BIRDS FRO]\t SIAM AND THE MALAY PENINSULA 381 



The species was described from the southern Shan States, Burma. 

 The range has since been expanded to east central Burma and north- 

 ern Siam. It seems to be a shy mountain species. 



IXOS HILDEBRANOI (Hnme) 



Hemixus hildebrandi Hume, Stray Feathers, vol. 2, p. 508, 1874 (Youngzaleen 

 River, Salween District, Teiiasserim) . 



One male, Kao Lem, December 26, 1930; one male, Pang Meton, 

 Doi Nangka, May 2, 1931 ; one male, Klmn Tan, 4,000 feet, February 

 15, 1932; one male, Doi liua Mot, August 13, 1934. 



The United States National Museum has a pair from Phong Saly, 

 Laos, that seem to agree with the above Siamese birds, 



Ixos hildebrandi ranges from the Salween and Karen Hills north 

 into northern Siam and eastward into Laos. 



Williamson *^ records it from Muang Wang, northern Siam. De 

 Schauensee ^* collected a series at Chiengdao and says it appeared 

 very irregularly but that when it did occur it was in large flocks. 

 Deignan ^* recorded it from Doi Sutep, 2,700-3,500 feet, under the 

 name Pycnonotus hainanus. 



Ixos Jlavala of the Himalayas has the pileum gray, while in hilde- 

 brandi it is black. Ixos davisoni has the pileum brown and the back 

 a lighter brown. /. Jlavala and /. hildebrandi have gray backs. So 

 far as known, the three do not intergrade and are sufficiently distinct 

 to stand as species. 



IXOS MACCLELLANDI TICKELU (BIyth) 



Hypsipetes tickelli Bltth, Journ. Asiat. Soc. Bengal, vol. 24, p. 275, 1855 (interior 

 of Tenasserim). 



Two males, Doi Angka, 7,000 feet, December 6, 1928; one male, 

 lOiun Tan, August 24, 1930; two males, Doi Hua Mot, August 23, 

 September 1, 1934. 



De Schauensee '^'^ found it common on Doi Sutep, 4,500 feet; 

 Deignan " gives it from the same mountain from 2,700 to 5,500 feet. 

 Aagaard also took it there at 4,600 to 5,500 feet; ^^ Chasen and Kloss 

 also record it from the Raheng District.^^ De Schauensee ^^ on his 

 third expedition took a series at Chiengmai and Chiengdao. 



The form occurs from Karenni and the hills of east-central Burma 

 to Muleyit, Tenasserim, and western and northern Siam. 



M Journ. Nat. Hist. Soc. Siam, vol. 3, p. 19, 1918. 



" Proc. Acad. Nat. Sci. Philadelphia, vol. 86, p. 202, 1934. 



"Journ. Siam Soc. Nat. Hi.st. Suppl., vol. 8, p. 141, 1931. 



" Proc. Acad. Nat. Sci. Philadelphia, vol. 81, p. 539, 1930. 



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



'* Chasen and Kloss, Journ. Siam Soc. Nat. Hist. Suppl., vol. 8, p. 242, 1932. 



M Journ. Siam Soc. Nat. Hist. Suppl. vol. 7, p. 174, 1928. 



'» Proc. Acad. Nat. Sci. Philadelphia, vol. 86, p. 202, 1934. 



.33527—38 25 



