A REVISION OF THE GENVS GENN^US. 665 



specific rank, admitted no less than 36 species as good, not even 

 eliminating jonesi, which, as I have already shown, he named 

 from the same skin as that which Sharpe had already named 



Ogilvie-Grant, in Allen's Naturalists' Library, which was publish- 

 ed in 1895, recognizes 8 species and 3 sub-species, but at this time 

 material for comparison was scanty and even in the British Museum 

 there was but little to work on. 



Professor Ghigi, in the article to which I have alluded, gave 

 specific rank to 24 species, and finally Sharpe, in his "Hand-List," 

 has only allowed 16. The Hand-List, however, was also published 

 .as far back as 1899. 



Key to Species. 



A. Crest white .. . ... .. ... ... alhocristatus. 



B. Crest black. 



a. Upper plumage black, feathers pale edged 



and rump barred, breast white ... ... leucomelanus . 



h. Upper plumage black without pale edges 



and no bars on rump ; breast white . . . melanonotus. 



c. Upper plumage black and rump broadly 



barred with white; breast black... ... liorsfieldi. 



d. Upper plumage grey formed by tiny vermi- 



culations and bars of white and black ... lineahts. 



e. Upper plumage almost white with sparse 



narrow bars of black. 



a.\ Tail with narrow bars of black ; side 

 feathers of upper breast streaked with 

 white ... ... ... ... ... nyctliemerus. 



?>\ Tail with broad bands of black ; side 



feathers of upper breast pure white . . . ivhiteheadi. 



f. Scapulars crimson bronze ... ... ... sivinhoii. 



Key to Sub-species of TLorsfieldi. 



A. Upper plumage glossy black, rump boldly 



barred black and white contrasting 



strongly with back ... ... ... liorsfleld.i. 



B. Upper plumage with very fine vermicula- 



tions of white, but rump with bold bars 

 contrasting strongly with back ... ... cuvieri. 



C Upper plumage finely barred with black and 

 white, giving a general grey appearance, 

 rump barred black and white and con- 

 trasting distinctly but not strongly with 

 back ... .. ... ... ... trilliamsi. 



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