Emery, 1895l: 768 (diagnosis); Wheeler, 1910a: 139 (diagnosis); Emery, 1914e: 35, 40 (diagnosis (in key), synoptic classification); Forel, 1917: 240 (synoptic classification); Emery, 1921c: 35 (diagnosis, genera key, catalogue); Wheeler, 1922: 660 (genera key); Wheeler & Wheeler, 1976b: 53 (larvae, review and synthesis); Kugler, 1978a: 414 (sting structure); Dlussky & Fedoseeva, 1988: 79 (synoptic classification); Hölldobler & Wilson, 1990: 16 (synoptic classification); Brandão, 1991: 390 (Neotropical fauna, synoptic classification); Bolton, 1994: 106 (synoptic classification); Bolton, 1995a: 1041 (census); Bolton, 1995b: 13 (catalogue); Fernández, 2003e: 319 (Neotropical genera); Bolton, 2003: 61, 220 (diagnosis, synopsis); Jansen & Savolainen, 2010: 482 (phylogeny of tribe); Ward et al., 2015: 67 (reclassification).