Asilidae, or robber flies, also called assassin flies. Robber flies usually have stout legs, and a mustax, which is a "mustache" of stiff hairs on their face. Robber flies are also exceptional predators, and attack and intercept a wide range of insect prey.
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USA: UTAH: Utah Co., Wheeler Saw Mill, 12 mi E of Thistle, Hwy 6/50, 15 July 2000, C.R. Nelson #7104. Asilidae: Machmus sp. female with Myrmeleontidae
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