1 9G FALCOXIDJE. 



1. Archibuteo lagopus. 



Le Faucon a teste blanche, Briss. Orn. i. p. 325 {17G0). 



Falco lagopus, G»i. S. N. i. p. 260 (1788, ex Briinn.) ; Naum. Fog. 



Deittschl. i. p. 359, Taf. 34 (1822) ; Schl. u. Susem. Vog. Eur, Taf. 34 



(1839). 

 Falco sclavonicus. Lath. Ind. Orn. p. 26 (1790). 

 La Buse gantee, Lemill. Ois. (TAfr. i. p. 79, pi. 18 (1799). 

 Buteo pennatus, Daud. Traite, ii. p. 156 (1800). 

 Falco phiinipes, Drnul. Traite, ii. p. 163 (1800, ex Levaill.). 

 Buteo lagopus, Leach, Syst. Cat. 3Iamm. ^-c. Brit. Mus. p. 10 (1816) ; 



Gould, B. Eur. i. pi. 15 (18:38) ; Macgill. Brit. B. iii. p. 193 (1840); 



Yarr. Brit. B. i. p. 87 (1843) ; Bailh/, Orn. Sav. i. p. 133 (1853) ; 



Schl. Vog. Nederl. pis. 33, 34 (1854) ; Midd. Sibir. Beis. p. 126 



(1853);"^cA/. 3Ius. P.-B. Buteones.p. 1 (1862); Snndev. Sv. Fogl. 



p. 227, pi. xxvii. fig. 5 (1869); Neivt. ed. Yarr. Brit. B. i. p. 117 



(1871); Schl. Revue Accipitr. p. 105 (1873). 

 Archibuteo planiceps, Brehm, Vog. Deutschl. p. 40 (1831). 

 Archibuteo alticeps, Brehm, torn. cit. p. 41 (1831). 

 Butaetes buteo. Less. Traite, p. 82 (1831). 



Butaetes lagopus, Bp. Comp. List B. Eur. 8f N. Am. p. 3 (1838). 

 Archibuteo lagopus, Gray, List Gen. B. p. 3 (1841); id. Gen. B. i. 



p. 12, pi. 5. fig. 1 (1849) ; StricM. Orn. Si/n. p. 38 (1855) ; Fritsch, 



Vo(/. Eur. p. 20, Taf. 5. fig. 9 (1858) ; Newt. Ooth. Wolley. p. 121 



(1864) ; Deql. ^- Gerbe, Orn. Europ. i. p. 64 (1861) ; Gray, Hand-l. 



B. i. p. 9 (1869) ; Salvad. Faun. Ital. Uce. p. 10 (1871). ' 



AduU female. Entire head and neck white, streaked with dark 

 brown, more especially on the checks and sides of neck ; upper sur- 

 face of body deep brown ; the scapulars and least wing-coverts with 

 conspicuous white bases, and most of the feathers margined with 

 fawn-colour, producing a somewhat streaked appearance ; quills 

 brown, the primaries externally ashy grey, and inclining to blackish 

 brown towards the tip, the secondaries browner, and tipped nar- 

 rowly with whitish, all the quills white for greater extent of inner 

 web ; upper tail-coverts pure white, with a distinct subterminal bar 

 of blackish brown ; tail white for two thirds of its length, shading 

 off into ashy brown tinged with rufous, with a broad subterminal 

 band of black before a whitish tip ; under surface of body white ; 

 the throat washed with buff like the sides of the neck and narrowly 

 streaked with dark brown, these streaks broader but more irregular 

 in shape on the breast ; belly and flanks entirely dark brown, except 

 in the centre of the abdomen, which is mottled with fulvous; thighs 

 and tarsal feathers fulvous white, with numerous spots of brown ; 

 under tail-coverts white ; under wing-coverts white, streaked more 

 or less with dark brown, the lower series white at base, ashy brown 

 towards tip ; cere yellow ; bill dark horn-colour ; feet yellow ; claws 

 dark horn-colour; ii'is hazel. Total length 26 inches, culmen 1*45, 

 wing 18'7, tail 10, tarsus 3-1. 



Adult male. A little smaller than the female. Total length 

 22-5 inches, wing IT'l, tail 10, tarsus 2-8. 



Young. Differing very little from the adult bird, from which it 

 may be distinguished by its browner colour, especially on the under 

 parts, by the more streaked appearance of the breast, and by the 



