Coleomyia sp.

Coleomyia is a genus of robber fly in the family Asilidae. The adult preys on insects and often catches them in flight. The larva can have a varying diet depending on its current larval stage. It can take 1-3 years for members of the Asilidae family to complete their life cycles. These flies are often found in open, sunny, and dry habitats with patches of vegetation. 

Order: Diptera
Family: Asilidae
Species: probably Coleomyia sp.

Photograph: © 2016 RKD Peterson
Date of Photograph: 7 August 2016
Location: Montana, Gallatin Co. (45^o22'26" N 111^o08'54" W)