Promachus Loew, 1848

Lavigne, Robert J. & Dennis, Steve, 2019, Robber flies (Insecta: Diptera: Asilidae) of Wyoming, USA with keys to genera and species, Zootaxa 4662 (1), pp. 1-126 : 58-59

Promachus Loew

Promachus Loew, 1848: 390 .

Species found in Wyoming: Promachus albifacies , P. dimidiatus , P. fitchii , and P. magnus .

Key to Species (adapted from Hine 1911b; Curran 1927)

1 Grayish to grayish black pollinose species; mystax white or with a slight shade of yellow; femora mainly black or dark reddish................................................................................................ 2

- Brownish or yellowish pollinose species; mystax distinctly yellow; femora yellowish red to dark rusty reddish........... 3

2 Grayish pollinose species; mystax white with a slight shade of yellow; wings nearly hyaline; femora chiefly black............................................................................................ Promachus albifacies

- Dark grayish black species; mystax white; wings reddish hyaline, slightly darker at the apex; femora dark reddish............................................................................................. Promachus magnus

3 Grayish black species; femora rusty reddish; scutellar setae long, sparse white; wings tinged yellowish brown; femora dark rusty reddish; male genitalia not as long as abdominal segments 5–7............................ Promachus dimidiatus

- Golden brown to brownish species; scutellar setae yellow and numerous; wings tinged reddish brown to brownish; femora yellowish red; male genitalia as long as abdominal segments 5–7..................................... Promachus fitchii