| Megacyllene snowi subsp. snowi (Casey, 1912) |
| Megaderus Dejean, 1821 |
| Megaderus bifasciatus Dupont, 1836 |
| Meganeflus Linsley, 1961 |
| Meganeflus fulvipennis (Bates, 1892) |
| Meganoplium Linsley, 1940 |
| Meganoplium imbelle (LeConte, 1881) |
| Megapsyrassa Linsley, 1961 |
| Megapsyrassa atkinsoni Chemsak & Giesbert, 1986 |
| Megapsyrassa auricomis (Chemsak & Linsley, 1963) |
| Megapsyrassa chiapaneca Giesbert, 1993 |
| Megapsyrassa linsleyi Chemsak & Giesbert, 1986 |
| Megapsyrassa puncticollis (Chemsak & Linsley, 1963) |
| Megapsyrassa testacea Giesbert, 1993 |
| Megapurpuricenus Eya, 2015 |
| Megapurpuricenus magnificus (LeConte, 1875) |
| Megasemum Kraatz, 1879 |
| Megasemum asperum (LeConte, 1854) |
| Megosmidus Hovore, 1988 |
| Megosmidus tuberculatus Hovore, 1988 |