118 PKOCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Microtus aztecus (Allen). 
1893. Arvicola (^Mynomes) Allen, Bull. Amer. mus. 
nat. hist., v, p. 73. April 28, 1893. 
1897. \_3Iicrotus'] aztecus Trouessart, Catal. mamm., pt. iii, 
p. 562. 
Type locality. — Aztec, San Juan County, 'New Mexico. 
Altitude, 5900 feet. 
Microtus enixus Bangs. 
1896. Microtus enixus Bangs, Amer. nat., xxx, p. 1051. 
December 5, 1896. 
Type locality. — Hamilton Inlet, Labrador. 
Microtus terraenovae (Bangs). 
1894. Arvicola terraenovae Bangs, Proc. biol. soc. Washing¬ 
ton, IX, p. 129. July 27, 1894. 
1896. 3I[icrotus'\ terraeno‘vae Miller, North Amer. fauna, 
no. 12, p. 66. July 23, 1896. 
Type locality. — Codroy, Newfoundland. 
Microtus breweri (Baird). 
1857. Arvicola hreweri Baird, Mamm. N. Amer., p. 525. 
1896. Microtus hreweri Miller, Proc. Boston soc. nat. hist., 
XXVII, p. 83. .June, 1896. 
Type locality. — Muskeget Island, off Nantucket, Massachu¬ 
setts. 
( 
Microtus nesophilus Bailey. 
1898. Microtus insidaris Bailey, Proc. biol. soc. Washington, 
XII, p. 86. April 30, 1897 (not of Nilsson). 
1898. 3Iicrotus nesophilus Bailey, Science, n. s., viii, p. 783. 
December 2, 1898. 
Type locality. — Great Gull Island, off eastern extremity of 
Long Island, Suffolk County, New York. 
Microtus montanus (Peale). ^ 
1848. Arvicola rnontana Peale, U. S. explor. exp., viii, 
mamm. and ornith., p. 44. 
1897. [Microtus~\ 'montanus Trouessart, Catal. mamm., pt. 
Ill, p. 563. 
Type locality.— Headwaters of the Sacramento River, near 
Mount Shasta, Siskiyou County, California. 
