| Lydinolydella humeralis (Wulp, 1890) |
| Macquartiini Robineau-Desvoidy, 1830 |
| Macromeigenia Brauer & Bergenstamm, 1891 |
| Macrometopa Brauer & Bergenstamm, 1889 |
| Macrometopa calogaster (Bigot, 1889) |
| Macrometopa mexicana Brauer & Bergenstamm, 1889 |
| Macromya Robineau-Desvoidy, 1830 |
| Macromya crocata Reinhard, 1968 |
| Macromyini Townsend, 1936 |
| Madremyia Townsend, 1916 |
| Madremyia parva Townsend, 1916 |
| Madremyia saundersii (Williston, 1889) |
| Makasinocera Townsend, 1915 |
| Masiphya Brauer & Bergenstamm, 1891 |
| Masiphya biseriata (Wulp, 1890) |
| Masiphya confusa Aldrich, 1925 |
| Masiphya ruficauda (Wulp, 1890) |
| Masiphya subtilipalpis (Wulp, 1890) |
| Masiphya townsendi Aldrich, 1925 |
| Masiphyini Townsend, 1936 |