PLATE 11 



Fig. 16. Group of burrows of the large kangaroo rat (Dipodomys deserti). 

 Tracks of the animals may be seen in the soft aeolian sand, here accumulated 

 to considerable depth. The dessicated remains of a brief-lived annual vegeta- 

 tion may be seen on the sand between the creosote and the salt-bushes. Other 

 species of mammals trapped in this, a variation of the salt-bush association, 

 were: Citellus tereticaudus, Peromyscus eremicus, and Perognathus penicillatus. 

 Photograph taken about one mile north of Mellen, Arizona, February 27, 1910. 



Fig. 17. Mouth of burrow of the large kangaroo rat {Dipodomys deserti), 

 showing parallel imprints of the hiud feet and the tail in the soft sand. Photo- 

 graph taken above Mellen, Arizona, February 27, 1910. 



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