| Siron dorsalis (Rosenschöld, 1837) |
| Siron exornatus (Boheman, 1837) |
| Sitona Germar, 1817 |
| Sitona californicus (Fåhraeus, 1840) |
| Sitona cylindricollis (Fåhraeus, 1840) |
| Sitona hispidulus (Fabricius, 1776) |
| Sitona lepidus Gyllenhal, 1834 |
| Sitona lineellus (Bonsdorff, 1785) |
| Sitona ordinarius (Fåhraeus, 1840) |
| Sitona vittatus (LeConte, 1857) |
| Sitonini Gistel, 1848 |
| Smicraulax Pierce, 1908 |
| Smicraulax arizonicus Sleeper, 1954 |
| Smicraulax piercei Burke, 1975 |
| Smicraulax tuberculatus Pierce, 1908 |
| Smicronychini Seidlitz, 1891 |
| Smicronyx Schönherr, 1843 |
| Smicronyx abnormis Dietz, 1894 |
| Smicronyx albidosquamosus Klima, 1934 |
| Smicronyx albonotatus Anderson, 1962 |