| Megalomyrmex drifti Kempf, 1961 |
| Megalomyrmex incisus Smith, 1947 |
| Megalomyrmex megadrifti Boudinot, Sumnicht & Adams, 2013 |
| Megalomyrmex silvestrii Wheeler, 1909 |
| Megalomyrmex sjostedti Wheeler, 1925 |
| Megalomyrmex sjostedti var. langi Wheeler, 1925 |
| Megalomyrmex wheeleri Weber, 1940 |
| Meranoplini Emery |
| Meranoplus Smith, 1853 |
| Meranoplus difformis Smith, 1858 |
| Messor Forel, 1890 |
| Messor andrei (Mayr, 1886) |
| Messor andrei subsp. castaneus Wheeler & Creighton, 1934 |
| Messor andrei subsp. flavus Wheeler & Creighton, 1934 |
| Messor julianus (Pergande, 1894) |
| Messor pergandei (Mayr, 1886) |
| Messor stoddardi (Emery, 1895) |
| Microbolbos Donisthorpe, 1948 |
| Moellerius Forel, 1893 |
| Monomorium Mayr, 1855 |