisli. Abdomen: lirst sejjinent l)ronze black, sliiiiiMg; ronrtli seg- ment and the following very brilliant golden bronze; second segment ()pa(|iie black, on each side with a large triangle shining yellow, its iiiiler lK)rdci' bronze; third segment similar, but the l)laek not as extcui- >ive on the front margin and the yellow not tilling ont the whole of the triangle, which is elsewhere shining bronze like th«' fourth segment; pile yellow, except m the opaque black portions, where it is black. Legs black; the imi'iediate tip of all the femora, tlu> i).ise of all the tibiie, and the rather broad ti]) of the front and middle tibia', the narrow tip (if the hind tibi;e, and the tirst two joints of ail the tarsi, reddish yellow; liind femora nuxlerately thickened, hind eoxie with a sU-nder sharp spur ill the male, hind tibia; without a si)ur at the tip; pile of legs white. Wings nearly hyaline, stigma brownish; thirJl longitudinal vein beyond the cross vein gently but distinctly curved backward. One male, California (Baron), and two females, New Mexico (Gaumer). Xylota pigra. (Plate XI, ljf;s. 7,7rt.) Siirijhiin pUjer I'lilirieiiis, Sy.st. Eiitoin., iv, '^'.T), Q',\, 1794. Mdfuia ])i()ra Fnliricius, Syst. Anil., llt'J, Ki; Fallen, Syrpli., ii, 7 var. B; La- treiile, Gen. Crnst., iv, ',VM. Xjilola piijra Meij^cii, Sy.st. PxHehv., iii, 'i-il, 14; Zotterstedt, Dipt. Scand., ii, 87f, 12; viii, 'M'M; Loew. Ainer. .lour. Sci., xxxvii, :?17. Milenia hamatodi'n FaliriciuN, Syst. Anil.. 11):!, i21. Xjiloia lurmatodcn Say, Anier. Kjit., i, ]il. vili; Conipl. \Vr., i, Ki; Wiedemann, AnsH. Zw. Ins., ii, '.l!>, :<; Miie(|iiait, Dipt. Kx\\s.»\, Ann. Soc. Ent. Fr., 1884, ."i4:! (Tt'iicral '). Hdhifat. — Atlantic and Pacific States, Europe ! 3,9. Length, 11 to 12""". Antennal jirocess prominent, below the uitciime receding to beyond the middle, then directed downward and ionvard. Face black, thinly clothed with whitish pollen, shining on the cheeks. On the frontal triangle, except .just above the antenme, IKillinose. Front in female shining, a narrow, lightly poUinose band iiioss the middle, AnteniKB black, third j<»iiit brownish black. Thorax hlaek, but little shining, linely roughened, with a piuiilish or bronze letlection, nearly bare, the pile very short, black, nlor(^ or less white in lidiit; on the inner side of the humeri a larg(^ pollinose sjiot. Abdomen (lark shining red, in the male u.snally more orange-colored, on the iioste- iiiir segments frequently brownish or brown, the liypo])ygium i)iceous; liisl .segment, exctejit the small hind angles, .shining black; the .second vitli a black triangle in front, its tip reaching to or beyond the miihlle il the segment. Legs black, soiiu>times more Iwownish: tarsi and knees a little lighter colored ; hind li'iiiora much thickened, in the male a little more .so than in the lemale, and with short siiinous bristles the whole lengtli below, longer on oiilev part; hind coxa; of the male nmiided below, withont spur or protiibeiance; iiind tibiie in both .sexes iitli a spur at tip. Wings nea riv hvaliiie liehind. in I'roiit and outer pair more or less bhickisli or brownish; .stigma (iiiii^er, f ^ 228 ni'LLiynx :ii, i'mtkd states national museum. Two spcciiiK'iis from CcMinccticiit, one from (Jcoifjia, iiiid I wciityllvc from Califoniiit, ^Va.^llill;;toIl Tcnitoiy, On-j^oii, and (Colorado. A sin jj.c .spccinuMi from I*r<)l('s.s()r I lik'.v's collection laliclcd ''Hundreds foinid uuder ])ini' bark in damp situation," which aj^rccH witli oltscrvatioiis made by Pcrris (Hist, dcs Insects du Tin maritime, Ann. Soc. I'nt. France, I, .\, ;Jl-'(i-;};)(), pi. I, iijis. llL'-li'J) on lOuropean specimens. Xylotn flavitibia. (I'liilr XI, li,u'. i',,) \ili()lii, s|i. nov.. Willistdii, I'roc. Aid. J'liil. Sue.., xx, lH>-2, :',->7. .\i;l(>l'! Jiaritihiii liii'ii!, Aiiii.ili's Snr. I'lnt, Vv., H-'l, .')l(i. Habitat. — Colorado! cJ . Lcnj.!:tli, IL" '". I'aee slioi t, moderately recedin;; and concave, black, rather thickly ies, and hypopyjuium shinin.!^ ^rciu isli-black: second sev\v, Uvi\tnv., v, ^{), Habitat. — Pennsylvania! S. Length, 1 '{""". Face and front black, thickly grayish yellowish . Xylota lialon Wailicr, List, etc., iii, r.")4. Xtjlota i/dO'Ir, ilatii I. Cclltl Xi/liln ninnilij'erii lii.noi, .\iiiiiili'.s Soc. lint, Fi'., 1H"?4, 54.5. H((hit((t. — Over tin; wln)le United Stiites. to H»""". I'tice much receding to considerably below liie miildle; black, itither thickly clothed with gray pollen. First two joiutsofanteniiie black, third red or brownish red, oval, longerthan l)road, tlie arista wholly black. Frontal triangle thickly covered with grayish- yellowish pollen; front of female narrow above, bright shining black, I'xeept i\ nari'ow pollinose cross-band below the middle. Dorsum of tlioiax shining nu'tallic green or greenish black, a sei iceous spot at tlu^ inner side of each humerus ; pile of scutellum short, yellow ; on t'le nu'.so- pleune longer, white. Alxlomen: fiist, fouitli, and following segments .sliiuing greenish black; second and third opacpie black, with a broad, yellow, shining, short yellowish ])ilose, intei'rnpted cross-band; else- wliei'e the pile of the abdcmien is short and bhiek, exeejtt a white spot (»ii each side of the fourth segment; in the male the yellow s[)ots are somewhat similler, iind sometimes |)artly obscured. Legs black, biise of all the tibiic ami the first two. or more usually the lirst tliree. Joints of the front and middle tarsi liiiitt veilow; the fiont and middle tibia', except tiieir has SI more veiiowisli iiid tlie iiind lar.^i, brownish, l!ie second Joint of the 1 fi'Mioni luoderatelv tiiiclu'iied. less .so in !iiii( bind tar the female: hind coxte of (he male witli a small, shari) spur below, i ■"I s • 'ii h ' tiao Itl'I.M',TI\ 31, I'MTI'K STATI'.S NATION M, MI'SKI'M. Wiii;;M nearly Iiyaliiic, only i'aintly tin.!,'«'(l witli hrowniKli nii the oiiici l»ai't. In all the eastern ,s|)e<'iinens thai I lia\e e\ainine(l tlie pile of the llm- raeie (loisuia is li^ilit enlnred; some of the westein specimens are <|iiirt' the same, Imt the lar;:;i'i' proportion of those from the Paeilie Ooast li;ivc black i»ile. In all I have examined about (il'ty specimens from .Abiiiic, New ilampshire, Massaehnsetts, ('onnt'ctieiit, Nc^w York, I'«'nnsyh aiiui, (Janada, (ieorjiia, l''lorida, Kansas, Colorado, Arizona, (California, AXasJi in};ton 'l'«'riitoiy, and Oregon. Xylota subfaaciata. Xilhiln fiiilij'iihr'iiilu l.iicw, ('('iitiir., vi, 'u. Ilohilaf.— Vu'il i{iver of the North (L\v.). J, 9. Len;:itii, s to 1>" '. Ohseiirely bronze j;reen; seciond and third se-^ment of the alxhaiien luteons, with a slender stripe and a jtosterior cross-band (that on the second narrow, on the third broad) black, lat- eral mar;:iiis lilacki>li l;roii/,e; antenna' wholly i>lack, the arista of the same color; le<;\s black ; baseoflhe IVoiit and /iiiddle tibia' and tlif first two Joints of their taisi hiteoiis; lip of the hind tibia not prodiiccii into a tooth, the an,ule helow, however, rather acute, hind coxa- of tin male air have a less acute spur at the tip. The spots of the female abdomen are less luteous, soinetinies in part, rarely wholly, me tallic. Loew, 1. (;., translation. Xylota fiaudiilosa. Xulola J'rtiudnliti^ti t.oi'w, (Jcntiir., v, 41. Jlahitat. — New York, New llanipshire, Wa.slnnfjton Territory!, Illi- nois, Wisconsin (O. 8.). ^,9. Length, 7 '. Front of tennd<; somewhat metallic green; frontal triangle and the face covered with , ilic alMloiiiiii:)! s)M)ts ;ii'c iiiurr «|ii:intin\ of l'iiiro|)i', but is ;i IittI(^ siiiallei', the pile slioitec, aiitl the arista of flie antenna' is not wholly black, but lutcoiis at the basi-." Xylota nemoriiin. Mill ■'ill III iii",-iiiii t'iiliriciiiN, Sy.st. Aiill.. llt"^, 17. • Aliliniii iijiiuvii I'lilli'ti, Syipli., 11, ti. Xijliiin II inioiiiiii MciH,.ii, Svst. il.v-clii., ili. •Jli), U ; Maciiiiot, Hist. Nat. Dipt. !1. :t: /..•tlristi !iiM. I.Mini, :!; Dijit. Sc'inil., ii, r-l\, Si'liiiiur, I'aima Aiisir., i. li.Mi ; v. d. \Viii)i, I , jilsclir. vooi' I'.iit. \x\i, Aiiiciik. Dii>t., :!. H, 45. Xijliitii hil'iii,iialii .Ml i^iiii, Sy.-^l. licMJir., iii, ,!!*, 10. Xi/liilil (/lr./-/yjr,>( /.c'tlcl'.sti'ill, Ills. l,ii[i|i., 't-v vcin vei'y obli(pie. T wo mi des (Auxer, Keen), aiul a I'eiiiale of which the head is wantinj w ' I I } \ I i( i f'r ■hi rj I I' I, ii . I I'i iVil |S ■ "h f i t ■■ ')• KIM.KTIN :n, IJNITKI) STATEH NATIONAL Ml'HKlIM. I w, Nnii' Uciti lit; O^t.Mi SacUfii, IJiill. Uuf. Sue. Nut. Xylota ouivipes. At, .Vmiali's Soc. Ijil. I''r., \'*f*\, p. ."K), JldhHiil. — New lliiinp.shiiv, New York, MiiiiicMttii, ('iilitorniii. ! 3,9. I.«'ii;'tli, l.'* to 111" ". lIciHl hliick witli a ;;l«'i'liisli icili-irtKili ; tin- Hides of ;ln' IVoiif and lact' willi wliilc pollen. Antcima' lii'owiii.sli red, tilt' aiista l»it»\\ii. Thorax ahnvc of a sliininjn' Mack coloi, with vci.v in- distinct stripes and .sparse ycll(»\v and black pile; a faint pollinose sjidt on the iitner si(h' of the linnieri ; plenne Itlaci;, with vellow uinl l)liick |)ile. .Vl»(loinen elon;i'ated, shitiin;; hliu' Idack. Leji's reddi.sh yellow (not inclndin;;' the eoxa', except a reddish .> )ot (»n the hind trocdninteis Ix'hind), the iiind femora on tlie (li.stal foiiith, the hind tibia- iJid imsi wholly, Idack ; hind femora mncli swollen anti their tibia- niiicli carved aad tcrminatin;:' in an obtnse spur; pile of the femora Ion;; and yelkiw and .III the inner .side of the hind tii)ia' thick and black ; in the feinalc the pile of the Ie;;s less abundant and shorter. \Vinjj;s distinctly tinjicd with l)vown on the distal half; sti^nina dark l)rouii. A sin^h^ male taken lu-ar the base of .Mount \Vashin;;ton, Aii;:nst i; a. female from the same Htate (l'\ II. l"'all): another from New York (Pre- lessor Lintner) ; and others from Minnesota (10. Keen, .Inly) and Cali- fornia. Comparison is yet needed of Ameiiciin and Fairopean speci- mens to determine the identity of ours with A', curripcn I.oew. Biyot in his desitription of A', satauica does not nu-ntion tho bhudc on the tipof theldnd f«'mora, otherwise his description shows no lm[>ortaiit ^i brown ; front blacV, witli some l»Iack, erect hairs. Thorax brownish bnuize color, with indistinct lonjjitndinal o'reenish stri])es; pubescence s])ar.se. short, erect, brownish y«'llow, mixed with black ; a whitish sericeous s])ot inside of the humeri ; l)lenra' .greenish black, with blackish hairs. Scntellum j>reenish bronze color. Alxlomen black, with a bluish or purplish retleetion and scat tered whitish and black hairs. Knob of halteres black, stem reddisli. Legs ferru}iinous, incliuliui;- the coxa-; the tip of unjincs brown; the distal third of the hind femora, the hind tibia% and hind tarsi black. "Willis iinj^ed wiili l)rownish, proximal lialf more hyaline; sti^'ina dark brown. "Three nniles and two females. " In {ienerid a])i)earance this si)ecies is very like the European X.fcmo- SYNOPaifj iil NORTH A.MKKKAX SVUl'IIID.K. 233 ,(tli(,\m\ it ilirt'iTH ospccially in the colnr nf llic cknh', wliirli in tlu' lat- ter art' IdacU. Minor •lillrrcnt'cs arc that in X. jVmontta tlic \vin;^s an'! iiiori' n>\vn on tlic di-stal iialt', tlic 4i;iiii!i i)al«'i', t'tc." ( >i i;;iiial dcscriptioM, conipart'il with tlu' tyj)*' sprcinicii in the Museum ,it'( 'i>mparali\(> 'A\M\\nar the humeri. Siutellum of the same color. Abdomen rather broad; tirst sej;nient l.lack, shinin;i : second sej^'ment, except two larj^c, subtrianj;ular, shin- iiiL;- bronze, whitish pilose si»ots, black, black pilose, and sub-opa(pu' ; third segment with similar spots coalescing into a fascia; fourth seg- iiR'iit wholly shining metallic, the i)ostcrior margin rather m(Me blackish ; lillli segment shiidng bl;u;k. Venter wholly scoriaceous black. Legs hlack, hind lenntra slightly thickened, base of all the tii)ia' dilutely lutes- niit, the tip of the hind tibiie not produced into a tooth, lirst two Joints ot the four front tarsi reddish-ferruginous, or reddish fuscous, hiiul tarsi wliolly black, below pallidly tomentose. Wings sub-hyaline, stigimi fuscous, anterior cross-vt'in long and much obltqiu'. — Translation. Xylota barbata. Xjllolit harlxild i.dcw, ('ciitiir.. v, 10. U (tl)ita I. —iiitkii (Lw.). 9. Length, 1(»""". Jlead broad, black, front moderately i»r()jecting. hhick ])il()se. i'Mrst two joints of the antenmc black, third blackish- hiowii, sub rotund: arista black. Face moderately excavated, white !ii)llin(»s(\ rile on the posterior orbits below white, lallier longer than Usual in Xylotie. l).>rsi'.m of thorax ol».res«>nt. Xylota eloiigata. n. ^]k Ilithitid. — Xew Hampshire, rennsylvanial, .Missli metallic black; second sejiuuMit with a si)()t in the nnddle in frcuit and the posterior part, and the thiitl segment, except a larjie trianjjiular spot on in each side in front, subopa'sliyaliiii'. sti.uma, and the remainder of sulxtostal cell brown. Thiee specinu'Hs. White Mountains, Auj/ust 1, Missouri (Theo. Tfi ;4 inde), and I'ennsyK ania (11. L. Keen). The coloi' of the le,iis ])re\"eiit-; the identilication of this species with r.i;j;ot's X.»irt(iJJil'( ra. Xiilofa ilm''- J'roii' W'alUer (List, etc., "u), uiay possibly be this species, but iIh' antenna' ar<' not darlv lerrn^ihous. The len,uth of the abdomen. ;i^ Walker descrihes it. ••alidoaien lint ar, a little narrttwer than ilic che-^t, and fudy twice as Ion;;," applies better ti» this than to the allied species, t:' :UM. w holly .sitvi I 'ililt'. \f]\ I he 1 \V(» inl. scia, hut 111- norii at iji,. tl'dllt tihiii' lie liiNt t\\,i , liasal li.ili r the sccdiiii liltlf thick itorv, ami ;i !(■<(' (finale- ale tile cup ■oss-haml nt not a|i|ic;ir >:\\u\ on ilic si(h' of thr SYNOPrilS or NOKTIl A.Mr.RtCAN SYh'rillD.E, 2:5r> I. lack, |i()i!i 11, iii;'''()uh ack.ollipii lat inctallic IS. Ph'ni;c \nu<^ l)lni>li I iVont ami iifj^nlar spot (»n tlio pus lie iiH'tallir ip aii i'jllofK Jlnri- 's, but llic idorucn. :i^ I ilic clic-;t, (1 species, Xylota AnthreaB. Xiiliilii .liilliiciin Wiilkfl', i.ist, etc., iii, 'wCi. Ildhitdt. — Ni'W di'i'si'v (Walkci), New IIain])shin' ! :. Iit'n,utli, !*""". I'ronr nairow alxivc, shinin.L:: Iihick, whitish jiolli- iiosc ill the iniddh' and on the sides heh»\v. Antenna' black, third ioiiit sidxinadrate, rechlish brown; aiisla liiteoiis at the liase. I-'ace black, wiiitisli poliiiose, exce])t on tiie cheeks. Thorax shiiiin.L; lilack, sonie- wlial metallic; p;h^ slitd't, appiessed, li^iil colored; humeri sericeous ]),)llinose; |)leura' black, shininu, li;:;litl,v iiollinose. AbdoiiieP black. Iiiit little shiniii.u'; lirst and I'.Mirlh sejiiiieuts shiiiin;;-; second, third and liiuith se.uiiieiils ea 'ii with a lar^'c, siibtriaiiuular, shiniiiu' iin'lailic. white i>ilost> snol on each side, those of the iliird narrowly se])arated, iliose on tiie hunt ii coiitluent. la'u's black, white pilose; I he iiniiiedi ate tip of tlie fe:;i()ra. and the liase of all the tilme. the tips of the lour front tibiii', and the lirs! liiice joints of their tarsi, yellow; the tip o, the hind tibia', ami the iiasal Joints of theii' tarsi, fuscous yellow. Win-.- nearly hya.liiie; sliLiina luleous. One sjiecimeii. New lianipshire. Differs from A. (■l(ni;/s(im( in liie front of the fi'iuale bein^i iiar n)\vcr above, the four front tar- i lighter yellow on the basal joints, am! ill the base of the arista bciii^' liiteoiis. Xylota nietallica. Xijl >l(i iiiclallicd \Vit'(l<'iii,inii, Aiiss. Z\v. Ins., ii, 102. ni1«t. — (leorjuia (Wied ). Tliorace a'lieo. abdoiiiine iiii;ro; luacnlis (piatuor niagiiis qnadratis luteis. Mit eizuriineiii Kiictkeiischilde mid schwarzein Ilinierleibe, uiit vicr lii'osseu vierecUi«;en i:('lbeu I'lecken. — .'5 ,' Linieii. Fiihler ocherbraiin. rnler<'('si>;ht nietallisch schwarz, weissschim- iiHTiid. Stirn schwarz. lAiickeiischiid erzjniin, mit vit'r selir schwach kiipferr(Uhli(;lieii Strieiiien iind weissschiiiiineruden Sclmltern. IJrust- M'iten sidiwiirzlicii, mil b;eiter weissscliiinnieriKU'ii IJiiide. iSchild- chcii erzji'nin. Iliiderleib schwarz, zweiter utid diitter Abschnitt Jeder aiijeder Soite mit eiiiein jjrossen, 'tli di tli(! sides, ill sonic ic licctions oi)alescoiit; the black interval betwccni flic spnts slender; fourth segment wholly metallic black. Wiiij^s ainl halteres yellowish; stigma liiteons. Legs reddish yellow, a little whit isli pollinose; hind femora thickened, blaek, with a reddish yellow 1p;isi;| till of the anterior femora bri;wn: posterior tibia', and the tij) of all tl tarsi, brown. — Translation. The sex is not mentioned. The species must resemble A'.. />'aj<(/«/o.v(/. | but has mncli lighter-colored legs. Xylota metalJifera. Xi/Iohi iiKldUijWa Bi.uot. Aim. Soc. Ent. Fr., 18H4, 545. Habitat. — Colorado. i. Long. 10""". Tota cinert'o villosa. Antennis castaneis; frontect facie albis, geiiis et tacie. nti iiuine, snperne nigro pictis ; thoracc et sciitello obscure a-nesceiit ibus, i hci ace obscure chalyl»co vittato; cajyji- tils albis, halteribns testaceis; al)domiiic nigro o])a(;o, segmentis seciiii- (lis «'t t(Mtiis, utriiHine, li,\ .icintho notatis, (pnirtis et (|nintis similitcv tinctis; jiedibus nigris, loiiiTc. sat dense-, albi«lo villosis; alls fere liya- li'iis, macula stigniaticab jiall'de fiisca. ('orps eiitiereiiient convevt de longs ])oils gris, clairsen'cs ; factM't front blaneliaires. les Jones et les cotc's. ])res des antennes, a rcHvts iioiratres: thoi'ax d'nn noir bi'onzc. obscnrc'-meiit marque de baiuU's bleiia .'es; eensscii de mriiie coiilcur (ine le thorax; cnillerons blaiics. balancieis testacc's; abdomen dim noir o{)aque, -"^ et ;^' segments, de ciKKine cot*', avee uiie niacuh' ovalaire allong/'e, la base des 4^' et 5*^ sej;- iiients, d'nn bleu metalli(|ue; jiieds noirs, cuisses couvertes de iioils blanchatres ciairsemes; ailcs presipie hyalines, un jieu roussatres .sin !