154 ALLEN S NATURALISTS LIBRARY. 



overhanging shelf, whereas in the Eagles the nostril is gener- 

 ally a perpendicular oval, and exposed, or, in rare instances, 

 round. 



I. THE ROUGH-LEGGED BUZZARD-EAGLE. ARCHIBUTEO 

 LAGOPUS. 



Falco lagopus^ Gmelin, Syst. Nat. i. p. 260 {1788). 



Buteo lagopiis, Macg. Brit. B. iii. p. 193 (1840) ; Newt. ed. 



Yarr. Br. B. i. p. 117 (1871); Saunders, Man. Br. B. p. 



313 (1889); Lilford, Col. Fig. Brit. B. part xiv. (1890). 

 Archibuteo lagopiis, Sharpe, Cat. B. Brit. Mus. i. p. 196 (1874) ; 



Dresser, B. Eur. v. p. 471, pis. 334, 335 (1875) j B. O. U. 



List Br. B. p. 95 (1883). 

 Aquila lagopHS, Seebohm, Br. B. i. p. iii (1883). 



Adult Female. — General colour above deep brown, the head 

 and neck white, streaked with dark brown, especially on the 

 cheeks and sides of the head ; lesser wing-coverts and scapulars 

 with white bases, and margined with buff, imparting a streaked 

 appearance to these parts ; quills brown, white for the greater 

 part of the inner web; upper tail-coverts white, with a sub- 

 terminal bar of brown ; tail white, inclining to ashy-brown and 

 tinged with rufous for the terminal third of its length, the tip 

 white with a broad sub-terminal bar of black ; under surface of 

 body white, the throat washed with buff like the sides of the 

 neck, and streaked with dark brown, more broadly on the breast; 

 lower breast and abdomen dark brown, the latter mottled with 

 buff in the centre ; under tail-coverts white ; thighs and tarsal 

 plumes buffy-vvhite, spotted with brown ; cere yellow ; bill dark 

 horn-colour ; toes yellow ; claws dark horn-colour ; iris hazel. 

 Total length, 26 inches; culmen, i"45; wing, 187; tail, lo'o; 

 tarsus, 3 "I. 



Adult Male. — Similar to the female, but a little smaller. Total 

 length, 22*5 inches; wing, I7"i ; tail, io"o; tarsus, 2*8. 



Young Birds. — Resemble the adults, but are rather browner, es- 

 pecially below, where the breast is more streaked ; the tail also 

 brown for its terminal half, with no perceptible sub-terminal 

 band. 



Characters. — Distinguished from the ordinary Buzzards by the 

 feathered tarsi, and from any of the feathered-legged Eagles by 

 the different form of the nostrils, and by the lesser size. 



