1874.] 291 [Allen. 



11. Spermophilus Franklini. 



Arctomys Franklini Sabine, Linn. Trans., xiii, 587, 1822. 

 Spermophilus Franklini Baird, Mam. N. Am., 314, 1857. 

 Hab. Northern Illinois northward to the Saskatchewan. 



12. Spermophilus tereticaudus. 



Spermopliilus tereticaudus Baird, Mam. N. Am., 315, 1857. 

 Hob. Fort Yuma, California. 



13. Spermophilus tridecem-lineatus. 



a. var. tridecem-lineatus. 



Sciurus tridecem-lineatus Mitchell, Med. Repos., xxi, 248, 1821. 

 Spermophilus tridecem-lineatus Baird, Mam. N. Am., 316, 1857 (in 



part only). 

 Arctomys Hoodii Sabine, Linn. Trans., xxr, 590, 1822. 



Hab. The prairies of the United States, from Arkansas north- 

 ward to the Saskatchewan. 



b. var. pallidus. 



Spermopliilus tridecem-lineatus Baird, Mam. N. Am., 316, 1857 (in 

 part only). 

 Hab. The dry plains and deserts of the interior westward to the 

 Great Basin. 



14. Spermophilus mexicanus. 



Sciurus mexicanus Erxleben, Syst. Anim., 428, 1777. 

 Spermophilus mexicanus Baird, Mam. N. Am., 319, 1857. 



Hab. Southwestern Texas and Southern New Mexico, southeast- 

 ward into Mexico. 



15. Spermophilus spilosoma. 

 a. var. spilosoma. 



Spermophilus spilosoma Bennett, Proc. Zool. Soc. Lond., I, 40, 1835. 

 — Baird, Mam. N. Am., 321. 1857. 

 Hab. Western New Mexico west to the Pacific Coast. 



b. var. obsoletus. 



Spermophilus obsoletus Kennicott, Proc. Acad. Nat. Sci. Phila., 1863, 

 157. 



