Arr 1931 Panich P. O. 5900 ft., Nye Co., Nevada. 70th Sept. 25, 1931 Trails were numerous. Hall's trap line set in a straight line due south contained 6 light colored Microdiplops. One trap set in sand for a Dipodomy was covered with sand. We took the sand off the trap and upon ret- urning a few minutes later found it covered again. We sat a few feet away in the moonlight and waited to see if we could catch sight of the animal. Hall saw him come out, give a flip of his tail and go back into his bur- row. I failed to get a glimpse of him from where I sat. After a few minutes more of waiting we started to dig in the sandy soil. Beneath the surface the ground became harder, being composed of finer sand mixed with silt. The burrow divided a number of times within three feet of the entrance but all these offshoots turned out to be blind pockets ending 8 or 10 inches from the main run. The