BIRDS FKOM SIAM AND THE MALAY PENINSULA 313 



Ko specimens are available from Nei)al or Burma for comparison. 

 Count G^ldenstolpe," referring to northern Siamese specimens, says 

 they are somewhat intermediate between the Peninsular form and 

 that from India. Our measurements of the males seem to bear out 

 his remarks, the only difference between the tv/o forms being prin- 

 cipally one of size. Five males from northern Siam measure: Wing, 

 108-113 (110.2); tail, 90-93 (91.5); culmen, 13-14 5 (13.7) mm. 



The form extends from Nepal through Assam to Burma, northern 

 Siam, and Laos. It is said to be common locally in northern Siam. 



MELANOCIILORA SULTANEA FLAVOCRISTATA (Lafresnaye) 



Parus flavocrislatus Lafresnaye, Mag. Zool., CI. 2, pi. SO, 1837 (Isles de la Sonde). 



One male and one female. Waterfall, Trang, August 26, 1933; two 

 males and one female, Kao Soi Dao, Trang, December 21, 1933, 

 January 8, 1934; one male, Sichol, Bandon, September 1, 1929; one 

 male, Tha Lo, Bandon, September 15, 1931; one male and one female, 

 Pran, April 1, 1931 ; one immature male. Ban Nam Phu, February 25, 

 1934; one male. Pang Sok, August 25, 1920; three males and two 

 females, Pak Chong, November 16, 24, 1929; one male. Liken, near 

 Korat, February 18, 1926; two males, Nong Yang, November 9, 1931; 

 three males and one female, Lamton Lang, May 28-June 2, 1934. 



Dr. W. L. Abbott collected: three males, Trang (Lay Song Hong, 

 September 7, 1S96; Trang, January 3, 1899); and one male and one 

 female, Packa, Trengganu, September 27, 1900. 



Tills form gradually becomes larger from the Malay States north- 

 ward until it is rather difficult to draw a line between it and the 

 northern form, especially as Siamese specimens of the latter are some- 

 what intermediate. Specimens from southwestern and eastern Siam 

 seem to belong to the smaller Peninsular race. 



Ten males from Bandon (2), southwestern Siam (1), and eastern 

 Siam (7) measure: Wing, 102-109 (106.7); tail, 86.5-95 (90.4); 

 culmen, 13-14.5 (13.6) mm. Five males from Perak-Pahang border (1 ), 

 Trengganu (1), and Trang (3): Wing, 104-107.5 (105.7); tail, 82-87 

 (85.4); culmen, 13-14 (13.4) mm. 



The form ranges from Sumatra and the Malay States northward 

 through Peninsular Siam and southwestern Siam to eastern Siam. 



Family SITTIDAE: Nuthatches 



CALLISITTA FRONTALIS FRONTALIS (Swainson) 



Sitta frontalis Swainson, Zoological illustrations, ser. 1, pi. 2, 1820 (Ceylon). 



One male. Bo Ploi, Kanburi, September 6, 1929; one male, Doi 

 Angka, 4,000 feet, December 3, 1928; one male, Kumpawapi, February 



" Ibis. 1920, p. 468. 



