Machimus adustus (Martin)

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 : 45

Machimus adustus (Martin)

Asilus avidus Wulp, 1869: 82 .

Recognition characters: Brownish gray species; length 14–16 mm; mystax black above, white below; thorax brown and gray pollinose; scutellar setae white, bristles 4 black; wings hyaline with dark tinge at apex; abdomen gray pollinose with brown pollinose areas dorsally; lateral setae on first abdominal segment white; legs reddish brown with femora black anteriorly.

Distribution: ALBANY: Pole Mtn., July 1960 ( RJL). FREMONT: near Lander, 1,524 –2,438 m (5,000 –8,000 ft), Aug. 1895 ( RM-UK); paratype, one male, Pole Mtn., 10 July 1960 ( RJL). LINCOLN: Fossil, 1 Aug. 1964 ( CD, BD) (specimen in CAS). SUBLETTE: paratype series - three males, two females, S of Pinedale, on sagebrush, 24–29 July 1964 ( RJL); TETON: paratype, one male, West Entrance, Targhee National For., 8 Aug. 1967 ( RJL) ( Martin 1975). Recorded from Wyoming by: Fisher & Wilcox (1997); Geller-Grimm (2018); Martin (1975).

Habitat: Pine-douglas fir forest (clearings within the forest where shrubs and grasses are dominant), and sagebrush steppe shrub and grassland vegetation types.

Ethology: Nothing known.

Prey: None known.