686 



PATAGONIAN EXPEDITIONS I ZOOLOGY. 



bottom anteriorly as it approaches the base of the bill ; lores and feathers 

 in front of eye nearly or quite white ; top of head dull seal-brown, the 

 feathers tipped, margined and partially barred with white and buffy white, 

 the whole crown having a barred pattern ; ear-tufts black, with broad 

 anterior margins to the feathers, white or buffy white. 



FIG. 350. 



Bubo magellanicus. P. U. O. C. 7949. Natural size. Details of facial disk, ear, bill and eye. 



Neck : Above much like the crown of head ; the sides lighter, the 

 feathers dull isabelline, barred and with narrow median streaks of dusky ; 

 the throat pure silvery white, defined anteriorly by the ruff of the facial disks 

 and posteriorly by a more or less distinct dusky band nearly an inch 

 wide in some birds, but more frequently not more than a third of an inch. 



Back : Interscapular region, lower back and rump like the crown in gen- 

 eral color, but with more buff prevailing; the feathers are vermiculated 

 with the three colors, white silvering the whole so as to shade the entire 

 upper surface ; the feathers on the rump and upper tail-coverts are inclined 

 to be definitely barred and not vermiculated. 



Tail : The two central rectrices dull seal-brown, strongly vermiculated 

 with silvery and buffy white, the brown presenting toward the base of the 

 feathers bar-like pattern ; the remaining rectrices, seen from above, are 

 distinctly buffy, shading to white at the outer edges and crossed by five or 



