Cosmosoma stilbosticta 
Cosmosoma thiacia 
Cossedia proesei 
Cotton bollworm moth 
Cotton leaf roller 
Cotton Tipworm 
Cotton Web Spinner 
Cottonwood Dagger Moth 
Cottonwood Twig Borer 
Couchgrass Webworm 
Coxcomb Prominent 
Cozola subrana 
Crambid Moth 
Crambus lathoniellus 
Crambus pascuella 
Crambus perlella 
Cramer's Eighty-eight 
Cramer's Satyr 
Cranberry Blue 
Crasilogia gressitti 
Craspedosis arycandata 
Craspedosis aurigutta 
Craspedosis uniplaga 
Cratoptera zarumata