Nematode-induced demasculinization of Nearctic Dolichopodidae (Diptera) with five new synonyms Author Runyon, Justin B. text Zootaxa 2022 2022-01-24 5092 5 545 558 journal article 2447 10.11646/zootaxa.5092.5.3 851d995a-7acd-410b-9ab8-c38a81a2fc4f 1175-5326 5896385 5E84BAA2-9CD2-4471-93A2-56A468E69DF3 Dolichopus beatus Van Duzee, 1921: 63 Potential infected species: Dolichopus bisetosus Van Duzee, 1921: 77 . Dolichopus beatus was described from one male collected at Craig Mountain, Idaho , USA . The male is described as having a wide face and a very small hypopygium that is “about the size of the fifth abdominal segment”. Eight males of the putative host species, D. bisetosus , were also collected at Craig Mountain, Idaho . Both species belong to Group B of the North American species of Dolichopus (Van Duzee 1921) and differ in width of the face, size of the postabdomen, and extent of yellow on the middle femur (in D. beatus the femur is darker and more like the female which has black femora).