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APPENDIX. 



Mr. Hume has very generously presented to the India Office some plates of Indian birds, 

 which had been prepared for his contemplated work on the Avifauna of the British Asian 

 Empire. I have therefore availed myself of the opportunity to utilize these plates on the 

 present occasion, as some of them are excellent examples of Mr. Keuleman's work. 



1. HlEHOFALCO SAKER. (PlatcS XVI.-XIX.) 



Falco sacer, Gm. Syst. Nat. i. p. 273 (1788). 



Hierofalco saker, Sharpe, Cat. B. Brit. Mus. i. p. 417 (1874). 



I here give a few remarks on the changes of plumage in the Saker Falcon, based upon 

 the material in the Hume Collection : — 



Young male. General colour above nearly uniform brown, with somewhat of an ashy 

 shade and a slight indication of rufous margins to the feathers of the lower back and rump 

 and upper wing-coverts ; the scapulars with a few rounded whitish spots ; tail-feathers brown, 

 shaded with ashy and rather broadly tipped with white, and having the inner web barred, and 

 the outer web roundly spotted, with rufous or rufous-white ; quills dark brown, the primary- 

 coverts and secondaries with rufescent edges like the scapulars, the primaries dusky below 

 and broadly banded with pale rufous for nearly the entire extent of the inner web, these light 

 bars on the inner web often forming broad triangular notches ; crown of head pale tawny 

 rufous, rather broadly streaked with black ; the hind neck whitish, with broad centres of 

 dusky brown to the feathers ; lores and base of forehead buffy white ; a superciliary band of 

 white, narrowly streaked with black, forming an indistinct eyebrow ; feathers behind the eye 

 and a broad streak along the upper edge of the ear-coverts dark brown ; remainder of the 

 ear-coverts whitish, narrowly lined with black ; from below the eye a broad moustachia] 

 streak of black obliquely crossing the cheeks to the sides of the throat ; the fore part of the 

 cheeks white like the throat ; remainder of the under surface of body ochreous buflF, very 

 broadly streaked with blackish brown ; the upper part of the thighs uniform dark brown, 

 rest of the thighs creamy white, streaked with brown ; the upper part of the tarsus also 

 feathered in front; lower abdomen and under tail-coverts creamy buff ; the flank-feathers 

 very uniform brown, the feathers being broadly edged externally with sandy buff, while on 

 the inner web of many of them is an ovate spot of sandy buflf, indicating a break-up of the 

 pattern of the feather ; axillaries brown with twin spots of sandy buff ; under wing-coverts 

 also brown, with edgings and spots of sandy buff, the smaller coverts sandy buff streaked with 

 brown, especially near the edge of the wing ; lower primary-coverts ashy, like the quill-lining, 

 with twin spots of creamy buflf. Total length 20 inches, wing 14*5, tail 80, tarsus 2*5. 



