| Trichesia Provancher, 1881 |
| Trichesia auripes Provancher, 1881 |
| Triderodon Enderlein, 1920 |
| Trinaria Provancher, 1886 |
| Trioxini |
| Trioxys Haliday, 1833 |
| Trioxys (Trioxys) Haliday, 1833 |
| Trioxys (Trioxys) complanatus Quilis, 1935 |
| Trioxys piceus Marshall, 1897 |
| Trioxys testaceipes Cresson, 1880 |
| Trioxys utilis Muesebeck, 1956 |
| Triraphis Ruthe, 1855 |
| Trissarthrum Ashmead, 1900 |
| Tropidobracon Ashmead, 1900 |
| Udamolcus Enderlein, 1920 |
| Urogaster Ashmead, 1898 |
| Urosigalphus Ashmead, 1889 |
| Urosigalphus (Bruchiurosigalphus) Gibson, 1972 |
| Urosigalphus (Bruchiurosigalphus) bruchi Crawford, 1907 |
| Urosigalphus (Bruchiurosigalphus) durangoensis Gibson, 1972 |