A checklist of the Robber Flies (Insecta: Diptera: Asilidae) of Wyoming, USA Lavigne, Robert J. Dennis, D. Steve Zootaxa 2017 4238 3 335 365 [151,418,1663,1688] Insecta Asilidae Machimus Animalia Diptera 6 341 Arthropoda species occidentalis   Published State Records: Geller-Grimm (2016)( Wyoming); Lavigne & Pfadt (1965, 1966) (as  Asilus occidentalis; grasshopper predator). Published County Records: AL [ Dennis & Lavigne (1979)(ethology; as  Machimus occidentalis); Dennis et al. (2008)(pupal case; as Machimus  callidus)]; PL. Museum Records: AL (pupal case deposited in United States National Museum of Natural History); FR; HS; NI; PL; TE. 1438340120 Wyoming 6 341 1 Wyoming