86 MICROTUS. 



Microtus mexicanus guadalupensis Bailey. Biological Survey coll. 



Trof. Hiol. Soc. Wash., XV, pi.. 11S-I19, June 2, 11»02. 



l»>l>r.»L Skin and skull. Adult male, (luadalupc Mountains, Texas; 

 altitude, 7,S0() foet. August 21, VM)i. Collected l)y V. Bailey. 

 Orioinal number TSOT. 



Wt'U-miule skill in jjood coiidition; skull perfect. 



Microtus guatemalensis Mcrriani. Biological Survey collection. 



Proc. Biol. 8oc. Wash., XII, p. 108, April ?,0, 1898. 



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

 Guatemala. December 30, 1895. Collected by E. W. Nelson and 

 E. A. (loldman. Original number HUQO. 



Well-made skin in >rood condition; skull jierfect. 



Arvicola (Pedomys) haydenii Baird. 



Mammals of North America, p. 543, 1857. 

 = Microtus ochrogaster haydenii (Baird). See Osgood, Proc. Biol. Soc, Wash., 

 XX, p. 4S, April 18, 1907. 



yVffV. Skin and skull. Adult male. Collected in 1854 l)y Hr. F. V. 

 Ilaj^den at Fort Pierre, then in "Nebraska,"'' now in Stanley 

 County, South Dakota. Catalogued May 19, 1855. 



Skin badly made up, legs spreading, tail not skinned out; a small patch on 

 each side of body without hair; general condition of pelage good. Skull in good 

 condition, but left half of mandible lost. 



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



Microtus innuitus Merriam. Biological Survey collection. 



Proc. Wash. Acad. Sci., II, pj*. 21-22, March 14, 1900. 



99873. Skull only. Adult. St. Lawrence Island, Bering Sea. July 

 13, 1899. Collected I)y Dr. C. Hart Merriam. 



Skull obtained from an owl pellet; slightly stained; last left upper molar miss- 

 ing; left jiarietal slightly fractured; left coronoid process and rigiit mandibular 

 ramus missing. 



Microtus kadiacensis Merriam. Biological Survey collection. 



Proc. Biol. Hoc. Wash., XI, p. 222, July 15, 1897. 

 = Microtus operarius kadiacensis IMerriam. See Osgood, North Amer. Fauna, No. 

 21, p. 64, September 2(i, 1901. 



65827. Skin and skull. Young adult female. Kodiak Island, Alaska. 

 September 12, 1893. Collected l)y B. J. Bretherton. Original 

 number 213. 



Well-made skin in gf)od condition; skull j>erfect excei)t fur absence of left 

 audital bulla. 



