Solenopsis pylades richteri Forel, 1909:267,  Trager, 1991Trager, J.C. 1991. A revision of the fire ants, Solenopsis geminata group (Hymenoptera: Formicidae: Myrmicinae). Journal of the New York Entomological Society 99 (2):141-198.:187, Syntype xw, ♀, ♂, examined (MHNG). - As Solenopsis richteri:  - Trager, 1991Trager, J.C. 1991. A revision of the fire ants, Solenopsis geminata group (Hymenoptera: Formicidae: Myrmicinae). Journal of the New York Entomological Society 99 (2):141-198. (distribution); AntWeb, 2023AntWeb 2023. Ants. . (distribution). - As Solenopsis saevissima richteri:  - Smith, 1958Smith, M.R. 1958. Family Formicidae.  In: Krombein, K.V. (Ed.). Hymenoptera of America North of Mexico - Synoptic Catalog. Washington: U.S. Department of Agriculture. Agriculture Monograph No. 2. First Supplement, 305 pp. 108-162. (distribution).
Solenopsis pylades tricuspis Forel, 1912:397,  Trager, 1991Trager, J.C. 1991. A revision of the fire ants, Solenopsis geminata group (Hymenoptera: Formicidae: Myrmicinae). Journal of the New York Entomological Society 99 (2):141-198.:187, Syntype xw, examined (MHNG). - Trager, 1991Trager, J.C. 1991. A revision of the fire ants, Solenopsis geminata group (Hymenoptera: Formicidae: Myrmicinae). Journal of the New York Entomological Society 99 (2):141-198.:187 ( listed as synonym of Solenopsis richteri Forel, 1909).
Solenopsis saevissima oblongiceps Santschi, 1936:405,  Trager, 1991Trager, J.C. 1991. A revision of the fire ants, Solenopsis geminata group (Hymenoptera: Formicidae: Myrmicinae). Journal of the New York Entomological Society 99 (2):141-198.:187, Syntype xw, examined (NMB). Synonymized with Solenopsis richteri Forel, 1909 by Trager, 1991Trager, J.C. 1991. A revision of the fire ants, Solenopsis geminata group (Hymenoptera: Formicidae: Myrmicinae). Journal of the New York Entomological Society 99 (2):141-198.:187.