AVIFAUNA OF LAYSAN, ETC. 



185 



THE GENUS PSEUDONESTOR 



Pseudonestor, Rothsch. Bull. B. O. C. vol. i. p. xxxv (1893) ; id. Ibis, 1893, p. 438 (reprinted). 



This most remarkable genus belongs to the Drepanida and not to the Fringlllidce, as I 

 thought from a superficial comparison when first describing it, accepting at the time 

 Dr. Gadow's theory that Tsittirostra was a genus of the Fringillldce. It does not differ in 

 any structural characters from Ileterorhynchns, except in the formation of the bill, with its 

 enormously hooked maxilla and the very broad mandible. A.lso in colour it is strikingly 

 like Heterorhynchus lucidus. The feather-tracts, too, are like those of Ileterorhynchus, the 

 plumage is just as soft and full. 



The tongue is distinctly Drepanine. 



The sexes are similarly coloured, but the female is much duller and considerably smaller, 

 the bill especially is very much smaller and less hooked. 



Only one species is known. 



