7i6 



PATAGONIAN EXPEDITIONS : ZOOLOGY. 

 Fig. 366. 



Tyto perlata. Adult male, P. U. O. C. 7883. Showing relative length of quills. 



above, and shading to white on the tips and inner webs ; the primaries 

 with irregular fine flecking of brown obscured by grey, most plentiful near 

 the tips, and barred brokenly with six or seven dark brown bars, not entire, 

 crossing the feathers ; secondaries much like the primaries, but with definite 

 broad white tips ; the least wing-coverts buffy, with small spots of dusky 

 on each feather ; median series like the interscapular region ; primary 

 coverts much deeper brownish buff, with fleckings of dusky on a greyish 

 overwash and arrow-shaped pale buff spots near the end of each feather ; 

 under wing-coverts pure silvery white, a few of the lesser series with small 

 brown marks ; the axillaries immaculate silvery white ; the whole closed 

 wing seen from below is pure white, showing only the bars on the first 

 primary. 



Lower parts: Silvery white and silky in character; washed on the sides 

 and flanks and across the breast and chest with pale buff or cream color, 

 each feather in these places with a small arrow-shaped brown subterminal 

 mark ; rest of the under body immaculate white ; the leg feathers, except 

 for a buffy wash exteriorly on the thighs, immaculate white ; under tail- 

 coverts pure silvery white. 



