Canti, blain 1973 Dipodomys microps July 21 10 mi. W Wolf Hole, 3900'. Mohave Co. Arizona in quantity. The only leafy material stored was several small caches of leaves or seed parts, thin and flat. O, light colored, with small orange seeds in pericarpiment. The ground was very powdery, and accurate measurements of quantity for caches couldn't be made within the time available. I baited many traps with a job of peanut butter, but the animals seem not to be attracted to it. July 22 W. slope Beaverdam Mts., 3800 Washington Co. Utah. In an area of Joshua tree, creosote, mescuita, and blackbrush, I took 3 animals. As yesterday at Wolf's Hole, these was found in complexes of burrow entrances; 1 to 2 dozen to a complex, and located on a low, wide mound under a bush. One was near creosote, the other had some dry, twiggy brush under it. Microps seems only to occur in association with these burrow complexes; grub type trapping is not effective. I excavated a burrow system and found two very large