244 MESSRS ROBINSCN AND KLOSS ON 



Summarising the above, A. s. Ruperciliaris liaa wings between 

 45-51 mm : A. s. schwaneri wings between 50—56 mm. 



The Sumatran bird is A. s. schwaneri : the Javanese race, 

 A. s. voedermanni (Buttik.), of which we have a large series, is very 

 distinct. 



341. Stoporala thalassina thalassina (Swains.). 



2Iuscicapa thalussiva, tSwainsoii, Nat. Hist. Flycatcheis, 1838, 



p. 252 (India). 

 Stojyorala melanops, A., p. 227 (Mergui to Bankasoon); C, i, p. 285 



(Tenasserim); I., p. 83 (Koh Lak); M., p. 214 (Patiyii). 



Birds from Nong Khae and Koh Lak, S. W. Siam, though in 

 slightly immature pkimage, have wings 86, 88, 89 mm. There seems 

 to be no difference in colour between the Indian and Malayan races, 

 but the former has the wing over 80 mm., whereas in the southern 

 bird it is less. 



342. Stoporala thalassina thalassoides ( Cab.). 



Glauconiyias thalassoides, Cabanis, Mus. Hein, i, 1850-1, p. 53 



I Sumatra). 

 Stoporala thalassoides, F., p. 54 (Trang). 

 Stoporala melanojjs, Jlume, Sti-ay Feathers, ix, 1880, p. 114 



(Ghirbi). 



Id ad. Tasan, Chumporn, Peninsular Siam, 23 March 1919 

 (No. 4821). 



" Iris dark ; bill and feet black ". 



Total length 150; wing, 72; tail, 65; tarsus, 14.5; bill from 

 gape, 16 mm. 



This bird, on account of its small size, seems undoubtedly to 

 belong to the Malayan race. 



A. Hume & Davison, Stray Feathers, vi, 1878. E. O. Grant, Fasciculi Malayenses, iii (Birdsl, 1905- 



B. Miillcr, nie Ornis der Insol Salansa, 1882. F. Kobinson and Kloss, Iliis, 1910-11. 



C. Oates, Birds Brit. Biiriiuih, Vols, i iV: ii, 1883. G. (iairdner, Joiirn. N. H. Hoc. Siam, i, 1915. 



D. Bonhotu. V. Z. S. 1901, Vol. i. H. Robinson, Journ. F. M. S. Museums, v, 1915. 



JOURN. NAT. HIST. SOC. SIAM. 



