604 U. S. NATIONAL MUSEUM BULLETIN 205 



1950. M[icrotus] r[atticeps] operarius Ognev, The mammals of Russia 

 (U.S.S.R.) and adjacent countries, Publ. Acad. Sci. U.S.S.R., vol. 7, p. 258. 

 (Ognev, Comptes Rendus Acad. Sci. U.S.S.R., new ser., vol. 44, No. 4, 

 p. 165, 1944, states that Microtus oeconomus Pallas, 1776, was based 

 on a form of Microtus (Stenocranius) gregalis. The American forms pre- 

 viously referred to oeconomus were subsequently listed by Ognev (The 

 mammals of Russia (U.S.S.R.) and Adjacent Countries, Publ. Acad. Sci. 

 U.S.S.R., vol. 7, p. 258, 1950) as subspecies of Microtus ratticeps. For 

 status see also Ellerman and Morrison-Scott, Checklist of Palaearctic and 

 Indian mammals 1758 to 1946, Publ. Brit. Mus. (Nat. Hist.), p. 705, Nov. 

 19, 1951.) 



Type Locality. — St. Michael, Norton Sound, Alaska. Range. — Coast of Alaska 

 from Bristol Bay northward to Kotzebue Sound. 

 Microtus oeconomus innuitus Merriamf * 



1900. Microtus innuitus Merriam, Proc. Washington Acad. Sci., vol. 2, p. 21, 

 Mar. 14, 1900. 



1942. [M]icrotus oec[onomus] innuitus Zimmermann, Arch. Naturg., Berlin, 

 n. F., vol. 11, No. 2, p. 188, Sept. 10, 1942. 



1950. M[icrotus] r[atticeps] innuitus Ognev, The mammals of Russia 

 (U.S.S.R.) and adjacent countries, Publ. Acad. Sci. U.S.S.R., vol. 7, p. 258. 



Type Locality. — Northeast Cape, St. Lawrence Island, Bering Sea, Alaska. 

 Range. — Known from St. Lawrence Island only. 

 Microtus oeconomus punukensis Hall and Gilmore 



1932. Microtus innuitus punukensis Hall and Gilmore, Univ. California Publ. 

 Zool, vol. 38, No. 9, p. 399, Sept. 17, 1932. 



1942. M[icrotus] oec[onomus] punukensis Zimmermann, Arch. Naturg., 

 Berlin, n. F., vol. 11, No. 2, p. 188, Sept. 10, 1942. 



1950. M[icrotus] r[atticeps] punukensis Ognev, The mammals of Russia 

 (U.S.S.R.) and adjacent countries, Publ. Acad. Sci. U.S.S.R., vol. 7, 

 p. 258. 



Type Locality. — Big Punuk Island, near east end of St. Lawrence Island, 

 Bering Sea, Alaska. Range. — Big Punuk Island. 



Microtus oecononius amakensis Murief " 



1930. Microtus amakensis Murie, Journ. Manim., vol. 11, No. 1, p. 74, Feb. 11, 



1930. 

 1952. Microtus oeconomus amakensis Hall and Cockrum, Univ. Kansas Publ. 



Mus. Nat. Hist., vol. 5, No. 23, p. 309, Nov. 17, 1952. 

 Type Locality. — Amak Island, Bering Island, Alaska. Range. — Known from 

 type locality only. 

 Microtus oeconomus unalascensis Merriamf* 



1897. Microtus unalascensis Merriam, Proc. Biol. Soc. Washington, vol. 11, 



p. 222, July 15, 1897. 

 1942. M[icrotus] oec\onomus] unalascensis Zimmermann, Arch., Naturg., 



Berlin, n. F., vol. 11, No. 2, p. 187, Sept. 10, 1942. 

 1950. M[icrotus] r[atticeps] unalascensis Ognev, The mammals of Russia 

 (U.S.S.R.) and adjacent countries, Publ. Acad. Sci. U.S.S.R., vol. 7, p. 258. 

 Type Locality. — Unalaska, Alaska. Range. — Unalaska Island. 



