306 PATAGONIAN EXPEDITIONS : ZOOLOGY 



Color. — Adult male (breeding). General color above blackish brown, 

 with creamy edges and rufous notches and spots to each feather. Below 

 pale creamy white on the chin, shading into deep rufous chestnut on the 

 throat and rest of the lower parts. The neck streaked and the rest of the 

 under parts obscurely barred with blackish brown. 



Head : Crown ashy brown, with a rufous wash and each feather with 

 a median region of deep brown. An obsolete eyebrow of creamy white, 

 striped with fine brown lines. Loral region dusky. Sides of face creamy 

 white with a rufescent tinge. A distinct white area or spot in front of the 

 eye, and extending below it. 



Neck: Upper surface similar to back; sides creamy white with a rufes- 

 cent tinge; chin whitish with a rufous shading and lined with fine spots 

 of blackish brown ; lower throat deep rufous chestnut, lined or streaked 

 with deep blackish brown. 



Back: Blackish brown, each feather marked and notched with pale 

 rufous. The lower back and rump are deeper in tone and the feathers are 

 narrowly fringed with creamy. Upper tail coverts black terminally and 

 crossed basally by a broad band of white, forming a white rump spot. 

 The longer upper tail coverts with the black predominating. 



Tail : Black with broad white bases and narrow white tips to the 

 feathers. 



Wings : Coverts brown, showing much less rufous than the back ; the 

 greater series edged with white at the ends of the feathers. The inner 

 greater coverts notched with rufous like the inner secondaries. Bastard 

 wing and primary coverts black, the coverts tipped with white forming 

 together a white spot. Primaries and all but the innermost secondaries 

 blackish, with white shafts, which show almost to the ends of each feather. 



Under parts : Chin creamy or rufescent white, shading into deep rufous 

 chestnut on the lower throat. This color prevails over the entire under 

 surface, being streaked on the throat and neck and barred on the breast, 

 chest and abdomen with dusky or blackish. Under tail coverts broadly 

 barred rufous chestnut and blackish, tipped with white. Axillaries blackish. 

 Under wing coverts dusky slate, the outer ones with broad white edging. 



Bill, "greyish yellow, dark brown along the ridge of the upper man- 

 dible, and blackish toward the tips of both" (J. J. Audubon). 



Feet, "light grayish blue " (J. J. Audubon). 



" Iris dark hazel brown. 



"Male. La Plata, Buenos Aires, Arg. Rep., Nov. lo, 1882. 



