Cophura brevicornis (Williston)

Taracticus brevicornis Williston, 1883: 22 .

Recognition characters: Grayish black species; length 8–10 mm; mystax black, limited to oral margin; thorax gray pollinose; wings with brownish aspect; scutellar bristles 2, black; abdomen black, lateral apical corners of segments 2–5 silvery pollinose; legs brown, setae short and white bristles black.

Distribution: YELLOWSTONE NATIONAL PARK: Mammoth Hot Springs Camp, 23 July 1957 (AD & HD - CU); 9 July 1930; 1 July 1932 (AMNH). Recorded from Wyoming by: Geller-Grimm (2018); Melander (1923a) (YNP).

Habitat: Douglas fir forest and sagebrush steppe shrub and grassland vegetation types.

Ethology: Nothing known.

Prey: None known.