BIRDS FROM SIAM AND THE MALAY PENINSULA 63 



This form ranges from Tenasserim and southern Shan States to 

 northern Siam and southwestern Laos. 



Deignan *^ reports it as occurring on Doi Sutep from 4,400 feet to 

 the summit; de Schauensee ^* took a series there on his third trip to 

 Siam. 



The species has been divided into six related forms, occurring from 

 northern India to the mountains of southern Annam. 



ARBOROPHILA BRUNNEOPECTUS BRUNNEOPECTUS (BIyth) 



Arhoricola brunneopectus Blyth (Tickell MS.), Journ. Asiat. Soc. Bengal, vol. 24, 

 p. 276, 1855 (Tenasserim). 



One male, Khun Tan, 4,000 feet, February 17, 1932; one male, Doi 

 Hua Mot, August 26, 1934. 



This form occurs from Pegu and eastern Burma to Yunnan, northern 

 and western Siam. 



Williamson *'' reports it from Sai Yok, and Chasen and Kloss *' 

 record it from the Raheng district, western Siam, and three speci- 

 mens from their collection were received by the United States National 

 Museum; de Schauensee " took a male at Cliiengsen, and on his third 

 trip ^ he collected a series at Chiengm.ai and Chiengdao ; Deignan ** 

 says it is common on Doi Sutep above 4,600 feet; Gyldenstolpe ^^ gives 

 the additional record of Doi Vieng Par. 



Two closely related forms are found in Indo-China. 



ARBOROPHILA CAMBODIANA DIVERSA Riley 



Arborophila diversa Riley, Proc. Biol. Soc. Washington, vol. 43, p. 189, 1930 

 (Kao Sabab, Cliantabun, southeastern Siam). 



Two males and three females, Kao Sabap, 3,000 feet, January 8^ 

 1930, November 21, 1933. 



When tliis bird was described, only the description of Arborophila 

 cambodiana Delacour and Jabouille was before me, and I did not 

 realize that it was as distinct as it really is. Soon after the descrip- 

 tion came out, M. Delacour kindly sent me an advance copy of the 

 plate afterwards published.^' From this plate there are certain dif- 

 ferences apparent ttiat were not emphasized in the original descrip- 

 tion. The plate of A. cambodiana shows the feathers of the lower 

 throat only narrowly bordered with black, the basal color predomi- 

 nating, whereas in A. diversa the lower throat is black, the basal color 

 hardly showing or not at all. The color of the chest and breast is 



« Journ. Siam Soc. Nat. Hist. Suppl., vol. 8, p. 168, 1931. 



wproc. Acad. Nat. Sci. Philadelphia, vol. 86, p. 275, 1934. 



*'' Journ. Nat. Hist. Soc. Siam, vol. 3, p. 32, 1918. 



*» Journ. Siam Soc. Nat. Hist. Suppl., vol. 7, p. 154, 1928. 



«» Proc. Acad. Nat. Sci. Philadelphia, vol. 81, p. 682, 1930. 



•« Proc. Acad. Nat. Sci. Philadelphia, vol. 86, p. 275, 1934. 



•1 Journ. Siam Soc. Nat. Hist. Suppl., vol. 8, p. 168, 1931. 



" Kungl. Svenska Vet.-Akad. Handl., vol. 56, no. 2, p. 156, 1916. 



•» Oiseaux I'Indochine Frangaise, vol. 1, pi. 13, 1931. 



