Reported are 158 species of Asilidae (Diptera) in 50 genera from Utah. Keys to subfamilies, genera, and species are given, along with information on seasonal and distributional occurrence in Utah. Seventy-six maps and 56 line drawings show the Utah distribution of each species and illustrate important characters used in the keys. A table summarizes the current status of names used in earlier state lists.
Nelson, C. Riley
"Robber flies of Utah (Diptera: Asilidae),"
Great Basin Naturalist: Vol. 47
, Article 6.
Available at: http://scholarsarchive.byu.edu/gbn/vol47/iss1/6