SCIURUS. 



Ill 



FIG. 17. SCIURUS <PARASCIURUSI RUFIVENTER TEXENSIS. 



No. 4739 Field Columbian Mus. Coll. Nat. size. 



rusty; tail above similar to back but more yellowish, beneath uniform 

 cinnamon, darker than belly. The color of ventral surface varies 

 from pure white to deep orange among individuals. 



Measurements. Total length, 532; tail to end of hairs, 280; hind 

 foot, 64.5. Skull: average of two; basal length, 50; palatal length, 

 25.5; interorbital width, 18; zygomatic width, 33.5; length of upper 

 molar series, 10.5. 



F. Otosciurus, Nelson. 



Premolars, ^Ef. Skull short and very broad, with curved superior 

 outline; rostrum rather short, compressed; nasals narrow posteriorly 

 and extending beyond premaxillae; molars heavy. 



