1. Howard, L. O. & Fiske, W. F., 1911: Bull. U.S. Bur. Ent.
91.
2. Shelford, V., 1927: Bull. Illinois Nat. Hist. Surv.
16, 307.
3. Bodenheimer, F. S., 1928: Biol. Zbl.
48, 774;
4. Bodenheimer, F. S., 1930: Z. angew. Ent.
15, 1;
5. Bodenheimer, F. S., 1930: ibidem, 16, 433;