Northern pine looper 
Northern selenium 
Nothomiza flavicosta 
Oak Beauty 
Oak Beauty 
Oak besma 
Obtuse Euchlaena 
Oenochlora imperialis 
Oenochroma hieroglyphica 
Oenoptila purpurea 
Oenoptila recessa 
Oligopleura aulaeata 
Olive-and-black carpet 
Omiza herois 
Omiza lycoraria 
Omnivorous Looper 
One-spotted variant moth 
Oospila latimargo 
Oospila quinquemaculata 
Ophthalmitis basiscripta 
Ophthalmitis rufilauta 
Ophthalmitis satoi 
Ophthalmitis viridior 
Opisthoxia branickiaria