RODENTIA: SCIURIDAE 203 



Colorado and northwestern New Mexico; north to Monticello, Utah; east to 

 Thoreau, N. Mex.; south to Holbrook, Ariz.; west to Little Colorado River. 

 Zonal range, Upper and Lower Sonoran. 



Citellus spilosoma obsoletus (Kennicott) f* 



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



vol. 15, p. 157. 

 1884. Spermophilus obsoletus True, Proc. U. S. Nat. Mus., vol. 7 (App., 



Circ. 29) , p. 594, Nov. 29, 1884. 

 1904. [Citellus] obsoletus Trouessart, Catalogus Mammalium . . . . , suppl., 



fasc. 2, p. 340. 

 1938. Citellus spilosoma obsoletus A. H. Howell, North Ainer. Fauna No. 56 



(April), p. 130, May 18, 1938. 

 Type Locality. — "Fifty miles west of Fort Kearney, Nebraska" (A. H. Howell, 

 op. cit., p. 131) ; therefore probably in the western half of Dawson County. 

 Range. — Sandhill region of Nebraska; north to Todd County, S. Dak.; east to 

 Neligh, Antelope County, Nebr.; south to Tuttle, Kit Carson County, Colo., and 

 extreme northwestern Kansas (Hibbard, Trans. Kansas Acad. Sci., vol. 47, p. 73, 

 September 1944) ; west to Platte County, Wyo,, and Greeley, Weld County, 

 Colo. Zonal range, Upper Sonoran. 



Citellus perotensis (Merriam)t* 



1893. Spermophilus perotensis Merriam, Proc. Biol. Soc. Washington, vol. 8, 

 p. 131, Dec. 28, 1893. 



1904. [Citellus] perotensis Elliot, Field Columb. Mus. Publ. 95, Zool. Ser., 

 vol. 4, pt. 1, p. 145, Aug. 2, 1904. 



Type Locality. — Perote, Veracruz, Mexico. Range. — Extreme eastern border 

 of Mexican tableland in vicinity of Perote, Veracruz, at altitudes of from 7,800 

 to 7,900 feet. Ranges to a point 10 miles south of Perote and eastward to with- 

 in a few miles of Las Vigas. Recorded also from near San Salvador and Laguna 

 de las Minas, Puebla (Davis, Journ. Mamm., vol. 25, No. 4, p. 383, Dec. 12, 

 1944). Zonal range, Upper Sonoran. 



Subgenus POLIOCITELLUS A. H. Howell 



1938. Poliocitellus A. H. Howell, North Amer. Fauna No. 56, (April) , p. 42, 

 May 18, 1938. (Type, Arctomys franklinii Sabine.) 



Citellus franklinii (Sabine) * 



1822. Arctomys franklinii Sabine, Trans. Linn. Soc. London, vol. 13, p. 587. 



1884. Spermophilus franklini True, Proc. U. S. Nat. Mus., vol. 7 (App., 

 Circ. 29) , p. 594, Nov. 29, 1884. 



1904. [Citellus] franklini Trouessart, Catalogus Mammalium . . . , Suppl., 

 fasc. 2, p. 342. 



Type Locality. — Vicinity of Carlton House, Saskatchewan, Canada. (See 

 Preble, North Amer. Fauna No. 27, p. 165, Oct. 26, 1908.) Range.— Great 

 Plains region of southern Canada, north to Athabaska Landing, Alberta, Prince 

 Albert National Park, Saskatchewan, and Lake Winnipeg, Manitoba; east to 

 Emo and Rainy River in extreme southwestern Ontario (Anderson, Nat. Mus. 

 Canada Bull. 102 (1946) pp. 111-112, Jan. 24, 1947); in upper Mississippi 

 and Missouri Valleys of United States, west to Missouri River in North Dakota 



