| Obrima Walker, 1856 |
| Obrima cymbae Pogue, 1998 |
| Obrima pyraloides Walker, 1856 |
| Obrima rinconada Schaus, 1894 |
| Ochrodota Hampson, 1901 |
| Ochrodota pronapides (Druce, 1894) |
| Odozana Walker, 1865 |
| Odozana unica Schaus, 1905 |
| Ommatochila Butler, 1894 |
| Ommatochila mundula (Zeller, 1872) |
| Omoptera Guérin-Méneville, 1832 |
| Omopterini Boisduval, 1833 |
| Opharus Walker, 1855 |
| Opharus bimaculata (Dewitz, 1884) |
| Opharus calosoma (Dyar, 1912) |
| Opharus consimilis Hampson, 1901 |
| Opharus euchaetiformis Edwards, 1884 |
| Opharus immanis (Edwards, 1884) |
| Opharus jacca Druce, 1897 |
| Opharus linus Druce, 1897 |