NORTH AMERICAN LAND MAMMALS. 223 



*Microtus mexicanus mezicanus (Saiissure). 



1861. Arvicola (Hemiotomys) mexicanus Saussure, Revue et 



magasin de zoologie, ser. 2, vol. 13, p. 3. January, 1861. 

 1885. Arvicola mexicanus True, Proc. U. S. Nat. Mus., vol. 7, 



(1884), p. 597. 1885. 



1897. [ Microtus] mexicanus Trouessart, Catal. Mamm. viv. foss., 

 p. 564. 



Type Locality. — Mount Orizaba, State of Puobla, Mexico. 

 Range. — Eastern Puebla and to the north and west, grading 

 into the subspecies phseus. 



t*Microtus mexicanus phaeus (Merriam). 



1892. Arvicola phxus Merriam, Proc. Biol. Soc. Washington, 

 vol. 7, p. 171. September 29, 1892. 



1900. Microtus mexicanus pTixus Bailey, North Amer. Fauna, 

 No. 17, p. 54. June 6, 1900. 



Type Locality. — North slope of Sierra Nevada de CoUma, State 

 of Jalisco, Mexico. Ahitude, 10,000 feet. 



Range. — Southern Jalisco and northward to northwestern Chi- 

 huahua; to eastward, grading into true mexicanus. Occupy- 

 ing the boreal and transition zones. 



t*Microtus mexicanus guadalupensis Bailey. 



1902. Microtus mexicanus guadalupensis Bailey, Proc. Biol. Soc. 



Washington, vol. 15, p. 118. June 2, 1902. 

 Type Locality. — Guadalupe Mountains, El Paso County, 

 Texas. Altitude, 7,800 feet. 



t* Microtus fulviventer Merriam. 



1898. Microtus fulviventer Merriam, Proc. Biol. Soc. Washing- 

 ton, vol. 12, p. 106. April 30, 1898. 



Type Locality. — Cerro San Felipe, State of Oaxaca, Mexico. 



Altitude, 10,200 feet. 

 Range. — Central part of the State of Oaxaca. 



*Microtus mogollonensis (Mearns). 



1890. Arvicola mogollonensis Mearns, Bull. Amer. Mus. Nat. 

 Hist., vol. 2, p. 283. February 21, 1890. 



1896. M[icrotus] mogollonensis Miller, Proc. Biol. Soc. Wash- 

 ington, vol. 11, p. 68. April 21, 1896. 



Type Locality. — Bakers Butte, Mogollon Mountains, Yavapai 

 County, Arizona. 



Range. — Plateau country of central Arizona. 



