| Xanthoepalpus bicolor (Williston, 1886) |
| Xanthoepalpus bipartitus (Wulp, 1888) |
| Xanthoepalpus laetus (Wulp, 1892) |
| Xanthohystricia Townsend, 1913 |
| Xanthomelana Wulp, 1892 |
| Xanthomelanodes Townsend, 1893 |
| Xanthomelanodes arcuatus (Say, 1829) |
| Xanthomelanodes atripennis (Say, 1829) |
| Xanthomelanodes californicus Townsend, 1908 |
| Xanthomelanodes dorsalis (Wulp, 1892) |
| Xanthomelanodes gracilentus (Wulp, 1892) |
| Xanthomelanodes rubicundus (Wulp, 1892) |
| Xanthomelanodes trivitatus Reinhard, 1955 |
| Xanthomelanopsis Townsend, 1917 |
| Xanthomelanopsis articulata (Wulp, 1892) |
| Xanthomelanopsis trigonalis (Wulp, 1892) |
| Xanthophyto Townsend, 1916 |
| Xanthophyto versicolor (Wulp, 1890) |
| Xiphomyia Townsend, 1917 |
| Yahuarphryno Townsend, 1927 |