« s nervnres tiansversales ainsi (pi'au stigmate. 1 sj)eciin. — Bigot, 1. 1'. Xylota coloradeusis. Xiilolu vohirdihusiK IJi^^ot, Ann. Soc. Ent. Ei., 18^4,1)41. Ilahitat. — Colorado. i. ]>ong. 10""". Antennis ol)scni'e te.staceis; fronte et facie ciiiercd albido; thoi'ace sciitello(iiie obscure a'nescentibus; calyptris alhis. lialteriims testaceis; abdoiiiine, segmento 1", \" et 5" nigris, '6'\ i" et •"." Ilavo anguste marginatis, L'" et .'!" iulvis, ."5" et 4" macula liit;i, ntrinque iirol'nnde bilida, .'5" vitta niediaiia, retrorsum dilatata, nigris: ]M(libiis nigris, geiiiculis fiihis; alis hyalinis, macula stigmaticali lestacea. -Vntennes (rim fauv« obscur: iVont el lace converts d'uue pruinositc iilanchatre: thorax, ('•riissoii iioirs avee (piehjiies rellets bronzes, «''paii lis blanchfiti.'s; (tuillerons et balaneiers testaet's; c()rp.s convert d'tui tics fin dinet clairseiiK', J.mnatre ; abdomen avee les 1'', 4'' et -V' scu- nieiits noils, ;;'•, 4'' et ."i'' fin-iueiit l>o!(h's de Jaime pale, 1!'' et ■V' d'nn Jaiive idiigeatre, .'I' avee line large baiide mediane noire, profoiideuieiir 1^^ SYNOPSIS OF NORTH AMKRICAN SYHFIIID.K. 237 liitiile inti iiioic tlii(;kly <-!ollu'd wirli piK . A])doin»'n b!aclu.-.ii .steel blue, some- limes more l)roiize colored; .second se'^'nient wirli tw(t oblonj^' biteoii.s >]i()ts, not attaining: the inaruin of the segment, laiely ob.solele; iVont, liiiir of the liiinl .■-eminent sliinin;;-. .sonietnnes with two small iuteons s|iors, posterior pa it black and snltopa(pie: the iollowinji' seuinents 'vholly sliiniii";. blaeUisJi sleel-bliie. larely hlacldsh l)r<>nze; \enler !ule- iiiis. last sejinients metallic. l'\>]nora blackish steel blue, the hind pair nnaikably Thickened ; front and middle tibia', exee])t the wiiitish base, iiM'iais black, hind ])air, except the whiti' base, iilaclc, si ronj^ly arcuate, produced into a tooth at the tip: Iront taisi whitish, hind tarsi black- ish luscous, t)ie last two joints of all black, ^^'in^s blackisii cineieous. stiuina fus(;ous. Xylota pietiosa. Xilhitii jircliima I.ocw, W'ii'u. Kiu. Moiiiilsclir., i, :V,I ; ('I'liiiir., vi, ')'.\. llal,it,(f. —Cnhix (Lw.). -. ben<;th, 10 '. Lig'lit jireen-broiize, very shining' ; abdomen stecd- hliie. with four lijiht yellow s))ots; tiie I'ront and middle tibia' and liie hasiil third of tJje hind libiie. and all the tarsi, exce))t the last three juiiits. whitish yellow. i'ace i^reenish brf)nze, wiiite }iolliiiose. .\ideiina' black, third Joinr >iilirotund, arista of the sanu- color. I^'ront greenish bron/.e. white pol- hiKise. \'ei'li(;al triaiiji'le uarrow, jireeinsh steel blue, shiinufi', s|>arse!y hliick pilose. Ocelli remote Iroui the occipital mar^^in. TUorax vei'y hulit .urecinsh bronze, near the Iiiml mar.ii'in somewhat steely blm-. o'l (M( li end with short white pile, between the wind's clothed with black. Scu'elhim steel blue. Abdomen li^lit steel-blue; second sej^nient wi;ii two ])alliH 1^' I I, ,i (i I'M'' 'X\ li'Ll.KTIX ;!1, UNITED STATES NATIONAL MUSEUM ,\i'IIi)\v .spots, luniiiiij; a broadly iiiU'iruptcd las(;ia, bcliiiid \]\vm} sjiots l>l;ick violacco.is, t\w. i)o.stinal cell open. Ihiid lon.uitudinal vein bent jicntly into the lirst posterior cell, last .'^ec- lion of fourth vein .u'ently siiiiMte, anterior cross-vein obli(piej joiiiiiiii' i!ir I'oiirtii vein beyond the middle of dis<'al cell. It seems very probabU' tliat Acroclioydoiiodfs lJi;;ot is but the fcinale of a true Scuoi/iister. The chai'acter in whicli this f^enus, founded upon a female specimen, is said to dilfer, is juecisely wiiat mi;:;ht be expeeled ill that sex, viz, a less contritcli <1 abdonu n. 'i'he ty])e of Senofiaster is *S'. cocritlcsccnn Maccpiait (1. c), from Cayenne. South America. •.rfyoS, sIcikUt; ycxdn'/fj, abdomen. jeiiogastt Si: til) IhthitK i . Le liie midd iiiu'le bl;i \c!low. lare; d( ■listant. • inldish, uliere it V'lidouu' iilack, y( AJde bel ;iiar;j;iii ; ill front, ;!s the pi |iy,uiiim ; ishldack line. One SI .Macqu the i)r('st iaeiition( irvation 1878, fen Mia to o Sjiri Cop Kathe aiu's. II !lie thoi -mall, s lives bii M'l'tellui riacled \ I'roiit ai iiaiily tl filial ce near the Liir.ie). SYN0Pf'« ; of \viii,u, S""". Face yellowish, blackish towards iiic middle, and covered with silvery white i>nbesceiice. Frontal tri- iiiyU^ blackish, whitish near the eyes. Antenna' yellowish-red; arista \('!low. Vertical triangfle oi)a(|iie black. Thorax black opa(iue, Jiearly jiare; dorsum with four conspicuous olive jj-ray stripes, nearly iMiui- ilistant, the lateral ones reachini;' iVom the yellowish humeri : pleune 'rddisli, dusted with whitish, especially on the meso and .sterno i>leura.', where it forms a. conspicuous stripe; scutellum with a yellow margin. Alxlomen blackish-brown ; tirst sejunient as broad as the thorax, nearly ohick, yellow on the sides: second seiiinent elongate, scarcely half as Aide behind, with two whitish elonjiate sj»ots, '.utt reachiii};' the liiiul ;iiar;jliii ; third segment of the same length, narrow, (cylindrical, yellow in front, narrowly above, luoadly on the sides; fourth .segment as long iis the preceding, expanded ]>osteriorly, I'ormirig with the globular hypo- |iygium an ellipsoidal mass. Legs reddish yellow, hind femora browu- isli black on the basal half; hind tarsi brownish. Wings nearly hya' line. One speiiimen (Piof. J. 11. Comstock). Macquart's descr'ption and ligiire of S. coentlcsccHS agree quite with the present species, except that the conspicuous thoracic stripes arc not iii('iiti(tned nor indicated. Was tiie si»('(!i!ii('n he described in good pres- I'l'vation? Bigot's Arrorhonloiiodcs viftatiis (Bull. Soc. Eut. France, 131, 1S78, female) ai)plies very well indeed. Is it possible that they all per- MJii to one widespread sjx'cies .' SYUITTA.* SiirUta .St. Fai-KCiin and .'^crvilli', Kiicycl. Mctli., x, 808, 1825. Copriiia Zi'tterstc'dt. Ins. l.;!)!]!.. r>>;4, HIO. Kather small, slender species, nearly bare, Idack, with yellow mark- iius. Head hemispherical, not at all flattened, sonunvhat broader than Hie thorax. Antenna' short, third Joint round; arista bare. Face 'inall, snbcjariiiate, nearly .straight, epistoiiia but slightly ]»rodiu;ed. lives bare, very hirge, coiitignoits in the male. Thorax rather long, Mi'tcllum thin on its edge, dark-colored. .Vbdomen slender, more con- riaited in the male, about twice as long as the thorax, and not wider. Fi'oiit and middle legs slender and small, tlie hind femor.i extiaor.li- iiaiily thickeru'd, with slnu't rigid spines below ; hind tibiie bent. Mar- ■/uvA cell of wing open; viiiid vein gently cnrved ; anterior cross-vein iii'iU' the middle of di.scial cell lectangnlur. Typi! of genus, S. pipicn-s UnwC). n I ' 'V * 2iiiJi^fty, to luim. ; 1 ! i I I, J) f 1 t ', ' 1 i 1 1 t i'' in l! m w 1' 240 i;ii.r.i:Tix si, ixitki) statks national miskum. Syritta pipieiis (I'ljiti- XII, li'.s. 1, ]ii, ]h, I !■). AIiincii ii'ijiidin l.iiiiu'. J'.iiiiin SiucicM, |i. \> fi, l*(il : S(Iii',iiil<, I'liiiiii. Insiet Aiislr., !l|.'.. rri/K/y/.f y;/y//('».s S< iijKill. I'.lllnlil. ( 'll I'll inliiJI, W>\K Siirphu:! jt'iiiiiiiH I'liliriiiiis, Sjicc. Insi ci., ii, l;!l. (Ifi: i;iil(>iii. S\hI., iv, olO, ll;(- I'iili/.ir, F;iiiii;i (icnii.. Nwii. '.'(I. Mihsiii FmIiH Sv.sl. A;iil.. I'll. Fallen .tmIi.. !•' 'J. Cojiyiiiii jiij/'u'iis '/.i{\i'if.l.'i\\. Ins Lull A'(//o/ i( /iiiifCiis I Ii'i'ji'u if:>iMir., Ii -I. i:.. ii;!, 1. A/iJom jiid.iiiiiii S;iy. Ann r. I'.n!., i. ul. v iii : ('itmn Zw. Ins , ii. II)-.', II. Surithi jii/iiiihy M,-i(i|ii,;i I . lii-i.X.il. Iiipl.. i, .'>.;."> , \\i-.. i. It;-. Wi-d • ■niann, An I : M. -en. S\,-,|. ln'SI'lll'., \ ii ll;;, pi. Iwii. 11-. Jl : /.Ml Dinl. ii. ^-1. 1 ; \ iii, :;il):i: Si ■!■, \ 'it. (i ii. Iv: 1 ; I'':iiiiia All -1 r,, i. >. >> Hdhlidl. — Tlir<)ii,ul)out til- Liiitcd Stiitcsl, l^iirojic, Asia, Alrica. (? 9. LciKitli, 7 lu.S" , !■',;;•(' :;ii s])ols; tlic liuint'ri ami lu'liintl (Ik'Mi, icacliiniv to tin- sutmc, ycilowi.sji wliitc iiollinu.sc. LMema illicitly vliilisli |)o]linos( . .Mitionifn in tlu' malt' as t\)ll(»\vs: i'.lack, lirsr tliivc s(',:;in('nls ojikjuc, flic lomtii and tiu^ liyi»()i>yyinm .sliiniii;;; tiic narrow sides- <,(" ||i,- {\y<{ scjiinctit, and a broad si)ot on cacli side n\ t'acli of tlic two followiiiii' s('<;nH'nts, ytdlow. ol'ti'ii wliilisli ]iollino.sc: foiirtli so^nicnt ii> fr(»nt w tli a narro.v intcrrnidi'd yollowisli wliiti pollinosc cross-l)aiid, tiu' bind margin of Ibc sejiniont iiari'owly yellow, III tlic female tlie spots smaller, (be sides of tlio tliird sei^inent in front nietallie, scai'cely at all yellow, but with a li^rbt ]»ollinose spot: otliei wise like (be mal "(Mir front Ici-s s eliowisb red, witb ol)seiire brown isli 'narlase and a usually incoiii )»lete riiiu' near tlu' middle, I'eddisb yellow; bind tibia- reddisli yellow. at t'le middle and tip brown or black: bind tarsi rcddisb yellow, iiioiv or less brown on I be ujiper side. \Vin;^s liyaline. The most common species in the fa^iily, everywliere and at all times alunxlant from sprinij' till auiumu. ADDIJIOXAL X0L"JI1 AMKK'U AX .SPECIES. Xylota Mexicana ni,!;'(it, .Vnn. •"ni, i'r,, I--I, 5;!',). — Mexico. CIIUVSOCIII.AMYS.* Fcrdiiii'iidca IJiindiiMi, Ann, c'rilc .Siicnyi- .\al. di liolojiiiii, 1844. r//;-//Mi. /(/((/(lix Il()ii(i,-iiii in lilt.: W'nlki-r. Iiist-i-t I'lrit.,!. 'Sii>, l~."iL Moilcrati'ly !arj;c species, metalli<'.-!Li-oldeii or bvon/egreeii, witb lij^lit- colorcfl pollinosc stri|)cs on the doisum of the thorax. Ilead lieinis- pherical, .somewhat bi'o;ider than the thorax. Antennae short, third X/jvOo', ui'l'l ; .Y'^'V"!--. a niaiille. SYNOPSIS OF NORTH AMERICAN SYRPHIDiE. 241 joint rather larjie, obli(iiiely ovnl or rouudod, arista naked, basal. Face gpiitlj' concave in i)rofile below the antenuie, with an obtuse tubercle near the middle. Eyes pilose, contiguous in the male. Scntelluni large, yellowish, translucent, its bonlei- and the lateral benders of the thoracic- dorsum with macrochait.e. Abdomen not much longer than the thorax, elliptical, thickly pilose. Legs slender, the hind pair scarcely elongated. Marginal cell of wings open, the third vein gently concave into the tirst posterior cell ; anterior cross- vein near the middle of discal cell, oblique. Type of genus, C aurea (Scop.) Walker. TABLK OF SPKCIES. 1.— Hind l)orders of the second and third uhdoininal segments black, opacjue; arista reddish 2 Hind borders of thesu segments not opaque black 4 2.— Face in the middle with a V-shaped black spot 3 Facial spot indistinct in outline; front femora at base and the tip of all the tarsi black buccata, 5 3.— Legs reddish-yellow dives All the femora brown; tibiae likewise infuscated nigripea, ,? 4.— Facial spot V-shaped ; arista reddish nigripes, 9 Facial sjiot indefinite in outline; arista black crcssus Chrysochlamys crossus. Chnjaochlamiin crcemiti Osten Saokcii, Western Dij)tera, 341. Habitat. — Utah ((). S.), California, Washington Territory, New Mexico! 9. Lengtli,(Sto 11""". llesembles C.tl ires close]}-, but theabdomcn lacks the snbopa(iue hiinl margins of the si-cond and third segments: tlu' pile (if the abdomen is longer, the general form broa rhninochliiinnn divcn Ostcii Sacken, West. Dipi.. :i41. 7/(f/*(7r'^— Illinois, IMissouri, Canada I Kentucky (O. S.). c? , 9 . Length, 8 to 12'"'". Face largely covered with ochraeeous pol- Ii'ii. in the middle with a larj^e V-^liai>ed black spot, siiiuiug; cheeks ^liiiiing, in front with a narrow black strijje. Front of female shining i'lack, across (he middle with a !)i()a(l ochraeeous pollinost! band. In the male the frontal triangle is black, shining above the base of the iintenna' only, pollinose along the eyes: tirst and second joints of tlie iiiitennie blackish above, reddish below, the third joint dark brown on ir I ; •.■* 'V] 242 mi.LETIN HI. UNITED STATES NATIONAii MUSEUM. tilt' upper lialf or two-thirds, yollowish-rcd below; the arista reddish. Thorax beset with bhickish or hitesceiit pile, lateral margins and a stripe of even width eaeh side of the middle, iMuereous poUinose; bri.s ties black; scutellum liitescent or yellowish, with short yellow pilf, Abdomen pure bronze-eolore*!, densely beset with short jjolden -yellow pile i!i the female, somewhat darker in the male; the black siib-opaquf hind borders of second and third sejjments sub-interrupted. Lej,'s sat- urate yellow; the last two joints of tarsi inluscated orblackisli; the four front fj'inora (male ?) may have a blackish. Abdomen shining, with short lutescent pile; hind margin o; first and second segments oi)a(iue black. Legs ochraceous, the basal half of the four front femora and the tip of all the tarsi black; front tibiic, except the base and tip, and the base of the hind femora, sliglitlv subinfuscated. V.Mngs somewhat cinereous hyaline, lutescent near tbu base; costal cell ;iJid stiguia luteous, the base of the third vein and tin cross-veins at the middle of the wing clouded with black. — Translation Chrysochlaniy.g n; gripes. r/iri/so(7i/a»i.v< niijrijjes Osten Sacken, Wo.st. Dipt., 341. Habitat. — Mas.sachusetts (O. S.). " ^ , 9 . Length, about Of"'". General color much duller than in C dives, metallic blackish-green : pollen on the face and front dull yellow ish; frontal pollinose cross-baud (9) much narrower, and hence tk SYNOPSLS OF NORTH AMl'.RICAN «YKPHIl)^E. AS : reddisli. [18 and It ;)se; bris- How pilf. en-y<'ll()\v ll)->)l»il(iue Lt.'j,'s sat- kish; the . \Viii,u> liiR' alouM \vu cloiitl, :liir(l vein L'ior ci'o.s> owles). out black, mfc black ck stripe. V, shilling;, 1 of ochni- econd and Face 10 'I e, swolk'ii iteks sc]! of thorax iiyitiidina! dish, witii al roriior^ nuu'^iii (t! tlie basal ack; front a, slis'htl.v it near the in and tin- ranskitiou than in C ull yellow hence tk black shininj,' upace above the iintcnnii; lar;rer. The pl•(^vailinJf pu- bescence on thorax and scutelluni is black; black, opaque hind mar- gins of the segments two and three in the male only, not in the female. Femora brown, except the tip; tibiie brownish yellow, more or lens in- fiiscated befo'e the tip, especially the front pair; tarsi brownish red at base, brown at tip. Winfjs {,'rayish hyaline, feebly tinned with brown- ish yellow at the root and on the sti^nna; costal cell sub-hyaline in the female; brownish clouds on cross-\«Mns very weak." — O. Saeken, 1. o. MERAPIOIDUS. MerapioidHH Uij^ot, Hull. Soc. Kiit. ilc I'liiiici-, 187H, »i4. Large, pilose species; black, with metallic bands on the abdomen. Head subtriangular in front view. Front of female short, but little inclined, nearly plane, moderately broad. Antenna;: first joint slender, t'vlindrical, about three times as lonj,' as the short second Joint ; third joint very broad, short, in front slij-iitly (toncave, below tln' in.sertionof second Joint ])rolonged downward, obtuse; above extended into a coni- cal point, slightly convex on the upper posterior part and terminating ill the arista, which is a little thickened at its base. Face extending downward, not descending far below the eyes, obtusely conical below, gently concave below the antennae, and with an obtuse tubercle. Eyes bare. Abdomen depressed, broad, elliptical. Legs simple. Wings: marginal cell open ; third longitudinal vein nearly straight ; last sec- tion of fourth vein slightly sinuate. Joining the third before the costa; anterior cross-vein oblique. Joining the tburth vein near the outer third of the discal cell. Type of genus, M. villosus liig., Jforth America. MerapioiduB villosus. (Pliitc XI, li;;s. •^, Ja.) Mernpioidus villosus B\ I'l 1' -' 244 nULLKTIN 3], UXITKI) STATES NATIONAL MUSEUM. metallic, lit'fjs black, with white i»ilc; fcmoiii at tip, aud tibise at batse anil tip, reddish. Winj,'8 hyaline ; subcostal cell from tip of auxiliary vein yellowish ; cross-veins faintly clouded. One specimen which agrees sufliciently well with BigofB description of male and female. fv Ml ! I* • SPILOMYIA.* iSpi/om.virt Meii^cii, Illint'r'H Miififi/iiif, ii,"J7:!, 180;^. MUtf.myia Macquart. Hist. Nat. Dipt., i,491, IhlM. CalUprohola KoiKlaiii, Dipt. Ital. Prodr., i, 47, 1856. liiirye robust .sjx-cies, black with bright yellow spots or bands on thorax and alulonicn — wasp-like in ajtpearaiice. Hea«l hemispherical, broader than the thorax. Anteniue porrect, moderately or considerably elotigated, the third joint usually rounded, not twice as lotig as broad; arista bare. Eyes bare, contiguous in the male. Face nearly vertical, gently concave in protile below the antennas only a little tnbercularc below, if at all. Thorax short and broad, considerably convex above. with yellow spots. Abdomen twice or more as long as the thorax, veiy convex above, usually of nearly equal width throughout, sometimes gently <»•• broadly oval; with yellow bands. Legs strong; hind femora elongate, with a ])rojecting tooth below near the outer i)art. Wings brownish in front ; marginal cell open, third longitudinal vein nearly straight, tiie vein beyond the tij) of the anal cell is continued outward, nearly parallel to the hind border of the wing. Ty])e of genus, (S'. diophthalwa Linne, Euro))e. TABLK OF SPP:CIES. 1. — Second joint of anttMuiM' mncli lon;^*'!