154 
ALLEN’S naturalist’s 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 
L.AGOPUS. 
Falco las^npus, Grtielin, Syst. Nat. i. p. 260 (1788). 
Buteo lagopus, Macg. Brit. B. iii. p. 193 (1840); Newt. ed. 
Yarr. Br. B. i. p. ir; (1871); Saunders, Man. Br. B. p. 
313(1889); Lilford, Col. Fig. Brit. B. part xiv. (1890). 
Archibuteo lagopus, Sharpe, Cat. B. Brit. Mus. i. p. 196 (1874) ; 
Dresser, B. Eur. v. p. 471, pis. 334, 335 (1875) ; B. O. U. 
List Br. B. p. 95 (1883). 
Aqtitla lagopus, Seebohm, Br. B. i. p. in (1883). 
Adult remale. — 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-white, spotted with brown ; cere yellow ; bill dark 
horn-colour ; toes yellow ; claws dark horn-colour ; iris hazel. 
Total length, 26 inches; cuhnen, i‘4S 1 wing, 18-7; tail, lo'o; 
tarsus, 3'i. 
Adult Male. — Similar to the female, but a little smaller. Total 
length, 22-5 inches ; wing, 17-1 ; tail, lo'o ; tarsus, 2-8. 
Young Birds. — Resemble the adults, but are rather browner, es- 
peeially 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. 
