| Trachysphyrus planosae subsp. mesorufus Cushman, 1930 |
| Trachysphyrus rugosiscutum Pratt, 1945 |
| Trachysphyrus rugosiscutum subsp. binarius Townes, 1962 |
| Trachysphyrus rugosiscutum subsp. flagellatus Townes & Townes, 1962 |
| Trachysphyrus sodalis Pratt, 1945 |
| Trachysphyrus sodalis subsp. flagellatus Pratt, 1945 |
| Trapezonalis Szépligeti, 1916 |
| Trathala Cameron, 1899 |
| Trathala laticlypeata Dasch, 1979 |
| Trathala meridionalis Dasch, 1979 |
| Trestis Förster, 1868 |
| Trevoria Ashmead, 1900 |
| Trichionotus Cameron, 1905 |
| Trichionotus fumipennis (Cresson, 1874) |
| Tricholabus Thomson, 1894 |
| Tricholabus chalco (Cresson, 1868) |
| Tricholabus excuratus (Cresson, 1874) |
| Tricholabus limitaris (Cresson, 1868) |
| Tricholabus toluca (Cresson, 1868) |
| Trichomella Szépligeti, 1910 |