Wm B. Richardson 1936 General Account of grass and herbaceous plants. Toward the outer edge of the stream bottom the willows grow in thickets with inter- vening grass or meadow land. About the meadow there is an open coniferous forest which is made up principally of Lodgepole Pine. The open area in this forest is given over to a rather dense brushy growth of Chinkapin, Bay Laurel, Ceanothus, etc. Rising above the zone of vegetation is the barren slopes of the Great Western Divide. Soil - A coarse silty soil with many fragments of shale and slate and other fragment material. Fifteen graph traps and 100 mouse traps were set this evening July 15 My catch consisted of 4 Thomomys bottae, 2 Zapus pacificus, 1 Sorex, 17 Peromyscus maniculatus, 21 Microtus mordax. Skinned all day. Evening catch - 64 Microtus mordax, July 16 Catch consisted of 3 Thomomys 2 Zapus pacificus, 23 Peromyscus 6 Microtus mordax