| Trachymyrmex seminole Creighton, 1950 |
| Trachymyrmex septentrionalis (McCook, 1881) |
| Trachymyrmex septentrionalis subsp. seminole Creighton, 1950 |
| Trachymyrmex smithi Buren, 1944 |
| Trachymyrmex smithi subsp. neomexicanus Cole, 1952 |
| Trachymyrmex squamulifer (Emery, 1896) |
| Trachymyrmex turrifex (Wheeler, 1903) |
| Trachymyrmex turrifex subsp. caroli (Wheeler, 1911) |
| Trachymyrmex uncifer Santschi, 1931 |
| Trachymyrmex vertebrata (Wheeler, 1911) |
| Trachymyrmex virginiana (Buckley, 1866) |
| Tranopelta Mayr, 1866 |
| Tranopelta amblyops (Emery, 1894) |
| Tranopelta columbica Forel, 1912 |
| Tranopelta gilva Mayr, 1866 |
| Tranopelta gilva var. brunnea Forel, 1909 |
| Tranopelta heyeri (Forel, 1901) |
| Tranopeltoides Wheeler, 1922 |
| Trichomyrmex Mayr, 1865 |
| Trichomyrmex atomaria (Gerstäcker, 1859) |