- than tln' lirst ; second Hc^inciit ot'tlic alido- int'M will) a Inoad arcnatt! yellow l)and, the tliiid !im<1 foiiitli witli a slrn- dcr. median interrn])teil one qi7adrifasciata .■^eiond Joint of llie anteim.'e not nineli loni;cr ilian the first; alidoinen not mi marked 2 2. — Abdomen yellow; first Mefjment, exeei)t the lateral angles, black, each of flie t'ol lowing segments with two narrow black bands, t]fe one on the anterim- m.-irgin entire, the others int«Mrui>f ed hamifera Abdomen black, with yellow cro.ss-liauds 3 3, — l''irst and si'cond abdominal segments wholly black, third with a posterior crnss- band, fourth with two, the anterior one interrnpted ; abdomen broadly oval fusca First segment with a yellow side spot, the tVdlowingeach with two cross-bands, 4 4. — I'irst. third, and t'.fth cross-bands interrn|)ted (or snb-internipted) the latter twc distinctly dilated on the sides 5 First aii' yellow across tlu' middle ; sciitellum with a yellow, disconnected spot en each side liturata • 2'n-(7,of, mountain : ,uvia, fly. i". 'U SYNOPSIS OF NORTH AMERICAN UTBPHID^. 245 I* ' 9 Spilomyia longicornia. Spiloinjiia longicornin Locw, Ceutur., x, 49. Habitat. — Illinois, Pennsylvania, District of Columbia, New EnKlaiuIl, Texas, Kiiuaas (O. S.) 3,5. LtMifjtIi, 1 1 to 13'" '. Eyes of miiK? eouti^'iioiis, vortical trian^xle on the upper half black, Im'Iow yellow; froiktal triaufjle yellow, with a large triangular black spot above the antenna}. Front in female yellow on the sides, with a black strii)e broad below, attenuated above, vertex Itlack. Antenna' l)rownish black, sometinu's partly, neverwholly, brown- ish red, first two joints somewhat elongate, arista luteous. Face yellow, with a median stripe attenuate above, and a narrow stri|>e from the eyes to the oral margin, on the (dieeks, black. Thorax black, humeri, and a rounded spot to the inner side, a /\-shaped sjjot in iVont of the scutellum, aul)ot above the suture in front of the root of the w ings. IMeurje with tive yellow spots beside the humeral and sub-alar ones; an elongate one on the meso pleura^ and one below on the sterno-])leura>, one just above the anterior coxie, one on the i)tero i)leurie, and a broader one behind, iu'Iow the tegulte, the three latter nearly coalescent. Margin of scutel- liuu yellow. Abdomen black opaque, second, third, and fourth seg- ments each with two narrow ellow biuuls coniUH'ted by the yellow lateral iuirgins; first band dilated on the sides, the third and fifth usually very narrowly interrupted. lIypoi)ygium yellow; in the female the tifth segment black, with a narrow yellow border. Legs yellow; trout tibite except the base, and the front tarsi, black; hind femora sometimes darker towards the end ; apex of hind tibiiP and the tarsi (M'hraceous. Wings sub-hyaline, in front brownish ; last section of sixth vein nearly as long as the posterior basal cross-veiu. Spilomyia liturata, n. .sp. Ilahifat. — New Mexico ! 2 . Length, 14""". Antennte brc/wnish red, elongate ; first joint as long as the third, second joint a half longer than the first. Face bright yel- low, with a slender black striiu', not reaching quite to Hie antenn* ; tiont like the face, in the middle with a black stripe, broader below, very narrow just below the black vertex. Dorsum of thorax nearly opaque black, with bright yellow markings, as follows : a spot on the liiuneri, and one of nearly the sanu' size on the inner side of each, i)ost- ahir callosities, extending as a slender vittula forwards, the anterior tiid of which is curved inwards, a spot on each side of the scutellum. a large oval spot on the meso-i)leur.TB, a smaller rounded one below on the sterno-pleurae, one of about the same size on the sides of the metanotum. and a smaller one above the front coxae. AbdonuMi nearly opaque black, with two yellow cross-bands on the second, third, and fourth segments; the first cross-band of each segment is rather broad, strongly dilated on t' I 'I IMAGE EVALUATION TEST TARGET (MT-3) % A i /. ^ ,FET WEBSTER, N.Y. 14.80 (716) 872-4S03 iVV^ 1*^ *% o^ !«'l 246 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. the sides, aud only sub-interrupted in the middle ; the posterior margins of the second-fifth segments with the bands of equal width thioughout, not interrupted. Legs yellow ; the four hind tibiae at the tip juul their tarsi reddisli, the front tibiae, excej**^ the base, and their tarsi black; hind femora broad'y blackish on the posterior side. Wings with a brown anterior border, nearly hyaline behind. One specimen. New Mexico (G. V. Gaumer). The present species is nearly related to longicornin and interrvpta, but is at once disti'iguish- able from the former by the longer antennae ; from the latter by the au- tennae being a little longer, by the abdominal bands 'jeing entire, or not distinctly interrupted ; from both by the spots on the pleurae, and the greater width of the abdominal bands. Spilomyia interrupta. (Piute XII, fig. 4.; Spilomyia interrupta Williston, Proc. Am. Phil. Soc.,xx,327. habitat. — Washington Territory ! 9 . Length, 1,'J to 14""". Closely allied to longicornis, but differs in the bauds of the abdomen being a little broader, the first, thini, and fifth very distinctly interrupted, and the t:vo latter more dilated on the sides, in the fifth segment in the female being in large part yellow, in the presence of a small yellow spot on the sides of the dorsum above tlie meso-pleurje, in the spots of the jdeurse being smaller and distinctly sep arated from each other, not coalescent, and in the antennae beinj; :i little longer. The cheeks are ther spots, only one, elongate spot on oach Bide 3 3. — t'emora mostly yell<)w ; the distal part of the abdomen with broad yellow cross- bands leaving but very narrow black cross-bands 4 All, or at least the front, femora broadly black ; the black interrupted cros.s- bands of distal portion of abdomen broader aequale 4.— Scutellimi, except the base, densely yellow pollinose pictuliim Scutellum, except the baise, shining metallic excentricum 5. — Second segment of abdomen with a broad anterior cross-band, distal segments with three transverse black spots altemans Second segment without nnterior cross-band, distal segments with a broad inter- rupted black cross-band ; pile of scutellum black venustum TemnoBtcma bombylans. (Plate XII, tig. 6.) Mihsia bombylans FaV>riciu8, Syst. Antl. , 189, 8 ; Panzer, Fauna, viii, 11 ; Meigen, Syst. Bes(!hr., iii, 5>:<3, 15 j Macquart, Hi oro8 /}fl/.iyra« Walker, List, etc., iii, 577. Spilomyia bombiflans Schiner, Fauna Austr., i, ;J65. Temnoatoma ohsciira Loew, Centur., v, 35. Temnontoma liahjraa Osten Sacken, Cat. Dipt., J38,2.'J3. Habitat. — New York, Connecticut, White Mountains, Pennsylvania! cf, 9. Length, 10 to 11 "". Face black, shining, covered with dense yellow pollen on tiie Hi«le8; cheeks bare and shining black. Frontal triangle black, clothed with yellow pollen, except above the antennae. Eyes in the male narrowly separated. Front in female lightly pcyllinose on the sides. Face of male usually with a slight convexity in the mid- dle, sonjetimes, however, (piite straight or even gently concave through- out, as in the female. Antenna? varying from light yellow to quite brownish. Thorax nearly o|)a(|ue black; humeri, the suture on each side, a snuill spot above the wings, sind a vittula in the niesopleurae. thickly yellow pollinose. Abdomen black, but little shining, of nearly equal width throughout, a little oval in the female ; the second, third, and fourth segments (in the female the fifth also) with a complete yel- low band, moderately arcuated, the convexity approaching the front margin of the segments ; all of the bands n)argined with opaque black. SYNOPSIS OF NORTH AMERICAN SYRPHID2E. 251 Hj'popyRium shining black. Front legs black, immediate base of fem- ora, knees, and base of tibia), yellow ; middle and bind femora black except base and tip ; bind tibiae usually with abroad blackish preapical ring ; tip of middle and hind tarsi frequently blackish. Wings hyaline in front, towards the base more reddish, beyond brown. Twenty-five specimens, mostly caught about blossoms of Cornus psm- iculata in the latter part of June. New York (Professor Gomstock), Pennsylv.'S'.iia (Keen). In his description of T. ohscura, Loew says : "AT. bombylanti, cui KJniillima, fact'i tuberculo niinuto quidem, sed manifesto differt." But, unfortunately, although the facial tubercle or convexity is not incon- spicuous in some specimens, in others it is absolutely wanting. From this fact, and because they agree throughout with the descriptions of the European specimens, I must agree with Jaennicke (Neue Exot. Dipt., p. 4) in considering the species the same. TemnoBtoma pictulum. Habitat. — Pennsylvania ! 9 . Length, 12 to 14""". Head black; face and front thickly clothed with golden-yellow ])ollen, a medi.an strii)e reaching from the vertex over the base of the antennae to the oral margin, and the cheeks, bare, shining. Antennae wholly light yellow. Thorax black, with bright golden pollinose markings as follows : A spot on the humeri, an inter- rupted baud on the suture, a large oval spot in front of the post alar callus, two spots of about the same size as the last in front of the scu- tellum, nearly confluent, the scutellum, except the base, a spot on the meso-pleurae and one on the sterno-pleurae. Abdomen golden-yellow opaque ; first segment, the anterior margin of the second, and the very slender front margins of the third and fourth, a cross-baud on the mid- dle of second segment, not reaching the margins, similar, but success- ively narrower ones (almost linear on the last), on the following seg- ments, black. Legs yellow ; front tibiae, except the base, and front tarsi, deep black. Wings brown along the front border, sub-hyaline behind. Two specimens, Pennsylvania (Mr. Eugene L. Keen). Is most nearly allied to r.eajceH^ncMW, but the scutellum is golden pollinose, not shining; the spots on the thorax are larger, and there are two separated spots in front of the scutellum instead of one triang-ilar one; the median black bands of the abdominal segments are not distinctly interrupted iu the middle, the front of the female is broader above and the insect is smaller. TemnoBtoma excentrlcum. Mileaia excmtrica Harris, Insects of New Eng., injur, to Veget. ; Osten es,oken, ibid, Urd ed., 609, fig. 267 (male). Temnoatoma exceiitrica Oaten Sacken, Cat. Dipt., 138, 253 (male). Habitat. — Massachu.setts, Tennessee!, Illinois (O. S.). II ) 'fj II m' ! ,1) ii r r 252 BKLLETIN 13, UNITED STATES NATIONAL MUSEUM. 1:1 I?' 9 . TieiiKth, C"""*. Size and markinf^s of head, thorax, and wings as in T. neqicale^ the legs "ochre-yellow, except the shanks and feet of the tirst pair, which are black" (Harris). Abdomen mostly yellow, first segment black, an anterior fascia and a middle one moa(pie; first seg- ment black; second segment black with two yellow cross-bands, con- nected on the lateral margins, the tirst narrowly, the second very broadly inteirnpted; third segment with a median black cross-band, dilated in the middle diamond shape. Very large, robust, nearly naked species, black or yellowish brown, with yellow thoracic and aiidomiuiil n)arkings. Head hemispherical, broader than thorax. Antenna* not long, porrect, inserted on a pro- jection of the front, third joint rounded ; arista bare. Face concave in proHle, shorter than the front, moderately projecting below. Eye.s bare, contiguous in the msde. Thorax large and robust, with yel low markings; scutellum in large part yellow. Abdomen more tliiiii twice as long as thorax, only a little broader in the middle, tJMttened. with yellow bands. Legs strong, hind femora elongate, below near outer end with a tooth-like projection. Wings comparatively narrow, marginal cell closed, third vein somewhat bent into first posterior cell ; anterior cross-vein beyond the middle of the discal cell, very oblique, the sixtli vein beyond the anal cell bent 8-like. Type, M. crabrmifonnin Fab.. Europe. The genus Milenia, as employed by Latreille, included a large number of heterogeneous forms. St. Fargeau and Serville, in 182r>, restricted the genus to iiu;lude only our present species of Milesia and ISpiloninUi, in the sense here used ; for the species with unarmed feniora and open marginal <;ell they ])roposed the name Temnostoma. In 1803, a year before the origin of Milesia^ Meigen had proposed Spilomyia, based upon species with armed hind femora and open marginal cell, in 1.S38. however, he rejected both SpHomyia and Temnontoma^ and included al! their specico, together with the species with closed marginal cell ami toothed femora, under Milesia. Later, Rondani, overlooking the name proi)osed by Meigen, based Milesia uijon the very species to which Spilomyia had been previously given, and the species with the closed marginal cell he call< w in- eluded in the jjenn.s Milexia were known to Katreille at the time his iXenus wan named. Fahrieius, a year later, <'iian^'ed the name of Siirplnix cmhronij'y, niH Fab (Kntom. Syst., iv, 2!)!») t<» MilrHiii, and the name was adopted by Latreille in his later work (den. Crust., iv, ,i:V2). Ac- cordinj; to the strict canons of modern nomentHature a );enus (;aiinot be liased upon a species unknown to its author at the time of its erection, but MUenia of Latreille «!an hardly be said to have had any type, and if the name is retained at all it should be given to tho.se spe(;ies that were first restricte«l by any author. This was done by St. I'^argeau and Serville, they restricting it to four species, two of which had Iummi jtre- viously included under Spihmyia by Meigen. It seems (pute useless and very contusing to retain the name of Sphirea, as is done by Bigot. "Southeastern Asia, and especially the East Indian Archipelago, seems to be the real home of this luindsome genus. Thirteen species from the Archipelago have already been described. To these I now aleuriB with :tu oval, nearly contiguous, spot. Abdomen: First segment black; second segment with a broad yellow cross-band, narrowly interrupted and nar rowly separated from a redtlish-yellow, shining, entire cross-band, whi
