1 91 8. J recently collected in Siam. 201 



Iris pale yellow (in juv. yellowish-white) ; bill and feet 

 black. 



Males : T. L. 195, 190, 186, 183; W. 85, 84, 83, 81. 



Females: T. L. 200, 190, 181, 177 (juv. 190, 185); 

 W. 84, 81, 80, 80 (juv. 75, 80). 



This handsome Bulbul, first obtained and described by 

 Count Nils Gyldenstolpe, appears to be peculiar to eastern 

 Siam, as black-throated birds neighbour it on the west and 

 in the north extend (^fide Oustalet, Nouv. Archiv. du Mus. 

 (4) p. 81) through Yunnan to Tonkin, while they also occur 

 in south-eastern Siam and Cambodia. Thus its distribution 

 is confined to eastern Siam with a possible extension to 

 central Laos and Annam, concerning which areas I can find 

 no records. 



It does not, as supposed, belong to the genus Rubigula — 

 for it has a well-developed crest, — but to Otocompsa^, 

 though the red throat-patch and general coloration give 

 it a superficial resemblance to Ruhiyula dispar of Java and 

 Sumatra with which it was originally compared, and to 

 R. gularis of southern India ; the gular patch has the 

 same shining appearance as in those birds, but in a very 

 modified degree. 



Except for the red throat, the colour of 0. f. John.toni 

 is exactly that of 0. f. flaviventris, of which it is a local 

 development, and it is therefore a much duller bird than 

 R. dispar. 



The individuals of my series vary considerably in the size 

 and colour of the red area — perhaps because they were col- 

 lected in the moulting season, — and it is only by a careful 

 examination of one male in moult that any indication of the 

 red colour can be found, for, save for a minute spot of red 

 on two or three of the feathers^ the throat is black, though 

 the feathers there are still rather glistening. In other 

 specimens in moult the throat-patch is small and the 

 feathers are parti-coloured black and red, and it is probably 

 only after several moults that the pure glistening red throat 



* Mesolophus Biittikofer, Notes Leydeu Museum, xvii. p; 247, 1895-6. 



