1890.] NATURAL SCIENCES OF PHILADELPHIA. 17 



The hack is brown with black at basal fourth. The hair of this 

 tract where it extends on the wing-nienibraue, is silvery-yellow. The 

 same color characterizes the hair of the extremities. 



Endopatagial hairs are conspicuous on the margin of both dorsal 

 and ventral surfaces. 



(2) An Adult. 



The hair as above with the exception that the color on the side of 

 neck, side of trunk, back and front of neck, and of chest and abdo- 

 men is brown instead of black. 



Pteropus rubricollis. 



Three adult skins. 



(1) In no region is the hair differently colored at shaft and base. 



The crown, nape and whisker with long, erect, unicolored gray hair. 



The anterior portion of the crown advanced beyond the eyes well 

 on the nose. 



The cheek covered with hair of the same character which is con- 

 tinuous with the above. The ear is covered with hair on both sides. 



Cireum-palpebral patch black or gray. 



Labial hairs well developed, black. 



Post-mental patch large, black and continuous with the hair of the 

 front of the neck. 



Side of neck, which has a distinctly ventral inclination, is cov- 

 ered with very long silky, hair of a tawny yellow — the tips being 

 chestnut-brown. The patch does not extend to the shoulder nor 

 scarcely to the back and front of neck, where the hair is more brown. 



The shoulder and base of prebrachium is occupied with an equal- 

 ly long patch of black hair which is continuous with the fide of the 

 trunk. This line closely resembles that seen in P. vulgaris in hav- 

 ing the hairs with ashy tips. 



The chest and abdomen of the same general color as the sides of 

 trunk but more gray. 



The hair of the wing-membranes brownish, with gray tips. 



The back is covered with long, black, silky hair with ashy tips 

 The tract advances well up on the neck, and the color of the side 

 of the neck dominates scarcely at all the color of the dorsum or ven- 

 tre. The expansion of the hair on the wing-membranes at the en- 

 dopatagium is of the same color as the back of the trunk, thus pre- 

 senting a marked contrast with the disposition in P. vulgaris, or is of a 

 dull iron-gray. Gray hair covers the humerus and the fleshy part 



