ILLUSTRATIONS. 



PLATES. 



Page. 



Plate I. Striped Spermophile (Spermophilm tridecemlineatus) Frontispiece. 



II. Franklin's Spermopliile (Spermophilus frankiini) 48 



III. Richardson's Spermopliile (Spermophilus riehardsoni) 58 



MAPS. 



Map 1. Distribution of thft Striped Spermophile (Spermophilus tridecemlineatus). 

 2. Distribution of Franklin's Spermophile (Spermophilus franMtni). 

 sS. Distribution of Kennicott's Spermophile (Spermophilus spilosoma ob- 



soletus) and the Mexican Spermophile (Spermophilus mexicanus). 

 4. Distribution of Richardson's Spermophile (Sjyermophilus riehardsoni) 

 and the Wyoming Spermophile (Spermophilus riehardsoni elegans). 



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