Martin, 1957: 378 Robber flies (Insecta: Diptera: Asilidae) of Wyoming, USA with keys to genera and species Lavigne, Robert J. Dennis, Steve Zootaxa 2019 2019-08-30 4662 1 1 126 3TP6L Martin Martin 1957 [151,481,1653,1680] Insecta Asilidae Leptogaster Animalia Diptera 97 98 Arthropoda species hesperis     Leptogaster hesperis  Martin, 1957: 378.   Recognition characters:Grayish black species; length 11 mm; mystax pale; thorax black, gray pollinose, male with “V” shaped medial stripe, female with parallel median stripes, indefinite brown lateral stripes; scutellum gray pollinose; wings with more microtrichia apically than basally; abdomen black, dorsally brown pollinose, laterally and ventrally gray pollinose, posterior gray pollinose bands on segments 1–5, short erect sparse setae more abundant laterally and posteriorly on segment 2; fore and mid legs yellow; posterior femora yellow, reddish brown apically, tibiae yellow basally, reddish brown anteriorly.  Distribution:SHERIDAN: Sheridan, WANG, LTA, 2001a ( CSU, GMAD).  Habitat:Grama-needlegrass-wheatgrass vegetation type.  Ethology:Nothing known.  Prey:None known.