University of California Publications in Zoology [Vol- 12 



Necfoma desertorum 



Perognathus mtermedius 

 r\mrnospermophi/us hams 



Dipodomys 



Perognathus penicillatus 

 Peromyscus eremicus 

 SytnJagus amonae 



Peromyscus sonor/ensis 

 'Neotoma venusta 



Peromyscus sonoriensis 

 Neotoma venusta 



if Peromyscus eremicus 

 Sylvitagus arizonae 



Perognathus penicillatus 

 Dipodomys merriami 



Am rrrospermophitt 

 Perognathus spinatus 

 Perognathus formosus 

 Neofoma desertorum 

 Peromyscus stephem 





