Dipodomys spectabilis 1938, E. W. Nelson and others. April 25, 1938 Four (0-230, 522-634) taken at dawn One specimen was found in a burrow, the other three were active on the surface. This constitutes an interesting record of the occurrence of this species in Sonora (Chiricahua Mountains). May 12, 1938 Two specimens were captured at night. June 10, 1938 One specimen was found in a burrow. The other two were active on the surface. July 15, 1938 Three specimens were found in a burrow. One of these was taken at night, and the other two were active on the surface. August 20, 1938 One specimen was found in a burrow. The other two were active on the surface.