Heteropogon maculinervis James, 1937

Lavigne, Robert J. & Dennis, Steve, 2019, Robber flies (Insecta: Diptera: Asilidae) of Wyoming, USA with keys to genera and species, Zootaxa 4662 (1), pp. 1-126 : 76

Heteropogon maculinervis James

Heteropogon maculinervis James, 1937: 12 .

Recognition characters: Brownish species; length 10–14 mm; mystax black with some white setae above; thorax brown pollinose dorsally, gray pollinose laterally; scutellar bristles lacking setae white, veins of wings dark brown with brown spots at junctions of several veins; abdomen black with apical 2–3 segments reddish brown, lateral setae on abdominal segments 1–4 white, hind corners of segments yellow-gray pollinose; legs, femora black, tibiae and tarsi reddish brown, patch of black setae on middle tibiae of males.

Distribution: FREMONT: Lander, WANG, LTA, 8 August 2004 ( CSU, GMAD). PLATTE: Twin Pine Ranch, 13 km W of Dwyer, 12 Sept. 1965 ( FRH), 14 Sept. 1965 ( RJL), 25 Aug, 1966 ( RJL); Laramie Peak, 3 Sept. 1964 ( RJL, FRH); 14 km W of Dwyer Jct., Laramie Peak - Laramie Mtns., 2 Aug.–14 Sept. ( FRH, RJL). SHERIDAN: 9.8 km E of Sheridan, 5 Aug. 1980 ( RJL). Recorded from Wyoming by: Dennis & Lavigne (2007); Geller-Grimm (2018); Lavigne (1970b).

Habitat: Pine-douglas fir forest (clearings within the forest where shrubs and grasses are dominant) vegetation type. Local population occurred in canyon along dry intermittent streambed (see Lavigne 1970b).

Ethology: Flies rested and foraged from tips of branches of willow and box elder at a height of 1.2–6.1 m; courtship (see Lavigne 1970b).

Prey: HYMENOPTERA , Formicidae : unidentified (winged reproductive). HEMIPTERA (as Homoptera), HYMENOPTERA (see Dennis & Lavigne 2007; Lavigne 1970b).