Stenopogon Loew

Stenopogon Loew, 1847: 453 .

Species found in Wyoming: Stenopogon engelhardti, S. graminis sp. nov., S. inquinatus, S. martini, S. obscuriventris, and S. rufibarbis .

Key to Species [adapted from Wilcox (1971)]

1 Tibiae reddish ( graminis has black and red fore- and mid-tibiae)................................................ 2

- Tibiae yellowish-to-yellowish red........................................................................ 4

2 Antennae orange; male hypandrium bilobed with deep cleft between lobes................ Stenopogon graminis sp. nov.

- Antennae black; male hypandrium not bilobed.............................................................. 3

3 Leg setae and bristles yellowish white to bristles black; male hypandrium triangular when viewed ventrally................................................................................................. Stenopogon inquinatus

- Leg setae and bristles orange; male hypandrium broad, not triangular when viewed ventrally........ Stenopogon rufibarbis

4 Leg setae and bristles yellowish; male hypandrium bilobed with “U” shape when viewed ventrally. Stenopogon obscuriventris

- Leg setae white, bristles yellowish; male hypandrium not bilobed when viewed ventrally............................ 5

5 Apical half hind tibiae black; pulvilli and halteres light brown; abdomen largely shining black, setae yellowish white........................................................................................ Stenopogon engelhardti

- Apical half hind tibiae brown; pulvilli and halteres whitish (base of haltere stem brown); abdomen black, setae white........................................................................................... Stenopogon martini