FROM WESTERN SUMATRA. 21 



Amongst the Javan specimens are both, the young orange- 

 red-crested male with the fawncolored forehead and the 

 adult female, figured on plate 90 (P.O.), and I must say that 

 figures and coloration are very correct. Besides these two 

 specimens are a second female and two entirely red-crested 

 adult males iH. Hartlauhii Malh.), which latter have the 

 crest of a very lively vermilion instead of orange-red, and 

 which I think to be nothing but the fully adult stage of 

 Temminck's P. concretus. All our adult male specimens 

 from other localities are red-capped with a gray postocci- 

 pital crest, not excluded those mentioned by Temminck 

 from Banda (read Banka) and Sumatra. Our material shows 

 very clearly that Temminck counfounded in some way 

 Javan with Sumatran specimens, as we possess no entirely 

 red-crested specimens neither from Banka nor from Sumatra 

 and when he says, when speaking of the birds generally, 

 that those with the gray postoccipital crest [H. sordidus) 

 are young males assuming the plumage of the adult, he 

 could only mean Sumatra and Banka specimens, as we 

 possess no such ones from Java. 



When speaking of the difference of the Sumatran speci- 

 mens, he leaves entirely out of consideration those from 

 Banka, which omission could lead to the conclusion that 

 the latter would be identical with those from Java , while 

 they really cannot be distinguished from those from Su- 

 matra. 



As to the specimens from all hitherto known localities, 

 except from Java, I fully agree with the Marquis of 

 Tweeddale, that they all undoubtedly belong to one and 

 the same species, of which the oldest title — that of H. 

 concretus restricted to the Javan species, figured by Tem- 

 minck on plate 90 — would be H. sordidus Eyton. 



The essential distinguishing characters of both species 

 can be formulated as follows : 



1. Hemicercus concretus^ Temm. P. C. IV. SO (nee descr. 

 mar. jun.) ; — Rchb. Scansoriae, p. 401, tab. 656, fig. 

 4361—63. 



Notes from the Leyden ]VIuseum , Vol. IX. 



