236 Mr. Blyth's Commentary 



Schlegel; F. 7'uber indicus, Aldrovandi; F. cummunis indicus, 

 Gm. ; F. shahin, Jerdon; F. sultaneus, Hodgson*. 



I have only seen Indian specimens of this Falcon, though it 

 doubtless occurs in the Indo-Chinese province, if not also in 

 the Malayan. Mr. Layard obtained it in Ceylon. 



10. Falco sacer. 



This is perhaps the doubtfully cited F. biarmicus of Vigne's 

 list, noticed as being " common in the plams under the Alpine 

 Punjab'^ (P. Z. S. 1841, p. 6) — unless, indeed, the common 

 F.jugger be intended, or, more probably, F. babylonicus. 



11. Falco jugger. 



It is remarkable that this very common Indian Falcon has 

 not hitherto been noted from the low northern half of Ceylon. 

 The young have pale lead- coloured tarsi and toes — not yellow, as 

 represented in Gould's figure (B. As. pt. i.). There is a living 

 adult at present in the Zoological Gardens f. 



12. Falco babylonicus, Gurney, Ibis, 1861, p. 218. " F. 

 peregrinoides/' Hodgson, J. A. S. B. xxiv. 574; G. R. Gray, 

 B. M. Catal. B. Nipal, 1st edit. p. 44 (" Red-uaped Falcon"). 



In his second edition of the catalogue in question, Mr. Gray 



from Nepal, and an adult male in the Norwicli Museum from Northern 

 India, have a much lighter colouring on the underparts than has hitherto 

 been figured or described as being the case in F. pereyrwrntor. If it be not 

 that this peculiarity is due to old age, Mr. Gurney supposes the two spe- 

 cimens just mentioned may belong to an undescribed species. — Ed.] 



* Undoubtedly the true F. sultaneus, H., though a figure in one of his 

 drawings represents, I suspect, a stray individual of the Australian F. mela- 

 nogenys; and such, also, may be Dr. Jerdon's supposed hybrid Falcon 

 (p. 20). 



t The F. subniger, Gray (Gould's ' Birds of Australia,' i. pi. ix.), appears 

 to me to be decidedly one of the Sakir and Laimer group in immature plu- 

 mage ; and F. hypoleucus, Gould (B. Austr.pl. vii.), I greatly suspect to be 

 no other than the adult of the same species. Professor Schlegel, I find, 

 has expressed the same opinion. I also suspect, with Dr. Jerdon, that 

 leracidea occidentalis, Gould, is merely the adult phase of /. berigora 

 (B. Austr. i. pi. vii.-ix.). Since writing the foregoing remarks, I have 

 seen Mr. Gould's useful 'Ilandbook of the Birds of Australia,' wherein he 

 retains alike Falco hypoleucus and F. subniger, leracidea berigora and /. 

 occidentalis ; but I am not satisfied that he does so correctly. 



