| Microstylum mexicanus Martin, 1960 |
| Microstylum morosum Loew, 1872 |
| Microstylum pollens Osten-Sacken, 1878 |
| Morimna Walker, 1851 |
| Nannocyrtopogon Wilcox & Martin, 1936 |
| Nannocyrtopogon lestomyiformis Wilcox & Martin, 1936 |
| Nannodioctria Wilcox & Martin, 1942 |
| Nannodioctria australis (Adisoemarto & Wood, 1975) |
| Negasilus Curran, 1934 |
| Negasilus astutus (Williston, 1893) |
| Neoeristicus Osten-Sacken, 1878 |
| Neomochtherus Osten-Sacken, 1878 |
| Neomochtherus californicus (Hine, 1909) |
| Neopogon Bezzi, 1910 |
| Nerax Hull, 1962 |
| Nerax affinis (Bellardi, 1861) |
| Nerax dolichogaster (Williston, 1901) |
| Nerax loewi (Bellardi, 1862) |
| Nerax mexicanus (Hine, 1919) |
| Nerax stigmosus (Carrera & D'Andretta, 1950) |