NORTH AMERICAN LAND MAMMALS. 147 



*Peromyscus maniculatus osgoodi Mearns. 



1890. Ilesperomys leucopus nehrascensis Mearns, Bull. Amer. 

 Mus. Nat. Hist., vol. 2, p. 285. Described on page 287. 

 February 21, 1890. (Not Hesperomys sonoriensis var. nehras- 

 censis CouES, 1877.) 



1911. Peromyscus maniculatus osgoodi Mearns, Proc. Biol. Soc. 

 Washington, vol. 24, p. 102. May 15, 1911. (Substitute for 

 nehrascensis Mearns.) 



TiTE Locality. — Calf Creek, Custer County, Montana. 



Range. — ^Plains and foothills along the eastern base of the 

 Rocky Mountains from south central Saskatchewan to the 

 Panhandle of Texas, occupying in general the eastern parts of 

 JMontana, Wyoming, and Colorado, and the western and 

 southwestern parts of Saskatchewan and the Dakotas. Upper 

 Sonoran and transition zones. 



*Peromyscus maniculatus nehrascensis (Coues). 



1877. Ilesperomys sonoriensis var. nehrascensis Coues, Monogr. 

 N. Amer. Rodentia, p. 79. 

 tl905. Peromyscus luteus Osgood, Proc. Biol. vSoc. Washington, 

 vol. 18, p. 78. February 21, 1905. 



1911. Peromyscus maniculatus nehrascensis Mearns, Proc. Biol. 

 Soc. Washington, vol. 24, p. 102. May 15, 1911. 



Type Locality. — Deer Creek, western Nebraska. 



Range. — Sandhill region of western Nebraska and adjoining 

 parts of the States of Kansas, Colorado, South Dakota, and 

 Wyoming. Possibly extending north to western North Da- 

 kota and south to western Oldahoma. 



*Peromyscus maniculatus bairdii (Hoy and Kennicott). 



1857. Mus hairdii Hoy and Kennicott, in Kennicott, Agricul- 

 tural Report, U. S. Patent Office, 1856, p. 92. 



1885. Hesperomys michiganensis True, Proc. U. S. Nat. Mus., 

 vol. 7 (1884), p. 597. 1885. 



1909. Peromyscus maniculatus hairdi Osgood, North Amer. 

 Fauna, No. 28, p. 79. April 17, 1909. 



Type Locality. — Bloomington, McLean Count}', Illinois. 



Range. — Prairie region of the upper Mississippi Valle}^ in south- 

 ern Wisconsin, Minnesota, llHnois, Indiana, eastern Ohio, Iowa, 

 Missouri, Oklahoma, and the eastern or humid parts of Kansas, 

 Nebraska, vSouth Dakota, and North Dakota; north to southern 

 Manitoba. Upper Austral and transition zones, meeting the 

 range of P. m. nehrascensis along the border between the humid 

 and the arid subdivision. 



