332 FALCON ID.D. 



^'. Bill from gape f to f length 

 of mid-toe without claw. 



o". No crest Astub, p. 396. 



b^. A small occipital crest Lophospizias, p. 400. 



A'. Bill from gape about half mid- 

 toe without claw Accipitee, p. 402. 



k*. Bill from gape more than half 

 tarsus. (Buzzards.) 

 r". Lower part of tarsus naked all 



round Buteo, p. 389. 



k''. Tarsus feathered in front to 

 base of toes, naked and scu- 

 tellate behind Aechibuteo, p. 395. 



b. Lores very broad, densely feathered, with- 



out bristles *. {Honey-Buzzai'ds.) 

 c'. Loral feathers scale-like ; bill not much 



compressed Pernis, p. 405. 



d'. Loral feathers not scale-like ; bill ex- [p. 408. 



cessively compressed, culmen sharp . . Mach^rhamphus, 



B. Bill with two teeth on each side of upper 



mandible, opposite end of lower Baza, p. 408. 



C. Bill with one tooth on each side of upper 



mandible. 



c. Tail half to two-thirds as long as wing. 



e' . Size moderate ; wing never under 6. 

 [Falcons.) 

 e". Tail rounded, not graduated. 



h^. 2nd quill longest, 1st much longer 

 than 4th. 

 I*. Sexes alike ; foot long, mid-toe 



1-25-2-25 Falco, p. 412. 



m*. Sexes dissimilar ; foot small, 



mid-toe about 1 Erythropus, p. 424. 



P. 2nd and 3rd quills subequal, also 



1st and 4th ^salon, p. 426. 



f". Tail graduated, middle tail-feathers 

 exceeding outer by an inch or more ; 

 upper parts largely brick-red : sexes 



dissimilar Tinnunculus, p. 428. 



/'. Size very small, wing under 5 Miceohierax, p. 432. 



d. Tail nearly as long as wing : sexes dis- 



similar POLIOHIERAX, p. 434. 



Genus AaUILA, Brisson, 1760. 



The typical Eagles, constituting the present genus, are large 

 and powerful birds, and, from their grand appearance, have 

 acquired a reputation for courage which they scarcely deserve, as 

 they are much less courageous than the comparatively small 

 Hawks and Falcons. 



The bill is strong and slightly lengthened, curved from the 



* This only applies to Indian species. In the African Machcsrhamphus 

 (M. andcrssoni) the feathers on the lores have some bristles intermixed. 



