Description: English: Charles Howard Curran , 1934 The families and genera of North American Diptera C.H. Curran in [New York]. Sphaeroceridae (as Borboridae) Illustration from S.W. Williston Manual of North American Diptera (1888, 1896, 1908. Date: 31 December 2013, 21:36:54. Source:
https://www.biodiversitylibrary.org/item/29874#page/320/mode/thumb. Author: Williston.