lO. FALCO. 407 



Atlas, Rapaces, pi. 10 (1827) ; Gould, B. Eur. i. pi. 24 (1837) : 



Macgill. Brit. B. iii. p. 317 (1840) ; Yarr. Hist. Brit. B. i. p. 48 



(1843) ; Thomp. B. Irel. i. p. .51 (1849) ; Midd. Sibir. Itcis., Voff. 



p. 129 (18.51); Sclil. Vor/. Nedcrl. pis. G, 7 (1854); Stricld. Orn. 



Stjn. p. 90 (1855) ; Hewits. Eggs Brit. B. i. p. 30, pi. 10. iig. 1 



(1856); Fritsch, Tog. Eur. tab. 3. fig. 7 (1858); HcM. Dier. 



Nederl. Vog. pi. 1. figs, o, (18(il); id. Mus. P.-B. Falc. p. 19 



(18G2) ; Radde, Eeis. Sibir. ii. p. 101 (1863); Neut. OotJt. Wolley. 



p. 105 (1864); Gould, B. Gt. Br. pt. vii. (18(^5); Sundi'v. 6'y. 



Fogl. p. 213, pi. xxvi. tig. 3 (1869) ; Borggr. Vogelf. Norddeutschl. 



p. 55 (1869); Hcugl. Oru. N.O.-Afr. i. p. 35 (1869); Newton, 



ed. Yarr. Brit. B. i. p. 74 (1871); Shelley, B. of Egypt, p. 191 



(1872) ; ScJd. Revue Accipitr. p. 37 (1873)1 

 Falco falconiarum, Gm. S. N. i. p. 284 (1788). 

 Falco smiriUus, Savign. Ois. d'Egypte, p. 279 (1808). 

 Falco sibiricus, Shaiv, Gen. Zool. vii. pt. 1, p. 207 (1809). 

 Falco Ccesius, Meyer, Tasckenb. Detttschl. Vogelk. i. p. 60 (1810). 

 Hj-potiiorchis sesalon, Gray, Gen. B. i. p. 20 ( 1844 ) ; Bp. Consp. i. 



p. 26 (1850) ; Horsf. ^- Moore, Cat. B. Mus. E. I. Co. i. p. 24 



(1854) ; Powys, Ibis, 18(50, p. 7 ; Godman, t. c. p. 79 ; Jerd. B. Lid. 



i. p. 35 (1862) ; More, Ibis, 1865, p. 10 ; Tristr. t. c. p. 2.58 ; Farm. 



Ibis, 1868, p. 412; Gray, Hand-l. B. i. p. 21 (1869) ; Saund. Ibis, 



1871, p. 59. 

 .^salon Eesalon, Kaup, Contr. Orn. 1850, p. 54. 

 Asalon lithofalco, Bp. Rev. et Mag. de Zool. 1854, p. 536 ; Brehm, 



Naum. 1855, p. 2U9; Sundev. Sv. Fogl. pi. xxvi. fig. 3 (1869); 



Gurney, Ibis, 1872, p. 327. 

 Merliu, Salvin i^- Brodr. Falconry, p. 79, pis. vii., viii. (1855). 

 Asalon orientalis, Brehm, Naum. 1855, p. 269. 

 .^salon regulus, Blyth, Ibis, 1863, p. 9. 

 Lithofalco sesalon, Hume, Rough Notes, i. p. 89 (1869) ; Jerd. Ibis, 



1871, p. 242. 



Adult male. Above clear slaty blue, paler on the rump and upper 

 tail-coverts, the black shafts on all the feathers distinctly indicated ; 

 head dark slaty, with broad shaft-stripes ; forehead, lores, and sides 

 of the face whitish, with black median lines to the feathers ; evebrow 

 and nape strongly mixed with rufous ; ear-coverts tinged with grey 

 on the hinder part ; throat pure white ; sides of the neck and entire 

 underparts white, strongly washed with rufous, with distinct median 

 Bhaft-stripes of black, these being more narrow and indistinct on the 

 thighs, and rather broader on the under tail-coverts ; under win"-- 

 coverts white, spotted and barred with black ; quills black, barred 

 with greyish white on the inner web, and washed with bluish grey 

 near the base of the outer, the inner secondaries bluish like the back, 

 with black shafts ; tail slaty blue, tipped with white, before which 

 is a broad subterminal band of black on the inner web, underneath 

 remains of other black bands ; cere yellow ; biU bluish horn-colour, 

 darkest at tip ; feet yellow, claws black ; iris dark brown. Total 

 length 10 inches, culmen 0*7, wing 7-9, tail 4-5, tarsus 1'45. 



Adult female. Similar to the male, but a little larger. Total length 

 12 inches, culmen 0-9, wing 8-8, tail 5-5, tarsus 1-5. 



Young. Above brown, with a very slight shade of ashy grey, 

 clearer on the rump, all the feathers margined with pale sandy 



