Leptogaster aridus Cole

Leptogaster aridus Cole, 1919: 229 .

Recognition characters: Grayish brown species; 9 mm; mystax white; thorax gray pollinose; scutellum black, gray pollinose lacking bristles; wings hyaline; abdomen dark brown, posterior margins of segments 2–5 yellow; legs yellow, swollen part of hind femora, distal half of hind tibiae and last four joints of tarsi brown.

Distribution: CAMPBELL: Wyodak Plant/Station 1, 3, 8, A-2, 12B, Gillette, 10 June 1977 (DM); Wyodak Plant/Station 1, Gillette, 22 June 1977 (DM); Wyodak Plant/Station 13–15, Gillette, 24 May 1977 (DM): JOHN- SON: 2.1 km N of I-90, Powder River Rd. Exit 8 June 1980 (RJL); SHERIDAN: Sheridan, WANG, LTA, 14–15 June 2007 (CSU, GMAD); 24–25 June 2010 (BCK, BH) (CSU, GMAD); 8–9 July 2010 (BCK, DAL) (CSU, GMAD).

Habitat: Wheatgrass-needlegrass shrub steppe shrub and grassland, and grama-needlegrass-wheatgrass grassland vegetation types.

Ethology: Nothing known.

Prey: None known.