| Macrocentrinae Wharton, 1998 |
| Macrocentrini |
| Macrocentrus Curtis, 1833 |
| Macrocentrus ancylivorus Rohwer, 1923 |
| Macrocentrus prolificus Wharton, 1984 |
| Macrocentrus texanus Muesebeck, 1932 |
| Macrodyctium Ashmead, 1900 |
| Macropalpus Ratzeburg, 1844 |
| Masonbeckia Sharkey & Wharton, 1994 |
| Masonbeckia brunneigaster Sharkey & Wharton, 1994 |
| Masonbeckia pauxipalpa Wharton, 1994 |
| Megachelonus Beker, 1926 |
| Megagathis Kriechbaumer, 1894 |
| Megagathis petiolata (Szépligeti, 1904) |
| Melanobracon Ashmead, 1900 |
| Mendesellinae Whitfield, 1998 |
| Mesostoma Cameron, 1905 |
| Mesothesis Förster, 1862 |
| Metapleurodon Enderlein, 1920 |
| Meteorinae Shaw, 1998 |