Ornithology of Borneo. 241 



2. Hemicercus hartlaubi. 



a,b, ^ ^ , c. Java (Wallace). 



3. Hemicercus sordidus. 



a, ad. Indian archipelago, b, $ ad. Malacca [Charlton; 

 type of species), c. juv. Malacca {Charlton), d, e,f, ^ ad. 

 Malacca, g, ^ ad., h, ^ juv. Malacca {Harvey) . e, c? . Sin- 

 gapore {Wallace), k, (J. Banjermassing (Afo^/ey). /, (^ . Sa- 

 rawak {Wallace). m,n, $ $ ad. Lumbidan {Low). 



4. Hemicercus brookeanus. 



a,b, $ % ad. Borneo, c, ? . Singapore {Wallace). 



That these species must be reduced in number is very evi- 

 dent to me ; and, to take them in their reverse order, I cannot 

 believe H. brookeanus to be more than a yellow-stained ex- 

 ample of H. sordidus, intermediate specimens being plentiful, 

 while the Bomean birds show several white- as well as yel- 

 low-edged feathers. 



As regards H. sordidus, of which we have the t}^ical ( $ ) 

 example in the British Museum, it seems to be a distinct 

 species ; but, as w^ill be seen below, it will have to bear the 

 older title of H. concretus. 



H. hartlaubi is very closely allied to H. sordidus ; but after 

 having seen a large number of the latter, all precisely similar, 

 I consider that the entirely red crest is a good character 

 for distinguishing the species. Its habitat is Malacca (/. 

 Gould), Java {Wallace), Sumatra {Teniminck), Borneo {mus. 

 Turati). The last locality is, perhaps, doubtful. I should 

 not be surprised if H. hartlaubi turned out to be the very 

 old full-plumaged H. sordidus. 



H. concretus of Temminck is founded on a young bird ; and 

 I am luckily able to trace from our series of specimens in the 

 Museum the progi'ess towards maturity. The crown at first 

 is entirely fawn-colour, with dusky grey bars, the male having 

 an occipital crest of pale red, the female wanting this red 

 crest. Mr. Gould considers the red crest to indicate an adult 

 stage, with a grey-headed female ; and as such he has figured 

 them in the twenty-eighth Part of the 'Birds of Asia •' but the 

 incompleteness of the plumage is proved by a specimen of a 



