Throughout most of the Great Basin and Columbian Plateau _Sorex vagrans_ is, with the exception of the rare _S. merriami_ and _S. preblei_, the only small shrew. In the Cascades and in the coastal lowlands it is the only small shrew except for _S. cinereus_ and _S. trigonirostris_, both extremely rare and local in this region. _S. vagrans_ seemingly competes to a certain extent with the larger _S. trowbridgii_ in western Washington and seems to be partially dominant to _trowbridgii_, at least in marshy habitats (Dalquest, 1941:171). _Specimens examined._--Total number, 1197. BRITISH COLUMBIA: _Osoyoos District_: Okanagan, 20 PMBC; Okanagan Landing, 2 PMBC; Nahun Plateau, 2 PMBC. _Vancouver District_: Vancouver, 2 PMBC. _New Westminister District_: Port Moody, 16 BS; Westminster Jct., 4 AMNH; Langley, 1 BS; Vedder Crossing, 1 PMBC; Huntingdon, 69 NMC; Sumas, 16 BS; Cultus Lake, 1 NMC. _Similkameen District_: Princeton, 6 Mile Creek, 1 NMC. Hedley, Stirling Creek, 7 NMC; Fairview-Keremeos Summit, 5 NMC; Oliver, 1 NMC; Westbridge, 6 NMC; Osoyoos, 1 PMBC; Osoyoos-Bridesville Summit, 4 NMC; Cascade, 7 NMC. _Nelson District_: Kuskonook, 1 PMBC; Rossland, 14 NMC; Trail, 2 NMC; Creston, 4 PMBC, 4 NMC; near Creston, 7 NMC. _Cranbrook District_: Cranbrook, 5 BS; Yahk, 2 NMC; Yahk Camp 6, 2 NMC; Goatfell, 2 NMC. _Fernie District_: Newgate, 3 NMC. WASHINGTON: _Whatcom Co._: Blaine, 1 BS; Beaver Creek, 5 WSC; Glacier, 1 BS; Mt. Baker Lodge, 1 WSC; Lake Whatcom, 1 BS; Barron, 2 BS. _Okanogan Co._: Sheep Mtn., 3 BS; E. end Bauerman Ridge, 1 BS; Oroville, 1 BS; Hidden Lakes, 1 BS; Loomis, 1 BS; Conconully, 1 BS; Twisp, 1 BS. _Ferry Co._: 5 mi. W Curlew, 2 BS. _Stevens Co._: Marcus, 1 BS. _Pend Oreille Co._: Canyon, 1 WSC; Metaline, 2 BS; Sullivan Lake, 1 BS. _San Juan Co._: East Sound, Orcas Island, 3 BS; Friday Harbor, San Juan Island, 1 BS; San Juan Park, 2 WSC; Blakely Island, 1 KU; Richardson, 6 BS. _Skagit Co._: Cypress Island, 1 KU; Hamilton, 1 BS; Sauk, 1 BS; Avon, 3 BS; Mt. Vernon, 2 BS; La Conner, 5 BS. _Island Co._: San de Fuca, Whidby Island, 3 BS; Greenbank, Whidby Island, 2 BS; 3 mi. N Clinton, Whidby Island, 1 BS. _Snohomish Co._: Oso, 2 BS; Hermosa Point, Tulalip Indian Reservation, 7 mi. W and 1/2 mi. N Marysville, 3 KU. _Chelan Co._: Entiat, 2 BS. _Lincoln Co._: 6 mi. E Odessa, 4 BS. _Spokane Co._: Marshall, 7 BS. _Clallam Co._: Neah Bay, 29 BS; 8 mi. W Sekin River, 1 WSC; mouth Sekin River, 1 WSC; Dungeness, 1 BS; Port Townsend, 3 BS; Ozette Indian Reservation, 1 CMNH; Sequim, 4 BS; Tivoli Island, Ozette Lake, 1 CMNH; Garden Island, Ozette Lake, 3 CMNH; Elwah, 1 WSC; Blyn, 1 BS; Soleduck River, 1 BS; 12 mi. S Port Angeles, 1 WSC; Forks, 9 CMNH, 1 BS; Cat Creek, 1 WSC; Lapush, 5 BS. _Jefferson Co._: Jefferson Ranger Station, N Fork Hoh River, 5 CMNH; Duckabush, 6 BS. _Kitsap Co._: Vashon Island, 2 BS. _King Co._: Redmont, 2 BS; Kirkland, 20 BS; Seattle, 1 WSC, 3 KU; Northbend, 2 BS: Lake Washington, near Renton, 2 BS; Kent, 1 BS;