| Ischnosoma durangoense Campbell, 1991 |
| Ischnosoma mexicanum Campbell, 1991 |
| Ischnosoma pecki Campbell, 1991 |
| Isomalus Erichson, 1839 |
| Isomalus bicolor Erichson, 1840 |
| Isomalus fasciatus LeConte, 1863 |
| Isomalus humilis Erichson, 1840 |
| Isomalus pallidipennis Fauvel, 1864 |
| Isomalus tenuis Fauvel, 1864 |
| Jubini Raffray, 1904 |
| Jubus Schaufuss, 1872 |
| Jubus boneti Park, 1952 |
| Jubus caviventris Raffray, 1891 |
| Jubus denticollis Schaufuss, 1877 |
| Jubus goodnighti Park, 1952 |
| Jubus gracilicornis Rafray, 1904 |
| Labidoculex Reichensperger, 1936 |
| Labidoculex antennalis Seevers, 1965 |
| Laetulonthus Moore & Legner, 1973 |
| Laetulonthus nobilis (Bernhauer, 1910) |