Syrphus sonorensis Vockeroth 1983

Vockeroth 1983. Nomenclatural notes on Nearctic Syrphinae, with descriptions of new species Syrphus and keys to Nearctic species of Didea, Epistrophe s. str., and Syrphus (Diptera: Syrphidae). Canadian Entomologist, 115(2) 1983: 175-182