Emery, 1894d PDF: 183 (species key);
Emery, 1910b PDF: 23 (diagnosis, catalogue);
Gallardo, 1920 PDF: 348 (Argentina species key);
Smith, 1942c PDF: 542 (U.S.A. species key);
Buren, 1944a PDF: 280 (U.S.A., Iowa species key);
Creighton, 1950a PDF: 66 (North America species key);
Borgmeier, 1955 PDF: 277, 290 (diagnosis, all species revision, key); Watkins, 1971: 93 (U.S.A. species key);
Kempf, 1972b PDF: 152 (Neotropical catalogue); Watkins, 1972: 348 (U.S.A. species key); Watkins, 1976: 11 (all species key);
Smith, 1979: 1329 (North America catalogue); Watkins, 1982: 210 (Mexico species key); Watkins, 1985: 481 (U.S.A. species key);
Wheeler & Wheeler, 1986g PDF: 19 (U.S.A., Nevada species key);
Brandão, 1991 PDF: 359 (Neotropical catalogue);
Bolton, 1995a PDF: 1051 (census);
Bolton, 1995b: 287 (catalogue);
Ward, 1999A: 90 (modification of Watkins, 1985 key);
Palacio, 1999: 154 (Colombia species key);
Mackay & MacKay, 2002 PDF: 40 (U.S.A., New Mexico species key); Coovert, 2005: 30 (U.S.A., Ohio species key); Snelling, G.C &
Snelling, 2007: 462 (U.S.A. species, keys).