122 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
1885. Armcola tovinseyidi Tkue, Proc. U. S. nat. mus., vii 
(1884), p. 597. 1885. (Part.) 
1896. 31\i,crotus\ towmendl Miller, North Amer. fauna, no. 
12, p. 66. July 22, 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. 
Microtus tetramerus (Rhoads). 
1894. Armcola {Tetrcimerodon) tetramerus Rhoads, Proc. 
acad. nat. sci. Phila., p. 283. October 23, 1894. 
1900. 3ficrotus tetramerus Bailey^, North Amer. fauna, no. 
17, p. 47. June 6, 1900. 
Type locality\ — Beacon Hill Park, Victoria, Vancouver 
Island, British Columbia, Canada. 
Microtus longicaudus (Merriam). 
1888. Armcola [3Iy)iomes) longicaudus Merriam, Amer. 
nat., XXII, p. 934. October, 1888. 
1895. 3Iicrotus {3Ignomes) longicaudus Allen, Bull. Amer. 
mus. nat. hist., vii, p. 266. August 21, 1895. 
Ty^pe localityl — Custer, Black Hills, Custer County,-South 
Dakota. Altitude, 5500 feet. 
Microtus mordax (Merriam). 
1891. Armcola {^3IyRomes') mordax Merriam, North Amer. 
fauna, no. 5, p. 61. July 30, 1891. 
1897. \3Iicrotus] mordax Trouessart, Catal. mamm., pt. iii, 
p. 564. 
Type localityv — Sawtooth (or Alturas) Lake, east base of 
Sawtooth Mountains, Idaho. Altitude, 7200 feet. 
Microtus macrurus Merriam. 
1898. 3Licrotus macrurus Merriam, Proc. acad. nat. sci. 
Phila., p. 353. October 4, 1898. 
Type locality. — Lake Cushman, Olympic Mountains, Wash- 
in oton. 
O 
Microtus angusticeps Bailey. 
1898. 3Iicrotus angusticeps Bailey", Proc. biol. soc. Wash¬ 
ington, XII, p. 86. April 30, 1898. 
Type locality. — Crescent City, Del Norte County, Califor¬ 
nia. 
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