NORTH AMERICAN RECENT MAMMALS. 417 



mexicanus-group . 



*Microtus mexicanus (Saussure). 



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, Puebla, Mexico. 

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

 into the subspecies fhseus. 



t*Microtus mexicanus phaeus (Merriam). 



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

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



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

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



Type Locality. — North slope of Sierra Nevada de Colima, 

 Jalisco, Mexico. Altitude, 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 guadahipensis BAiLEYj'fProc. 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, Oaxaca, Mexico. Altitude, 



10,200 feet. 

 Range. — Central part of the State of Oaxaca. 



*Microtus mogoUonensis (Mearns). 



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

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



1897. M[icrotus] mogoUonensis Miller, Proc. Biol. Soc. Wash- 

 ington, vol. 11, p. 68. April 21, 1897. 



Type Locality. — Baker's Butte, Mogollon Mountains, Yavapai 

 County, Arizona. 



Range. — Plateau country of central Arizona. 



57506—24 28 



