FALCONS AND ALLIED SPECIES. 175 



2. Buteo lagopm. JRough-legged Buzzard. Tarsus feathered ; 

 upper parts brown, variegated with yellowish ; lower yellowish, 

 with a large brown patch on the breast ; tail white to beyond 

 the middle, the rest brown. 



GENUS IT. AQUILA. EAGLE. 



Bill shorter than the head, very deep, compressed ; its upper 

 outline nearly straight and sloping to the edge of the cere, then 

 decurved, the sides slightly convex, the edges nearly straight, 

 with a slight festoon ; nostrils oval, oblique, head large, 

 roundish, flattened above ; feet rather short, very robust ; 

 tarsus roundish, feathered to the toes ; wings long, the fourth 

 quill longest. 



1. Aquila Clirysa'etus. Golden Eagle. Plumage dark-brown ; 

 occiput and hind-part and sides of neck and legs light brown- 

 ish-yellow ; wing-coverts light brown ; tail dark brown. Young 

 with the basal three-fourths of the tail white. 



GENUS III. HALIAETUS. SEA-EAGLE. 



Bill nearly as long as the head, very deep, compressed, 

 with its upper outline nearly straight to beyond the cere, then 

 decurved, the sides sloping and slightly convex, the edges 

 nearly straight, with a slight festoon ; nostrils oblong, oblique ; 

 head large, oblong, flattened ; feet rather short, very robust ; 

 tarsi roundish, bare for two-thirds, scaly, with about six scu- 

 tella in front ; claws large, curved, flat beneath ; wings long, 

 the third quill longest. 



1. Haliaetus Alhicilla. White-tailed Sea-Eagle. Adult with 

 the head and neck light brownish-grey ; the tail pure white. 

 Young with the head and neck dark-brown, streaked with 

 paler, the tail brownish-black, irregularly varied with white. 



GENUS IV. PANDION. OSPREY. 



Bill short, as broad as deep at the base, its upper outline 

 straight to the edge of the cere, then decurved, the sides con- 



