Nygmia solitaria 
Nygmia xanthomela 
Oeonistis altica 
Oeonistis bicolora 
Oldwife Underwing 
Ommatophora luminosa 
Omnivorous Tussock Moth 
Once-married underwing 
Onythes pallidicosta 
Onythes roseidorsata 
Opharus albijuncta 
Ophisma basigutta 
Ophiusa parcemacula 
Ophiusa trapezium 
Ophyx ochroptera 
Orange footman 
Orange Holomelina 
Ormetica ameoides 
Ormetica collateralis 
Ormetica packardi 
Ornate Bella Moth 
Ornate tiger moth 
Ossonoba torpida 
Oxacme commotoides