Obscure Plant Bug 
Ocellated Shield Bug 
Ocirrhoe unimaculata 
Odontoptera carrenoi 
Odontotarsus caudatus 
Odontotarsus purpureolineatus 
Odontotarsus robustus 
Okanagana occidentalis 
Old world Date Bug 
Oleander Aphid 
Oleander seedbug 
Omyta centrolineata 
Oncocephalus pilicornis 
Oncomeris flavicornis 
Oncopeltus unifasciatellus 
Onega bracteata 
Onega orphne 
Onoralna falcata 
Orange Assassin Bug 
Orange Assassin Bug 
Orange Sharpshooter 
Orange Shield-backed Bug 
Orchard Cicada 
Orientopsaltria alticola