  • order of the fourth, black; pile chiefly orange colored, lighter on the yellow bands. Legs yellow, with yellow pile; tarsi and outer part of hind femora more reddish, and the pile intermixed with black. Wings nearly hyaline, especially in the first basal cell, somewhat yellowish or brownish in front, and slightly clouded near the tip. Eight specimens (Dr. G. Dimmock, Mr. 8. Henshaw, Mr. E. Keen). ,]/. Hmhipennis Macquart, as figured by Macquart, shows very great ditl'erences, in that the marginal cell is open and the third vein nearly straight. Osten Sacken, however, from an examination of the type specimen in Mr. Bigot's collection, believed it to be nothing more than a variety with dark wings. A single specimen from North Carolina (F. V. Atkinson) has the wings very dark brown, almost blackish, in trout, the scutellum wholly yellow and the yellow bands of the abdomen sep- arated only by slender black lines. SPHECOMYIA/ Sphecomyia Latreillc, Fain. Natiir. dn Kegiie Animal, 1825 ; Diet. ClaHsique d'Hist. Nat., xv, 545, 1829. Tijzenhamia Gomki, Analec. ad Ent. prov. occid. imiuirii Rossici, 1852, fasc. i, p. 170. Moderately large species with light yellow markings on head, thorax, and abdomen ; the latter with a median and posterior band on segments 2-4. Front very short, horiEontal, concave longitudinally. Eyes bare, narrowly separated in the male by the ocellar tubercle. Antennal pro- cess moderately prominent. Antennse longer or shorter than the head. Face perpendicular, obtusely tuberculate, reaching two-thirds of the ' Sphex ; nvta, fly. !l' SVNOI'SIS or NOKTII A.MKKK'AN SVIM'IMD/i:. 2r)7 vcitical (liiiMictrr of the cyt-s below tlic orhi), lninc:itt' at tiji. Ahilo- nuMi c.vlinilrii'a]. Lo^js siiii|)l('. \Viii;,'s: Miii<,'iiiiil <'<'ll wido optMi, third l()ii;;i(ii(liiial vi'iii ^nitly siimatt', sniall cross- v«'iii (»l»li(iiic, Joiiiiii,,' tlio fourth loiinihiiliiial \riii nrar oiilrr tliird of discal cell, last section of fouitli vein li;;hMy ciiivvd, joiniiij;' the thii'd ncaf tlic tip. Typcof jicnuf S, V it tutu Wied. TAIUJ: of SI'FX'IKS. 1.— Aiilfiiii.ir very loim, llif tliinl Jniiit mtv Himrt vittata Aiili'iiiiii' slioitiT timii till' liiini, liiMi twd J( 'Ills V( ry Hliort, tlio tliiril tiuiiHvi r«cly illi|itica! . . 2 2. — Yi'llow (■ii>'<,s-lijmc|s (if :ili(liiiiirii vciy ImiiKl brevicornis Yrlliiw iiliiliiiMiiiiii I riiss-liaiids ii;in*., ii, 87. I'nurun orintlim Wirdciiiaim, (/;((/., ;»1, 1 ; tali, ix, li^. 7 ; Muoqnart HiHt. Nat. Dilit.,i,.|l(l. Splin omnia rillala Maciiiiarl. Dijit., Ksot.,!!, ',', IH, I; tal>. iii, fiR. S, I'rf. U'li^iin Aiiiinal, (,'iiv. xiv; Ostcii .Saclicii, Cut. Dipt., tii'it ; V. v. Kiider, Ent. .Sach- licli, 1871). 9(i. Tyzeuhaiiiiia vonjiiformia GorMki, Auali'«ta ad EntoiiKinraphiuin proviii(iai;\iii oc- cidciitaliH iiiipciii Honsici, 1852, fjiHC. i, p. 170-174 ; tab. 1, lig. 1 (umltO. (V. v. Hodcr, I. (•;. SphecoDiii'ia i'c.' • I 260 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. Margin;.! (it'll ot flic \viii>t joint of antenuio; tl'ird longitnilinal vein augnlated, bnt ..^eai'ci'ly hent into the Hrst postt'i'ior coll 2 Ant(;nual jn-occss slcMulcr, longer than iirst joint of antenna!; third vein hoiit deeply into lirst posterior cell . 3 2. — Vntennal j-iocess almost wholly wanting, first joint of antennae vtny slciickT, nearly as long as the two following together: laei- vertical, not at all ex- cttvat(,'d in profile; tecond segment of the abdomen nnicli constricted, third and fourth segments each with two arcuated si>ors signifera Autcnnal i)ro(ress about one-halfas long as lirst joint of antenniB, the latter slender, about three-lburths as long as last two togeth<'r ; abdomen without the side sjjots on third and fourth segments, the sceoi.d segment less constricted; wings similar to preceding; the gisneral color more ferruginous . Loewii 3.— Second, third, and fourth segments of aI)domen each with two yellow spots, in addition to the bands of the hind margins pictula Second, third, and fourth segments without such spo^s 4 4. — St!coud segment of abdomen much shorter than the third . . . . abbreviata Second segment of abdomen nearly as long as the third tridens Ceria Loewii, n. cp. Habitat. — Arizona ! (?. Length, IC""". Face sulphur yellow; from the autennal pro- tuberauce a moderately broad ferruginous .stripe, white dusted along the middle, where it is the broad* st, ruus to the oral margin. Cheeks broadly dark ferruginous. From the base of the autennal process a small, indistinct projection, on each side, is directed outwards and downwards. Antennal process short, but little more than one-half as long as the first joint of the antennsB; the latter slender, about three- fourths as long as the two following together ; second joint a little shorter than the third, style -blender; the color is dark ferruginous. Vertex reddish yellow. Dorsum of thorax brownish black ; red on the sides and on the meso and ptero pleurae ; humeri and scutellum yellow. Abdomen: first segment, reddish brown; second segment, rather slender, somewhat longer than the third, with a spot on each side, nearly con- tiguous, and narrow posterior margin, yellow, elsewhere reddish- brown- ish black ; third and fourth with broader yellow hind margins. Legs reddish yellow. Wings brown on the anterior portion ; third longitu- dinal vein slightly augulated and with a stump of a vein ; first posterior cell closed in the border of wing. Two specimens (H. K. Morrison). This fine, large species I dedicate to the memory of Dr. Loew, to whom the science of American dipter- ology owes so much. SYNOPSIS or NORTH AMERICAN SYRPHID^. 261 Ceria abbreviata. Ceria ahhreviata Locw, Centnr., v,48; x, 57, note. Habitat. — Now Eiiglaiid, Virginia, Florida! (?, 9. Lonytli, 10 to 11""". Black. Face light yellow with a lue- ilian bhuik stripe, quite uarrow in the male, broader in the female, nin- uing front the antennal ])rocess to the oral margin ; cheeks broadly shining bhick. Frontal triangle in male yellow, narrdwly divide(c/i(?fl Loew, Ncno Beitriigc, etc., i, 17. Habitat.— S>outhevn States (Loew). 3,9. Length, 9™'". Head as in abbreviata; the thorax may show an additionally yellow spot on the suture; the abdomen, in addition to the posterior yellow margins, has on the second, \liird, and fourth seg- ments each two yellow spots; the second segment is longer as in tridvttn; wings and legs similar, or somewhat darker. The present species has not been recognized since its deseri|)tion in 1853. The descrijttion by Loew is as follows: "(Ian/ von Korperhaue der Ceria couoimoidcs und resj/iforntis, doch nocli kleiner als letztere, I' J m mm m 262 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. Ml t '\ !l H Auch in der Farbeneinvcrtheilung ahaelt sie diesen Arten, namentlich der Ceria c(mopaoides, our dass sie auf dem Thorax und Hinterleibe gelbe Flecken hat, welche jener fehlen. Die Farbung des Eopfs wie bei 0. conopsoidea. Auf dem Thorax findet sich auf der Naht uoch zwei gelbf riecke, welche C. conopaoides fehlen ; die Spur von zwei andern gelben Flecken findet sich a j der Mitte de3 Vorderrandes. Der Hinterleib hat von) 2ten Binge an Tiiusser dem gelben Hinterrandssaume je zwei gelbe Flecken. Farbung der Seine noch etwas dnnkler, als sie sich gewohnlich bei C. eonopaoidea findet. Fliigelgeader wie bei C. conopaoidea und vea- piformia; die Farbung derselben ttberall dunkler als bei diesen Arten." Ceria signifera. Ceria aigni/era Loew, Neue Beitr., i, 18. Habitat. — Mexico (Lw.), Texas, Florida ! 3 . Length, 14™™. Face perpendicular, not at all excavated in outline, yellow with a large yellow sagittate spot in the middle extending nar- rowly to the oral margin and more narrowly above to the black that surrounds the antennte, the base of which is yellow, in its middle with a narrow yellow stripe or spot ; on either side of the base of the an- tennsB the black extends out narrowly to the orbit; frontal triangle yellow along the eyes and separated from the yellow of the face by the lateral black projections; cheeks broadly black with a yellow stripe reaching from the orbit. Frontal process almo&^ wholly obsolete; the immediate ground upon which the antennae are inserted is yellow; first joint long and slender, a little shorter than the following two together, brownish yellow, darker toward the end, second joint shorter than th°, third, black, reddish at the tip, third joint black. Occiput black, the orbit dusted with white on the sides, vertex wholly yellow, extending broadly outwards. Thorax black ; humeri, a spot on the sides at base of suture, a distinct lateral supra-alar vittnla, an elongate mesopleural, and a sterno-plenral spot immediately below, and nearly all the scutellum, yellow. Abdomen much contracted at base of second segment, black ; second, third, and fourth segments with equal yellow fasciie on the pos- terior margins; second segment yellow on the sides at the base, with an oval reddish spot on the sides above, toward the base; second segment near the base with an interrupted fascia; third and fourth segmentc with a U-shaped spot on each side, the convexity behind. Legs wholly yellow. Wings brown in front, more yellowish toward the base ; third vein only a little angulated, not bent into the first posterior cell. 9 . Front black, at the base of the antennae, a spot on each side of the base of the antennae near the eye, an arcuated transverse, abbre- viated band above the base, and the vertex, yellow. One male specimen from Professor Riley's collection (Florida), and three females in the Loew type collection from Texas (Boll), bearing the label *' signifera?" in Lo«w's writing. I find discrepancies in the origiaal description which make me doubt that this determination is the correct one. SYNOPSIS OF NORTH AMERICAN SYBPHIDiB. 263 Cerla trldeni. Ceria tridens Loew, Ceutur., x, 57. Habitat. — Califoruia, Washington Territory ! ^, $ . Length, 11 to 12""". Closely related to aitbreviata; black, sub- opaque; face yellow, with a median black stripe, sometimes quite broadly oval, at other times narrow, extending froni the base of the antenual pro- cess to the mouth ; on either side of the base of the antennal process and connected with the facial stripe an oblique stripe runs outward towards the orbit, sometimes reaching it in an attenuated point; cheeks broadly black, sometimes with a slender yellow line; frontal triangle yellow along the border of the eyes, separated in the middle by black ; in the female the yellow may extend across the front, just above the antennal process, elsewhere black, the vertex with a yellow oval spot on each side in both sexes, touching the corner of the eye. Antennie black, joints of nearly equal length; process elongate, about as long as last two joints together; reddish tov'ard the base. Thorax black; humeri, a spot near the outer end of suture, usually a vittula above root of wings, a large oval spot on the meso-pleurae, a smaller one on the sterno-pleurae, and a still smaller one on the ptero-pleurae, all nearly con- tiguous, and the scutellum in large part, yellow. Abdomen cylindrical, black, finely scrobiculate, the sides of the first segment and the pos- terior borders of the remainder yellow, the second and third of nearly equal width, broader on the sides, the fourth very broad in the middle, attenuate on the sides, and sometimes with a conspicuous lunate spot on each side of yellowish pollen, hypopygium wholly black. Legs, male: Front and middle ^emora black, except the base and tip; hind femora black on outer half; all the tibiae with a brownish ring before tip ; intermediate joints of all the tarsi brown, last two of hind tarsi black; legs elsewhere yellow. Female: Yellow, the front femora with a ilorsal black streak, tlie tarsi more ochraceous. Wings brown in front, hyaline behind. Four specimens. The third abdominal segment in this species is scarcely longer than the second. Ceria nigripennis, ii. sp. Habitat. — Mexico ! 9 . Length, 15 to 10""". Deep black. Face with two large elongate triangula' yellow spots with the apex below ; on either side of the base of the antennal process near the eye a small yellowish spot. Antennal process a little longer than the first joint of the antenna?, llumeri, the scutellum wholly, a large spot on the meso-plenriv, a smaller on«'! behind it and nearly contiguous, and a spot on each side of the metanotum, light yellow. Abdomen only lightly constricted at base of secon. Habitat. — Mexico! 9 . LiMifjth, 9 to 10™'". Dark reddish black. Peduucle of antenues Bbort, scarcely a third the length of the first joint; second joint not much longer than the third. Antennae and peduncle brownish red. Vertex, small orbital spots nearly opposite base of antennae, and on the sides of the face, a ^)air of stripes beginning a little below the base of the antennae and somewhat converging to the oral margin, and two on the cheeks, yellow. Dorsum of thorax black; a small spot on the humeri, a smaller one on the outer end of suture, a slender intra-alar vittula, reaching nearly to the suture, a large trapeaoidal spot in front of the scutellum, and the scutellum wholly, yellow. Pleurae dark red, a median vertical vittula, and a spot on sides of metanotum, yellow. Base of second segment of the abdomen, and its posterior margin, and that of the next segment, yellow; second segment very narrow near the base, but broad behind. Legs dark brownish red. Wings brown in front, nearly hyaline behind. One specimen, Isthmus of Tehuantepec (National Museum, Professor Riley's collection). ADDITIONAL NORTH AMERICAN SPECIES. Ceria nigra. — Mexico. Sphyximorpha nigra Bigot, Annales Soc. Ent. «lc Fr., 1883, 317. Ceria rufibasis.— Mexico. Sphyximorpha riifibasis Bigot, ibid., 318. Ceria arietis Locw, Neue Beitr., i, 17. — Mexico. Ceria Daphnseus Wallicr, List, etc., iii, 637 ; Westwood, Trans. Ent. Soo.,y,231, pL xxxiii, fig. 7; Loew, Neuo Beitr., i, 18. — Jamaica. Ceria cacica Walker, Trans. Ent. Soc. N. S., v, 287.— Mexico. Ceria tricolor Loew, Wien. Ent. Monatschr., v, 37. — Cuba. i ' i I" I.* f'l-- I>ART III. CONCLUSION 867 !1 ■ lU Wm ■■ ! vSm "ii ;! jH ' Hf .' i ^\ Partiil-conclusion. TTAHITS or TUi; SYIJI'IIID^K. In their adult habits the SyrpliiilwuW show a jiiviit uniformity. They are Uowcr llit's, and feed upon lioni'.v and poHcn. They aw ohscrved on blossoms of sweet-smelling, melliferous phi nts, sucli as the iiymenop- terajjrefer; and patches in bloom of blackberry (/»!»//>;/«), wild yherry {PrunKs), dogwood (Cornus), Canada thistle (CirHum), and elderberry will always be sure to reward the patience of the collector. Some spe- cies, as those of ISyritta, Sphcvrophoria, Memnrapta, etc., will be seen wherever there are blossoms. Species of the last, especially, are very abundant about corn-lields when the jdants are in blossom, and will frecpiently alight upon one's hands; these "sweat Hies" are feared by not a few persons, under the belief that they will "sting." All are sun- shine-loving, and will rarely be found except in the middle of bright unclouded days. To collect most of the tiijrphini, Etistalini, and fol- lowing species, one should seek some i)atch of honey-bearing flowers, such as 1 have indicated, and patiently stand and watch for their ap- pearance, moving only slowly about. The ChiUmm will mostly be caught in beating, or in sunshiny, meadowy spots in the woods. Some species, as those of Xylota, are found among the foliage of bushes in blossom, and here and there appearing in sight, resting upon some leaf. Species of Chrysogaster will be found on flowers in dam^) places, and are easily captured, their flight being slow. Species of Neoascia will be readily overlooked unless especial attention is devoted to them. They live among low bushes and are not usually taken from flowers. Species of Sphegina, on the other hand, are found about flowers, especially in elevated regions. Si)ecimens of Baccha will rarely be taken-when at rest ; like most of the slender species they are constantly on the wing, and only now and then rest very lightly upon some sunny leaf or blos- som. Owing to their wide distribution a considerable number of species in any one locality will reward long-continued collecting. In a few days, in the first week in August, I obtained forty-seven near the base of Mount Washington, the majority of them from a single patch of elder- berry blossoms not a rod in diameter, near the edge of the forest. The bright yellow markings if many lose their freshness after death, and the specimens should never be allowed to be moistened or wetted. The 26!) I. ; i i; 270 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. I'' 2 I most convenient uoUcctin^bottle that I have iiHed, conHiHts of a plain, widemoutlied, Htnail l)ottle, lined throu(;liout witli blotting-paper, in the firm cork of wlii(^li a small cavity is lllled with blotting-paper wet* ted with a Noiution of cyanide of ])otaMh. For a (;ollc(!tiiig-net I would reconunond coar.se bobbinet lace, attached to a light wire ring eleven inchcH in diaiiicter, with a light, rather short handle. LARV^. The earlier stages and metamorphoses of many of the European species of SyrphidoB are known, and very similar habits and structural peculi- arities may be expected from the American species when they shall have been more studied in the larval and pupal conditions. Very few species hitherto have been observed in the United States, and they oflFer no novelties in the general known habits of the family. The larvoo live usually upon vegetable substances, though some are partly or wholly parasitic upon other insects, especially the Aphido), which they serve largely to keej) in check. Uorae are aquatic, living in mud, outhouHCH, vegetable mold, breathing through the elongate stigmatic tube at the hind end of the body, which they protrude from the substances, when very moist, in which they live. Other species live under bark, on leaves, in the nests of bees, ants, etc. The larvee are usually not very elongate, with firm, sometimes tough skin, the head segments small and extensile. Like the other families of the Oyclorrhapha, the larvte of Syrphidae do not have a distinctly dififerentiated head. The external mouth-parts are either wholly want- ing, with only a soft fleshy opening, or there are two or four outwardly directed hooklets. There are also short, small, one or two jointed fleshy antennae. The body is smooth, or provided with soft, conical projections and bristles : below usually with seven pairs of abdominal feet. At the posterior end, the body terminates in a more or less elongate tube, single or double — the stigmata. This sometimes forms a short, almost chitinized, tubercular projection on the dorsal part of the last segment ; at other times it is very long, longer than the body, slender, composed of two joints, the one sliding within the other, like the joints of a tele- scope. It is never divaricate, or forked at the tip, as in many of the other tailed larvae in the allied families. In changing to the pupal con- dition the larval skin contracts, as in all of the Oyclorrhapha, to form the pupal envelope, and the body becomes shorter, more oval, and of a darker color, the elongated respiratory type, in the " rat-tailed " species, being curved over the back. At the expiration of the pupal period the anterior end of this envelope is pushed oflF by the inclosed insect and the perfect fly escapes, soft and moist, but in a very short time in the sunlight to acqiiire strength and firmness. Unlike all the other Cy- clorrhapha, except the Pipunculidre, however, the frontal lunule in this family does not subserve the usual purpose of springing off this trap or lid to the larva's prison, for it is fused with the front and not inflatable. Al 'I' SYNOPSIS OF NORTH AMERICAN SYRPUIDJE. 