Sorex obscurus insularis Cowan, Proc. Biol. Soc. Washington, 54:103, July 31, 1941.
Type.—Adult female, skin and skull; No. 3110, Prov. Mus. British Columbia; obtained on August 24, 1938, by T. T. and E. B. McCabe from Smythe Island, Bardswell Group, British Columbia.
Range.—Smythe, Townsend, and Reginald islands, British Columbia.
Diagnosis.—Size medium; average and extreme measurements of 50 specimens from within the range of the subspecies are: total length, 122.3 (111-134); tail 52.6 (46-58); hind foot, 14.6 (13-15) (Cowan, 1941:107).
Comparisons.—Smaller externally and cranially than S. v. longicauda and brown instead of blackish or grayish in winter pelage. Skull broader than that of S. v. calvertensis and color brown rather than blackish or grayish in winter pelage.
Remarks.—S. v. insularis occurs together with S. cinereus on Townsend and Smythe islands. S. vagrans far outnumbered the cinereus shrew (Cowan, 1941:96).
Records of occurrence.—British Columbia (Cowan, 1941:104): Smythe Island, Townsend Island, Reginald Island.
Sorex vagrans calvertensis Cowan
Sorex obscurus calvertensis Cowan, Proc. Biol. Soc. Washington, 54:103, July 31, 1941.
Type.—Adult male, skin and skull; No. 1947, Prov. Mus. British Columbia; obtained on July 14, 1937, by T. T. and E. T. McCabe from Safety Cove, Calvert Island, British Columbia.