Myrmecocystus mexicanus valid Mexico. Neotropic.
Wesmael, C. 1838. Sur une nouvelle espèce de fourmi du Mexique. Bulletin de l'Académie Royale des Sciences et Belles-Lettres de Bruxelles 5:766-771.   129790

Myrmecocystus mexicanus idahoensis obsolete combination U.S.A. (Idaho). Nearctic.
Cole, A. C., Jr. 1936b. Descriptions of seven new western ants. (Hymenop.: Formicidae). Entomological News 47:118-121.   123686

Myrmecocystus mexicanus melanoticus obsolete combination Mexico (Hidalgo). Nearctic.
Wheeler, W. M. 1914c. Ants collected by W. M. Mann in the state of Hidalgo, Mexico. Journal of the New York Entomological Society 22:37-61.   130084

Myrmecocystus mexicanus mojave obsolete combination U.S.A. (California). Nearctic.
Wheeler, W. M. 1908g. Honey ants, with a revision of the American Myrmecocysti. Bulletin of the American Museum of Natural History 24:345-397.   130030

Myrmecocystus mexicanus navajo obsolete combination U.S.A. (New Mexico). Nearctic.
Wheeler, W. M. 1908g. Honey ants, with a revision of the American Myrmecocysti. Bulletin of the American Museum of Natural History 24:345-397.   130030