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 Albibarbefferia albibarbis (Macquart) Erax albibarbis Macquart, 1838: 117 . Recognition characters: Grayish to brownish species; length 16–19 mm ; mystax white; mesonotum brown; scutellar setae white, 8 white, marginal bristles; wings hyaline, veins brown; male abdominal segments 1–5 and 8 gray, 6–7 white, 2 with small brown basal spots, 3–5 black basally usually bisected; female sides and posterior margins of abdominal segments grayish white pollinose, 3–7 black dorsally, venter white pollinose; male genitalia black, female ovipositor black brownish or reddish; femora black, tibiae and tarsi yellowish red, tips darker. Distribution: Recorded from Wyoming ( Table 1 ) by: Cannings (2013) (entire United States ); Fisher & Wilcox (1997) (entire United States ; as Efferia albibarbis ); Geller-Grimm (2018) ; Scarbrough et al. (2012) (coast to coast in United States , southern Canada south to Venezuela ; as Efferia albibarbis ). Habitat: Sagebrush steppe shrub and grassland vegetation type . Ethology: Nothing known. Prey: None known.