Cyrtopogon praepes Williston

Cyrtopogon praepes Williston, 1884: 12 .

Recognition characters: Black species; length 11–12 mm; third antennal segment black; mystax light yellow, black on oral margin, thorax light pollinose laterally, gray and brown pollinose dorsally, scutellar setae black, wings nearly hyaline; abdomen black, sides of first two segments white pilose; legs deep black, dorsal part of fore tarsi with dense silvery pile, middle of hind tibiae covered with golden red pubescence.

Distribution: TETON: Grand Tetons, 4 July 1942 (CPA-UM). YELLOWSTONE NATIONAL PARK, Tower Falls, 23 June 1941 (CPA-UM).

Habitat: Douglas fir forest vegetation type.

Ethology: Nothing known.

Prey: None known.