Caesar Greenbottle Fly 
Calliphora stygia 
Calycomyza flavinotum 
Calycomyza menthae 
Cardiocladius obscurus 
Carolinian Elegant 
Caryadiplosis venicola 
Caryomyia holotricha 
Caryomyia leviglobus 
Caryomyia spherica 
Caryomyia stellata 
Caryomyia tuberidolium 
Cattail Mosquito 
Celery Fly 
Celticecis globosa 
Cephaloconus tenebrosus 
Cephenemyia phobifer 
Cerdistus rusticanoides 
Cerdistus varifemoratus 
Cerodontha angulata 
Chaetocoelopa sydneyensis 
Chaetopsis fulvifrons 
Chaoborus albatus 
Chaoborus flavicans