_Type._--Obtained 6 miles south of Tacoma, Pierce County, Washington, by G. G. Cantwell on December 24, 1918; type in United States National Museum. _Racial characters._--A large, dark form; rich hazel in color with large, black postauricular patches and ochraceous underparts. _Measurements._--Thirteen male and 15 female topotypes average, respectively: total length 224, 196; length of tail 71, 57; hind foot 31, 29; and weight 127, 104 grams. _Distribution._--Restricted to the area about Steilacoom and Tacoma, Pierce County, Washington. =Thomomys talpoides pugetensis= Dalquest and Scheffer _Thomomys talpoides pugetensis_ Dalquest and Scheffer, Proc. Biol. Soc. Washington, 55:96, August 13, 1942. _Type._--Obtained 4 miles south of Olympia, Thurston County, Washington, by W. W. Dalquest, on December 31, 1941; type in United States National Museum. _Racial characters._--Similar to _glacialis_ but underparts not tinged with orange and conspicuous dusky areas present on sides of neck. _Measurements._--Fourteen male and 19 female topotypes average, respectively: total length 223, 205; length of tail 62, 59; hind foot 30, 29; and weight 123, 96 grams. _Distribution._--Known only from the type locality. =Thomomys talpoides tumuli= Dalquest and Scheffer _Thomomys talpoides tumuli_ Dalquest and Scheffer, Proc. Biol. Soc. Washington, 55:96, August 13, 1942. _Type._--Obtained on Rocky Prairie, 7 miles north of Tenino, Thurston County, Washington, by W. W. Dalquest on January 2, 1942; type in United States National Museum. _Racial characters._--Similar to _pugetensis_ but grayer, less yellow. _Measurements._--Eleven male and 14 female topotypes average, respectively: total length 225, 216; length of tail 60, 64; hind foot 31, 30; and weight 140, 118 grams. _Distribution._--Known only from the type locality. =Thomomys talpoides yelmensis= Merriam _Thomomys douglasi yelmensis_ Merriam, Proc. Biol. Soc. Washington, 13:21, January 31, 1899. _Thomomys douglasii yelmensis_ Taylor, Proc. Biol. Soc. Washington, 32:169, September 30, 1919. _Thomomys talpoides yelmensis_ Goldman, Jour. Mamm., 20:235, May 15, 1939. _Type._--Obtained at Tenino, Thurston County, Washington, by C. P. Streator on October 24, 1891; type in United States National Museum. _Racial characters._--A rather small, yellowish race with whitish underparts. _Measurements._--Twenty-one male and 21 female topotypes average, respectively; total length 213, 202; length of tail 64, 61; hind foot 29, 28; and weight 121, 101 grams.