Stilpnogaster auriannulatus (Hine)

Stilpnogaster auriannulatus Hine, 1906: 29 .

Recognition characters: Black and yellow species; length 14–17 mm; mystax black; scutellar bristles several, black; wings with brown aspect; abdomen shining black, segments 2–4 with golden yellow annulus apically; legs, femora black except for pre-apical bands of yellow, tibiae yellow with apical black band, tarsal segments yellow with black bases.

Distribution: TETON: Grand Tetons, Jenny Lake, 25 June 1938 (ECVD) (specimen in CAS); Grand Teton National Park, July 1947 (RMB) (specimen in CAS); Jackson Hole, Grand Tetons, 28 June 1938 (ECVD) (two specimens in CAS); Jackson Lake, Grand Teton National Park, 8 Aug. 1960 (RJL); Teton Pass, 16 July 1937 (WNB, J. Wilcox record). YELLOWSTONE NATIONAL PARK: Roosevelt Lodge (322 m S of Tower Jct.), 1 July 1938 (ECVD) (male specimen in CAS). Recorded from Wyoming by: Adisoemarto (1967) (as Asilus auriannulatus); Geller-Grimm (2018).

Habitat: 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.