271 f tt plain, paper, in aper wet- t I would II g eleven lu species nl peculi- hey shall Very few they offer arvoD live or wholly hey serve UthOUNOH, be at the jes, when )n leaves, les toiij^h r families distinctly >lly want- utwardly ;ed fleshy ojectious feet. At ate tube, t, almost segment ; !omposed of a tele- ly of the upal con- , to form and of a ' species, eriod the I sect and le in the ther Cy- le in this is trap or 1 datable. This function is that of the inflatable face, and hence it is, this part of the Syrphid anatomy is one of the very best for the furnishing of struct- ural characters in the aartH (£'r»«'h those from the thorax arc unin)i)ortant. The ino.st useful are found in the wing, but a much larger number exist in the head, and arc, intrinsically, scarcely less valuable. Next in importance coino the various ornamental and functional characters of the legs; while the abdominal ones are superior only to those of tiic thorax. The Ibllow- ing remarks, it will be understood, are based chiefly upon my autoptic knowledge, and such reliable observations and descriptions by other authors as have been accessil)le to nu*; they may, in some cases, require modification to express tiie requirements of exotic genera. Most excellent struct aral characters are presented by the antennas. With projjcr caution, they are often serviceable in generic distribution, though by far the greater number will only permit of spcciiic employ- ment; some minor variations are sexual, or even individual. Formerly ntuch greater reliance was placed ui)on the structure of these organs, for generic distinguishment, than our present knowledge will conlirm. The basal joint is seldom elongate, ami when so, the elongation is raiely pronounced. It may be seen in Jlicrodoa, Ckrynogaster, Criorhina, Mera- pioidus; Spilomiiia, Ceria, etc., and has only subordinate vf»"o.s',and N/Kf/;V/ff,s7rr. In sit nation, the aristadeparts mark<'dly from its usiud basal ])osition onl\ ii> PclcriK-cni, X((u>ii;iaNtcr, anarative. Unlike all the other Diptera (\veloiriiapha (exeej)t the IMpnuculidie), the supra-antennal luinila is fused with the i'ront, and is not inflatable in the process of extrication fnun the larval envelojte. The face sub- serves this purpose, and it is here that we lind the greatest diversi y of structure. With the exception of Si/rphus, IJristalis, and some others, die species in most cases can be distinguished with more or less cer- tainty by the I'acial ])rotile. The pr()jection of the epistoma finds its greatest develoi)nient in li'liinyia, and only a little less in Ctioprom, Criorhinn, species of VoluccUa, etc. In most genera there is a more or less i)ronoun(!ed convexity near the middle, or a little below, but is sometimes obsolete or wanting where the epistoma strongly projects or is receding. The face is ai)t to dilfer in sliajje in the two sexes; usually the less convexity or tubercularity is in the female. This will be moro especially observed in species of Cltri/xofiastrr antl Ckiloniti, MyiolipUi, Ptcrallastcs, and the more MilcKinAikv forms. The eyes dilfer in size and shaiic very api)re(!iabl> in ditt'erent genera, l)Ut characters tlrawu from tiu'in aie e\i>ressed with dilliculty, exce)»t by the aid of iigures. Their hairiness or |)ilosity is of greater, though always enera, though widely separated, must present a singular re- semblance. In Microdon the shape and spines are characteristic. In all the other genera the seutellum is usually hemispherically convex, and but little variable. In the wing numei'ous characters appt'ar, in nearly all i)arts. The !shaj)e anu termination of the second longitudinal vein, the curvature of the third, the position and shape of the cross- veins, the shape of the sixth longitudinal vein in the Eristaloid genera, and the termination in the Milesoid forms, all form the basis of our e" issifieation. In the Syr- phoid neuration the veins r.re usually weak, the wings light and thin; such are mostly adapted to a'rial flight and soaring. In the speiiies with inflected veins and more or less elongated anteunie Wv^ find the venation usually stouter and the wing heavier, the posterior part un- supi)orted; such species are more sluggish and less active in flight. Finally, speed and strength are united in the ErintaUni, Xylotini, and Milesini. The wings here have moderately strong veins, with the outer and i)osterior portions stronger. Syritta differs most in the position of the cross- vein, and its habits are more nearly like the Syrphoid species. In the abdomen the shape, flattening and elongation offer the greatest men is the most peculiar; here the fourth segment is extraordinarily developed and arched, wliolly excluding from sight the following seji- ments and inclosing the terminal oigans in a deep ventral cavity. The legs, outside of secondary sexual characters, which will be spoken of further on, do not ott'er a very great deal of structural differences, They find their greatest slenderness in the Syrphim, MeJanostotnim. and here rarely have any thickened parts, and then usually in the feet. In the Kristulini and Xylotlni they are usually stouter, and very often II ! SYNOPSIS OF NORTH AMERICAN SYRPHID^. 275 aJcotinjiu ?ly, both >'ular re- stic. In ' convex, ■ts. The vat lire of [le of the nation in the Syr- lud thin; e s|>e(!ies I tind the part un- in fliftht. otini, and the outer losition of d species, e greatest he former pecies are csograpta, sually be ti oval de- structure, itremes of slender, or Ota group, id in Seno- .Mits. The /hi, but in falini, it is loi)nuMit of \'a)tiiig((.sti'r lordiuarily owing sej;- ivity. 1 be spoken Lliliereiiees. anostomini. in tbe feet. very often with the iiiud femora elongated and thickened. In tlie Milrsini the great- est elongation of the legs occurs, in the ClinjHO(jn,ster-\[ke forms the most shortening. SECONDARY SEXUAI. CnARACTEKS. Secondary sexual characters occur witli gre;it frequency in this fam- f y, and will offer many interesting subjects for future study. They are l-^und in most parts of the body, but, as one would exj)ect, are met with in the greatest diversity and number in the legs In the head a ditierence, constant througliout tlie family, is found in the eyes. In nearly all the males they are contiguous for a longer or shorter distance between the ocelli and antennie (holoptic) ; in a few genera (as Microdon, Chalcotnijia, Crioprora, Triodonta, MaUota^ Ilelo- pliUus, etc.) they are more or less widely separated by the front (di- choptic); yet in every case, to the practiced eye, the male can be dis- tinguished with tolerable certainty by the front alone; even when the female is unknown there is never any excuse for confounding the sexes. The male eyes when dichoi»tic will always present an angularity that is wanting in the other sex, and there is always some narrowing of the front. The female front, though sometimes considerably narrowed, always has the margins straight, without angulation. In a few genera, all holoptic, the males show areas of enlarged facets near the upper porti«)n of the eyes. Tliis enlargement is most noticeable in AlUujrapta and Catabomha, but is also indicated in the forms related to Xijlbta. Although I do not know the habits of Catuhomba, one can safely say that those with this enlargement are disposed to hover motionlessly in the air, and are especially well gifted with rapid flight. The male eye freipiently has a greater pilosity than the female, as it is also often larger. In a number of genera there is a greater development of the lower part of the front in the male, forming a protuberan(;e upon which the antennae are located. This is most apparent in the genera allied to Milesia. There is not much ditterence in the antenuiti. In a number of genera (e. g., Chrysotoxiim, Chilosia, Brachi/opa, Volucello, Sericomyia, etc.) the third joint is larger and broader in the female, and in some the arista is less plumose, in the structure of the face the most impor- tant variations will be found in Mtjiolcpta, where the male is provided with a small, but prominent, tubercle near tlie middle, whicli is wanting ill the female. Similar ditloreiiccs will be seen in some other genera, as in species of Chilosia, Clirijmf/atifer, and I'tcntllaNtis. The other dilt'er- ences between the sexes have already been adverted to. In the mouth organs I have observed but slight sexual dillerenees; in some few gen- era, as in Criorhina spi)., the female proboscis is longer than that of tins nniles. In the thorax I know of no structural sexual dilb'iences ; n(»r, so far as I am aw..re, do any such exist in the wings. In the abdomen, in addition to the |)rimary characters, no ditf'erences t ii I i m I. of importance present tliemselv es. The shape in the male is frequently 276 MULLETIN y,\, IINI'I'KU STATES NATIONAL MUSEUM. r: i! inoie sI«.'ii(U'r, and with ^'iviitiT convexity above. In all those ;jeneia (Ceria, Jiacvha, Sphcijiua, cic.) wlieie the abdomen is clubbed this itiiar- ac'.tv is ii.,iie i»r(inoiin<;ed in the male. In the genera allied to Mallota the male alxlomcn is toand more (;ylindrical toward the end. The most iinpoiiant: sexu.il cliaracters are in the male U'^s, ami probably subserve some |air|>ose in the sexual relations, although siicli must (»fren bi' dilliculi to understand, where otherwise closely allied »;pe<'ies diller marKedly in their presence or absence. In the front pair, PlatjichiniH and Pi/roplia'^id tnj/nii nve the only ones known to me where stru(!tural dillerences are seen, the libiie and tarsi beiny moie or less dilated in tlko male, and tlie saaie sex sometim(>s provided with lemoial bristles. Dilfere'iices in tiie middle paii- are contin(;' plastic ditt'erences {nv sent themselves. In the i:h'2>fit this lickeiied). I e.vlliidri ibia; there and eoiii- nied. All onie, as in in others male. In er jieneia, Lt the til), flattened ies on tlie toNiis, and le base of liicli I ail) liiul meta- velopmeut in Mlcrodon {Ubristcs), but is also seen in many of the Chilosini and Mclanostoniini ; rarely if at all in the J-Jri.sfnlhii. and fcdlowiny groiii)s. In coloration and pilosity by far the {rreater number of spe<;ies otter S])hc(/ina), and thora.x {Ilelophilus). As a }i,eneral rule the male coloraticui is more strongly iiidi«tated: such we know is in conibrmity with the general zoidogical law, that the male shows the greater number of ornamentations, both in color and structure. In the male the pile throughout is freipiently longer, more abundant, and sometimes darker in (;ol()r. None of the foregoing sexual dill'erences appear to be chara(;teristic of the family. Thus, holoptic males are ])redo!niiiaiit throughout the order; diiierences in the size of the anttMime may be met with in the J/M.s'CvV/ff, etc. ; similar or allied structural variations in the legs, in the ladnnuliv^ DoHclioptKlida; Mitla.si(}a\, Asilithr, etc.; of the abdomen in Stratiomyida; etc. On the other hand, sexual dilVeremtes in the wings, as in the A.s77/V/a', and ce'tain ornamentations of the h'gs, as in Aailida', Tachinifla,, J)ollcliop(>(li(l(V, Einpida', etc., do not occur here. What is the purpo.se of these .sexual peculiarities .' This is a (piestion easily a.sked, but far less readily answereom the spt-eies/ Another (juestion, iinjiortant to all systematic eiitoinolo^iists, aiises from their diseussion. Are secondary sexual eharaeti'rs servieealde as g'eneri(5 charaeters ? Contrary to tlie oi)inion of many stulicli<>p()!in hciii ('st.il)lisIi(Ml in oilier hiiiiiclics of systciDJitii* biolojiy. I mciiii tin- ^-riMicr icscmhIiiiK;*- Ix'twcfii tlu> Pucilic iiiid Kmo- IH'iiii t'lmiiiis tliMii hctwci'i! the Atlantic and lOiiropj'an. Of course \vt> can ,Vi't ou]y spe.ik ii) abundant in Europe, lias so far fnc species peculiar to tli. Ivist, ten to the \\'est, and eiyht in comnntn. ArctupliiUi, J'ocdid, and certain species, occur only in Europe and Western America. The ride has Iteen so often con- tinned that it may be accepted without hesitation, 1 think, viz: that Eastern American sjiecies, identitral with Euro;, can ones, Imve usually a distribution across the continent. On the other hand, the example of Cuiuhotnhd piiidNtri, an lOuropean spe( ies found in ;j;reat abundance in the Western but not in the iOastern r<'^non, is a tact bearing; in tlie same direction. To this last si)ecies ! think we may safely add J-Jristali.s Icmix as bein;4 i)rimarily Western, but which, during' late year.^, has been distributed from the West eastward. I have no explanation to }iive of how the I'^iiropean species have reacthed the Western rej;ion, if they are not in reality indigenous there, whether by way of the Atlantic States, or whether the species common to the two sides of tlie conti- nents have traveled from West to East ; but I certainly think in some cases, such as that of Eristalis lemix, it has been the latter way. Of all the numerous species common to Europe and America, very- few are confined, so far as wc know, to the Eastern States, and every new examination of Western nmterial subtracts from the number. The larger number, so far, of those genera peculiar t;> Ameri(-.i are found in the East, and nearly all the American genera common to Europe are found in the West. Exceptions to this are seen in Eupcodrs, Pelecoiera, Somula, and especially Rhbujin^ etc. Again, such genera as Microdon, Xanthogramma, Ccria, etc., seem to indicate that those genera with few species in Europe are best represented in the Eastern States ; but the facts wdl allow us to ])redicate but little here. In speaking of the Western fauna, I refer especially to the region limited by climatic conditions, and not extending further east than Western Nebraska, Middle Kansas, and Texas. From several years' active collecting in Western Kansas, I long ago recognized the almost sharp limitation of si)ecies. In some cases, especially among Ccdeop- tera, the eastern lines of habitat could be traced almost as clearly as the tioral habitats on the mountain side. Yet another i'iwX of great interest is the entire absence of several large European genera in our l';\nn.\ — i:ii)ucnis and Meroflon especially. It is very doubtful whether the former will ever be found in the United States, i)articularly the Eastern ones. I i| 5 II ;■ >' 280 HILLKTIN :{1, UNITKD STATES NATIONAL MUSEUM. I have t'lideavort'cl to sum up our knowlc'.ye of tlio geograpliical (lis tribution in the lollowiuf,' table. It will, oi eourse, be understood thai the data of the occurrence of yenera (in their modern Hifj^nitieation) iii Asia, Alriea, and South America are yet meager, but I have given .such as I have been able to obtain. The occurrence of genera is intlicated by asterisks, which are replaced l)y llgures when species are known to bo comnu)n. Tabular synopiiia and geuyrujiltkal divtribittiuii 0/ (jcncra. a«nera. Microdon (;lir.VMOt()xum ParnuuH , NiiiiHij;iister. . I'ipiza. P.silotii ('lit Nso^iiHtor. Oliilosia MclaiKwtonia. I',vr<)|ilKniiii I'ial.vrliirua .. LuiicDzona ... (Jalalioiiilia ... Ku|IIHIllv8 s. ^ 12 « 6 3 4 2 1 u 1 8 14 12 2 5 1 1 1 Svipliiis I 23 l)i«l<'a Xantlio^irainma AlUiyniptii Mesotirapla S|ili!i'i'o])horia . . I'ohH'ociTa >.'e()ascia SphoKina Bacclia Clialcimiyiu Mvidlcpta ItliinKiii Kii!!<'i>ianiyia... Uiachynpa Voliicclla CopH.styliiin Sericoinyia Aictophila , Kristalis Doliimyrphua ... Ptcrnptila IIolopliiliiB , Pti'iallastt'B — Tciirliocnemis.. Mallota , Tnoiiouta Tiopiilia Oiorliiiia , Ciii'inoia Pocola , Bniilivpalpus . ., XylDla St'tinjiaster Syiitta , ('liry.siiclilamya ili'iapiddiis ... Spiloinyia Tciinio- Ionia . .. Mil.'sia , Splicconiyia C< ria Total. 2 5 2 5 I V 2 I 4 I 10 i 1 4 I 1 1 I 3 "i 0 ! 1 20 j 1 ' 1 19 ! 1 ! 2 3 1 3 12 4 1 0 21 1 1 4 1 (i () 1 3 0 14 1 4 3 1 1 1 1 I 4 2 6 1 1 1 5 1 1 1 12 1 304 I ir.> p. 2 3 . 1 I- 4 0 10 1 1 10 1 10 1 1 1 7 1 2 1 * * 0 * 1 8 4 * 3 1 4 2 8 U a o a 3 a a V C o * ' • * » 1 * / i 1 * * ■■, ■ 1 1 5 « •■• ( * A * 10(i 56 1 * 1 * 27 » I 12 10 10 1 ;i .1 24 4 11 5 3 4 2 28 18 4 n 1 lit • \^ SYNOPSIS OF NOKTII AMERICAN SYllI'HID.f:. 281 .... if ..... .( * * 'iA 11 " 3 * 1 * :< 1 ..... * 4 ..... 28 * * * 18 * 5 * 4 * 11 1 * i:! * 1 -J ? 4 *) 1 * 6 GEOLOGICAL DISTUIIUTTION. Tiinmjili llu' (((iirtesy of Mv. 8cn. The neuration is, in lar^e part, conJe(ttiiral, and in all juobability has, as .Mr. IScuddor described, a basal cross vein, removinj;' it from Milesid and its con;;;eners. The, species is unusually larye for a t\ifrplius, but yet its atUnities are evidently with that {jenus. The ne.\t most strikinj^ point observed was the |»redomiiiance of the S!