| Megarhyssa Ashmead, 1900 |
| Megarhyssa histrio (Kriechbaumer, 1890) |
| Megarhyssa lunator Michener, 1939 |
| Megarhyssa lunator subsp. phaeoptila Michener, 1939 |
| Megarhyssa lunatrix (Schulz, 1906) |
| Megarhyssa macrura (Linnaeus, 1771) |
| Megarhyssa macrura subsp. icterosticta Michener, 1939 |
| Megarhyssa macrura subsp. lunator (Fabricius, 1781) |
| Megarhyssa macrura subsp. macrurus Linnaeus, 1771 |
| Megarhyssa phaeoptila Michener, 1939 |
| Megastylus Schiødte, 1839 |
| Megastylus ashmeadi Morrill, 1907 |
| Megastylus leptoderus Förster, 1871 |
| Megastylus orbitator Schiødte, 1839 |
| Megastylus pauxillus Förster, 1871 |
| Megastylus pumilio Förster, 1871 |
| Megastylus retroligatus Förster, 1871 |
| Melanichneumon Thomson, 1893 |
| Melanichneumon dilucidus (Cresson, 1874) |
| Melanichneumon heiligbrodtii (Cresson, 1877) |