Arizona 

 Exp. Sta. 



LIFE HISTORY OF THE KAISTGAROO EAT. 



31 



storage. The chaff refuse from the food probably contributes largely 

 to it, though some leaves of grasses not stored for food may also 

 be found, and a nest, especially the one in use, may be distinguished, 

 if excavating is carefully done, by the distinct cavity about the size 



main de/7 



KiG. o. — Diagram of tlie system of surface runways and subsidiary dens of Dipodomys 

 spectaMlis spectabilis. Tlie underground tunnels of the main den were too complicated 

 to illustrate on this scale, being very similar to those of Figure 2. The underground 

 tunnels of the subsidiaries are shown in solid black. Some runways fade out in the 

 grass in a manner that can not be indicated in a line drawing. 



