Bull. 1091, U. S. Dept. of Agriculture. 



PLATE VII. 



Fig. I. — Den Excavated on Range Reserve. 



Vertical section tlirough Den No. 1, of Table 1 (p. 20), showing the complex system of bur- 

 rows, some of them plugged with closely packed storage (outlined in white), the depth of the 

 den .and the widened chambers centrally located. 



4 





^ 





* '^K^^KBSBl^^B^^ 



Fig. 2. — Content of Excavated Den. 



■torage content of Den No. 1 (Fig. 1, above), showing the separate species of plants listed in 

 Table 1. The rod is 1 meter long. The large pile on the left is composed of seed-laden 

 heads of crowfoot grama (Bouteloua rothrockii), the large pile on the right consists of heads of 

 six-weeks grama (Bouteloua aristidoides), the pile of heads in the center is desert plantain 

 (Plavtago ignota), and the smallest heap is composed of buckwheat-bush seeds {Eriogonum 

 polydadon). 





It 



