Palmer 1934 July 12 Caught mammals of the following species: 24 Peromyscus maniculatus, 2 Perognathus parvus, 1 Eutamias minimus. I also shot a Sage Thrasher and observed Brewer Sparrows, Mountain Bluebirds, Green-tailed Towhees and one Rock-Wren. Set 60 gov-sized mouse traps. 45 were set across a low sandy hill with Artemisia and then down to a small canyon W of Camp. This place had a small stream 1-1/2 ft. across and was grassy with a rather dense growth of Willows. Here I set 15 traps in Microtus runways in the grass along by the water. I also set 5 rat traps in the rocks farther up the hill. July 13 Caught mammals of the following species: 12 Peromyscus maniculatus, 2 Perognath- us parvus, 1 Eutamias minimus. All were caught in the Artemisia with the exception of one Peromyscus which was taken in a rat trap in a rock-outcrop. Left the 15 traps set in Microtus run- ways. At noon visited these traps again and found one Calospermophilus lateralis and one very small Microtus montanus in the traps. I reset the