Loew, 1847: 516 Cyrtopogon albifrons albovarians C. auratus C. banksi C. bimaculus C. caesius C. callipedilus C. curtistylus C. fumipennis C. glarealis C. hollandi C. infuscatus C. inversus C . martini C. montanus wilcoxi C. platycaudus C. plausor C. praepes C. pulcher C. rufotarsus C. sabroskyi C. willistoni Robber flies (Insecta: Diptera: Asilidae) of Wyoming, USA with keys to genera and species Lavigne, Robert J. Dennis, Steve Zootaxa 2019 2019-08-30 4662 1 1 126 3YZD 468713 Loew Loew. 1847 [151,368,1209,1235] Insecta Asilidae Cyrtopogon Animalia Diptera 61 62 Arthropoda genus     Cyrtopogon  Loew, 1847: 516. Species found in Wyoming:  Cyrtopogon albifrons, albovarians, C. auratus, C. banksi, C. bimaculus, C. caesius, C. callipedilus, C. curtistylus, C. fumipennis, C. glarealis, C. hollandi  sp. nov.,  C. infuscatus, C. inversus,  C. martini  sp. nov.,  C. montanus wilcoxi, C. platycaudus, C. plausor, C. praepes, C. pulcher, C. rufotarsus, C. sabroskyi, and C. willistoni.   Key to Species[adapted from Melander (1923b); Wilcox & Martin (1936)]     1 Scutellum convex, mostly shining, sometimes with a transverse spot of pollen at the base; in profile the face usually strongly gibbous and the antennae usually situated at about three-fourths the height of the head; more densely pilose and less pollinose species.............................................................................................. 2  - Scutellum more or less flattened and largely or entirely pollinose; in profile the face usually not so strongly gibbous and the antennae usually situated at about one-half the height of the head; less pilose and more densely pollinose species........ 16   2 Third antennal segment orange, yellowish red or red; tibiae and tarsi more or less reddish............................ 3  - Antennae wholly black................................................................................. 6    3 Maleabdominal tergites 2–4 with dense tufted yellow or black pile; mystax yellow, black below or on margin............ 4  - Male abdomen without dense pile as above; mystax all or mostly black.......................................... 5   4 Abdominal segments 2–4 with tufts of yellow or golden pile; and with posterior silver pollinose bands; mystax yellow above, black below; first two antennal segments with black pile.......................................  Cyrtopogon auratus  - Abdominal segment 1 sides and whole of segments 2–4 reddish-yellow pollinose; mystax yellow, with oral margin broadly black setae; first two antennal segments yellowish pollinose................................  Cyrtopogon platycaudus   5. On males, lateral setae on abdominal segment 1 long, straw white, segment 2 long, brown, segment 3 short, black......................................................................................  Cyrtopogon martini  sp. nov.  - On males, lateral setae on abdominal segments 1–3 yellow to yellowish white, remaining segments black; female all lateral setae on abdominal segments yellow to yellowish white........................................  Cyrtopogon pulcher   6. Abdomen with dense, erect pile at least covering the dorsum; segment 1 reddish yellow, segments 2–4 orange...............................................................................................  Cyrtopogon curtisytlus  - Abdomen without dense pile on dorsum as above............................................................ 7   7 At least the last two segments of the middle tarsi of the males with a broad disc of black setae; male fore tarsi silvery pilose above; face at the antennae subequal in width to the width of one eye, strongly gibbous.............................. 8  - Middle tarsi of the males without disc of black setae; face usually narrower than the eyes and not so strongly gibbous.... 11   8 Pad of black setae on the middle tarsi confined to the last two segments and very broad, total width of hairs about six times the width of the segments; silvery white setae on the male fore tarsi parted on all segments...........  Cyrtopogon callipedilus  - Pad of black setae on the middle tarsi not much more than three times the width of the segments and not always confined to the last two joints; silvery setae on the male fore tarsi not parted on all segments...................................... 9   9 Setae of the abdomen and thorax in both sexes yellowish-white.................................  Cyrtopogon plausor  - Setae of the abdomen and thorax always at least partly black in both sexes...................................... 10   10 Joints 1–5 of male fore tarsi with a narrow crest of silvery setae not noticeably expanded apically; legs entirely black; setae of the body mostly black, first two abdominal segments yellow setae; hind femora yellowish setae........  Cyrtopogon praepes  - Silvery setae on male fore tarsi confined to joints 2–5, noticeably expanded apically; tibiae and tarsi usually reddish but sometimes entirely black; usually more than the two basal abdominal segments pale setae hind femora black setae................................................................................................  Cyrtopogon willistoni   11 Wings of the male with a large apical brown cloud and a smaller cloud covering the apex of the anal cell, female wings more or less darkened in the same regions; pleura largely shining black...............................  Cyrtopogon bimacula  - Wings not bimaculate; pleura more extensively pollinose..................................................... 12   12 Tibiae yellow to red or black, and tarsi pale yellow to red or reddish brown....................................... 13  - Legs black, hind tibiae sometimes dark reddish............................................................. 14   13 Meral pile entirely black; tibiae black, tarsi reddish brown..............................  Cyrtopogon montanus wilcoxi  - Meral pile white or partly white; tibiae and tarsi pale yellow to red...........................  Cyrtopogon albovarians   14 Fore tarsi of males not silvery to white pilose above; fasciae of abdominal tergites 2–4 entire or nearly so.............. 15  - Male fore tarsi silvery to white pilose above; fasciae of the abdomen rather broadly interrupted on at least segments 2–6......................................................................................  Cyrtopogon rufotarsus   15 Setae on antennal segments black; mystax largely white; pile on female abdomen black..............  Cyrtopogon inversus  - Setae on antennal segments white; mystax white above, black on sides and below; pile on female abdomen white......................................................................................  Cyrtopogon hollandi  sp. nov.   16 Pollinose fasciae on first abdominal segment entire......................................................... 17  - Fasciae on first abdominal segment narrowly to broadly interrupted............................................ 20   17 Bristles of tibiae largely black.......................................................................... 18  - Bristles of tibiae largely white.......................................................................... 19   18 Scutellar setae brown; haltere stem yellowish, knob rosy; mystax white...........................  Cyrtopogon caesius  - Scutellar setae sparse, black; haltere stem brown, knob yellowish white; mystax black............  Cyrtopogon fumipennis   19 Scutellar setae white; haltere stem dark brown, knob yellow..................................  Cyrtopogon sabroskyi  - Scutellar setae black; haltere stem brown, know light brown..................................  Cyrtopogon infuscatus   20 Fasciae on first abdominal segment broadly interrupted, wings hyaline.............................  Cyrtopogon banksi  - Fasciae on first abdominal segment narrowly interrupted, wings tinged with brown.................  Cyrtopogon albifrons