Cabbage Seed Weevil 
Cactophagus amoenus 
Cambium Curculio 
Canada Thistle Bud Weevil 
Catasarcus transversalis 
Cercidocerus lateralis 
Chestnut weevil 
Chlorophanus viridis 
Cholus buckleyi 
Cholus cinctus 
Cionus alauda 
Cionus hortulanus 
Cionus tuberculosus 
Cionus variegatus 
Clover leaf weevil 
Cocklebur Weevil 
Coeliodes rana 
Coeliodes ruber 
Common Leaf Weevil 
Coniocleonus nigrosuturatus 
Cophes obtentus 
Cotaster cuneipennis 
Curculio villosus 
Dorytomus longimanus