| Metoponcus lineatus Schubert, 1909 |
| Metoponcus sinuatus Sharp, 1885 |
| Metoponcus varians Sharp, 1885 |
| Metrotyphlini Coiffait, 1963 |
| Mexiconnus Jaloszynski, 2013 |
| Mexiconnus mexicanus (Franz, 1994) |
| Mexigaster Park, 1952 |
| Mexigaster boneti Park, 1952 |
| Mexiplectus Park, 1943 |
| Mexiplectus emersoni Park, 1943 |
| Mexiplectus pudibundus Park, 1952 |
| Microbledius Herman, 1972 |
| Microdonia Casey, 1894 |
| Microdonia jacobsoni Kistner, 1996 |
| Microdonia mexicana Kistner, 1996 |
| Microdonia nitidiventris (Brues, 1904) |
| Microdonia occipitalis Casey, 1894 |
| Microglossa Stein, 1868 |
| Microglossa mexicana Sharp, 1883 |
| Microglotta Kraatz, 1862 |