Lasiopogon Loew

Lasiopogon Loew, 1847: 508 .

Species found in Wyoming: Lasiopogon aldrichii, L. bivittatus, L. cinereus, L. lavignei, L. monticola, L. polensis, and L. quadrivittatus .

Key to Species [adapted from Cannings (2002); Cole & Wilcox (1938); Melander (1923c)]

1 Knob of haltere brown or yellowish white with distinct black center on dorsum.................................... 2

- Knob of haltere white to yellow.......................................................................... 3

2 Knob of haltere brown; metanotal [meral, metanepisternum]; bristles black; some bristles on at least basolateral corners of at least abdominal tergite 1 black/brown; scutellar bristles black.................................. Lasiopogon cinereus

- Knob of haltere yellowish white with distinct black center on dorsum; metanotal bristles brown; bristles on basolateral corners of abdominal tergite 1 white or pale yellow; scutellar bristles black with 1 white.................... Lasiopogon polensis

3 Mystax pure white; scutellar bristles light colored to white; metanotal bristles white............ Lasiopogon quadrivittatus

- Mystax black or brown, sometimes with few white setae below; scutellar bristles black; metanotal bristles black.......... 4

4 Male genitalia ferruginous or yellow-red; scutum gray, brown tomentum more-or-less restricted to the dorsocentral and medial stripes.............................................................................. Lasiopogon aldrichii

- Male genitalia shining dark brown/black or dark chestnut (rust colored) with gray tomentum; scutum evenly to gray-gold laterally with faint to patchy dorsocentral stripe................................................................. 5

5 Male genitalia dark chestnut with gray tomentum; short appressed setae on dorsum of hind femora white. Lasiopogon lavignei

- Male genitalia shining dark brown/black to black; maybe few white setae basally on hind femora but mostly brown/black to blackish white........................................................................................ 6

6 Dorsomedial stripes of thorax not widely separated; male genitalia shining dark brown/black; short appressed setae on dorsum of hind femora brown/black, often some white ones at base................................... Lasiopogon monticola

- Dorsomedial stripes of thorax widely separated; male genitalia shining black; bristles and pile of hind femora black to blackish white............................................................................... Lasiopogon bivittatus