Willistonininae, Artigas & Papavero, 1991

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 : 117

Subfamily Willistonininae

Genera found in Wyoming: Ablautus and Willistonina .

Key to Genera [adapted from Wood (1981)]

1 Frons greatly expanded toward vertex; vertex, measured from above between eyes, at least 1.7 times as wide as face at level of antennae; face plane or slightly convex; mystax confined to lower margin consisting of 6–12 pairs of straight to moderately stout bristles; body and legs without scale-like setae.............................. Willistonina bilineata nigrofemorata

- Sides of frons usually more or less parallel or converging toward vertex, but if expanded, only slightly so; mystax occupying lower half or more of face; thorax, legs, pronotum with appressed white scale-like setae....................... Ablautus