RODENTIA: CRICETIDAE 591 



Type Locality. — Six miles east of Hamilton, Ravalli County, Mont. Altitude, 

 3,700 feet. Range. — Flathead and Bitterroot Valleys of western Montana. 



Microtus montanus micropus Hall* 



1935. Microtus montanus micropus Hall, Univ. California Publ. Zool., vol. 40, 

 No. 12, p. 417, Oct. 25, 1935. 



Type Locality. — Cleveland Ranch, Spring Valley, White Pine County, Nev. 

 Altitude, 6,000 feet. Range. — Northern part of Nevada (extreme northeastern 

 corner excepted) south to Eagle Valley, Lincoln County; Monitor and Reese 

 River Valleys, Nye County; and northern end of Virginia Mountains, Washoe 

 County (Hall, Mammals of Nevada, p. 544, July 1, 1946) ; and Utah, generally 

 along western margins of Pleistocene Lake Bonneville (Durrant, Univ. Kansas 

 Publ. Mus. Nat. Hist., vol. 6, p. 51, Aug. 10, 1952) . 



Microtus montanus undosus Hall* 



1935. Microtus montanus undosus Hall, Univ. California Publ. Zool., vol. 40, 

 No. 12, p. 420, Oct. 25, 1935. 



Type Locality. — Lovelock, Pershing County, Nev. Range. — Humboldt and 

 Carson sinks and lower reaches of Humboldt River in west-central Nevada (Hall, 

 Mammals of Nevada, p. 547, July 1, 1946). 



Microtus montanus nevadensis V. Bailey f * 



1898. Microtus nevadensis V. Bailey, Proc. Biol. Soc. Washington, vol. 12, 



p. 86, Apr. 30, 1898. 

 1935. Microtus montanus nevadensis Hall, Univ. California Publ. Zool., vol. 



40, No. 12, p. 423, Oct. 25, 1935. 

 Type Locality. — Big salt marsh below Watkins Ranch, Ash Meadows, Nye 

 County, Nev. Range. — Known from type locality only. 



Microtus montanus f ucosus Hall 



1935. Microtus montanus fucosus Hall, Univ. California Publ. Zool., vol. 40, 

 No. 12, p. 421, Oct. 25, 1935. 



Type Locality. — -Hiko, Pahranagat Valley, Lincoln County, Nev. Altitude, 

 4,000 feet. Range. — Pahranagat Valley. 



Microtus montanus rivularis V. Baileyf * 



1898. Microtus nevadensis rivularis V. Bailey, Proc. Biol. Soc. Washington, 



vol. 12, p. 87, Apr. 30, 1898. 

 1900. Microtus montanus rivularis V. Bailey, North Amer. Fauna No. 17, p. 



29, June 6, 1900. 

 Type Locality. — St. George, Washington County, Utah. Range. — Tule marshes 

 along Virgin River, Washington County. 



Microtus montanus amosus Hall and Hayward 



1941. Microtus montanus amosus Hall and Hayward, Great Basin Naturalist, 

 vol. 2, No. 2 (June 30) , p. 105, July 20, 1941. 



Type Locality. — Torrey, Wayne County, Utah. Range. — Southern end of high 

 plateaus in Colorado River drainage and northward at lower elevations, and in 

 that part of Uinta Basin west of Green River, Utah (Kelson, Univ. Utah Biol. Ser., 

 vol. 11, No. 3, p. 97, Feb. 15, 1951) . 



