| Megalostylus dilaticollis Champion, 1911 |
| Megalostylus fusiformis Champion, 1911 |
| Megalostylus macrophthalmus Champion, 1911 |
| Megalostylus rhodopus Boheman, 1840 |
| Megalostylus splendidus Chevrolat, 1878 |
| Megalostylus sturmi Boheman, 1840 |
| Megalostylus tomentosus Champion, 1911 |
| Merocnemus Faust, 1896 |
| Merocnemus binotatus (Boheman, 1844) |
| Mesoptiliinae Lacordaire, 1863 |
| Mestorus Schönherr, 1840 |
| Mestorus adumbratus Fåhraeus, 1840 |
| Mestorus crinitus Sharp, 1891 |
| Mestorus gracilis Fåhraeus, 1840 |
| Metadupus Schönherr, 1837 |
| Metadupus nodatus Boheman, 1837 |
| Metrania Pascoe, 1872 |
| Metrania palliata Pascoe, 1872 |
| Metriophilus Faust, 1896 |
| Metriophilus definitus (Rosenschöld, 1837) |