| Cryptus sodalis Cameron, 1885 |
| Cryptus sodalis subsp. sodalis Cameron, 1885 |
| Cryptus sororia Cresson, 1872 |
| Cryptus texanus Howard, 1898 |
| Cryptus ultimus Cresson, 1864 |
| Cryptus xanthostigma Brullé, 1846 |
| Ctenichneumon Thomson, 1894 |
| Ctenichneumon properatus (Morley, 1915) |
| Ctenichneumon ruidosensis (Cockerell, 1898) |
| Ctenopelma Holmgren, 1857 |
| Ctenopelma pulchra Cresson, 1865 |
| Ctenopelmatinae Förster, 1869 |
| Ctenopelmatini Förster |
| Ctenopimpla Cameron, 1899 |
| Cyanojoppa Cameron, 1902 |
| Cyclolabus Heinrich, 1936 |
| Cyclolabus frivolus (Cresson, 1868) |
| Cylloceria Schiødte, 1838 |
| Cylloceria arizonensis Dasch, 1992 |
| Cylloceriinae Wahl, 1990 |