W.B. Davis 1935. 473a, Mammals examined from the Chas. R. Cowan museum taken in Idaho. no skull 504 ♂ Zapus p. rootenayensis 216-12 7-30-17. taken at Cedar Mt., July 2, 1898 by Stanley E. Piper). This specimen has been identified by R.M. Anderson as Z. p. oregonus. I have compared the skin with typical oregonus and find the dorsal coloration not so dark, as it compares favorably with Z. p. idahoensis and should, perhaps, be considered as such. There is no skull. However, on geographic grounds it is here assigned to rootenayensis