274 BULLETIN 17 8, UNITED STATES NATIONAL MUSEUM 



fMicrotus elymocetes Osgood. 



Proc. Biol. Soc. Washington 19 : May 1, 1906. 

 137323. Skin and skull. Adult male. East side of Montague 

 Island, Prince William Sound, Alaska. May 12, 1905. Col- 

 lected by C. Sheldon. Original number 8 (5448-X). 

 Well-made skin in good condition ; skull Grade A. 



fMicrotus fulviventer Merriam. 



Proc. Biol. Soc. Washington 12: 106, Apr. 30, 1898. 

 68250. Skin and skull. Adult male. Cerro San Felipe, altitude 

 10,200 feet, Oaxaca, Mexico. August 22, 1894. Collected by 

 E. W. Nelson and E. A. Goldman. Original number 6601. 

 Well-made skin in good condition; skull Grade B. 



fMicrotus guatemalensis Merriam. 



Proc. Biol. Soc. Washington 12 : 108, Apr. 30, 1898. 

 76777. Skin and skull. Adult male. Todos Santos, altitude 

 10,000 feet, Huehuetenango, Guatemala. December 30, 1895. 

 Collected by E. W. Nelson and E. A. Goldman. Original num- 

 ber 8960. 



Well-made skin in good condition ; skull Grade A. 



*Arvicola (Pedomys) haydenii Baird. 



Mammals of North America, p. 543, 1857. 

 =Microius oclirogaster haydenii (Baird). See Osgood, Proc. Biol. Soc. Wash- 

 ington 20 : 48, Apr. 18, 1907. 



Ygg^. Skin and skull. Adult male. Collected in 1854 by F. V. 



Hayden at Fort Pieri-e, then in "Nebraska," noAV in Stanley 

 County, S. Dak. 



Skin badly made up, legs spreading, vertebrae not removed from tail ; 

 a small patch oti each side of body without hair; general condition of 

 pelage good. Skull Grade A. 



This was Baird's only specimen and was designated by number. 



fMicrotus innuitus Merriam. 



Proc. Washington Acad. Sci. 2: 21, Mar. 14, 1900. 

 99373. Skull only. Adult. St. Lawrence Island, Bering Sea, 

 Alaska. July 13, 1899. Collected by C. Hart Merriam. 

 Skull obtained from an owl pellet ; Grade B. 



*Microtus insularis Bailey. 



Proc. Biol. Soc. Washington 12: 86, Apr. 30, 1898. (Not of Nilsson, 1844.) 

 =Microtus nesophilus Bailey. See Bailey, Science (new ser.) 8: 783, Dec. 2, 

 1898. (Substitute for insularis Bailey.) 



