446 



FALCONIDiE. 



moustache, brown ; rest of under surface of body white ; the breast 

 thickly covered with blackish central streaks to the feathers ; the 

 thighs and under tail-coverts buify white, the former tinged with 

 rufous. 



Ohs. The adult female of this bird closely resembles the male 

 of the Common Hobby, but may be distinguished unfailingly by the 

 black bars on the upper surface and on the tail, which the Hobby 

 never has. The young birds are also liable to be confounded together ; 

 but the immature of the present species, besides having black bars 

 on the secondaries and lower back, has a grey tail with conspicuous 

 black transverse bars, whereas in the young Hobby the tail is blackish, 

 with rufous cross bars. 



Hah. Amoor Land, North China, Nepaul, migrating along the east 

 coast of Africa to Natal and the Zambesi ; Damara Laud. 



a. S fid. sk. 



h, c. S $ ad. sk. 



d, e. PuU. sk. 



/. S ad. sk. 



g, h. (S juv. sk. 

 i. 2 ad. St. 

 k, I. d 2 ad. sk. 

 tn. (S ad. st. 



Peking', June 1868. 

 Chefoo, May 1873. 

 Chefoo, Aug. 18th, 



1873. 

 Chefoo, Sept. 29th, 



1873. 

 Nepaul. 

 Zambesi. 

 Zambesi. 

 Natal. 



R. Swinhoe, Esq. [P.J. 

 R. Swinhoe, Esq. [P.]. 

 R. Swinhoe, Esq. [P.]. 



R. Swinhoe, Esq. [P.]. 



B. H. Hodgson, Esq. [P.]. 

 Dr. Livingstone [0.]. 

 Dr. Kirk [P.]. 

 J. H. Gurney, Esq. [P.]. 



20. Cerchneis ardesiaca. 



Falco ardosiacus, Bonn, et Vieill. Mic. Meth. i. p. 1238 (1823); Hartl. 



Om. W.-Afr. p. 9 (18-57). 

 Falco concolor, Temm. PI. Col. i. pi. 330 (1825, nee descr.) ; Sic. B. 



W. Afr. i. p. 112, pi. 3 (1837). 

 Falco unicolor, Sicains. Classif. B. ii. p. 212 (1837). 

 H^iDotriorcliis ardesiacus, Bp. Camp. i. p. 26 (1850) ; Gray, Hand-l. 



'B. i. p. 21 (1869). 

 Falco ardosiacus, Fritsch, Vog. Eur. tab. 3. fig. 4 (1858) ; Scld. 3Im. 



P.-B. Falc. p. 21 (1862) ; Hem/l. Om. N.O.-Afr. i. p. 34 (1869) ; 



Schl. Reime Accipitr. p. 38 (1873). 

 Dissodectes ardesiacus, Scl. Ibis, 1864, p. 306. 

 ^salon ardosiacus, Bp. Mev. et Mag. de Zool. 1854, p. 536 ; Sauza, 



Cat. Lkb. Mu.s. p. 44 (1869). 



Adidt male. Slaty grey, with dark shaft-stripes to the feathers, es- 

 pecially distinct on the head and neck ; quills dark brown, the inner 

 secondaries slaty grey like the back, the outer ones clearer grey to- 

 wards the tips ; tail slaty grey, paler towards the tip, with whitish 

 bands on the inner webs ; under surface pale slaty gi'ey, with black 

 shaft-stripes to the feathers ; the throat and sides of the face whitish ; 

 cere, orbits, and feet yellow ; bill dark leaden blue ; iris dark. Total 

 length 14 inches, culmen 1, wing 8'9, tail 6-4, tarsus 1-6. 



Hah. Western and North-western Africa. 



