J.  Herzig, ?Blattlausmelkende Fliegen?, Zoologischer Anzeiger, vol. 121, pp. 18-20, 1938.

C. S.  Brimley, The insects of North Carolina. Being a list of the insects of North Carolina and their close relatives. Raleigh, N.C.: North Carolina Department of Agriculture, Division of Entomology, 1938, p. 560 pp.