642 



PATAGONIAN EXPEDITIONS! ZOOLOGY. 



Wings : Primaries dull seal-brown at their extremities, barred at inter- 

 vals with broad bars of deeper seal ; the exposed outer webs washed with 

 slaty; the inner webs white, almost immaculate; secondaries pale ashy 

 brown on their exposed surfaces, barred with deep seal-brown and washed 



FIG. 326. 



Buteo erythronotus. Immature male. P. U. O. C. 7870. About one-fourth natural size. 



with slaty ; they are broadly tipped with white and the inner webs are 

 like the outer at the tip end but soon become pure white, clearly barred 

 with deep seal-brown ; the scapulars rusty like the back and marked and 

 spotted with deep seal-brown ; the coverts deep seal-brown, margined 

 with rusty red and some of the median series slaty, with deep seal barring 



