the 



JOURNAL 



OF THE 



Natural History Society of Siam. 



Volume IV. BANGKOK. Number 2. 



+ MORE NOTES ON SIAMESE BIRDS. 



By C. Bodex Kloss, m.b.o.u. 



These remarks were intended as an addendum to my " Notes 

 on some recently-described Siamese Birds," but reached the Editors 

 too late for inclusion in Vol. Ill, No. 4. Since that article was in 

 print (pp. 447-53) I have heard from Mr. Stuart Baker that only 

 those examples of Otocompsa flaviventris from Pak Jong and its 

 neighbourhood and from Krabin are red-throated birds ; the speci- 

 mens from Peninsular, SW., W. and SE. Siam are all black- 

 throated (0. /. minor). 



Mr. W. J. F. Williamson has also, quite lately, sent me mate- 

 rial from his collection which throws further light on some of the 

 forms dealt with. His series of bulbuls from SW., N. and SE. 

 Siam are all of the black-throated kind. One bird of several from 

 Sriracha is interesting, as on careful inspection a slight trace of red 

 can be perceived at the base of the throat : thus proving that 

 joltnsoni, as I pointed out, is only an off-shoot and sub-species of 

 0. flaviventris. He has one red-throated bird from Phrabat, be- 

 tween Lopburi and Pak Jong. We shall eventually find, I fancy, 

 that 0. f. johnsoni only occurs east of the Menam Chao Phya and - 

 north of the latitude of Bangkok. 



The Southern black-throated bulbul (0. f. minor) is of the ■ 

 same size as johnsoni with wings not more than 87 mm. long ; Mr. 

 Baker writes me that the wings of the typical Northern form 



