• Unnecessary (second) replacement name for Syllophopsis modesta boerorum Santschi, 1915c
• Junior synonym of Syllophopsis modesta: Bolton, 1987: 423; Bolton, 1995b: 267; Heterick, 2006: 177.

Obsolete combinations

• Monomorium modestum smutsi

Citations

• Bolton, B. 1987. A review of the Solenopsis genus-group and revision of Afrotropical Monomorium Mayr (Hymenoptera: Formicidae). Bulletin of the British Museum (Natural History). Entomology 54:263-452. PDF
• Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp.
• Heterick, B. 2006. A revision of the Malagasy ants belonging to genus Monomorium Mayr, 1855 (Hymenoptera: Formicidae). Proceedings of the California Academy of Sciences (4)57:69-202. PDF
• Wheeler, W. M. 1922. Ants of the American Museum Congo expedition. New York: Bulletin of the American Museum of Natural History, 1139.