| Tanyoprymnus longitarsis Cameron, 1905 |
| Tanyoprymnus moneduloides (Packard, 1867) |
| Thao Tsuneki, 1982 |
| Thyreocerus Costa, 1871 |
| Thyreocnemus Costa, 1871 |
| Thyreopodina Ashmead, 1899 |
| Thyreopus Lepeletier & Brullé, 1835 |
| Thyreopus coloradensis Packard, 1867 |
| Thyreopus melanius Rohwer, 1911 |
| Thyreopus venator Rohwer, 1911 |
| Thyreopus xanthognathus Rohwer, 1911 |
| Toncahua Pate, 1944 |
| Towada Tsuneki, 1970 |
| Trachypus Klug, 1810 |
| Trachypus annulitarsis Cameron, 1908 |
| Trachypus gracilis (Cameron, 1890) |
| Trachypus hirticeps (Cameron, 1890) |
| Trachypus mexicanus de Saussure, 1867 |
| Tripoxilon Spinola, 1806 |
| Trypargilum Richards, 1934 |