Emery, 1911e: 13 (world).
Emery, 1911e: 12; Brown, 1975: 39; Bolton, 2003: 33.
Emery, 1901b: 36; Wheeler, 1902e: 184; Ashmead, 1905c: 382; Ashmead, 1906: 28; Wheeler, 1910a: 137; Forel, 1917: 239; Kempf, 1972b: 262; Wheeler & Wheeler, 1985b: 256; Dlussky & Fedoseeva, 1988: 79; Hölldobler & Wilson, 1990: 10; Bolton, 1990a: 67; Bolton, 1990c: 1357; Bolton, 2003: 137; Ward, 2007c: 555.