Emery, 1912b: 105 (genera key); Emery, 1914e: 37, 41 (diagnosis (in key), synoptic classification); Forel, 1917: 244 (synoptic classification); Wheeler, 1922: 670 (genera key); Emery, 1924f: 229 (diagnosis, genera key, catalogue); Wheeler & Wheeler, 1976b: 55 (larvae, review and synthesis); Dlussky & Fedoseeva, 1988: 79 (synoptic classification); Bolton, 1994: 105 (synoptic classification); Bolton, 1995a: 1041 (census); Bolton, 1995b: 13 (catalogue); Bolton, 2003: 71, 255 (diagnosis, synopsis).