Negasilus Curran

Negasilus Curran, 1934: 183 .

Species found in Wyoming: Negasilus aridalis, N. belli, N. cumbipilosus, and N. gramalis .

Key to Species [adapted from Adisoemarto (1967) (as Asilus); Martin (1975)]

1 Lateroposterior corners of abdominal tergites with one or more bristles longer than other setae and bristles.............. 2

- Lateroposterior margins of abdominal tergites without long bristles.............................................. 3

2 Posterior margin of scutellum usually without bristles, if present, short recumbent and pointing laterally; femora black with reddish band at apex........................................................................ Negasilus belli

- Posterior margin of scutellum with long bristles; hind femora totally black...................... Negasilus cumbipilosus

3 Leg coxae grayish pollinose; femora reddish yellow; tibiae orange yellow.......................... Negasilus aridalis

- Leg coxae golden yellow; femora totally black; tibiae reddish brown.............................. Negasilus gramalis