Description: English: Williston, Samuel Wendell Manual of North American Diptera New Haven :J. T. Hathaway,1908.Third Edition Wing Venation figures15-20 Rhyphidae synonym for Anisopodidae Cyrtidae synonym for Acroceridae Bombyliidae Conopidae Scenopinidae Empididae. Date: 10 December 2013, 15:33:05. Source: https://www.biodiversitylibrary.org/item/97373#page/86/mode/1up. Author: Williston. Other versions: WillistonWingVenation15-20.jpg.
Description: English: Williston, Samuel Wendell Manual of North American Diptera New Haven :J. T. Hathaway,1908.Third Edition Wing Venation figures15-20 Rhyphidae synonym for Anisopodidae Cyrtidae synonym for Acroceridae Bombyliidae Conopidae Scenopinidae Empididae. Date: 10 December 2013, 15:33:05. Source: https://www.biodiversitylibrary.org/item/97373#page/86/mode/1up. Author: Williston. Other versions: WillistonWingVenation15-20-clean.jpg.
Description: Scenopinus illustration from Insecta Britannica Diptera. Date: between 1851 and 1856. Source: Insecta Britannica Diptera. Author: Francis Walker.