630 PATAGONIAN EXPEDITIONS I ZOOLOGY. 



eral color reddish brown, cinnamon and white or buff. The feathers of 

 the crown and back of the head white, with their lanceolate tips deep seal- 

 brown, not wholly concealing the underlying color ; sides of the face and 

 a more or less distinct line back of the eye buffy white, the former 

 streaked with deep seal-brown ; the back and upper surface in general a 

 mixture of deep seal-brown, the feathers edged and marked irregularly 

 with rusty reddish, and on the upper tail-coverts vermiculated on the outer 

 webs with cinnamon-brown ; the lesser and median coverts similar to the 

 rest of the upper surface, the greater series seal-brown, with ashy barring 

 on the outer webs and vermiculation of white and buff and ashy grey on 

 the inner webs ; the quills much as in the adult ; the tail above deep ashy 

 grey, with vermiculation and obscure barring in dull seal-brown; seen 

 from below, the tail is dull seal-brown, heavily marked and vermiculated 

 with ashy white and grey ; the breast and throat are strongly cinnamon 

 with heavy deep seal-brown arrow-shaped markings ; the abdomen is deep 

 seal-brown, with buffy marks and barring more or less distinct ; the thighs 

 are barred about evenly deep seal-brown and bright cinnamon ; the under 

 tail-coverts are barred evenly deep seal, pale cinnamon and white ; they 

 are relatively shorter than in the adult. 



Geographical Range. Chili, Tierra del Fuego, the whole of Patagonia, 

 and the eastern part of Brazil and northern South America to Colombia. 



This is one of the conspicuous birds of the Patagonian region and is 

 commonly known as the eagle ; it was noted by the naturalists of Princeton 

 at various points in southern Patagonia, near to and away from the coast, 

 and both the old and immature plumages of the bird are represented in 

 the collections made by Mr. Hatcher. These birds, together with speci- 

 mens from Chubut, from the Museo de La Plata, form the basis of the 

 present descriptions, to which the series of birds in the British Museum 

 of Natural History have also contributed. 



The birds do not appear to be migratory at any point in their range 

 and have been secured at the Straits of Magellan or in the vicinity at all 

 seasons of the year. In the Chupat Valley they breed in November and 

 December. Doering says they breed upon the banks of the Rio Negro 

 upon the ground, but on some elevated place ; Barrows thought the birds 

 he became acquainted with bred on cliffs in the hills of northern Argen- 

 tina, but did not absolutely see the nest. 



In Uruguay, Aplin refers to it as follows (Ibis, 1894, pp. 194-195): 



