Lasiopogon cinereus Cole, 1919

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 : 113-114

Lasiopogon cinereus Cole

Lasiopogon cinereus Cole, 1919: 229 .

Recognition characters: Gray species; length 7–11 mm; mystax black; setae and bristles of mesonotum black, postpronotal setae black, sometimes with a few white setae intermixed; metanotal bristles black; scutellar setae and bristles black; abdominal tergites brown pollinose with gray fasciae confined to apical 1/4; surstyli of male black, gray pollinose; dististyle compact; legs black, gray tomentose (see L. aldrichii ). Wyoming specimens differ from those on hand from Washington in that the setae on the frons of the former are black whereas those of the Washington specimens are brown; the short setae dorsally on the hind femora of males is white in Wyoming, black in Washington, as well as slight variation in the structure of the dististyle.

Distribution: BIG HORN: Shell Canyon. FREMONT: Little Popo Agie River, Hudson, 21 Aug. 1964 ( RJL, FRH); near Lander, 1,524 –2,438 m (5,000 –8,000 ft) ( RM) ( OS, CATIC). PARK: Pahaska Tepee, Shoshoni National For., 21 Aug. 1964 ( RJL, LJS), 11–13 Aug. 1964 ( RJL, FRH); Pahaska Tepee, 12 Aug. 1964 ( RJL) (two specimens deposited in the NMSCA); Pahaska Tepee, 13 Aug. 1964 ( RJL, FRH), (specimen in USNM); Middle Creek, 8 km N of Pahaska Tepee, 12 Aug. 1964 ( RJL, FRH). TETON: Pilgrim Creek, Grand Teton National Park, 14 Aug. 1964 ( RJL, FRH), 17 Aug. 1965 ( RJL); Teton Overlook, Teton National For., 14 Aug. 1964 ( RJL, FRH); Jackson, 14 Aug. 1964 ( RJL, FRH). YELLOWSTONE NATIONAL PARK: Thumb Station, Aug. 1931 ( Cole & Wilcox 1938) (VMT - BYU). Recorded from Wyoming by: Adisoemarto (1967) (near Lander; Thumb Station, YNP); Cannings (1994), (2002) (Grand Teton National, Park), (2013); Cole (1969); Cole & Wilcox (1938); Evans (1970); Fisher & Wilcox (1997); Geller-Grimm (2018); Lavigne & Holland (1969); Martin & Wilcox (1965).

Habitat: Douglas fir forest, saltbrush-greasewood shrub, and sagebrush steppe and wheatgrass-needlegrass shrub steppe shrub and grassland vegetation types. Rocky substrate adjoining moderately flowing streams (see Lavigne & Holland 1969).

Ethology: Rests on and forages from exposed rocks in streams and from soil, rocks and logs on the banks of streams (see Lavigne & Holland 1969).

Prey: DIPTERA , EPHEMEROPTERA , TRICHOPTERA (see Lavigne & Holland 1969).