| Hypocaccus apricarius var. pseudoradiosus Thérond, 1948 |
| Hypocaccus bistrigifrons Lewis, 1905 |
| Hypocaccus dentipes Lewis, 1905 |
| Hypocaccus laxatus Lewis, 1905 |
| Hypocaccus parvus Mazur, 1984 |
| Hypocaccus permixtus Mazur, 1984 |
| Hypocaccus piscarius Lewis, 1905 |
| Hypocaccus strigilarius Hatch, 1962 |
| Idolia Lewis, 1885 |
| Idolia gibba Lewis, 1886 |
| Idolia integra Lewis, 1889 |
| Idolia laevigata Lewis, 1886 |
| Idolia laevissima (LeConte, 1852) |
| Idolia nucleola Bickhardt, 1917 |
| Iliotona Carnochan, 1917 |
| Iliotona beyeri Carnochan, 1917 |
| Iliotona cacti (LeConte, 1851) |
| Iliotona dorcoides (Lewis, 1888) |
| Isolomalus Lewis, 1907 |
| Isolomalus billineatus Lewis, 1907 |