| Calolydella summatis Reinhard, 1975 |
| Calothelaira Townsend, 1927 |
| Camarona Wulp, 1891 |
| Camarona caeruleonigra Wulp, 1891 |
| Camarona xanthogastra Wulp, 1891 |
| Carcelia Robineau-Desvoidy, 1830 |
| Carcelia flavirostris (Wulp, 1890) |
| Carcelia formosa (Aldrich & Webber, 1924) |
| Carcelia griseomicans (Wulp, 1890) |
| Carcelia grissemicans (Wulp, 1890) |
| Carcelia lagoae (Townsend, 1891) |
| Carcelia recilnata (Aldrich & Webber, 1924) |
| Carceliini Townsend, 1913 |
| Catalinovoria Townsend, 1926 |
| Catemophrys Townsend, 1908 |
| Celatoria Coquillett, 1890 |
| Celatoria compressa (Wulp, 1890) |
| Celatoria diabroticae (Shimer, 1871) |
| Celatoria nigricans (Wulp, 1890) |
| Cenosoma Wulp, 1890 |