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 Pogonosoma ridingsi Cresson Pogonosoma ridingsi Cresson, 1920: 214 . Recognition characters: Black species; length 15–17 mm ; mystax black with long white setae above and beside; thorax black, gray pollinose laterally; scutellar setae white; bristles black; wings brown, abdomen black, setae black except for white setae laterally on segment 1, dorsally on segments 1–2; legs black, bristles mostly black, setae mostly white, patch of black setae anteriorly at apex of femora. Distribution: FREMONT: Muskrat Creek, Shoshoni, 22 June 1964 ( FRH , RJL ). Recorded from Wyoming by: Geller-Grimm (2018) . Habitat: Sagebrush steppe shrub and grassland vegetation type . Ethology: Nothing known. Prey: None known.