Coast and Islands of South-eastern Siam. 751 



not the case is shown by the light colonring of the angle 

 of the wing, by the smaller dimensions, and by the symmetry 

 of the white markings. From M. crassirostris of Trang and 

 Langkawi it is separable by the much slenderer bill and by 

 the much darker ground colouring, and from M. temmincki 

 by the absence of pale spots on the median under wing- 

 coverts. 



Mixornis gularis rubricapilla. 



Mixornis rubricapilla (Tick.) ; Sharpe, Cat. vii. 1883, 

 p. 578 ; Gyldenstolpe, p. 21. 



a-c. IS, 2?. Koh Chang I., S.E. Siam. 5 Dec, 

 1914. 



d. \S . Koh Rang I., S.E. Siam. 21 Dec, 1914. 



e. 1 c? . Koh Kut I., S.E. Siam. 25 Dec, 1914. 

 f.lS. Klong Menao, S.E. Siam. 12 Jan., 1915. 



" Iris white tinged with brown, yellow-ochre, yellow, or 

 ochreous ; upper mandible black, sooty or leaden, lower 

 mandible plumbeous; feet yellowish olive. '^ — C. B. K. 



As Hume has already observed, there is a perfect gradation 

 between the Siimatran and Malayan M. gularis, with heavily 

 striped throat, rich chestnut head, and the back and external 

 aspect of the wings brown, and the Himalayan and Burmese 

 M. rubricapilla with the streaks on the throat reduced to 

 shaft-stripes, the chestnut on the head much paler, and the 

 back and external aspect of the wing greenish olive. As 

 noted elsewhere, the meeting place of the two forms is the 

 southern provinces of Siam in the Malay Peninsula, speci- 

 mens from Bandon and the adjacent islands being exactly 

 intermediate. 



The present series are typical M. g. rubricapilla. 



Zoothera marginata. 



Geocichla marginata Seebohm, Cat. v. 1881, p. 162 ; Gates, 

 Faun. Brit. Ind., Birds, ii. 1890, p. 157. 



a,b. 1 c? , 1 ? • Klong Yai, S.E. Siam. 7 Jan., 1915. 



" Iris dark ; bill black, lower mandible horny ; feet 

 brown."— C. B. K. 



