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 Pogonioefferia staminea (Williston) Erax stamineus Williston, 1885: 68 . Recognition characters: Brownish gray and silver species; length 11–24 mm ; mystax yellow to yellowish white; bristles and setae of mesonotum mostly black except supraalar setae white; postpronotal setae of male black, of female, partly white; meral bristles straw white; scutellar setae and bristles black males, white on females; in males abdominal tergites 3–7 and occasionally 2 apically silvery white pollinose, long white setae parted in middle and directed outward on tergites 3–6; lower arm of basistyle in males 3 times the length of upper arm and curved downward; legs with pale yellow setae femora black, tibiae variable (black to reddish). See P . rapax . Distribution: ALBANY: Laramie, 17 Aug. 1964 ( RJL ); E flank of Laramie Peak, Laramie Mtns., 17 July 1964 ( RJL , FRH ). CONVERSE: Douglas, 11 July 1961 ( RJL ). FREMONT: Lander, WANG, LTA, 29 June 2004 ( CSU , GMAD ), 2 July 2005 ( CSU , GMAD ), 8 Aug. 2004 ( CSU , GMAD ). PLATTE: Camp Guernsey , WANG, 2001b ( CSU , GMAD ); Chugwater, 23 July 1952 ( REP ). Dwyer, numerous records, 22 June–3Aug. ( RJL ); Gray Rocks Ranch, Camp Guernsey , 14–22 July 2008 ( CSU , GMAD ); Guernsey , numerous records, 22 June–22 Aug. ( RJL ); Guernsey State Park, 16 July 1964 ( RJL ); Register Cliff, 1,981 km ( 6,500 ft ), E of Guernsey , 15 July 1964 ( FRH ); Hartville, 19 June–17 July 1963 , 9 June–9 July 1964 ( RJL ). GOSHEN: Smith Ranch, Lingle, 20 June–2 July 1963 ( RJL ), 20 June–15 July 1964 ( RPB , RJL , FRH ). HOT SPRINGS: Owl Creek Mtns., 1,615 m ( 5,300 ft ), 25 June 1961 ( RJL ). LARAMIE: Pine Bluffs, 19 July 1963 ( LJS ). PLATTE: Wheatland, 22 July 1965 ( RJL ); Wheatland Cutoff, 8 July 1962 ( RJL ); Cherry Creek, SE of Wheatland, 7–13 July 1966 ( RJL ); Pin Top Trail, 11 July 1981 ( REP ). Recorded from Wyoming by: Brown (1929) (as Erax stamineus ); Cole (1969) (as Efferia staminea ); Dennis & Lavigne (1975) (as Efferia staminea ; as prey of Ospriocerus latipennis , Stenopogon inquinatus ); Dennis et al. (2010) (as Efferia staminea ); Fisher & Wilcox (1997) (as Efferia staminea ); Geller-Grimm (2018) ; Hine 1919 ) (as Erax stamineus ); Lavigne (1964) (as Efferia staminea ; prey of Pogonioefferia helenae (as Efferia bicaudata ); Lavigne & Holland [(1969) (as Efferia staminea ; as prey of Pogonioefferia pallidula (as Efferia pallidula )]; Martin & Wilcox (1965) (as Efferia staminea ); Wilcox (1966b) (as Efferia staminea ). Habitat: Pine-douglas fir forest (clearings within the forest where shrubs and grasses are dominant), sagebrush steppe and wheatgrass-needlegrass shrub steppe shrub and grassland, and grama-needlegrass-wheatgrass and grama-buffalo grass grassland vegetation types . Open rangeland, blue grama ( Bouteloua gracilis ) and threadleaf sedge ( Carex filifolia ) communities. Ethology: Rests on and forages from soil, grass mat, and other vegetation (see Lavigne & Holland 1969 as Efferia staminea ). Prey: HYMENOPTERA , wild bee predator, Glendo Study A, 10 July 1968 ( REP ). COLEOPTERA , DIPTERA , HEMIPTERA (Heteroptera, Homoptera) , HYMENOPTERA , LEPIDOPTERA , NEUROPTERA, ODONATA, OR- THOPTERA (see Dennis et al. 2010 ; Lavigne & Holland 1969 ; Lavigne & Pfadt 1966 ; Lavigne et al. 1968 ; Rogers & Lavigne 1972 , all as Efferia staminea ).