/r2)huii forms. The largo number of the species, as well as specimens, belong to this genus in apparently a narrow sense, and many of them are peculiarly characteristii^. SingiUarly, all of them apj)eared to have the abdonunal cross-bands interrui»ted or emarginated. In none did I lind (Mitire bands as in S. ribcfiii or Lcsiieurii. Xot a few had the i)ic- ture very like that of Ditha ht.m. The neuration in all showed much nniformity. The anterior cross-vein is basal and oidy rarely with any marked degree of obliquity. In the larger inunber the third vein is straight, or anteriorly convex, but occasionally gently sinuous, as in C((tatomh;( lujfasti-i, for in.stance. A very noticeable tendency was ob- served in the termination of the third vein near or beyond the tip of the wing, as in lihinfi'm and some species of ChiUmii, Chryttof/astef was identilied with consideral)le certainty in specimen No. 12021. Tlu' prolile of the head, moderately elongate antenna*, size, metallic coloration, apparent i)nnctnIation, and what seemed evidently rugose markings on the front, mv, all strongly characteristic. The neu- ration is, however, more like that oi' tSi/ipliKs or Clillo.sid than that of the typical ('lirij.w neuration, so far as could i)e lUiide out, is Spluyina Vilm. r I I i I* m 2H2 lULLKTIN ni, rNITED STATI'.S NATIONAL MVSKl'M. i . • hr NmiM'Tons Hpcciiiicns ol' Cliihisiti li;ivc hccii tlotcniiiiK*!, sunir ol" llicn. with (HTlaiiity, Ity tlit; t'aciiil itrolilc, iiiitcniiic, coloiation, nciiiation. slui[»e ((fabdoiiM'ii, iiiid slriictiiit' of h't-s. Pcrliiips tlic iiiosi cliaiiict*'! ■ istic, is spt'ciiiicii Xo. STSl, whicli lies upon the siih*. ;;i\ in;; an rxccHcnl jn'olih' ol' th«» iu'ad. Otiicr .spccinicns sccnicd to appioiich rijti-.ti m I'xilota^ lhon;;h on»^ coidd not say with absolnfr ct'itainty that these ycneni, in their inoih'i ii aecM-ptalion, aetnally oeeiir anion;; theni, thoM;;li i very much tliink tiial oii«> or l)()th (h). liliiiH/ia seemed to be reeo;;iii/abh' with snllicii'iit eeitainty. the de- termination based npoii cohn ition, shape of ai)(h)men, hii';;e \\in;;s ami ahnost typical nenration, and sienecimen No. 1 1(M)!». It may safely l)e said that Si/rj)liii.s, Cliihi.sid, Chriisoiiaslcf, h'lihiiiia, and Spliiii'ina oeeur in the American Tertiary beds, to wliicii may in all probability be added Vipizd. There is yet another form whicli could not be located in any of the known existin;;' North American .genera with certainty. 'I'lie specimen (No. Tti:?.")) w of i;>r;:'e size, in shape much like that of Mdllotd, the hind femora apparently much thickened, the an tcnntu ronndtMJ, the penultimate se(;tioii of the Ibnrtli vein Ion;;, and the anterior cross-vein basal and ieetaii;;nlar. The form is nearest allied to Mii!<>lt'i>fd. In conclusion, 1 cannot refrain from exju'essin;;- my admiration of tin- ]K'rfe(!tioii and accuracy (d" the diptei'olojuical drawinj's, and the can with which the specimens have been studied by Mr. Scudder. ^Ir. Scudder has j^iven u .summary of our i)resent knowled^'c of insect pale ontolo;;y in I'rofes.sor Zittel's Ilandbuch der Paleontoloj;ie, from which the following;' is ;;iveii to com|>lete the jiresent status of our i)aleoiito- logical knowledge of this family: "A very obscure object from Soleidiofen is referred by VVcyenl)er;L;h to Ghihma, and (xiebel refers to a new jfenus, lienielia, a minute lly flgured by Ilrodie from the Enjjlish Purbeck, but its reference here is very doubtful. "In the Teitiaries this family is more abundant and varied than any of the other families of J)iptent ci/clorrluipha. llurmeister and Terres both recopfnize Microdon at Aix, I'ipiza has been deis(;ribed from Kott. C hi! OS in fvom Wyomin;;, and seven si)ecies of tSi/rphiis from Oeiiin;;en, KadoboJ, liott, and Senef-ajjlis, besides which it has been recojjnized in amber; in amber, akso, are found two peculiar yeiiera allied to Asciaaud Xylota, besides Cliilosid, Voliicella, and (Jriorhina ; Rhimjia is noti<'ed at Aix, Erisfdlis described from Utah, IfelnphUux and Mcrodon from the Khine, and Milcsia from \Vyoniiii!i;'. Jiastly some thirty or more species of various ;;enera occur at l-Morissant, and a considerable number of them in a remarkable preservation. "There are descriptions of Pipizd, Syrphus, Mcrodon, and Ilelojyhilus.'" VM sYxcu'siH or xoirni amkimcan syim'IIID.e 2H3 Tilt' Aiiit'riciiii fossil sp«'i'i«'s jiliviidy (IcscrilM'd an* tlu' followinpf: Eiistalis lapideua Siinltli r, Itull. l'. S. (icol. Siiiv., iii, T.'tti. liiiKL'tl Upon an iinpcrt'cct spcciiiK-ii, and, as hi'lorc Hlatcd, probably not b(>lon;;ni^ to tliis ^'iMiits. Milesia quadrata Sc mliU r, Mull. U. s. (;imi1. Siirv., iv, 7.V2. I'roba Chllosia a Milesia; sec remarks on previous page. impla iiiliItT, Hull. r. S. (Ii'dI. Siirv., iv, /.Ml Most probaltl.v a true Cliilosia. CIIlfONOT.OOIf'AI, IJST (*V OKNl'-UA. In tbei (bllowinj; list I liave endeavored to ^-ive all the j-etu-ric! nanien hitherto i>roposed in the luiiiily of S/irjiliithv, arranged clironolo^iicially. Such names as ! believe t«) be well founded, or \vlii(;li 1 cannot iind any reliable data as to tiieii- synonymy, are printed in heavy type, in order io distin;;uish them from those which are believed to be synonymous. The latter, |)rint<'d in italics, it will be observed, are preceded by nundu-rs indicating their synonymy. I'ndoubtedly from amonu the foi-mer (ttliers will yet be shown to be synonyms, and from the latter not a few may be finally accepted as sub}j;eneric, or as applyin;; to species sidli(!iently distinct tojustify their use. 1 have jfiven, in brackets, such <(f the various spellings as I have been able to find. The habitats giviMi are of the type species. 1763. 1. — Rhingia [llhiingia'] Scopoli, Eiifi>iii.(/'ariii<)l., -iM. Europe. 1764. 2. — Volucella (icolVroy, Hi.-st.ilrH iiisfctcs dt-s environs do Paris, ii. 1775. 3. — SyrphuB Euhriciim, Syst. I'.iitom., 7(W. Eiuoiio. 1794. 4. — Ceria FiiliriciuH (noil Sciipoli, ITOiJ), Entoin. Syst., iv, 277. Europe. 1801. 2. — Ccnt)//a«^r Dnmdrili, Expos, ct (lict.d'liiBt.iiat. Europe. 1803. 5.— Chrysotoxum Mei};*'", in Illijifr's Mufj., ii, "250. Europe. 6. — Spilomya [>'>;i7om,i//nl., '-i^t; Europe. 8.— Doros Mfif^iMi, ibid., "274. Europe. 9.— Sericomya [m//ifl, ?H,i/ifl] Meij^eii, ibid., '274. Europe. 10.— Blophilus [//Wo/*/m7i(.'<1 M.iKi'ii, ibid., 274. Euiopo. 11.— Merodon Mc'i;,'rn, ibid., 274. Eiiro|)t'. 12.— Microdon MoiK<'», ii>id.,27r>. Ennnn;. 2. — Pterocera Mel;i(Mi. ibid. I'-iiropc 1804. 13.— PsaruB Latrcillc, lli.sl. nat. Ciu«t ft Ins., xiv, 357. Europe. 12.— A piirili't LafifilU', ibid., lloH. Europe. 14.— Paragus Lalreillo, ibid., :{;')!•. Enroite. 15.— Milesia l>atieil]e, ibid., :$t;i. Eiiroi>e. 16.— ErlBtalis Laticille, ibid., :W.\. Eiiropo. If./i 111 284 lU'I-LKTIN :(l, UNITKI) STATKM NATIONAL MUSEUM. 1809. 37.— Baooha ( lta. Kiirope. 3.— A'tdivi I'liliriciiiH, iltiil. l')ui'o|ic. 1806. 18.— Callicera I'liii/er, Fuitiiu Uoriii.. riv. Kiii'i)|Mt, 1016. 19.- Pipiza Fiillen. l)i|>t. mih-c , S,M|tli., 'ih. Knropfl, 1820. Oraptomyza VViciUMiiiiiiii, Nov. Dipt. 1822. -Ascia Mi'inen (iiitii Hcopoli, ITTT), S.VMt. HtiNclir., iii, 1.85, Europe. Sphegina [Sjiliiiiiina] Mri;;cii, iltid., l'X\. Kiirope. Eumeros [im] Mt'i^iMi, iliid., *J)i'.i. l':iiro|it'. Xylota MciKt'ii, il)iil., "211. Kiiri)|ic. Psilota .Mt'i;;i«l., '..'.">(;. i;iini|n'. Brachyopa Mt'i<;i'ii, iliid., '^(iO. Kiiropf. Cheilosia ll'hiloxhi] M<-i^i>ii, ihid., '.".Mi. Hiiropu. Pelecocera [ /V/on /•« | .Mri;i;t'ii, iliid., :!40. Hurope. Tropidia Mt'ifr,.|i, iiiid., :{4(i. Kmcipt'. Mallota .Mt'iiftii, iliid.. lit*. Kuropr, 1824. Ceratiijiiiiiii ICeratlinphjia, iiliijiii] Wicdiiiiuim, Aimlect. Eutoni., 14. South America. 1825. Ornid'm St. Far(.jt'ini mid SiTvilli-, I'.iicycl. iin5th., x. Europe. PlatycheiriiB ll'laliirliinm} St. l'iir;;('iin and Sciville, ibid., SlU. Europe. Pocota [l'loci>tn] .St. l'inj;ecom!iia'\ Lutreille, Faui. uatur. «lu Rejjne Animal. North America. 1830. Platynocheetus [elim, «'/m«] Wiedemann, Auhh. zw. Ins., ii, 147. Europe. 1834. MixtemyUi IMixonijiiu, M\ixtem!i\u'\ M; cquart, Hist. nat. dipt., i, 491, North America. Criorhiiia ICriorrhhia, Chriforhina, CIniorhyna, Criorhjina^ Macquart, ibid., •11)7. Europe. ChjimoithiJa Mac(iuart, ibid., 48H. Didea Mac<|uart. ibid., 50d. Europe. Priomi'fus Mac(|nart, ibid., .'ill. Senogaster [Slnnujanter] Mae(|nart. ibid., .511). South America. Brachypalpus Mactjuart, ibid., ^)'2'.i. Europe. Ocyptamus Macciuart, ibid., 554. North America, Orthoiititra Mac(inart, ibid., .")():!. North America. Palilalia Mac(|'iart, ibid. 1838. •/)tme)V(«7;i8 Newmiin, I'iiitom. Maj;. , v, ;57v!. ■Myolepta \_M\iU)hpUi'\ Newman, Entom. Ma<;., v, WTi, Eiiica Meigeu, S.VHt. Besclir, europ. z\v. Ins., vii, 140. Europe. •l/i(Ta;>^>ma Westwood, Introd. ('las.s Ins.,i. 1840. 33. — Coprliiii Zctterstedt, Ins. Lapp. Europe. 20.— 107. 21. 22. 23. 24. 25. 26. 27. 28. 29. 12.— 2. 30. 31. 32. 33. 2. 34. 35. 36. 6. 37.- 12. 38. 16, 39. 40. 41. 7. 12. 42. 38. 23. V I J . "^^ 8YN0PSIN OF NOUTII AMKKICAX HYUIMIIDi«. 285 43.— TriglyphiiB [ T'-ifihiphiH'] Iau-w, Oki'ii's IsIm. .Mm. Kiiropo. 32. — Mvlilhni>tiin ( Mrlilir)ttii»\ I. new fiiiii> Vi-ill.), iliid., .'>77. Kiiropb. 1842. 44.— Mlxogaster .M;i<'i|Murt, Dipt, i-xot., li, 'i, 14. Soiitli Aiiiorica. 4S.- Megnapis M:i(i|iinrt, iliiil.. '27. KuntiTii Aniu. 76. — riu'iiniini .Miiri|ii.iit I lion Kliij,', I'"l!t), iliiil., .V.I. .Noitli Auiuricii. 46.— Dolichogyuii Muniiiait, ('..'), ihid. cliiii, 29. — liiKitiiiiiiii MiiriiMiiii, ihiil.. (it. Niii'.li Ann rica. Iiiiliii. 47.— Aaarkina [.iMumtio] .Mii<(|Mart, il>iil., 77. AlVica. 1843. 48.— Sparigaater [•"*/'"''.'/'"*'"■. ■^i>iiilii<>hnUi)iia»ter, SpoMio- IIOKtir, Sjinwijiihltr] ItrtiHlaiii, Dsaiii. d. vmi. h\>. Ditt. I(ta.sil., Kttv. Kiitoiii. 1844. SQ.—l'rrdiintiiilrii \_ii(i, ia\ Kotidaiii. .\iiii. .'^c. Nal. di I5.'>. 1846. 49.--Copestylum Maccinart, Dipt. i)l., l".M. Ci'iitral America, 1847. SO. — Somula Mai'i|iiaii, Dipt, txoi., J' .Siippl., ,'.t;. North Amoricu. 1848. 51.— Phalacromya ["'.'/irt] Koiidaiil, llMain. il. \ar. sp. Uitt. liraHil. 1849. 52.— Meromacnis K'ondaiii, .stud. Kntoin. 1850. 53. — DolichomeiiiB .Mai(|Mart, Dipt, cxot., I'' Siijipl., i:?!. Asia. 54.— Senaspis | ."yii imsitiM] .Maii|ii:iri, iliid., i:i:i. Africa. 55. — OrthoproBopa Macipiarl, iliid., 1' Siippl., 1 Ct. 'raHinaiiia. 104. — I'ohjiUnitii .M.'iciiiiart (iioii l'is(diiM, l'^il7), ildd., 144. North Amcrira. 56.— Colloprosopa {('oihtnuUijHi) Ma((|nart. ihid., 14.'>. 'r.isniaiiia. I'liHin Ma(i|iiiirt (iioii .lur., 1H(»7; in'c Kliij^, lH;i:{), iWid., l.'iti. \f\v Zfalaud. 57.— Hemilampra (.l/(.s(>/(n/iy(r(() M:<<'ip""'fi il'id., l.">'.). Tasinaiiia. 4. — Sjiliiximoriilia l-Sjiliiiximoriilia, Stiliuiomorphu, Spiximtirjihal Uoiidaiii, Ann. Soc. I'^nt. (Ic Frame. Kiiropc. 1851. 58. — Chryaochlamis H'lirnsochlumiii. ('Iiriifoilumiix] (Roudaiii) Walker, Iim. Brit., i, '279. Kiiri)|)<'. 1852. 35. — TijzeiihaitnUt \_:ia'\ (loiski. Aiiiial. ad I-^ut. prov. Ho.^sici, 170. Europe. 1855. 84. — ToTomrnis Macfinart, Di]»t. cxot , .'i' .Siippl., 112. North America. 1856. 29.- XiilirnledHii Jfoiidaiii. Dipt. Ital. I'rodr., i, 44. Kuropc. 15. — Spliixd'a [•'»'/) /i (>«•((, Spliiina, Spliizaa, Sphjixna'] Koiidaiii, ihid., 4fl. Enrope. 59. — Caliprobola [''ulliproliola] Koiidaiii, ihid., 47. l^iiroiie. 3. — Lnsiophtinis IJoiidaiii, ll)id., ."il. Kiimpc. 19. — llcriiiii'hi [ lliriiiiiiiii] K'oiidaiii, i I dd., .">.!. l^iiropc. XO.—MilothrojKi [Mnatfoim, Mii'ialropa] Ifoiidani, ibid. Europe. 3. — Ephtiopliv [((••< I Walker, liis. Samidcrs, ','4','. North America. 'l2.— i'hnxtis\\'\i\kvY, ibid., -jn. liiazil. 82. — Aiimtliia Walk.'r (iiou Lam., iicc lJoiix,iif'c Diip.), ibid., '22'3. Brazil. 60.— Citibccna Walker, ibid. 61.--Deineches Walker, ibid., 'i'i?. 62. — Baryterocera Walker, iitid. 1857. 63. — Lejops ILioi)'^ \ liondaiii, Dipt. llal. I'rodr., ii,lJ;!, note. Europe. 42.—Xiilot(rja Kotidaui, ibid., yd. Europe. f| t 280 BL'LLETIX yi, L'NITED STATES NATIONAL MUSEUM. I t m w ' y ' II' M r- .'(,.! f I \ : G4. - Mesembiius Rondaiii, il)i(l ,;")(>, note. Euiojio. 10.— l'il)h)'lla IJomUini, ibid.. I-Tj. I'.nroiic. 6S.— Simoides En>w, Dijtt. SiMafiikas. Alrica. 7. — ('aiii]>iiiieitra [('(impiii<'iir('. ~ ani]>li>)i( iira], Uoiulaui, ibid. 66. — Rlioga VValktT, Trans. Eiit. Soc. IahkI. 6/. — Lycastiis \V:ilii(l., r!nxt<'^'\ I-ocw, Cciitiir., iv, f'O. North America. 1864. 105. — /.«7)(V?())»i/io lioew (mm IJigot, 1>47), Ci-iitiir., v, IV-*. North America. 16.— .hoiia Walker (uoii Still, l.-;(i4), I'roe. Liiiii. lOiit. Soe., vii, '211. Mysol. 23. — Plants Kondaui, Arehiv. Zool. anal, c Ei.siol., iii, II. Europe, 1865. 84. — Mcsofiromma Loew, Ccntur., vi, 17. Xdrtli Ameri a. 76. — Pteroptila IPterojihild'] Loew, ibid., ."■>. North America. 19.— Ciiemodoii Ej;ger, Verli. zool.-ltot. (iescllscli.. xv, r>7;5. Europe. n.—i:r\ophora I'liillipi, W-rh. zool.-bot. (Jeseliscli., xv, 7:i5. South America. 78. — Sterphus I'liillipi, ibid., 7;!7. South America. 37.— Stilbosoma riiilliiii, ibid ,7;{(>. Europe. 7J. — Macrometopia PliiUipi, iliid., 740. South Ameri;'a. 19. — /Vhi'ioh [/V»Mi'((m] I'liillipi, il)id., 741. South Auierica. I'ia Pliillii i, ibid., 74'i. South Anuirica. 80. — Pahnnbia lioiidani, Atti Soe. Ital. He. nat., viii, 1'29. 81.— Aspeytia \^Ani)ciUu'\ Walker, I'roc. Ein. Soe, viii. 186D. 82.— Salpingogaster Schiner, Noviua lOxped., 344. South America. 83. — Exoclieila j /■xoc/k/k] Uondaiii, Atti d. Soe. Ital. se. uat., xi. Glaurotricha {Uaiirulricha) TlioniMon, Eiigeu. Ivcsa. Soutli America. 1869. 12. — Mcaophila Walker, List, eli?., iv, ll.')7. North America. 1872. 84. — Mesograpta Loow, Centir'., vol. ii. '210. Noitli America. 1876. £5.— AUograpta Osten Saekeii, Ihill. JhilV. Soe. Nat. Se., iii, 4'.). North America. 86.— Teuchocneriia Osteu Sacken, ibid., 5iS. North America. 1877. 87. — Catabomba Osteu Saclvcu, West. Dipt., iW.'i. North America. 88.— Eupeodes Cstcu Sackcu, ibid., ;(-2H. North America. SYNOPSIS OF NORTH A.MKKICAN SYIUMIIU/K. 287 North America, Enrope. 1878. 89— Crioproia Ostcii Sackcn. Cat. Dijit., l:!('i. North America. 39. — .Icruchonloiiodi H 15ij;ot, Hull. Soc. Kiit. Fr., No. V.\, V.M. S. Auicricii. 1879. 90.— Merapioidus [ts] Bigot, l?ull. Soc. Fiit. Fr., No.ti, (14. NortJi Aim'rica. 1881. 91. — Soleiiaspis Ostcii SiukiMi, Ann. d. Mns. liv.d. stor. iiat. Gfuou, IW. Now Guinea. 1882. 37. — lirachiimyia Willi.stoii, Canadian l',ntonioh)gist, xiv, 77. North America. 31. — lladromijia \Villinton, ihid.. If*. North Anifrica. 98. — Eugeniamyia ll^'ngi'iiioitiiiiul Williston, ihid., 80. 3. — Ani'jivloHjifjthiis ni^ot, liull. Soc. Knt. Fr., No. (5,78. 37. — luirhinomalhilu Hinot, ihid., 7"*. Mfxico. 92. — Simosyrpbus nijjot, ilild., 7[). 3. — fschjiroHjiriihiiH ni. .lajian. 101. — Eudoiasimyia Bi^ot. ihid. India. 1883-1886. 10. — Enrlnmyia Bigol, Bull. Soc. F.ut. Fr , No. 26. — CartoHijr^ihiiH Bij^ot, Aunalcs 8oc. Knt. I'r 27. — /w(coc., vii, 1:515. North America. 104. — Triodoiita WilliHtou, ihid., is-'ti, p. VM. North America. 105. — Lepromyia Williston, ante, \>. \\\. North America. 106.- Cynorhiiia Williston, ante, p. -JOD. North America, Europe. 107.— Neoascia Willi.stoii, ante, p. 111. ;?. Europe. ., 'i'M). Europe. Zeit.. iv. Nortli America. Ent. Soc. North America. DKFIXITION OF TERMS. iii:.vi). Holoptic. — Contiguity of tile eyes in tlie i-.iah', lietween tlic vortex anil tho antennas. Dk'.lto})1ic. — Separation ofthi- eyes liy the IVont in all I'eniale.s, and 8onie nuiles as iti f'halcomjiia, Ifclophilns, TrUidoiilu, Crioriiiini sp., etc. I' rtex. — Tlie n]»i)erniost lionler of the head hetweiMi tlie eyes. Ocelli. — Three small, siinph' eyes near the xcriex oti the u])per jiart of th(> front. Front. — Tho space included Itelween the eyes, tlie vertex, and tlie antenna'. Fertkal triangli: — In the male the small triani;le ni)i)n w iiich tli(( ocelli aie situated, jimited hehiud hy the verti'X, in front hy the eyes. L'rontal triangle— \\\ \\w nuile the triangular space hetween the eyes helow. limited hy a lino drawn through the hase of tho antennio. Frontal or antmnal procexs. — The more or less pronounced projection upon which tho antennio are inserted. i ■,: ||. I If I'.'. 2SS ncM.ETix :ii, united statf.8 national mcskum. rt > % i ;, III" li i! '' :..!' 'I Jiilinnii. — Iiiscrti'il cliisc totjctlii'i' in tlic line liclwccii tlif lV')nt atul lace, f()iii])OviMl ipf I lirci- joints, llii' third of wliicli hears thace between the h)wei' honh'rs of the eyes and the oral niiiinin. mer^inj;' into the face in front and limited l)y the occipital margin hidiind. <)ccii)itt. — Tlw. wliohi posterior snrfaec of th(f head. Orhiln. — A narrow indelinite s])ace immediately bordering the eyes, and called ver- lieal. or superior; frontal and facial, or anterior; the orbits of the che(d<, or inferior: occipital, or posterior. llp'tHliniiH. — The oral inart;iii of the face, and the rejjion immediatoly adjacent. Oral or biirral cavity. — The month. I'rohoHcis. — Mouth or;;ans, near tlu' base of whieli are inserted the small, one- Jointed palpi, and terminal in;;' in two lle.>-hy lijis, the lahcllw. Mention. — Th(^ posterior oral inarjiin. TIIOHAX. Dormim. — The whole upper surface, limited by tlie dorso-pleural sutures laterally, the .scutellum i)ostirriorly, and the neck anteriorly. Pltiirw. — The later.