On the Avifauna of the Sandwich Islands. 89 



3. X. cyanodorsalis (Dubois) ^ from Central Columbia {X. 

 incas, part., Sharpe) . White postfrontal band extended over 

 vertex ; nape blue ; back washed with blue ; abdomen pale 

 yellow. 



4. X. incas (Bodd.), from Western Columbia, Ecuador, 

 Peru^ and Bolivia. Whole nape and top of head white, 

 slightly washed on the nape with bluish in some specimens ; 

 back green ; abdomen yellow. 



Of this last species I have examples before me from Antio- 

 quia (Salmon) ; Bucaramanga, Magdalena valley {Wyatt) ; 

 Maravina, Ecuador [Buckley) ; Peru ; and Yungas, Bolivia 

 [Buckley) . 



In my opinion these four forms, of which only the more 

 salient characters are above given, are entitled to specific 

 rank. The Venezuelan form comes nearest to the northern 

 bird, as is the case in other groups with similar distribu- 

 tion. In the same way Catharus aurantiirostris of Venezuela 

 is more like C. melpomene of Mexico and Central America 

 than any of the Columbian forms of the same genus. 



VII. — On recent Additions to our Knowledge of the Avifauna 

 of the Sandwich Islands. By P. L. Sclater. 



(Plate 11.) 



Some time ago I contributed to this Journal"^ a summary of 

 what was then known of the avifauna of the Sandwich Islands, 

 based mainly upon an article upon the subject by Mr. Dole, 

 which had appeared in the ' Proceedings ' of the Boston So- 

 ciety of Natural History a short time before. From its re- 

 moteness from all other land, and from the known peculiarities 

 of its fauna, the Sandwich-Island archipelago presents fea- 

 tures of no ordinary interest ; and it is much to be desired 

 that a complete investigation of its native fauna and flora 

 should be made before they are destroyed by civilization or 

 contaminated by the intrusion of wandering forms of general 

 distribution. Looking to the facility of access to the Sand- 



* Ibis, 1871, p. 356. 



