| Trigonospila stipatus (Reinhard, 1958) |
| Triodontopyga Townsend, 1927 |
| Triodontopyga flavolimbata (Bigot, 1889) |
| Triodontopyga vorax (Wiedemann, 1830) |
| Trixodes Coquillett, 1902 |
| Trixodes obesus Coquillett, 1902 |
| Trixodini Townsend, 1908 |
| Trochilodexia Townsend, 1915 |
| Tropidodexia Townsend, 1915 |
| Tropidodexia coracina (Wulp, 1891) |
| Tropidopsis Brauer & Bergenstamm, 1889 |
| Trypheromyia Reinhard, 1945 |
| Tsugaea Hall, D. G., 1939 |
| Tsugaea nox Hall, 1939 |
| Tyreomma Brauer & Bergenstamm, 1891 |
| Tyreomma muscinum Wulp, 1896 |
| Tyreomma trixoides (Townsend, 1917) |
| Uramya Robineau-Desvoidy, 1830 |
| Uramya acuminata (Bigot, 1885) |
| Uramya aldrichi Reinhard, 1935 |