-il surfaces of the thorax. I'i'cliiH. — Tlu^ inferior surfact* of the thorax between the legs. Scntclliiiii. — A sub-hemispherical body behind, cut off by an impressed line from the dorsum of the thorax. Mclanotinn. — Tlie posterior surface of the thorax between the sciitelluiu and the liase of the alnlouu'ii. Humeri or xhouldi'rx. — The anterior superior aiiKh's of the thorax. I'oni-alar cnllonilics. — K'onuded processes on the posterior lateral iuar ])leura', ex- tendiii'.;' from the humeri throunh the )>ase of thpiii;r the under. lTrt('d in the metathorax Just in fi'ont of the lateral base of the abdomen. ARDOMKN. Iiicisiiris. — The sutures se|)ar.itiii,u; the segments. Fciitir. — The whole nnd(M- suri'ace of th(( abdomen. l[i/jK>liil!liiiiii. — The male sexual organs and terminal segments of alxlonieu. Oridiicl or nriposi^lDr. — The terminal segments of the female abdomen. i,i:r border of the winj;, a litth; before llic middle ; jii«t before^ its end it receives tht ponUrior hanal cronn-reiii. aurwr. Zt'loRf. ''■'«";■ '^"'•:'' ^.' "Pos/c-v,: I r~;' /lilV.Clfil-v b.l.v, 3. tone V. NViiii; of I\ihinliK. The contal cell is included lictweeii the aiixi'.iiuy win and tlie costa. The subcostal cell is l)(iunrlc(l in front by the anxiliary vein and tin- costa, behind by the first loiij^i- Midinal. Tlie marginal cell is inclosed by the first iind second lon<;'itndinal veins, wholly when the cell is closed, in part in front by the eosta when the cell is<)))cii. The siihmarghiul cell lies between the second iind third veins, tonehiii.,tiiough in some other cases the term is used to designate coarse pollen, as in Temnostoma. Pubescence is here used only to indicate very short, nearly microscopical hairs, on the arista, wings, etc. R i 1 I . I '<, '■■„ ■ i li APPENDIX. MIXOGASTER. Mixogaater Macquart, Dipt. Exot., ii, 'i, 14, 1842. This genus will be recognized without difficulty from what has been given in the introduction. The known species resemble Ceria in shape, but with the head of Microdon. Type of genus, M. conopsoides Macquart, South America. Thomson has described a species from Australia. Mizogaster mezioanus Macquart, Dipt. Exot., ler Suppl., 123, pi. x, fig. 15. — Mexico. PIPIZA. Pipiza crasaipes. Pipiza crassipca Bigot, Ann. Soc. Ent. Fr., 1884, 557. Habiiat. — North America (Bigot). 9 . Length, 7°"». Nigra, vix nitida. Antennarum segmento tertio chetoque fulvis; facie vinereo pared tomentosd; calyptris albis, halteribus testaceis; alis pallidissime fuscanis, basi hyalinis, maeuld stigmaticali testaced ; pedibus posticis parum incrassatis. D'un noir peu luisant, presque glabre. Antennes 3e segment et cbfete fauves; face avec un fin duvet grisatre, clair sem^; uu peu de duvet blanc sur les flancs ainsi que sur les cuisses ; cuillerons blancs, balanciers testac^s; ailes un peu roussatrcs, hyalines \ la base, macule stigmatique rou8sS,tre; genoux fauves, pieds post* ieurs l^g^rement epaissis, surtout le m^tatarse. — 1 specim., — , Bigot, I. c. Pipiza puelchella, ante, p. 27. It is not improbable that Chryaogaster Apisaon Walker, List, etc., iii, 572 (New York), is the same as this. At least the hairy eyes and elon- gate antennae indicate that it is a Pipiza (Pipizella) or Psilota. PSiLoTA. Psilot'a buccata. An examination of a number of specimens in the National Museum enables me to give a more complete description of this species. 3 . Length, 8""™. Metallic black. Antennae black; third joint elon- gate, about four times as long as wide, reaching nearly to the epistoma. Epistoma small, not much projecting. Face white pilose. Eyes long, luteous yellow pilose. Dorsum of thorax rather thickly reddish yellow- ish pilose. Abdomen elongate oval, shining black with a light brassy reflection; pile reddish yellowish, abundant, erect. Legs black. Base 291 292 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 'I !'■ I ), I : 'I ^li' 1 r»'i j!>', h: lUt of tibiae and tarsi Inteous. Wiugs brownish on outor part; last two sections of fourth vein nearly equal, short appendiculate at the angle, first posterior cell short petiolate. 9 . Face nearly vertical and straight to just above the epistouaa, which is moderately produced. Pile of front darker. Dorsum of thorax with rather thin lutescent i)ile. Abdomen broadly oval, tlie fourth segment long, the fifth nearly concealed ; in color, shining black, with a bronze reflection; pile lutescent. Six specimens, Texas. Two other specimens from Georgin are a little smaller, the third joint of the antennsB is a little shorter, and the abdomen is less metallic. The male has the face below the antennae more concave, and the pile of the dorsum of the thorax more blackisli across the middle. Very likely there are two species here. CHIIiOSIA. ChiloBla hoodlensis. Cartooyrphua luwdianua Bigot, Am. 8oc. Ent. Fr., 1884, 552. Habitat. — Oregon (Bigot). 9 . Length, 9™™. Nigra, sparse fusco etcinereo tonuntosa. Antenvia fulvis, vheto fusco, hrevissimd tomentoso ; facie nigra nitido, utrinque funco tomentiisa, /route nigra viUosa; ocnlis riHosiN ; tharace KvuleUoqm- nitidis, fvsca rillosnlis ; caJyptris fere alhitlis, haiterihus apici- a(staneix : ahdu- mine nigto opaeo, ntrinque einereo villosa, segmentis 1, 4 ^^ .")/« nitidis. L*, ef '.iis utrinqne, hasi, late nitidis; pedihus nigris, geuicniis tibiarmmpu- basi, fulvis ; alis paUide cinereis, basimactddquc stigmaticali infiiscatis— G. Clieilosia, propr. .'»:{. Habitat. — Washington Territ(U'y (Bigot). 9 . Length, 7' Tota nigra, nitida, nuda. Olieto, facie oculisqnc nudis; calyptris albis, haltcribus tistaceis ; alis pallidd tcstaceis. SYNOPSIS OF NORTH AMERICAN SYRPHIDJE. 293 Euti^remeut (Vuii iioir luisaut, bii^vement clairserad d'uu duvet griufttre; ch6te, face, yeux, uus; cuilleroDH blaucs, balanciers testacies; ailes un peu jauug-treK; quelques macrouh^tes noirs an bord de I't'cus- son. — 1 spocim. — Bigot, I. c. Chilosia tristis. I am wrong in uniting the male and female 8pecimens described under C. pallipen. Notwithstanding tha fact that specimens were collecte«l together, almost indeed at the same moment, they belong, I believe, to different species. My reasons I find in the shape of the first posterior cell. In C. tristis (the males) it is broader, and the last section of the fourth vein comparatively longer than in C. pallipes (the females). The female of C. tristis, according to Loew, differs also, apparently, in not having the light-colored humeri. SYRPHUS. Syrphus fumipennis. Syrphus fumipennis ThoniHon, EugenicH resa, 499. Habitat. — California (Thomson). S . Length, 10""". Eyes bare, frontal triangle fuscous pilose, yellow- ish; face slightly concave below the antennae, yellowish-white; cheeks bronze fuscous, subopaque; the lateral and front oral margin blackish, shining. Antennae yellow. Thorax bronze fuscous, the sides more yellowish; pile pallid; scutellum pallid testaceous, with fuscous and pallid pile intermixed. Wings somewhat smoky. Abdomen oval, sub- depressed; short, pallid pubescent; second segment deep bhack, long yellow pilose on the sides, \\ith a yellow, triangularly oval spot on each side, the sides anteriorly confluent with the margin; third and fourth segments deep black, with a broad yellow posteriorly sinuate fascia; hind margin of the fourth and fifth segments testaceous; hypopygium shining black. Legs yellow, base of the femora black fuscous. The above is an abstract of Thomson's very long and redundant Latin description. He says of the species, that is is very similar to S. corolla\ but differs in the smokj* wings and abdominal bands. I cannot apply the description to any species which I know, though I think it comes nearest to Americanvs. The legs are said to be black only at the base of the femora, and the bands of the third and fouvth abdominal seg- ments are not stated to reach the margin. Syrphus ochrostoma. SyrphuB ochrostoma Zetterstodt, Dipt. Scaiid., viii, 3133; Sell iner, Fauna Austr., i, 310; V. (I. Wulp, Tijdscbr. v. Ent., xxv, 134. Habitat. — Europe, Canada (v. d. Wulp). S ,9 . Length, 12™™. Is like S. ribesii, but the scutellum is yellow pilose, and the femora are wholly yellow. r*- 294 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 1' ! (I ' :, 'il> i!i Syrphus tarsatus. SyrphitH tormlm ZotttTHtcdt, Ins. Lnpp., ()<»1, 'Z\ Dipt. Sonnd., TM, X\', Staegcr, Gro»'nl. Aiitl., :W)0, 5>:. Habitat. — Europe, Greenland. Leiifrtli, 8""" to 9""". Shininjj metallic, blackish-green. Eyes pilose. Face yellow, oral margin bhusk. Aiiteunaj blackish. Abdomen with tiiree straight, interrupted bands. Legs reddish -yellow; base of fern or n and tarsi black j hind tibiae with a brown or blackish ring. Scutellum yellow. Syrphus dimidiatus. Syrphus dimidiatus Macqnart, Hist. Nat. Dipt., i, 537. Eahitat. — Georgia (Macq.). Length, lO.r*"'"'. Black, sides of the face whitish. Third joint of antennfe reddish below. First band of abdomen interrupted, the others broad, <'ntire. Legs yellow; hind i)air and base of front femora black. Wings brown on the anterior i)art. — Macquart. This description is not sufficient to admit of ideutification. MESOGRAPTA. Mesograpta marginata. The following synonym was omitted under this species : SyrphuH limbiventrhs Thomson, Eugenies resa, 485, 83. — California. Mesograpta coaiescena. SyrplntH coalencenH Walker, Dipt. SauiulerH, UW. — North America. Mesograpta corbis. Syrphus corbis Walker, Dipt. Saunders, 237. — North America. "Both are Mesograpta;, each represented by a single specimen in the British Museum, I find in my notes that both produced on me the im- pression of M. Boscii, although the description of S. coalesccns reads more like that of M.planiventris Loew; the female described by Walker is probably a different species." — Osteu Sacken, Cat. Dipt., 125, note. COPESTYTATM. Macquart's figure of C. flaviventris shows as much resemblance to C. limbipennia as it does to G. marginatum, but the descriptions will not apply to the former at all, especially as regards the structure of the antennffi. 'i, i!i )"' SYNOPSIS OF NORTH AMERICAN SYRPHID^. 295 . HEL.OPHIL<- SO!! d'un noir luisant, 2' segment abdominal onie en dessus, a sa base, de deux macules preeque trigonales, alongile of the thorax, and will apply equally well to B. pulcher. OBSERVATIONS ON THE GENERA AND SPECIES DESCRIBED BY MR. BIGOT. (Annales et Bulletin Soc. Ent. de France, 16S'.\, 84, 85). Phalacromyia vicina, Annales, 1883, 8<;.— Mexico. Phalacromyia melauorhlna, Annales, 1883, 86. — Mexico. This genus differs from Volucella only in the marginal cell of the wings being open. Mr. Bigot gives a useful table of the known species of thi.s genus and of Volticella. Microdon gracile, Annales, 1883, 321). — Mexico. Is not this the same as M. haliopterusf The descriptions read very much alike. 1 il k '(^' r I ' i 29R BULLETIN 31, UNITED STATES NATIONAL MLk^^oM. Miorodon oothurnatum, AnnnloH, 188.'}, 320.— Oregon. 1» M. trintiH, var. Cbryiotoxum vlllonulum, AnnaloH, 1883, 32().— Oregon. I make thiH a N.viionyin of what I call C. derivatum Walker, bnt it is pos.sible tliat I liave included more llian one Hpecies under tbat name. Ocyptamua fratemus, AiuiiiIi-m, lS8:t, :W4.— Mtxico. This i«, aceordinjj to the author, allied to O./unebrin Macq. Scbiuer (Nov. E.\i)ed., .'i40), was not able to decide whether thiti species diflfered Ironi 0. foHcipennis or not. liijjfot's de.seription of the wings has hardly anything; in conini(ui with the latter. OcyptamuB infuacatus, Aniialt'H, 1H83, 324. — Mexico. Is apparently allied to O. lathtttculus Loew. OcyptamuB rubrlventris, Aniiales, 32.^>. — Muxioo. Appears to be similar to O. dimidintus Fabr. Spazigaster baccboldes, AniiiilcH, 1883, 3'2U.— Californiu. This is the same as Baccha babista Walker, which is widely distrib- uted over the whole United States. The author places it in this ffenus on account of the oval third antennal joint. The arista is not plumoae. and the hiuON HALioPTKKfs Loew .', head of male. 3. MiCKODON TiusTlis Loew, will};; :!((, liiiul lejj. 4. MicKoixiN (ii.or.osrs Kaln., head of male. 5. Ciiiivsoroxi M DKuiVATiM Walker, winj. ; ."a, head of male; 56, hind leg; 6eJ iiiirciiiin' of four diU'cnMil iidividnals. 6. ("llKYSoToXtM. S|i. (I'tHIKSCKNS?). 7. l*Ai!Ainiile; W>, hind ley;. 2. PiPiZA PisTiCA Will., wing. 3. Pipizj* prKi.i.A Will., wing. 4. I'liM/A I'KSTiVA Mcigt'ii, head ot rt'iiiiilc. 5. I'liM/A < isTi('oii>i';s Will., itiittMiniv. 6. ('iii:v.s()(iAsri';i{ nKi.MM.A Will., wing; tW/, liHiidol' Mit»l« (the convexity of the fii^ is ;i lirtlc loii great). 7. (iiitYHOdA.sTKH MTinA VVietl , wing; 7«, head of male. 8. ('ni!Ys()aa(l of fiiiiiile. 5. ("iiii.oMiA TitisTis Locw, liciiil of iiijilt' ( Wiisliiii^ton Hjteoiinen). 6. [..KCro/oNA i.i'cuiM'M LiiiiK', win^ ; i'ui, lifiiil ot iiiaU'. 7. Mklaxosto.ma A.N(MSTAirM Will., lieiiil of iiiiilc. 8. Mklanostoma tioki.mm (). s., hciiil "f iiiah'. 9. Mki.ano.si'dma mkmim'.m Liiiiit!, lita iMiiiAiis .Mtly., IkihI nf maji- ; llo, left front (iltia ami tarsus o^ iiialc. 12. I'l.ATVCiiiiU'.s iiYi'KKiioiiKi s Stat'^rtT. ri};ht front tibia aixl tarHiis of male. 13. I'yuoimI/ENA ooY.Ml Fain-., aluloiiit-ii of female ; Hid, rifjlit front tibia and taraii^ ofmalo; I'M), li'ft middlt^ tibia and taiHUs of mule ; I'.iv, wing. 14. Kll'KonK.s voi.t'CHls O. S., abdomen of mule ; 14fl, hypopygium. Hull. 11, V. S. Niil. Mum. -Wllllatiin, Syrpliiiliiv PLATE m. Ii.:il i,^ \i 310 lUJLLETIN 31, UNITED STATES NATIONAL MUSEUM. Bull. 31, U. S PLATE IV. Jw' 1. Catabomha pykastri Liiinc^, lu'ad of male, from in front; la, head of femalf. 2. Syki'iius Lksi:ki;iui Macq., wing. 3. Sykphusgkmcl'latus Mac(i., beadofmale. 4. DiDKA i.axa O. S., wing; 4«, head of male. 5. Mksoukai'ta (iEMiNATA Say, head of male; oa, hind leg of male. 6. Xantiiogramma .txiUALi: Loew, head of female. 7. Haccha aitiuxota Walker, wing. 8. Racciia i-i'sciPENNis Sa.v, head of male; Ha, the same, front view. 9. Haccha Haiusta Walk., head of female. 10. Nkoascia oi.omKSA Walk., wing; lOfj, head of male. 11. Si'iiKciNA Kkkmana Will., wing. 12. Si'iiKciiNA i.\FL-,scATA Loew, wing; 12a, head of male. 13. I'KLKi'OCEKA Pekgkandei Will., male. 14. Chaiaomvia .khi;a Loew, head of male; 14a, head of female. 15. Myiolepta MGitA Loew, head of female. 16. Sph.kuopii(M{ia cymndrica Say, head of male; 16a, abdomen of male. Bull. 31, U. S. Nat. Mns.— WillUtoD, Syrphidie. PLATE IV. \ I x\\ I u! 312 BULI.KTIN 31, UNITED STATES NATIONAL MUSEUM. PLATE V. 1. Myiolkpta vauipks Loew, win}-;; 1«, h.inl of male; 16, head of female. 2. Myiolepta BELLA Will., head of ft'iiialc ; 2a, wing. 3. RiiiNGiA NASiCA Say, head of male; :^«, wing. 4. EuGKNiAMY' \ KKUHUGiNKA Fallen, wing; 4a, head of male; 4ft, the same, front view. 5. HitACUYoPA NOTAiA O. S., wiMf^; ',a, head of female. 6. Uhaihyopa NOTAIA O. S., head of male. 7. iiUACiiYOPA MKUiA Will., head of feinahi. 8. VoLUC'KLLA Hagii .laMin., head of male. 9. VoLUCKLLA OBKSA Fabr., head of male. 10. Hacciia DiMiDiATA Fabr., wing, female. • ! i ! (^ \i me, froti(a|,. I^iiU. 31, V. S. Nat. Mu8 Williston, Syrphida). 1 '! «^ i - . , I fej ;»4 314 BULLETIN in, l\lTi:i) HTATK8 NATIONAL ML'SLIM. I'LATE VL 1. Voi,uc'Ki,LA VKsKTi.osA I'lihr., will};; \(i, liHiid of male. 2. V'OH;CKI,I,A SKXIM'XOTATA liOdW, wing. V<»M( KM.A iTsiiXA Mii((|., will};: :!((, head. Voi.UCKI.LA I ASCIATA .Mj(l!(|., will}r, Voi.icKLLA .MKXICANA .Miicij.. will};; iid, liejul of male. V()M:ckm.a k\ kcta Wall<.. wiii};; (i«. liead of male. Vom:('i:(,la. sp. 8. Voi.L'( i:i.i,a sp., lu'jKJ of male. 9. V. Aiicioi'iiii.A i-i-A(ii;A\s O, S. aiilciiiia of male; 1 mail rt> antenna of fenial( G. Tr.rrnocxKMis U 7. i:n xci'NTHs Walk.. vvin.u: :.«. Iirad of male: .-/i. liind jejrofi WMU IMAMS ir.NA\ F.ii llie. win;;; 7„. l„.;,d of iriale: 7/- '/'. antenna; Tc, hind I.m. of 0. r.tti sTAi.is ti;a\s\ KHsrs \V 0". EiiisTAiis vi: ied.. liead of nial 9. IIUI.STALI KioitfM Wied., liinrrir,A ckimicikisa \\ ii'd.. wiiif;; !«, distal cmkI of iriali' iil>(l(>mt!ii ; Ifc, hind li'u lit' Ilia!*' : If, li(Md of male. 2. Ill i.oi'iiii.rs SIMM. IS Macii., wiiifr. 3. Ili.i.oi'iiii.rs ( <.N((si()Mrs Will., head of fi-iiialc : ;irt, wing. 4. KiJ.oiMiii.is .M(ii>KsTis Will., head of fciiiiilc. 5. 1 III oiMiii.rs ciiiiVsosroMi's Wi(!(l., liiiid loKofmalc. 6. Ill i.oriiii.r.s i.i.ri's Locw, lu-ad of iiial<>. 7. Ili.i.oi'ini.us Mi'.MCANr.s MMf(|., head of iiiali' ; 7/), the ;miiie, front viow. 8. Doi.iosvuiMn s Rii.icvi Will., huad of malt'. 9. l'ri;i{Ai,i.ASTi';s TiioKACici's Loow, head of iiiah^ ; [Ui, hind h^^' <•' ""*'♦'• 11. .Maij-oia (.•imijiciiokmis I'all., hind leg of male ; ll«, head of male. 12. rKiciiocxi'.Mis i.rrnHATU.s O. S., lumi t^" of male; V2a, winj.;. 13. Mai.i.ota I'o.sticata Kal»i-.,hiiid lej; of male. 14. Mai. i.DiA Sackkn'I Will., wiiijj. v:t Ir! •Y\ i liiiU. ;)l, r.S. Nat. MiiH.— Willlslon, Sjrpliiila-. 1 PLATE VIII. ; U), hind W> ii 320 BULLETIN 31. UNITED STATES NATKJNAL MUSEUM. 2b PLATE IX. 1. TnKtDONrA cUHVn'K.s Wiod., wiiij;; Ik, liciid of iiialc, IVoiit view; 16, head of male: Ic, hind It';> (tt' ii^iih'; Irf, hind Ui^ of f(Mnuh>. 2. TuoPIDlA (/CADitATA Sii.v. wiiij;; "Jd. lit'iid of male; 'ih, Iiind loj; of male. 3. CiiioiuiiNA ANAi.is Mai (|., will};. 4. (.'moiniiNA iHMi;i!Ai.is Will., wiiiji ; Jr/. heal of mah'. 5. CuioKiiiNA x( mi.A Will., head of male. 6. (;hiu1!111.\a i.riMNA Will., Icmalf : tl/i, head «{' male. tVoiit view: ()6, the same, Bide view. 7. {Jmoitiii.NA r.MiiiiAiiM.s Will. 8. Mai.i.oia riMiiicii'oH.Mis, rcinii ItAUirA.s Walk., hind lej; of male. \ :;iill. .11, U. 8. Nat. Mim.