Robber flies (Insecta: Diptera: Asilidae) of Wyoming, USA with keys to genera and species Author Lavigne, Robert J. Author Dennis, Steve text Zootaxa 2019 2019-08-30 4662 1 1 126 journal article 25823 10.11646/zootaxa.4662.1.1 7070ef91-15db-4b7e-a87d-72e7b0bdb192 1175-5326 3383448 366A1E81-946C-4ED4-8A65-C51151FE87CC Ospriocerus aeacidinus (Williston) Stenopogon aeacidinus Williston, 1886: 289 . Recognition characters: Gray and orange species; length 14–20 mm ; mystax white; thorax grayish yellow pollinose; meron with fine short setae; wings brown; abdomen yellowish red; segments 1 and 7 black as is segment 6 laterally; legs black to reddish black, bristles and setae black. Distribution: FREMONT: near Lander, 1,524 –2,438 m ( 5,000 –8,000 ft ), July 1895 ( RM-UK ). Recorded from Wyoming by: Geller-Grimm (2018) . Habitat: Sagebrush steppe shrub and grassland vegetation type . Ethology: Nothing known. Prey: None known.