| Marshallius leucostictus (Champion, 1902) |
| Marshallius rotundicollis (Champion, 1902) |
| Marshallius rusticus (Klug, 1829) |
| Maseorhynchus Sharp, 1891 |
| Maseorhynchus hondurensis Sharp, 1891 |
| Mazenes Champion, 1911 |
| Mazenes lineatus Champion, 1911 |
| Mechistocerus Fauvel, 1863 |
| Mechistocerus barbicornis (Champion, 1910) |
| Mecinini Gistel, 1848 |
| Mecistocorynus Champion, 1905 |
| Mecistocorynus sinuatipes Champion, 1905 |
| Mecistostylina Lacordaire, 1865 |
| Megalocorynus Wollaston, 1873 |
| Megalocorynus depressus (Boheman, 1838) |
| Megalostylodes Champion, 1911 |
| Megalostylodes hirsutus Champion, 1911 |
| Megalostylus Chaudoir, 1842 |
| Megalostylus albicans (Lacordaire, 1863) |
| Megalostylus brevipilis Champion, 1911 |