644 



PATAGONIAN EXPEDITIONS: ZOOLOGY. 



with seal-brown, the under neck immaculate ; the nape and sides of the 

 neck deep seal-brown ; all the feathers margined and bordered with deep 

 buff. 



FIG. 327. 



Buteo erythronotus. Immature, P. U. O. C. 7864. About one-fourth natural size. 



Back : Interscapular region, back and upper tail-coverts deep seal-brown, 

 the feathers margined, tipped and mottled with deep buff. 



Tail : Ashy grey above ; crossed by fifteen or more ashy brown bars 

 (one-fourth inch wide) and with a subterminal bar of double width ; tipped 

 broadly with buffy brown. From below, the tail is ashy white, with obso- 

 lete barring of dull slate, the terminal band much as from above and the 

 subterminal bar more than double the width of any of the others and the 

 same in color. 



Wings: Primaries and primary coverts deep seal-brown, more or less 



