490 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



Tarsus, 2.25. 



The adult female bird averages somewhat smaller than the male. 



Color. — (Male cited.) General color: Slaty gray, with white wing-bars 

 and abdomen. 



Head : Pale gray ; darker on the crown and a deeper shade from the 

 base of the bill to back of the eye ; upper and lower eyelid white, which is 

 prolonged into a stripe curving slightly downward and extending almost to 

 the occiput, where it gradually narrows to a point and is lost ; this mark- 

 ing is definite and in no way obscure or obsolete ; sides of the head and 

 face slaty gray, paler than on the crown. 



Fig. 247. 



--^* 



Tachyeres cinereus. P. U. O. C. 8847. Adult male. Rio Negro, Patagonia, February, 1898. 

 Profile of head and neck. Reduced. 



Neck : Pale slaty gray like the sides of the head and terminating defi- 

 nitely and abruptly in the darker color of the chest and back ; there is an 

 area on the throat, beginning back of the chin on the upper throat and 

 extending half way to the chest, of reddish cinnamon-brown ; it is definite 

 and clearly outlined. 



Back : Mantle dark slate-gray, each feather with a darker subapical 

 band, giving the scaled appearance ; lower back, rump and upper tail- 

 coverts dark slate-gray, without the markings on the mantle ; the upper 

 tail-coverts shaded slightly with olive. 



