RODENTIA: CRICETIDAE 449 



1884. Ochetodon montanus True, Proc. U. S. Nat. Mus., vol. 7 ( App., Circ. 29) , 



p. 598, Nov. 29, 1884. 

 1893. Reithrodontomys montanus J. A. Allen, Bull. Amer. Mus. Nat. Hist., 



vol. 5, p. 80, Apr. 28, 1893. 

 1935. Reithrodontomys montanus montanus Benson, Journ. Mamra., vol. 16, 

 No. 2, p. 141, May 15, 1935. (See also, Hill and Hibbard, Journ. Mamm., 

 vol. 24, No. 1, p. 24, Feb. 20, 1943.) 

 Type Locality. — Rocky Mountains, lat. 39° N. (Regarded as probably near 

 upper end of San Luis Valley, Saguache County, Colo., by J. A. Allen, Bull. 

 Amer. Nat. Hist., vol. 7, p. 124, May 21, 1895; and as very probably on Medano 

 Creek, Alamosa County, Colo., by Warren, The Mammals of Colorado, . . . , 

 p. 196, 1942.) Range. — Intermontane plains and valleys of southern Colorado, 

 western New Mexico, trans-Pecos Texas, and northwestern Mexico. Known range 

 from Saguache County, Colo., south to vicinity of Agua Prieta, northeastern 

 Sonora, and Canutillo, northern Durango. Vertical range from 4,000 feet at 

 Agua Prieta to about 7,500 feet in San Luis Valley, Colo. (Hooper, Univ. Michi- 

 gan Mus. Zool. Misc. Publ. 77, pp. 37-38, Jan. 16, 1952) . 



Reithrodontomys montanus albescens Caryf * 



1903. Reithrodontomys albescens Cary, Proc. Biol. Soc. Washington, vol. 16, 



p. 53, May 6, 1903. 

 1935. Reithrodontomys montanus albescens Benson, Journ. Mamm., vol. 16, 

 No. 2, p. 141, May 15, 1935. (See also Hill and Hibbard, Journ. Mamm., 

 vol. 24, No. 1, p. 24, Feb. 20, 1943.) 

 Type Locality. — Eighteen miles northwest of Kennedy, Cherry County, Nebr. 

 Range. — Sand-hill region of Nebraska and western South Dakota; west to Love- 

 land, Larimer County, and to extreme southeastern Colorado (F. W. Miller, Journ. 

 Mamm., vol. 9, No. 4, p. 338, Nov. 13, 1928) ; and south to Morton, Meade, 

 Clark, Barber, and Harper Counties, Kansas (Cockrum, Univ. Kansas Publ. Mus. 

 Nat. Hist., vol. 7, No. 1, p. 168, Aug. 25, 1952). 



Reithrodontomys montanus griseus V. Baileyf * 



1905. Reithrodontomys griseus V. Bailey, North Amer. Fauna No. 25, p. 106, 

 Oct. 24, 1905. 



1935. Reithrodontomys montanus griseus Benson, Journ. Mamm., vol. 16, No. 2, 

 p. 141, May 15, 1935. 



Type Locality. — San Antonio, Bexar County, Tex. Range. — Southern Ne- 

 braska, Kansas (Hibbard, Trans. Kansas Acad. Sci., vol. 47, p. 77, September 

 1944), Oklahoma (Blair, Amer. Midi. Nat., vol. 22, No. 1, p. 117, July 1939), 

 northern Texas (Hooper, Univ. Michigan Mus. Zool. Misc. Publ. 77, p. 39, Jan. 

 16, 1952), and eastern New Mexico (V. Bailey, North Amer. Fauna No. 53 

 (December 1931), p. 165, Mar. 1, 1932). 



Reithrodontomys burti Benson 



1939. Reithrodontomys burti Benson, Proc. Biol. Soc. Washington, vol. 52, 

 p. 147, Oct. 11, 1939. 



Type Locality. — Rancho de Costa Rica, Rio Sonora, Sonora, Mexico. Range. — 

 Coastal flood plains of western Sonora from Rio Sonora south to near Guaymas. 

 Known vertical range from 300 to 600 feet. 



