MILLER AND REHN: NORTH AMERICAN MAMMALS. 129 
Microtus minor (Merriam). 
1888. Arvicola austerus minor Merriam, Amer. nat., xxii, 
p. 600. July, 1888. 
1900. Microtus minor Vi North Amer. fauna, no. 17, 
p. 75. June 6, 1900. 
Type locality". — Bottineau, at base of Turtle Mountains, 
Bottineau CountY", North Dakota. 
*/ > 
Subsfenus Orthrioyiy"S Merriam. 
O 
1898. Orthriomys Merriam, Proc. biol. soc. Washington, xii, 
* _ 
p. 106. April 30, 1898. Tyjie. — Microtus umhrosus Merriam. 
Microtus umbrosus Merriam. 
1898. Microtus umbrosus Merriam, Proc. biol. soc. Wash¬ 
ington, XII, p. 107. April 30, 1898. 
Ty"pe LOCALITY". — Mouiit Zempoaltepcc, State of Oaxaca, 
Mexico. Altitude, 8200 feet. 
Subgenus Herpetomy"S Merriam. 
1898. Ilerpetomys Merriam, Proc. biol. soc. Washington, xii, 
p. 107. April 30,1898. Tjqie.— Microtus guatemcdensis^l.'E.n^iKM. 
Microtus guatemalensis Merriam. 
1898. Microtus guatemalensis Merriam, Proc. biol. soc. 
Washington, xii, p. 108. April 30, 1898. 
Ty"pe LOCALITY". — Todos Santos, State of Huehuetenango, 
Guatemala. Altitude, 10,000 feet. 
