Common Fruit Fly 
Common Globetail 
Common Green Colonel 
Common Halfband 
Common Horse Fly 
Common House Mosquito 
Common Lagoon Fly 
Common Ligyra Bee Fly 
Common Lovebug 
Common Picture-winged Fly 
Common red-legged robberfly 
Compost Fly 
Comptosia insignis 
Condylostylus caudatus 
Condylostylus comatus 
Condylostylus longicornis 
Condylostylus occidentalis 
Condylostylus patibulatus 
Condylostylus spp. 
Conophorus fenestratus 
Conops quadrifasciatus 
Copestylum fornax 
Cophinopoda chinensis 
Cordilura luteola