Zapus princeps idahoensis Davis
Preble (N. Amer. Fauna, 15:23, August 8, 1899) referred two specimens from Henry House and three from 15 miles south of Henry House, both localities in Alberta, Canada, to the subspecies Zapus princeps princeps. Subsequently, when Z. p. kootenayensis (Anderson, Nat. Mus. Canada, Ann. Rept. 1931, p. 108, November 24, 1932) and Z. p. idahoensis (Davis, Jour. Mamm., 15(3):221, August 10, 1934) were named, no mention was made of these specimens although the ranges assigned to Z. p. kootenayensis and Z. p. idahoensis seemed to isolate the Henry House area from the remainder of the range (as recorded) of Z. p. princeps. We have examined the pertinent specimens in the U. S. Biological Surveys Collection (75452 and 75453 from Henry House; 81509-81510 from 15 mi. S Henry House). On the basis of paler color, reduced lateral line, smaller skull, shorter palatal bridge and zygomatic arches, they are, among named subspecies, best referred to Zapus princeps idahoensis.