| Xanthomicrodus Cameron, 1904 |
| Xenosternum Muesebeck, 1935 |
| Xenosternum ornigis Muesebeck, 1935 |
| Xestapanteles Cameron, 1910 |
| Xynobius Förster, 1862 |
| Yelicones Cameron, 1887 |
| Yelicones arizonus Quick, Chishti & Basibuyuk, 1996 |
| Yelicones confusus Quick, Chishti & Basibuyuk, 1996 |
| Yelicones delicatus (Cresson, 1872) |
| Yelicones howdeni Quick, Chishti & Basibuyuk, 1966 |
| Yelicones infuriatus Quick, Chishti & Basibuyuk, 1966 |
| Yelicones pilops Quicke & Kruft, 1995 |
| Yelicones setosus Quick, Chishti & Basibuyuk, 1996 |
| Yelicones tricolor Quick, Chishti & Basibuyuk, 1996 |
| Zacremnops Sharkey & Wharton, 1985 |
| Zacremnops chiriquensis Cameron, 1887 |
| Zacremnops coatlicue Sharkey, 1990 |
| Zacremnops cressoni Cameron, 1887 |
| Zacremnops ekchuah Sharkey, 1990 |
| Zacremnops oranensis de Fernandez, 1987 |