MILLER AND REHN: NORTH AMERICAN MAMMALS. 145 
* Thomomys clusius Cones. 
1875. Thomomys clusius Coues, Proc. acad. nat. sci. Phila., 
p. 138. June 15, 1875. 
1885. Thomomys clusius True, Proc. U. S. nat. mus., vii 
(1884), p. 598. 1885. 
Type locality. — Bridger Pass, Sweetwater County, Wyo¬ 
ming. 
Thomomys clusius fuscus Merriam. 
1891. Thomomys clusius fuscus Merriam, North Amer. 
fauna, no. 5, p. 70. July 30, 1891. 
Type locality. — Mountains at head of Big Lost River, 
Custer County, Idaho. 
%/ * 
Regarded by Allen (Bull. Amer. mus. nat. hist., v, p. 63, April 
28, 1893) as a form of T. douglasii. 
Thomomys douglasii (Richardson)'. 
1829. Geomys douglasii Richardsox, Fauna Boreali-Ameri¬ 
cana, I, p. 200. 
1893. Thomomys douglasii Allex, Bull. Amer. mus. nat. 
hist., V, p. 66. April 28, 1893. 
Type locality. —Near the mouth of the Columbia River, 
Oregon. 
Thomomys douglasii yelmensis Merriam. 
1899. Thomomys douglasi yelmensis Merriam, Proc. biol. 
soc. Washington, xiii, p. 21. January 31, 1899. 
Type locality. — Tenino, Yelm Prairie, Thurston County, 
W ashiiigton. 
Thomomys fossor Allen. 
1893. Thomomys fossor Allen, Bull. Amer. mus. nat. hist., 
V, p. 51. April 28, 1893. 
Type locality. — Florida, La Plata County, Colorado. Alti¬ 
tude, 7200 feet. 
Thomomys fulvus (Woodhouse). 
1852. Geomys fulvus Woodhouse, Proc. acad. nat. sci. Phila., 
VI, p. 201. 
1857. Thomomys fulcus Baird, Mamm. N. Amer., p. 402. 
1890. Thomomys fulcus Merriam, North Amer. fauna, no. 3, 
p. 71. September 11, 1890. 
