Creighton, 1927Creighton, W. S. 1927. The slave-raids of Harpagoxenus americanus. Psyche (Cambridge) 34:11-29. [1927-02] PDF: 27 (q.m.); Wheeler & Wheeler, 1955bWheeler, G. C.; Wheeler, J. 1955b. The ant larvae of the myrmicine tribe Leptothoracini. Annals of the Entomological Society of America 48:17-29. [1955-05-18] PDF: 26 (l.). Combination in Protomognathus (Protomognathus): Wheeler, 1905aWheeler, W. M. 1905a. An interpretation of the slave-making instincts in ants. Bulletin of the American Museum of Natural History 21:1-16. [1905-02-14] PDF: 3; in Harpagoxenus: Wheeler, 1910aWheeler, W. M. 1910a. Ants: their structure, development and behavior. New York: Columbia University Press, xxv + 663 pp. [1910-03] PDF: 494; in Protomognathus: Cover, in Hölldobler & Wilson, 1990Hölldobler, B.; Wilson, E. O. 1990. The ants. Cambridge, Mass.: Harvard University Press, xii + 732 pp.: 65. See also: Smith, 1939bSmith, M. R. 1939b. The North American ants of the genus Harpagoxenus Forel, with the description of a new species (Hymenoptera: Formicidae). Proceedings of the Entomological Society of Washington 41:165-172. [1939-05-27] PDF: 166.