Pupal cases of Nearctic robber flies (Diptera: Asilidae) Author Dennis, D. Steve Author Barnes, Jeffrey K. Author Knutson, Lloyd text Zootaxa 2008 2008-09-03 1868 1 1 98 https://biotaxa.org/Zootaxa/article/view/zootaxa.1868.1.1 journal article 10.11646/zootaxa.1868.1.1 1175­5334 5133591 Megaphorus guildiana (Williston) ( Fig. 50 ) A description of a male pupal case was given by Dennis & Lavigne (1976a) (as Mallophorina guildiana (Williston)) . A specimen deposited in the United States National Museum is labeled "Jack Jones Pl., Wheatland, Wyo.; VII–29–1973 ; S. Dennis Collector. ” The description should include the following: abdominal spiracles reddish brown, elongate­oval, situated along midline laterally .