Buffalo treehopper 
Bulrush Bug 
Bythopsyrna circulata 
Bythopsyrna raapi 
Bythopsyrna tineoides 
Cabbage Bug 
Cabbage Whitefly 
Cacopsylla fulguralis 
Caldwelliola tharma 
Calico Scale 
California Bordered Plant Bug 
California maple aphid 
Calliclopius nigripes 
Calliphara nobilis 
Calliphara regalis 
Callococcus acaciae 
Callogaeana festiva 
Calocoris affinis 
Calocoris nemoralis 
Calocoris roseomaculatus 
Calophya nigripennis 
Calyptoproctus marmoratus 
Camptopus lateralis 
Campyloneura virgula