Eocene Green River Robber Fly IF-PCM-16-080Robber Fly aff. Stenocinclis sp. (Scudder) Green River Formation Parachute Creek Member Middle Eocene Uintah County, Utah This specimen is an outstanding example. The thorax, abdomen and head of the robber fly are perfectly preserved. The legs are very well preserved but the wings are missing. The head has very good detail. The Asilidae are the robber fly family, also called assassin flies. They are powerfully built, bristly flies with a short, stout