University of California Publications in Zoology [Vol.12 





NecibmB deserhrun 



Perognathus ir/ermediu 

 Ammospermopht/us nor 



D/Pochmys 



P^rognafhus penieillafus 

 Perpmyscus eremicus 

 3y/k'//ag'us anzonae 



PeromyL 



Neotoma venusTa 



sonor/ens/s 



^P^rofnyscus sonor/ensis 

 Neofoma ^enusta 



1 Reromyscus 

 \3y/i'//agt/s Br 



erem/cus 



• F^ro^namus pen/c///a/us 

 Dipodomys rnerr/smi 



Ammospermophilus U 

 Perognafhus sp/natus 

 Pefognafhus formosus 

 Necmma deserforum 

 Peromyscus Stephens 



