Key to the genera of nearctic Syrphidae Miranda G.F.G, Young A.D., Locke M.M., Marshall S.A., Skevington J.H., Thompson F.C. 2013. Can. J. Arthropod Identification 23: 1‒351.
Contributed by Martin Hauser on 20 January, 2013 - 3:26pm Additional contributions by v belov, Kevin Moran Last updated 16 April, 2017 - 5:13pm