NEW ARIZONA WOOD-RAT. 



159 



JSf. alhiijnlu (No. 1336). 



Achilt with no evident fnlvons color. 

 Young, like adnlt in color, with bellj' 

 almost pure white. 



Throat, chest, median line of belly, 

 and patch between hind legs with 

 hairs pure white to base. 



Posterior process of the intermaxillary 

 extending several millimeters be- 

 hind the nasals. 



Interparietal long and narrow, M'ith 

 an evident angle posteriorly. 



N. mexicana (No. 1308, Hnachnca 

 Mts., Ariz.). 



Adnlt with evident fulvous. 



Young, blue-graj', with belly dark- 

 gray, each hair with short white 

 tip. 



All underparts with the hairs plum- 

 beous at base. (A few specimens 

 have a small patch of han-s en- 

 tirely white on the chest and be- 

 tween the hind legs.) 



Posterior process of intermaxillary 

 extending little if at all beyond 

 the nasals. 



Interparietal short and broad, with- 

 out evident posterior angle. 



