_Marginal records._--BRITISH COLUMBIA: Okanagan; Westbridge; Kuskonook; Cranbrook. MONTANA: Flathead Lake; 6 mi. E Hamilton; Prospect Creek. IDAHO: Cedar Mtn.; New Meadows; Alturas Lake; 10 mi. SE Irwin. WYOMING: 13 mi. N and 2 mi. W Afton; 6 mi. N and 2 mi. E Sage. IDAHO: 1 mi. W Bancroft; Swan Lake. UTAH: Beaver Creek, South Fork, Ogden River; Midway Fish Hatchery; west side Deep Creek Mts., Queen of Sheba Canyon, 8000 ft. NEVADA: Baker Creek (Hall, 1946:120); Reese River (_ibid._); 2 mi. S Hinds Hot Springs (_ibid._). CALIFORNIA: Mono Lake (Jackson, 1928:110); near Mammoth; Alvord; Mount Conness; Donner; Buck Ranch (Jackson, 1928:110); Warner Creek, Drake Hot Springs (_ibid._); Canyon Creek; Cuddeback (Jackson, 1928:105); Novato Point (_ibid._), thence northward along the coast to WASHINGTON: Friday Harbor, San Juan Island. BRITISH COLUMBIA: Port Moody. =Sorex vagrans obscuroides= new subspecies _Type._--First year female, skin and skull; No. 30064/42074, U. S. Biol. Surv. Coll.; obtained on August 9, 1891, by Frank Stephens from Bishop Creek, 6600 ft., Inyo Co., California, original no. 811. _Range._--The Sierra Nevada of California, north at least to El Dorado County, intergrading northerly with _S. v. vagrans_. _Diagnosis._--Size medium for the species; average and extreme measurements of 5 topotypes are: total length, 107 (103-112); tail, 47 (45-50); hind foot, 12.8 (12-13.5). Skull relatively broad interorbitally; color of dorsum in summer pelage nearest (17'''_k_) Olive Brown. _Comparisons._--Differs from _S. v. vagrans_, with which it intergrades to the north, in: longer tail and total length; skull larger and relatively broader interorbitally; color in summer grayer (less reddish), the lighter subterminal color bands of the hair often showing through the darker tips and imparting a grizzled appearance to the dorsum. Differs from _S. v. parvidens_ to the south in: skull relatively broader interorbitally and less flattened; teeth slightly larger. _Remarks._--_S. v. obscuroides_ has long been called _S. v. obscurus_. In fact, _obscuroides_ is separated from the range of _obscurus_ by the intervening, smaller subspecies _S. v. vagrans_. _S. v. obscuroides_ resembles _S. v. obscurus_ in color and size but the skull is smaller, although relatively slightly broader. The resemblance in color is possibly due to the fact that _obscuroides_, like _obscurus_, is a high mountain form. _S. v. obscuroides_ intergrades with _S. v. vagrans_ along the crest of the Sierra between Yosemite National Park and Lassen Peak and on the eastern slope of the Sierra from approximately Mammoth northward. Specimens from Donner are intergrades but are closest to _S. v. vagrans_. Although all specimens from Lassen Peak are referable to _S. v. vagrans_, some show cranial characters of _obscuroides_.