236 FALCONiu^i;. 



Atlas, Rapaces, pi. 15 (1827) : Schl. n. Susetn. Vog. Eur. Taf. 10, 



17 (1839). 

 Black-backed Eagle, Brotm, El. Zool. pi. 2 (1776). 

 Falco melanaetus, Gm. S. N. i. p. 254 (1788). 

 Falco canadensis, Gm. S. N. i. p. 256 (1788). 

 Falco albus, Gm. S. N. i. p. 257 (1788, r«r.). 

 Falco uiger, Gtn. S. N. i. p. 259 (1788, ex Broion). 

 Falco CYgneus, Lath. Ind. Orn. i. p. 14 (1790, vat:). 

 Falco melanonotus, Lath. Ind. Orn. i. p. 16(1790, ex Brown). 

 Falco aquila, Daud. Traite, ii. p. 47 (1800). 

 Aqiiila fulva, Sav. Descr. Ois. dEqypte, p. 251 (1809) ; Meyer, in 



Wolf II. 3Iey. Taschenb. devtsch. foe/elk. i. p. 14 (1810) ; Schl. Vog. 



Nederl. pls.'23, 24, 25 (1854) ; id. Slus. P.-B. Aquilte, p. 1 (1862) ; 



Degl. et Gerhe, Orn. Eur. i. p. 20 (1867) ; Loche, Expl. Sci. Alger. 



Ois. p. 19 (1867) ; Heugl. Orn. N.O.-Afr. i. p. 43 (1869) ; Shelley, 



B. Egypt, p. 205 (1872). 

 Aquila nobilis, Pall. Zoogr. Bosso-As. i. p. 338 (1811). 

 Aquila regalis, Temm. Man. d'Orn. ed. i. p. 10 (1815). 

 Aquila clirysaetus, Dwnont, Diet. Sci. Nat. i. p. 339 (1816) ; Sw. Sf 



Bich. Faun. B.-Am., Birds, p. 12 (1831) ; Gould, B. Eur. i. pi. 6 



(1837) ; Audub. B. Am. i. p. 50, pi. xii. (1839) ; Macgill. Brit. B. 



iii. p. 204 (1840) ; Grai/, Gen. B. i. p. 13, pi. 7. fig. 1 "(1845) ; Bp. 



Consp. i. p. 13 ; Cass. B. Calif, p. 109 (1855) ; Strickl. Orn. Syn. 



p. 55 (1855) ; Fritsch, Vog. Eur. tab. vii. figs. 1-3 ( 1858) ; Stindev. 



Si\ Fogl. pi. XXX. fig. 1 (c. 1800) ; Jerd. B. Lid. i. p. 55 (1862) ; 



Gould', B. Gt. Br. pt. 3 (1863) ; Peh. Verh. z.-b. Wien, 1863, p. 153 ; 



Badde, Beis. Sibir. Vog. p. 83 (1863) ; Xeivt. Oath. Wolley. p. 8 



(1864); Gray, Hand-l. B. i. p. 10 (1809) ; Hume, Bough Notes, 



i. p. 139 (1869); Neict. ed. Yarr. Brit. B. i. p. 11 (1871) ; Sieinh. 



P. Z. 8. 1871, p. 338; Sahad. Faun. Pal. Ucc. p. 5 (1871); 



Coues, Key N. Am. B. p. 219 (1872) ; Hume, Str. F. i. p. 157 



(1873). 

 Aquila regia, Less. Traite, p. 36, pi. 8. fig. 1 (1831). 

 Aquila daplianea, Hodgs. in Gray's Zool. Misc. p. 81 (1844). 

 Falco imperialis, Crespon, Faun. Merid. i. p. 131 (1844). 

 Aquila barthelemyi, Jaub. Eev. Zool. 1852, p. 545 ; id. et Barth. Lap. 



Bich. Orn. p. 34, pi. 2 (1859) ; Miirie, P. Z. S. 1870, p. 80. 

 Aquila fuscicapilla, Brehm, Natmi. 1855, p. 267. 

 Aquila canadensis, Cass, in BairfFs B. N. Am. p. 41 (1800) ; Ball 8)- 



Bonn. Tr. Chic. Acad. i. p. 272 (1869) ; Cooper, B. Calif. edBaird, 



p. 449 (1870). 



Nestling. Clothed -with pure white down, the feathers visible being 

 of a glossy chocolate- (almost bronzy) brown, the quills and tail- 

 feathers blackish, the latter with huffy white tips ; feathers of the 

 head and neck rufous brown. 



Young. Above brown, all the feathers with broad white bases, 

 showing conspicuously on the disarrangement of the feathers ; lores 

 whitish ; crown of head and ear-coverts black, the latter slightly 

 streaked with rufous ; hind head and neck tawny rufous, the bases 

 to the feathers smoky brown ; entire under surface of body light 

 brown, the feathers with broad white bases, the throat blackish, the 

 thighs and under tail-coverts tawny rufous ; quills blackish, the 

 secondaries browner, especially the innermost ; under surface of wing 

 blackish, the inner primaries white for more than half of inner web ; 



