r R E F A C E. 



In concluding, in the 'Ibis' for 188.2, p. 598, my Notes on 

 Mr. Sharpens ' Catalogue of the Diurnal Birds of Prey in the 

 British Museum,' I mentioned my intention of supple- 

 menting them by a tabular index for the convenience of 

 future reference; it subsequently occurred to me that it 

 might be useful to combine with this index a list of the 

 several species and subspecies of Diurnal Birds of Prey, so 

 far as I am acquainted with them, and to add references to a 

 few of the works in which they have been figured, described, 

 or otherwise noticed. This enlargement of my original 

 intention and consequent increase of bulk has necessitated 

 the publication of the following pages in a separate form 

 rather than, as was originally proposed, in a number of the 

 ' Ibis.' I have thought it convenient to arrange my matter 

 in columns, of which the first contains the list of species or 

 subspecies^ and also the references to Mr. Sharpe's Cata- 

 logue ; the second column refers to my Notes on that work, 

 and to some other Notes which I have contributed to the 

 pages of the ' Ibis ' ; the third comprises miscellaneous 



' Those ?pecies and subspecies which I have uot personally examined 

 are marked with an asterisk, and those as to the validity of which I feel 

 some doubt with a note of interrogation. 



