C. F.  Fallen, ?Syrphici Sveciae?, in Diptera Sveciae / descripta a Carlo Frederico Fallén, vol. Syrphici Sveciae, Berlingianis, Lundae [= Lund]: , 1816, pp. 1-14 [1816.06.08], 15-22 [1816.06.08], 23-30 [1817.05.10], 31-42 [1817.05.20], 43-54 [1817.05.21], 55-62. [1817.05.22].

F. C.  Thompson, ?Keys to Nearctic Syrphidae (Diptera)?, p. 88, 1991.