WB Davis 1935. Elba, Cassia Co., Idaho. June 12, of which were young and were not collected. They were living in the rock slides chiefly, but on the top of the ridge between Conner Canyon and Elba I found them occupying burrows in the open ground in the vicinity of flat shale-like rocks. In Conner Canyon I collected one Citellus armatus, but I am sure I saw an oregonicus. These two, I believe are distinct species and, I believe, are occupying the same ecological niche in this zone of overlap near Albion. There is still considerable snow_ on the ground in protected areas. Near one of these I "jumped" a Snow-shoe Rabbit - Lepus townsendii - and it went jumping away over the snow in a manner much like that of a deer. She was collected and contained 8 embryos which were nearly ready to be born. The eyes were open - of the embryos - and there was a considerable growth of fur. One was made up into a study skin. There were numerous House Mice