Oct 1931 North end of Indian Springs Valley, 27 3020 ft., June 3, 1931 four miles wide at the point where we camped (see Las Vegas sec. U.S. Geol. Surv.). About 1/4 of a mile from the road there arises a series of small hills very near the center of the valley. Upon the sloping base (west) of these hills sand has drifted up. Set out 62 traps from the point where the machine was parked (beginning to get sandy, with small rocks upon the surface and a certain amount of low vegetation scattered about) up to the bare sandy area. On the trip I noted 2 Phanopeplas, a number of Mocking Birds, and several Cnemidophorus. June 4, 1931 This A.M. traps 1 Perognathus parvus, 5 Dipodomys merriami, 4 Dipodomys deserti. The latter were trapped where the sand was deep. Their mounds were generally located around a bush. The tracks were numerous in the morning sand, and many of the burrow entrances were open. The Dipodomys merriami were not trapped in the very sandy area as was the case with deserti. The holes were very much smaller. Many of the tunnels of both species were within a few inches