| Odontomyia inaequalis var. continua James, 1974 |
| Oplachantha Rondani, 1863 |
| Oplachantha mexicana (Bellardi, 1859) |
| Oxycerini Enderlein, 1914 |
| Pachygaster Meigen, 1803 |
| Pachygaster antiquus James, 1971 |
| Pachygaster microdonta Kertész, 1908 |
| Pachygaster montana Kraft & Cook, 1961 |
| Pachygastrinae Loew, 1856 |
| Panacridops James & Woodley, 1980 |
| Panacridops varians James & Woodley, 1980 |
| Panacris Gerstaecker, 1857 |
| Panacris microdonta Kertész, 1908 |
| Paraberismyia Woodley, 1995 |
| Paraberismyia tzontehuitza Woodley, 1995 |
| Pareidalimus Lindner, 1964 |
| Pedicella Bigot, 1856 |
| Prosopochrysini Enderlein, 1914 |
| Psegmomma Enderlein, 1914 |
| Psellidotus Rondani, 1863 |