96 The Buzzards of the Himalaya and Tibet. 



somewhat from the type of the genus. But Strophiatus is, as de- 

 cidedly, no Buteo, nor Archibuteo, but a type osculant towards Aquila 

 from Archibuteo. Accordingly, as my suggested sub-generic terms 

 Butaquila and Hemisetus have not been adopted in the sense in 

 which I used them, I shall make a fresh appropriation of both, 

 applying the former to Strophiatus and the latter to Imperialis, a 

 form which it is impossible to retain in the same genus with Chrysae- 

 tos. The coarse massive structure and necrophagous habits of 

 Imperialis, are entirely alien from the noble form and habits of Chry- 

 saetos, a bird whose structure is as much more highly raptorial in its 

 superior lightness of figure, and enormous development of talons, as 

 might be expected from his exclusively, or almost exclusively, life- 

 destroying habits. This species it appears is the Dapheni of the 

 Himalaya and of Tibet, to which regions it is nearly confined, 

 whereas the imperial Eagle (Bifasciata vel Crassipes vel Heliaca, vel 

 Nipalensis) is common all over the plains, where I have very often 

 seen and shot him, whilst scavengering with the vultures and contend- 

 ing with them over putrid carcases. Such diversities of form and 

 manners as characterize Chrysaetos and Imperialis cannot, with any 

 propriety, be overlooked, and accordingly, I shall consider Imperialis 

 in future as the type of Hemiaetus, and apply the term Butaquila to 

 Strophiatus, a type having a general resemblance to Archibuteo, and 

 belonging to the Buteoninse, but differing therefrom, and approaching 

 Hemisetus of the Aquilinee by the greater length and straightness of 

 the bill, the longer and more lunate nares, the total absence of festoon 

 in the bill, and lastly and chiefly, the longer wings which, as in the 

 Eagles, are fully equal to the tail, and have the fourth quill longest, 

 and the fifth longer than the third. I am persuaded that closer 

 comparisons will induce Mr. Gray to adopt these views. I now pro- 

 ceed to our third species, which is a novelty just obtained from Cen- 

 tral Tibet, and I think a typical Archibuteo, the only one yet dis- 

 covered in these regions. 



Archibuteo cryptogenys, n. s. or Booted Buzzard of Tibet. 

 PL III, Fig. 1. 



Single specimen brought from Lassa by Bhotias employed to shoot 

 mammals in Tibet. Sex unknown. Tail and wings slightly injured, 

 but otherwise a good sample : in full plumage. 



