BIRDS FROM SIAM AND THE MALAY PENINSULA 461 



30, 1933; one male, Tha Lo, Bandon, September 17, 1931; two males, 

 Pran, May 29, 192S, April 2, 1931 ; one male and one female, Bangkok, 

 February 4, 1924, December 28, 1925; three males and one female, 

 Nong Klior, near Sriracha, Septem.ber 25, 26, 1925, February 7, 1927; 

 one male, Ban Sadet, Sriracha, June 1, 1925; two males, Kao Seming, 

 Krat, October 15 and 16, 1928; three males, Kao Sabap, November 1 

 and 14, 1933; two males, Koh Chang, March 31, 1924, January 6, 

 1926; two males, Koh Kut, May 20, 23, 1929; three males, Nong 

 Yang October 20, November 16, 1931; one male. Ban Ta Yai, July 9, 

 1928. 



Dr. W. L. Abbott collected four males and five females, Trang 

 (Lay Song Hong, August 26 and September 9 and 17, 1896, January 

 2, 1897; Prahmon, February 22, 1896, Telibon Island, February 29, 

 1896; Trang, January 27, 1897, and Januaiy 1, 26, 1899); one female, 

 Pulo Langkam, December 8, 1899; one male, Dungun River, Treng- 

 ganu, September 22, 1900. 



After considerable study, I have reached the conclusion that the 

 present form extends from the Malay States up Peninsular Siam and 

 around the coast of southern Siam to southeastern Siam and probably 

 over into southern Indo-China. 



H. a. prophata is a darker, more purplish blue than the form from 

 eastern and northern Siam, the breast and belly with more of a bluish 

 wash, not so extensively white and the light tips to the tail feathers 

 much reduced or sometimes absent. The birds from southeastern 

 and southern Siam are a lighter blue than Peninsular specimens, 

 with more wdiite on the belly and the white tips to the tail feathers a 

 little more pronounced. In other words, they are more or less inter- 

 mediate but are nearer prophata than siyani. 



There seems to be little if any difference in size. Twelve males 

 from Peninsular and southeastern Siam measure: Wing, 68-77 (72); 

 tail, 68-77 (70.7); culmen, 11-13 (12-3) mm. 



HYPOTHYMIS AZUREA STYANI (Hartlaub) 



Siphin siyani Hartlaub, Abh. Nat. Ver. Bremen, vol. 16, Heft 2, p. 248, 189^ 



(Hainan). 

 Hypothj/mis azurea monlana Eiley, Proc. Bio!. Soc. Washington, vol. 42, p. 165^ 



1929 (Chiengmai, Siam). 



Four males, Pak Chong, May 16, 1925, May 9, 1926, November 

 16, 19, 1929; five males. Lam Klong Lang, near Pak Chong, June 

 3-14, 1925; one male, Sikeu, near Korat, February 18, 1926; one male 

 and one female, Lat Bua Kao, August 7, 1929; three males, Hin Lap, 

 December 9, 11, 1931, September 30, 1932; one female, