Byturus ochraceus 
Cabbage Seed Weevil 
Cabbage-stem Flea Beetle 
Cacodacnus planicollis 
Cacodaemon bellicosus 
Cacodaemon satanas 
Cactophagus amoenus 
Cactophagus ornatus 
Cadmus aurantiacus 
Cadmus australis 
Cadmus crucicollis 
Calais speciosus 
Calamobius filum 
Calathus melanocephalus 
Calcodes striatus 
California Glowworm 
Caliper Beetle 
Calleida decora 
Calleida punctata 
Callicaria superba 
Callidemum hypochalceum 
Callidiopis praecox 
Calligrapha floridana 
Calligrapha rowena