ars ae Pa aS ES 1924] Swarth: Birds and Mammals of the Skeena River Region 383 the five black skins, the four taken in May are black throughout save for a more brownish appearance upon the head. The September skin has an infusion of chestnut on neck and shoulders, and scattered white hairs elsewhere. We had slight opportunity of observing the habits of this wood- chuck, but we were told that the preferred habitat was in clearings, such as were afforded by abandoned ranehes.