Cyrtopogon hollandi Lavigne & Dennis,

Lavigne, Robert J. & Dennis, Steve, 2019, Robber flies (Insecta: Diptera: Asilidae) of Wyoming, USA with keys to genera and species, Zootaxa 4662 (1), pp. 1-126: 68-69

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Cyrtopogon hollandi Lavigne & Dennis

sp. nov.

Cyrtopogon hollandi Lavigne & Dennis  sp. nov.

Holotype male: Length 8 mm.

Head: black; face densely grayish yellow tomentose, frons and occiput sparsely grayish yellow pollinose, denser on eye margins; palpi and proboscis black. Mystax white above, black on sides and below; setae of frons, ocellar tubercle, upper occiput, entire eye margin, second palpal segment black; beard, setae first two antennal segments, first palpal segment and most of proboscis white. Antennal segments black; first segments 1 1/8 times length of second; third 1 1/3 times length first two segments together; style with apical spine one-half length third; antennal segments without bristles.

Thorax: dark brown pollinose with pair of lighter brown center stripes; Spot of golden pollen beside center stripes just in front of transverse suture. Setae of pronotum black dorsally and white laterally; setae and bristles of mesonotum and scutellum black; 2 notopleurals, 3 weak supraalars, and 2 post alars; setae of mesonotum subequal in length to third antennal segment, those of scutellum being subequal to entire antenna. Scutellum largely shining black with spot golden pollen at base. Pleura and coxae golden tomentose; setae of proepimeron (propleura of authors) black above, white below; those of mesopleura, and katepisternum (sternopleura of authors) black, merals black.

Wings: lightly infuscated. Veins dark brown, macrotrichia on costal vein black; the anterior cross vein 2/11 length discal cell. Base and stem of halteres black, knob yellow.

Legs: femora black; fore- and mid-tibiae black, apical two thirds hind tibiae reddish brown; tarsi reddish brown, bristles black; setae of femora and tibiae long, erect, those of tarsi short; setae of fore and mid femora black except those posteriorly white, setae hind femora largely white except those posteriorly and apically black; setae fore- and mid-tibiae black, those of hind tibiae largely white except anteriorly black; setae of tarsi black except dorsally on joints 1 and 2 of hind tarsi white; fore tibiae and metatarsi anteriorly, hind tibiae at apex and metatarsi posteriorly with short golden pile. Apical half of claws black, brown basally; empodium brown; pulvilli straw white.

Abdomen: shining black, tergites 2–4 with narrow posterior gray pollinose fasciae complete, broadly interrupted on tergite 5, small spot of gray pollen on posterior corner sixth tergite. Setae laterally segments 1–3 long, black anteriorly, white posteriorly, those on dorsum long black and dense; setae laterally on remaining segments shorter, mostly white, those on dorsum sparse, black and short.

Genitalia: shining black with short black setae except for dense tuft of straw white setae at apex of cercus.

Female: Length 9 mm. Similar to male. Few black setae dorsally on second antennal segments. Setae of mesonotum largely white behind transverse suture; post alar bristles white. Base scutellum rather broadly golden pollinose, much more so than male, setae arising from pollinose spot white. Setae proepimeron and katepisternum white, those mesopleura mixed white and black, merals white. Abdominal tergites 2–5 with narrow posterior gray pollinose fasciae complete, broadly interrupted tergite 6, 7 bare; both lateral and dorsal setae white; tergite 8 reddish brown basally, apical spines reddish brown; setae genitalia white. Hind tibiae reddish brown except apical 2/11 black anteriorly; fore and mid tarsal joints blackish dorsally; setae joints 1 and 2 hind tarsi black.

Holotype male: Albany County, Wyoming : Pole Mtn., 20 June 1964 / R.J. Lavigne, F.R. Holland (deposited in USNM). 

Paratypes male: Albany County, Wyoming : Pole Mtn., 20 June 1964 / R.J. Lavigne, F.R. Holland (deposited in USNM)  ; female, Pole Mtn. , 20 June 1964 / R.J. Lavigne, F.R. Holland (deposited in CAS)  ; female, Pole Mtn. , 24 June 1964 / R.J. Lavigne, F.R. Holland (deposited in CAS)  ; females, Pole Mtn. , 24 June 1964 and 25 June 1964 /F.R. Holland (deposited in the senior author’s collection)  .

Paratype female: Albany County, Wyoming : Pole Mtn., 18 June 1964 / R.J. Lavigne, F.R. Holland (deposited in USNM)  .

This new species runs to C. inversus Melander in Wilcox  & Martin’s (1936) key. The latter species is easily distinguished as the males have black setae on the antennal segments and the pronotum has white setae. The abdomen of the female of C. inversus  is almost completely covered with black setae and lacks the gray pollinose fascia on the sixth tergite. The species is named in honor of Dr. Frank Holland who has provided a number of new distributional records for Wyoming robber flies as well as collecting part of the type series.

Distribution: ALBANY: Pole Mtn., 18 June 1964 ( RJL, FRH), 20 June 1964 ( RJL, FRH) (four specimens), 24 June 1965 ( FRH), 25 June 1965 ( FRH).

Habitat: Pine-douglas fir forest vegetation type.

Ethology: Nothing known.

Prey: None known.


Smithsonian Institution, National Museum of Natural History


California Academy of Sciences