Sorex vagrans isolatus Jackson
Sorex obscurus isolatus Jackson, Jour. Washington Acad. Sci., 12:263, June 14, 1922.
Type.—Adult male, skin and skull; No. 177719, U. S. Biol. Surv. Coll.; obtained on May 21, 1911, by Alexander Wetmore from mouth of Millstone Creek, Nanaimo, Vancouver Island, British Columbia.
Range.—Vancouver Island.
Diagnosis.—Size medium; measurements of two from the type locality are: total length, 113, 118; tail, 48, 49; hind foot, 14, 14. Dark in summer and winter, underparts brownish.
Comparisons.—Smaller than S. v. setosus but color much the same; resembles S. v. obscurus in size and cranial characters but darker in all pelages; similar in color to S. v. vancouverensis with which isolatus is sympatric but with longer tail, longer hind feet, broader rostrum and larger teeth. For comparison with S. v. mixtus see account of that subspecies.
Remarks.—S. v. isolatus and S. v. vancouverensis seemingly approach one another morphologically more closely than do any other pair of sympatric subspecies of Sorex vagrans. The exceptions may be S. v. vagrans and S. v. obscurus which are geographically sympatric in a few places although they may be ecologically separated.
Specimens examined.—Total number, 9. British Columbia, Vancouver Island: Nanaimo, 3 BS; Barclay Sound, 1 AMNH; Goldstream, 5 BS.
Marginal Records.—British Columbia, Vancouver Island. (Anderson, 1947:19): Cape Scott; Victoria.
Sorex vagrans insularis Cowan