Promachus magnus Bellardi
Promachus magnus Bellardi, 1861: 26 .
Recognition characters: Dark grayish black species; length 27–35 mm; mystax white; thorax dark reddish with narrow gray dorsal stripes; scutellum with sparse white setae, black bristles rare; wings reddish hyaline, slightly darker at the apex; abdominal segments black above with gray posterior borders; male genitalia densely silvery pilose above; legs very dark reddish.
Distribution: Recorded in Wyoming by Dennis & Lavigne (2007) (Platte and Sweetwater Counties).
Habitat: Sagebrush steppe shrub and grassland, and grama-needlegrass-wheatgrass grassland vegetation types.
Ethology: Nothing known.
Prey: None known.