Nomenclatural notes on Nearctic Syrphinae, with descriptions of new species of Syrphus and keys to Nearctic species of Didea, Epistrophe s. str., and Syrphus (Diptera: Syrphidae)

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith