BIRDS FROM SIAM AND THE MALAY PENINSULA 387 



All the above localities are in northern Siam, and it is my belief 

 that so far as Siam is concerned this form is confined to that part of 

 the country, probably extending southward in western Siam. 



De Schauensee "^ records it from Chiengmai, Doi Sutep, 2,000 feet, 

 Chiengrai, and Chiengsen, all localities in the north. Deignan ^* 

 says that it ascends Doi Sutep to 3,500 feet and in cold weather 

 comes dowTi on to the plateau ; de Schauensee °* on his third expedition 

 adds the locality Chiengdao. 



The range of the form is the Himalayas from the Sutlej Valley to 

 east Assam and south to eastern Bengal, Burma, northern Siam, 

 Yunnan, Tonldn, and Cochinchina. 



OTOCOMPSA FLAVIVENTRIS MINOR Klosa 



Otocompsa flaviventris minor Kloss, Ibis, 1918, p. 200 (Koh Lak, southwestern 

 Siam). 



One male, Sriracha, May 24, 1925; two males, Nong Khor, near 

 Sriracha, September 26 and October 1, 1925; one male, Huey Yang, 

 Sriracha, August 3, 1932; two males, Kao Sabap, Chantabun, January 

 9, 1930, October 28, 1933; two males and one female, Kao Seming, 

 Krat, October 9-11, 1928; one male, Lem Ngob, August 24, 1931; 

 three males, Nong Yang, November 7, 1931; sLx males and one un- 

 sexed, Koh Chang, April 2-5, 1924, January 9, 12, 1926, March 11, 

 1930; one female, Koh Kut, May 22, 1929; one male, Muang Kanburi, 

 April 15, 1928; one female, Tha Lo, Bandon, September 27, 1931. 



Dr. W. L. Abbott collected four males and two females in Trang 

 (Lay Song Hong, November 30, 1896; Chong, January 21, 1897; 

 Trang, February 2, 12, 1897; January 28, 1899); and one male, Vic- 

 toria Point, Tenasserim, March 30, 1900. He gives the color of the 

 soft parts as: Iris pale yellow; bill black; feet dark leaden, black, or 

 dark brown. 



This form is not a well-marked one. It differs only in size from 

 0. f. flaviventris, and even this difference is not great and overlaps. 



The wings of nine males from northern Siam measure 84-89 (85.4) 

 mm; of 21 from southeastern and Peninsular Siam, 76-85 (81.7) mm. 



The range of the form extends from southeastern Siam and prob- 

 ably Cambodia westward through southern Siam to southern Ten- 

 asserim and southward through Peninsular Siam to the Malay States. 



There has been a good deal of controversy over this form, some 

 authors believing that it is only a black-throated race of 0. johnsoni, 

 but over the range given above no red-throated or partially red- 

 throated specimens are found, so far as Icnown, and it is my belief 

 that the latter is a distinct species confined to the eastern Siamese 

 plain. 



M Proc. Acad. Nat. Scl. Philadelphia, vol. 81, p. 540. 1930. 

 " Journ. Siam Soc. Nat. Hist. Suppl., vol. 8. p. 140, 1931. 

 " Proc. Acad. Nat. Sci. Philadelphia, vol. 86, p. 2C3, 1934. 