— WllllHt •!'SI'- <»F NOIi'l'II ,\M!;HI'AN SYinMIID/K-Wiii i- tos. K U U A T A .\\\ii. liiM 111 11 (tin I ottiiiii till' ii'l tullinviiitt lii('( , aiii| iiiHcrt I*' ii( I la c I ; i'wvA^if. ^^*i i.i' 1 ;. lihi 'jli lipi •i:iiir' ri ml In luif. I.) Iiii4 -^ liiiiii I'liliiiiii, l«ii 'V sliiipfd v<»i\ V-sliii|i( il. 1 , liiu / till' 'Imsi' ri'ilil I nil- line 1.'} dcli' llu' cfiiti'lict lr(;i»i. IlillU' i (nil .'!;'/, liiH l!i ) I'lii h till. •i'IcciiikIi': lim '^1 for 'liiml r< inl froi.f t>l liiifi ficiin liMllmii. for ■•^'r^^!^ iciid iToli/.f: iiiic'^l from l.ollom ili'li' ''iliiiiilifi. (M lii.t' 2:1 tor 'tilticit' rt-iKJ liliii. (iT litn !< h'lini liotloiii, rtiiil rilu'»otloiii f >.• (ill ( ii;k!i' ii'IkI lililiMli. 102. liiif 10. Ii Ic '.>=.Hiili Aiii(;ii;i ( Siliim r V: line I » rend Doi-Kiiru of tlio ii.\ >i.ii!iiii.', iiiclMlli with il.i.kiT s:ii|)('s, itf.. imd .1 till- n. x! Ill- li'icr-h loi 'c t ' It s-li. I(l4 line II from holloiii, insert not rf fi oci III 11 7 fr olll lottoiii. I Icll •iliccUs iilld 120, liiio l>, for ''.viiijfr'' rciid size line H, for ''.viii-s' rciid hody. I2ii. liiif 1;'. ;or '-oiiii vvhiit in tillic lirowii' r< :id innpliKli liliick; mm. ill. tl (• I ottoiti of (:,<• )i;i].;f Jidd: I'.iirtliii Iri^'ificlti ififiot, 1. « issi, ;i;i;l. \Vii,-.hiii}itoii. i;{0, liio S for 'shilling' niid hronzo; lim 1'^, for 'Imsc' rind si' li-. 17;}, liiK 21. tor • fifth ' riiid loiirlli: line 2;i for ' bliii k ' icjn ini'liillie, 174 lliii- Ii'., lor (III null Kidt>, lie. niilcxd'pt the niiirgiii. 1.S2 liiii' 1(1 from lioiiom. for 'hlii^li iiwvn' ri iid I liie ili;». liiif 12. toi 'modi r.iti'l.v' iiad mm 1.. 213. liiif 2. for 'dusk-.' mid li.ulit; i.eM lim li>i 'fjiftiiisl:' rc»( Miiisli. iU, lir.e 27. for 'I'lii iii.-^ h ri'iid I liiish; lust liiii insert riietiillie I efnie Id.i. k line 7 from l.ettom. for 'Idiiek d !.ri,li/.e 22!>. line Hi. dele exi I'll the hind iiiiiile:-'; ilii i-iiiiii eorri etioii for the follouiiis; ^ [lecii .-< "Vi. iirnt line for (1 mm' read l(i mm. 244 I'.oti-, for 'iiii>!!nl;iiir reitd sp itled. t!')V line 12 from hottoni, for 'nvo' naiMoi-r. 2''"2, line ITi, for 'yelloiv' rend rid There .■ire 11 fev disireiiiiiieii c in erndi eii:-e l!:e one .civiii in the Kxidiiiiati one. the ri l( 11 111 I to the phitei-; 111 of I'liite- ic the eorree: ir rn.^ni -^ ■ ^z- ;f; ■r.. N l,^^ C .J 1.11. I t ..:' INDEX. Page. ierochordocodes 238 vittatna 239 illoprapta 96 emarginata 93 A'aota 97 obliqna 96 Aiicyclosyrphua 66 AjihritiB 3 auruleutaa U fulgeDB H cloboaus 4 rufl. 88 12 Arctophila 157 flagMUis 1J8 ABCitt Ill albipes 1 11 globosa Ill metallioa Ill nasnta Ill quadrinotata Ill Aseniosyrphus 183 bicolor 299 flaviscatatos 299 nigroBcntatua 186 ocnUfenia 186 At emnocera 134 B. Baccba 116 angusta — 123 •urinota 120 BabiaU in capitata 124 clayata 125 oocbenilUvont 125 cognata 122 conformis 125 coatata 122 cnbenHis 125 oylindrioa 125 dimidiata 125 elongata 123 fasciata 125 fascipennis 120 fraterna 125 fanebris 125 fuscipennla 119 infuscata 125 latinscnla 122 lemur I'^l lineata 125 Pac«. Baceha luctuosa 125 lugens 118 manuorata 125 noUta 125 nbscuricoruiH 123 parricoruis 125 ruflventria 125 sciitoUata 126 Tarobotias 117 torvtt 124 Baoha 116 Bracbyrnyia 'J09 liipiua 211 iiigripea 210 Brucbyopa 131 ferruginea 131 luedia 132 notata 132 vacua 133 Brachypalpus 221 npalius 297 amitbaon 297 cbrysitis 220 cyanugaster 218 frontosua 221 Morrisonii 221 parvus 222 pulcher 223 Rileyl 222 sorosis 223 verboaus 211 C. CaUlprobola 244 erea 223 plctipes 298 calorbina 258 Camptoneura 31 CartoayrphuB 38 frontosas 46 hoodianuB 292 infumatua 44 Invis 293 lumprurus 43 Catabumba 62 pyraatri 63 Cenogaster 184 Ceiatophyft 8 fuHcipenuis 4 Ceria 259 abbreviata 261 arietis 265 327 i 328 INDEX. ii 1'HJ{<". l'«i'iaDaphn«eus 2US LoewM •-!»• nigra t'dS nigripenniH '< K3 pedicellata 2tM pictula iSl ruflbaoiH 265 8cut«llatB 265 signifera 262 anperba 284 trideiiH 263 ( 'liHluomyia 126 OBrpa 126 Cheilosia 38 Cli'lOBia 38 ampla 285 Baroui 40 vapiUata 41! coniosa 44 cyaneacenu 4"? frontosa 46 h(«dien8i8 292 lajvis 202 laHio]ihthalma 40 leucoparea 45 luconiiu 62 Ingubris 45 uipripenuis 44 occidontalis 41 pallipes 41 parva 45 petulca 39 plumata 42 tristis 41 verHipellis 44 CUryaotoxuni 13 dcrivatum 16 flavifrons 17 integre 10 lateralo 14 ni)!rita 17 pubescens 15 ventricognm 15 villuHuliim 16 ypHilon 14 Chrysorhlainis 240 Chry»oclilainy » 240 bucCHta 242 crcusim 241 (lives > 241 nigripuH 242 CbryHogaster 31 Antitheus 33 Apisaon 291 belliila 36 bellulns 36 lata 37 latu8 37 iiigripett 33 nigrovittnta 34 nitida 35 nitidus 35 pictipeunls 37 ))ul<'he11u 35 P«ge. Chrygc ;a8ter Htigmata ^^ MigliiatUB ;|^ I Cbymophila nplendens ij I CnemiMlon ;i.^ I ConopH ffncus ig| fuscan 100 I gemmatus jn- pipiens 240 praciuctus c2 vulgaris loo Cope»tylum ifii Uuvlventrls 151 leutuiu 15J I limbipeuuis 152 ! marginatum 151 <'i'l'riiirt i:i9 ' pijiiins 240 ('riojjiora 217 ulnpez 220 cy aaella 218 cyanogastor 218 femornta 219 Cricii'hina 209 analig 214 armillata 213 deoon 210 hnmeralis 214 intersistens 212 Inpina 211 nigra 214 nigripcs 2i0 notata 21.') pictipes 286 scitula 21;'' umbrutilis "^12 verbosa 'Vi I Cryptineura ;)l liieroglypbica '.'.i Cynorbina 209, 212 D. Dfisymyi '. '2'X Didea (9 aU'idice 08 fasciata ^9 I'uscipeM 89 laxa 90 DiniuraspiH 3 podagra 4 Doliosyrplius 178 birtipes 179 Rileyi 178 seutollatua 179 Doroa at-qualis !"> Balyras -'0 flavipos •'■* insularis -'•'■^ E. Elopbilus l»' tenax 1«0 Enica «'• Epistropbo conjungens •*" Ki iophora 209 INDEX. 329 Page. jrjstalinnH 168 Erinlali" 158 leneas 161 agrorum 177 Blbiceps 172 albifrong 177 Antlroclus 165, 198 atriceps 169 atrinianus 173 basilaris '78 RaHiardi 168 liellardi 177 lirouHi 165 chalopua 198 obal}'beu8 162 cbry8ontomn8 190 cimbiciforniifi 202 coactas . 201 compactiiH 169 ciibensis 177 cnprovittatus 161 ilecisuH 189 dimidiatus 162 diminutuB 178 evpres 178 expictus 178 faniiliaris 178 fi;niiirntuB 178 HuvipeH 168, 202 frati^r 198 fill vipes 178 t'urcatua 178 tiiiadalapensis 178 (luudlachi 178 hirtus 162 hortorum 173 iinpositas 178 InciaaraliH 162 inflatus 178 inflexuH 162 inoruatns 175 intersiHtens 212 lateralis 178 latifrunn 164 L'Horinineerii 162 luuoniiii . 62 Mcigenii 165 mclanoHtomuH 168,202 mexiKikDiis 178 niontaniiH 166 DebuloiiiiH 168 nigcr 162 obHciiruH 175 occidentaliH 167 oestrifiirmia 176 opiilentus 183 paob ypoda 178 part'DH 177 pervagus 163 pbiladclpblcus 170 piloHna 174 pnmilus 170 pinguls 182 posticatus 201, 204 pratorum 183 piiRin 178 Paca £ri8tali8 rafo8cat4itiu 802 Sackenis 178 Baxornm 163 aeniicirculna 178 semimetallicuc 168 soniculaa 172 sincerua 161 SnuloaqnnDFis 178 atipator 164 temporalis 162 tenax 160 tcHtaoelcurnia 178 tlioracictia 171 traiiHverHuH 170 tricolor 178 trifasc.atua 171 iioiculor 178 iivaniiii 171 riuntoriiiu 171 vit'itus 170 /.(M.ltUH 170 Eriatalon.via 1,18 Euceratomj'ia no Pergandci 110 Eiigeuiimyia 130 t'erriigiiR-a IHI riifa i:ii EumeruH porcua 197 privernua 102 Enpeodea 04 volucria 05 Earhiniyia IH3 Eurliinamallota 209 lupina 211 metalhca ".'11 nigripea '.'10 Exochila 131 F. Ferdinandea 240 G. Glaarotricha yolucelloidea 301 H. Hadromyia 220 graL,di8 221 Eeliophilus 224 HelopbiliiR 183 Anauais 193 Androvlus .... 198 albicepa 206 ai cticua 185 bilinearis 295 borealia 185 chalepua !08 cbryaoHtoraus 190 couo^to;nu8 193 diatinctns 192 divisna 195 faaciatua 189 flavifaciea .. 197 t'ornialia 198 frater 108 glaciali.H 184 groenlatidicua 185 330 INDEX. ii 1 4'M Helophilus bamntUB lUi integer 195 189 188 193 186 192 197 196 196 HeriiiKia . IffitUS Utifrona lineatus mexicanuB luodfstus Novaj Scotia) obscurus obnoletua polygrammua 186 porcua 197 similia 189 atipatua 193 aiiaurraim 180 22 ImatiHma poatioatA iHchyroayrphus tricolor . Lepiilorayia . pyraatri calopna cincta . . Lepruniyia . Leucozona . calopus . luoomm. MelanoHtoma. . . -JOI •-'01, JU-J «« 73 L. LaaiopIiticuH 62, 66 64 31 31 299 81 31 61 62 i M. HaUota 201 atrox 202 l)arda 201 Bmitias 202 liipartitH 205 cimbUjlfonnis ;iO'J dentipoB 202 niilestformls 180 poaticata 201. 202, 204 Sackeni 204 Melanoj^asti^r ocbripea 45 niflpea 801 46 60 54 54 53 anguatatuin anthraooidoa annulifemm bicmciata bicruciatam 53 eoBrnlescens 49 ornciatum 54 oyaneocincta 302 graciliB 60 roaciilosa iiipllina.. nu-Uinuui ubHuiira obBcunim pachytaraia pictipea 50 49 49 48 48 54 52 priiinnaa 49, 62 Mtjluioatoma pnilnosnm .,• quadrinotatum j. I roBtrata -A roatratum .^,.1 ruflpea ,jj Bcalaria 4,, ^1 tigrina . ,, tigriuuDi ,- trichopus -,, MelitbruptuB iq, pictua iQj acriptua jq^ Merapioidua 343 Pergandei hq Tilloans J43 Merodon balanua .jq] barduH ^ji Bautias juj bipartitUB 205 curvipes 'job MeHugramma q^ geminata uy< parvula gg planiTeiitria 100 Meaograpta gg auchorata 104 arcifera 104 aurulenta 102 baailaria 104 biatriga 300 bicinta 300 Boaoii 103 oircamdata 300 coaleacens 294 corbia ... 2M uupriDU 300 eotypim 104 ^I'lninata lOi lieraldica 300 lacinioaa 104 lacrymuaa SCO linearis lot macnlata UW marninata 100 niinuta 104 mu 300 multipoDctata 104 pallipea 300 parvula 99 poecilogaatra 104 polita 98 pulchftlla 104 aanbiridicepa .'-00 aubannulata 104 trilobuta 300 variabilis 104 Mesophila fuacipenniB ( Mioraptoiiia 2*^4 Microdon I Agapenor 4 aurit'ex 9 aumlentus U balioptjrua 5 coarctatua ' INDEX. 331 Page Kicrodon cotbumatum 6 cothurnatus 8 eaglosaoides 11 falcatns 0 fulgcus 11 IbsripeoniB 4 glol>U8US 4 graoilU 12 intequallB 12 l«3tU8 12 limbos 8 niarmorutum 10 miinnoratiis 10 pactiysty lum 8 pulcber 5 ruflcrus 7 rutipaa 12 scituluB 10 tristis 6 trncbilus 9 MUeeia 254 acuta 180 amitbaoo 297 aualis 214 ania 182 Bacuntius 200 baida 168,201 bombylans 250 crucigera 180 Dxcentricu 251 hicniatodes 227 ifjnava 231 linibipennls 255 iieiuonim 231 notata 215 ornata 255 pigra 227 pipiens 240 quadrata 283 ruflcrus 181 verbosa 211 virginiensis 255 Zetterstedtii 250 Mixogaster 283 mezicanus 283 Mixti'Diyia 244 cpbippium 249 quadrifasciata 248 Mu)io aui'ulentua 11 blcolor 18 globogus ! nigrita ■ < IkluBca cincta 182 lappona 154 lucornm 02 nioUina 49 pipicDH 240 porclna 160 pyraetri 63 ribesii 77 ro8» 63 soripta K' Burinaffltinsis 173 tenaz 160 tomentoaa 211 PagB. MuBca virginienBia 255 My iob'pta 127 »rca 126 bella 128 cioereo-vittata 133 I luunlata 128 nigra 124 Btrigilata 127 varipcH li:? N. NauHigastor 21 piinctnlata 21 Neoascia lU nlblpoA U" diHtinctu 112 globomi Ill UHitallicii 112 natiuta 112 quadrinotata 112 O. OcyptamuB 1 16 confomiig 110, 125 diniidiatuB 125 fascipenniB UO fratemua 125 fenoatratUB 302 funobria 125 fascipeunia 119 infuacatua 125 latiuaculua 122 longlVL-ntris 119 mflvontria 125 Ornidia 134 obeaa 143 Orthoneura 31 bieroglj-pbica 35 nigroTittata 34 uilida 35 pictipenuia 37 ainuoaa 34 uatulata 83 P. ParaguB 17 leueua 19,85 albipea 20 anguatifrona 17 arcuatua 18 auricaudatua 20 blcolor 18 coadiinatua 20 diniidiatua 20 diapar 20 fomoratua 19 ha'morrhouB 19 nigritia 20 (ibHcuriia 19 punctiilatua 18 quadiil'asfiatun 248 ruflcauda 18 aigillatua 19 txniatua. 18 t«8taccus 18 tiblalia 19 triangalifema 19 332 indp:x. ii Pelecooera 110 latlfronH llo Pergamlel 110 HCOiVoidCH 110 tricincta Uo Peulum '22 Phalucromyia inolanoiiiina '201 vicina 297 Wpi/.a 22 all)i|)il(i8a '.'98 artuiiiiH 27 liiicoata 110 ralcaratu 24 L'ra8Hi]ii>R 291 (llvisa 29 femurnliH 26 feativa 27 t'rauiita 20 Innata 27 iniiilofita 24 ui'jribarlm 25 nit{ri|iil()sa 28 (imata 27 piHtai'oidtH 29 pixtica 20 piibc'BceDS 23 piiella 27 piilvbdla 29 ra(li(Him 26 salax 25 tibialis 10 Pipizella 22 Plagiocera 179 ci icigcra 180 Platycbcirus.' 56 ocy ni i 55 poltatUB 58 PlatychiniH 50 cbivtiinoduR 50 cillatus 60 by porborpiis 57 iinniarfiinatua 50 Nasd 61 Pacilus 61 poltatu« 58 (Itindratua 57 sc.inibus 50 PixDta 220 alopt'x 220 ryani'lla 218 prandis 221 I'olydonta 205 bioolor 206 nirvipes 206 Hriomcnis 178 Psarusornatus i!57 qiiadnl'asclatns 248 Pwilnto 30 buccata 30,291 liafidipennis 30 Pt.i iillastPs 108 littiratas 200 tlioracicus 198 Pteroptila 179 uiucta 182 1',.-,. Pteroptila vruclgera ,,. dt'cora , „. (ipulouta .„.. pratonim ■(,„ nitirriiH ,g. ?• iiata ]g, Pviopha'ua J ocynii 55 roHanun .5 It. Khiimia y,^ lorinniuoa jjq luiHlca 130 Roninlooayipbaa villoRUB 3(jq S. SaliiiDKoguBtor .19^ ancliorata — jgjj cotbiirnata -MtB Scaiva Bu abliiflviata hi aftiuis (j4 albiniana .-,u ai'cuata eg diniidiata i'j5 cDiai'i^iiiata 93 tiemiiiata m-j liypei'borea rj luppouica (Mj liiubata gg luai'ginata 1 no lupUiua 49 obli(|iia 90 ocy mi ."),"> poltata r>8 polita n« pyrastri 64 <|iiadnitii 57 libt'HJi 77 rosaniin 55 scalaiis 49 8ii:;^ta 107 topiaria 79 transfucii (54 Sonognster 238 coBriiI('«(^t>n8 239 Comstocki 239 Seric'oniya %. .. 153 Sericomyla 153 bifasoiata 154 cbaU'opyga 156 cliiysotoxoide8 157 alia 157 lapiiona 154 liinbipeniiiB 157 iiiilitaris 155 soxfasciata 155 Soniula 209.216 docora 210 Spati;:a8ter bacxboides '17 Spbi'coinyia -56 hrevicornis 258 Pattonl 258 vtdpiformis -57 vittata 2.5T \ [; 1 INDEX. 333 Page. SphfCina • 13 Infiiacata 114 Eoeniann 1 1:< lobnta 115 ruflvi-ntrig 114 Sphierophoria 104 Ba cyliudrica 106 (labia 108 fulvicftuda 109 bieroglyphica 109 InfumBU 109 lueDthastri 109 iiielani)8a 1C6 micnira 107 uaituta 109 pacli.vpyga 109 pitta 1U9 picticauda 109 p.vrrhina 108 acripta 107 Htiigata 109 Hiilphuripes 106 Sphixra 254 falvifroDH 255 Sphiximorpba 259 Spilomyia 244 bnmbylans 250 <>phippium 249 fuHca 246 baiuifera 247 interrupta 246 I it.urata 245 loDgicorois 245 piillipi'g 249 pleuralis 247 quadrifuHCiata 248 Syrif t a 239 pipiens 240 mexicana 240 SyrphUB 66 abbreviatus 81 osneus 161 affiniH 64 agiliH 88 agnoii 68 agrornm 177 arcnatua 68 lapponicusbipnnetatus... 69 lapponicua 69 adolcHceua 71 amalopiH 69 americanna 82 Amiaaaa 119 anchoratus 104 Alcidico 68 Antiphatea 88 urcuatus 68 aroucinctua 68, 69 baeilaria 104 bicolor 18 bombylana 250 Boacii 103 cimbiciformia 202 Pne«v Sy iphtia ciurtolliia 78 cingulut ulua 08 clavatua 125 coali-HCt'DH 294 I'orbix 204 colludc^DH 88 con t Umax 71 corollii' 82 oylindricuB 128 deliueatua 88 diHji^ctUH 72 dixjiiurtag 72 diinidiutua 125, 294 ditiicuHua 96 diversipoa 76 «cty|)iiH 104 oiiiaiginatua 03 CHurii'UH 137 fU|iflliitn» 88 «!XCl8U8 ...'. 81 fiiiiii]H'nuia '.'93 fiiscanipeDoia fi? geminatua 102 geuiculatna Hi goDualia 86 grauilitaraus 55 r dBiilaDdicas 185 UtirgKg 103 guttatug 85 liccticiiH 98 boi'tornm 173 hypcrboreaa 57 infiiinatua 109 intRrrogana 102 intrudeng 70 iria 49 jactator 88 lappona 154 lapponicua 68 LeHiieiirii 80 linibatus 88 limbi ventria 294 lobatug 55 lotua 75 lucorum 62 macutifrona 88 luacnloaua 50 marginatua 100 mellinua 49 melliturgna 49 inelarlua 49 mentalia 72 miniituH ^ 104 niutuua 88 Xaso 61 nigripeg 89 nigrita 17 Doctiliicua 53 obegiig 143 obliquiia 06 o.bHturua 48 ochrogtoma 293 orynii 55 OBBtriformig 176 opiuator 83 334 INDEX. >r' 1 ByrphiiA paciluH 61 panxlllns 74 perpallitlan flS pelUtiiB 68 pbllndelphlon^ 77 pictuH .. 10ft pifter 'ft profuHas 216 protritas 77 pulchellns 1 04 pyrMtii 63 quMlratna ■17 quadrifaacUtnfi f*0 quinqnvliiubittii < >*' Qulntlim 100 rodaca 11» radiatus -. «» rectos — 77 ribeaii "7 roMmm 55 scalariB 49 Mcarifems 96 aexguttatus 85 ■criptns 107 aignatns 96 •implex 87 ■teKona 89 •odalis 74 anlphnripes IOC taraatna 294 tenax 160 topiarlns 79 tonrna 79 tranaftigas 63 trichopas 51 trifasciataa 355 yelntiniu 73 veaicnloauft 141 Tioetonim 171 nmbellatamin 85 nnicolor 63 xanthoatomns 80 T. Tcmnocera 134 megacephala 146 pabemsens 140 pnrpnnwMiu 148 aetigera 147 nnileota 150 viridultt 150 Temnoatoma 249 seqaale , 253 teqnalia 253 alternana 252 Balyraa * 250 bombylans 250 excentrica 251,263 excentricnm 251 obscara 260 Temniwtoniii pictuliim i)-. veniiKtum jjj TvuibOGncfnia |gj, ISacnntiaa qq litaratua jqq ToxotnorQH ^ f^eminatns igj notatua jo.^ TriRlypbiiH rabileatua y piiheRcena ■<:{ Ti'iiidoDta MQn curripea •^na Tropitlla '_>(k- albiatylnm 0,17 oalcai-ata juh mamlUnta 2O8 qnadrata 207 Tv/.fiiliuuHia lib vt'N|iifonnia 'jst U. Obrist*') V. Vdlucella 134 ubdnminaliK 150 Anna y.m ametbyaliDa 150 •perta. . . apicaJiH . avida asnrea . . oaatanea , 150 m 139 143 ISO chBtopbora UO cbalybeaoena. 150 Comstooki 138 dlapar 137 pRnrienn 137 mexicuna 137 engenia 139 eveota 136 faoialia 137 faHciata 145 fnlvioomia ISO HagU 147 iaabellina 140 lappona 154 laU 150 marginata 151 MaximUiani 137 niega«epbala 146 mellea 160 metailifera 137 mesioana 137 nlgrifaciea 150 obewk 143 picto. ISO plnmatu 136 postioata 150 pnbeacena 148 pnlcbripea 150 pnrpnraaoena 148 pnrpnrifera 150 pneilla 144 aatur 142 scxpanctata W i r INDEX. 335 Page. Tolucellatau 148 tibUlia 180 tiioinoto ISO trlatU ISO nnileoU ISO vaiiegkUk ISO varUni 150 vesiooloaa 141 Tlotoria 145 violaoea 160 Tiridnia ISO X. laothogrunma 01 nqnalia M dlTlaa 02 emargliiata 03 fellx 01 flavipes 04 lylota 224 npalias 207 analU 226 aufnistlTentria 231 annnlifera 229 arooata 288 Antbreas 235 badia 212 barbata 238 Baton 229 bicolor 229 bUlMoiata 231 ehalybea 288 Pac*. Xylotu roloradouilH 280 orauipea . , 227 cnrvlpea 232 t'jDDcida 229 eloDgata 234 flbdfroDs 234 flavltibla 22g femorata 232 fraadaloaa 230 heinatodea 2*27 llbo 220 marginalia TM metalllca 235 metallifera 236 nemomm 231 notba 228 nlgripes 231 obsonra 233 paob} ara 237 pigra 227 pipiena 240 pretioaa 237 proxinia «. 240 qnadrata 207 qnadrimaonlata 229 aatanica 232 anbooatalia 238 aabfaaolata 230 veoora 233 tnberana 225 Xylot^a 127 J\ \ !