| Hypexilis longipennis Linsley, 1935 |
| Hypexilis pallida Horn, 1885 |
| Hypomia Thomson, 1868 |
| Hypomia mexicana Thomson, 1868 |
| Ibidionini Thomson, 1861 |
| Idephrynus Bates, 1881 |
| Idephrynus scaber Bates, 1881 |
| Incertae sedis |
| Inermestola Breuning, 1942 |
| Inermestola chiapasensis Galileo & Moysés, 2013 |
| Ipochus LeConte, 1852 |
| Ipochus fasciatus LeConte, 1852 |
| Ipochus insularis Blaisdell, 1925 |
| Ironeus Bates, 1872 |
| Ironeus curoei Santos-Silva, Botero & Le Tirant, 2018 |
| Ironeus duplex Bates, 1872 |
| Ironeus mutatus Bates, 1885 |
| Ironeus pulcher Bates, 1880 |
| Ischionodonta Chevrolat, 1859 |
| Ischionodonta mexicana Giesbert & Chemsak, 1993 |