| Tamias dorsalis subsp. dorsalis Baird, 1855 |
| Tamias durangae J. A. Allen, 1903 |
| Tamias durangae subsp. durangae (J. A. Allen, 1889) |
| Tamias harrisii (Audubon & Bachman, 1854) |
| Tamias interpres Merriam, 1890 |
| Tamias leucurus Merriam, 1889 |
| Tamias leucurus subsp. peninsulae J. A. Allen, 1893 |
| Tamias merriami J. A. Allen, 1889 |
| Tamias obscurus J. A. Allen, 1890 |
| Tamias obscurus subsp. obscurus J. A. Allen, 1890 |
| Tamiasciurus Trouessart, 1880 |
| Tamiasciurus douglasi (Bachman, 1839) |
| Tamiasciurus douglasi subsp. mearnsi Townsend, 1897 |
| Tamiasciurus hudsonicus (Erxleben, 1777) |
| Tamiasciurus mearnsi (Townsend, 1897) |
| Xerinae Osborn, 1910 |
| Xerospermophilus Merriam, 1892 |
| Xerospermophilus perotensis (Merriam, 1893) |
| Xerospermophilus spilosoma (Bennett, 1833) |
| Xerospermophilus spilosoma subsp. altiplanensis (S. Anderson, 1972) |