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 Lasiopogon bivittatus Loew Lasiopogon bivittatus Loew, 1866: 33 . Recognition characters: Black species, length 8–12 mm ; mystax black; thorax black pilose with two narrow, widely separated black stripes; scutellum black pilose; abdomen polished black with the first segment almost totally black and the posterior sides of the remaining segments broadly grayish white pruinose; surstyli of male black with a broad, semicircular emargination above at apex; legs black, bristles and pile of the tibiae and tarsi and apical 1/3 of femora black; rest of bristles and pile of femora blackish white; femora slightly grayish pruinose. Distribution: FREMONT: near Lander, 1,524 –2,438 m ( 5,000 –8,000 ft ) ( RM ) ( OS , CATIC ). Habitat: Wheatgrass-needlegrass shrub steppe shrub and grassland vegetation type . Ethology: Nothing known. Prey: None known.