Cyrtopogon caesius Melander, 1923

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 : 66

Cyrtopogon caesius Melander

Cyrtopogon caesius Melander, 1923: 112 .

Recognition characters: Blackish species; length 9–10 mm; third antennal segment black; mystax mixed white and black; thorax gray pollinose; scutellum white pollinose, scutellar white, marginal setae black; abdomen black, abdominal fasciae wide, gray pollinose, lateral pile on segments 1–6 white; legs black, pile on femora and hind tibiae white.

Distribution: Recorded from Wyoming by Wilcox & Martin (1936) as follows. SWEETWATER: Green River, 2 July 1920, F. 4737, elevation about 1,859 m (6,100 ft); Rock Springs, 28 June 1920, F. 4738A, elevation about 1,981 m (6,500 ft). Also, recorded from Wyoming by: Cole (1969); Fisher & Wilcox (1997); Geller-Grimm (2018); Martin & Wilcox (1965).

Habitat: Sagebrush steppe shrub and grassland vegetation type.

Ethology: Nothing known.

Prey: None known.