| Ammospermophilus Merriam, 1892 |
| Ammospermophilus harrisii (Audubon & Bachman, 1854) |
| Ammospermophilus harrisii subsp. harrisii (Audubon & Bachman, 1854) |
| Ammospermophilus harrisii subsp. kinoensis Huey, 1937 |
| Ammospermophilus harrisii subsp. saxicola (Mearns, 1896) |
| Ammospermophilus insularis E. W. Nelson & Goldman, 1909 |
| Ammospermophilus interpres (Merriam, 1890) |
| Ammospermophilus leucurus (Merriam, 1889) |
| Ammospermophilus leucurus subsp. canfieldae Huey, 1929 |
| Ammospermophilus leucurus subsp. extimus E. W. Nelson & Goldman, 1929 |
| Ammospermophilus leucurus subsp. insularis E. W. Nelson & Goldman, 1909 |
| Ammospermophilus leucurus subsp. leucurus (Merriam, 1889) |
| Ammospermophilus leucurus subsp. peninsulae (J. A. Allen, 1893) |
| Arctomys Ord, 1815 |
| Arctomys beecheyi Richardson, 1829 |
| Arctomys ludoviciana Ord, 1815 |
| Callospermophilus Merriam, 1897 |
| Callospermophilus madrensis Merriam, 1901 |
| Citellus Oken, 1816 |
| Citellus adocetus Merriam, 1903 |