The Holopogon Complex of North America, Excluding Mexico, with the Descriptions of a New Genus and a New Subgenus (Diptera, Asilidae)
Martin CH. 1959. The Holopogon Complex of North America, Excluding Mexico, with the Descriptions of a New Genus and a New Subgenus (Diptera, Asilidae). American Museum Novitates. 1980:1-40
taxonomic study including material from Sequoia, Yosemite, Great Smoky Mountains, and Big Bend National Parks