414 ^ BUIoLETlN 128, UNITED STATES NATIONAL MUSEUM. 



dbbreviatus-group. 



t*Microtus abbreviatus abbreviatus Miller. 



1899. Microtus abbreviatus Miller, Proc. Biol. Soc. Washington, 

 vol. 13, p. 13. January 31, 1899. 



Type Locality.— Hall Island, Bering Sea, Alaska. 

 Range. — Kno\>ii only from Hall Island. 



t*Microtus abbreviatus fisheri Merriam. 



1900. Microtus abhreviatus fisheri Merriam, Proc. Washington 

 Acad. Sci., vol. 2, p. 23. March 14, 1900. 



Type Locality. — St. Matthew Island, Bering Sea, Alaska. 

 Range. — Known only from St. ]\Iatthew Island. 



t*Microtus miurus miurus Osgood. 



1901. Microtus miurus Osgood, North Amer. Fauna, No. 21,. 

 p. 64. September 26, 1901. 



Type Locality. — Head of Bear Creek, in mountains near Hope 

 City, Turnagain Arm, Cook Inlet, Alaska. 



t*Microtus miurus oreas Osgood. 



1907. Microtus miurus oreas Osgood, Proc. Biol. Soc. Washing- 

 ton, vol. 20, p. 61. April 18, 1907. 

 Type Locality. — Toklat River, Alaskan Range, Alaska. 



townsendii-groui^. 



*Microtus townsendii (Bachman). 



1839. Arvicola townsendii Bachman, Journ. Acad. Nat. Sci. 



Philadelphia, vol. 8, pt. 1, p. 60. 

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



(1884), p. 597. 1885. (Part.) 

 1896. M[icrotus] toimisendi Miller, North iVmer. Fauna, No. 12, 



p. 66. July 23, 1896. 

 Type Locality. — Columbia River; according to Bailey (North 



Amer. Fauna, No. 17, p. 46, June 6, 1900), near mouth of 



Willamette, on or near Wappatoo (or Sauvie) Island. 

 Range. — Low country west of the Cascades, from Port Moody, 



British Columbia, south to the Willamette Valley and to 



Yaquina Bay, Oregon, in transition zone. 



*Microtus tetramerus (Rhoads). 



1894. Arvicola (Tetramerodon) tetramerus Rhoads, Proc. Acad. 



Nat. Sci. Philadelphia, p. 283. October 23, 1894. 

 1900. Microtus tetramerus Bailey, North Amer. Fauna, No. 17, 



p. 47. June 6, 1900. 

 Type Locality. — Beacon HiU Park, Victoria, Vancouver Island, 



British Columbia, Canada. 

 Range. — Southern end of Vancouver Island. 



