Emery, 1924f: 240; Chapman & Capco, 1951: 115 (Asia); Bolton, 1995b: 171.
Emery, 1924f: 240 (diagnosis); Wheeler, 1924c: 248 (all species key); Bolton, 1995a: 1049 (census); Shattuck, 1999: 133 (Australia synopsis); Eguchi et al., 2011: 15 (diagnosis, Vietnam synopsis); Bharti & Kumar, 2013a: 42 (all species key); Zettel & Bruckner, 2013: 137 (diagnosis, Philippines species key); Cantone, 2017: 199 (brief male diagnosis); Chen et al., 2019: 137 (all species key).
Extant: 21 valid species (1 synonym, 1 obsolete combination, 2 unavailable misspellings), 1 valid subspecies (2 synonyms, 2 obsolete combinations)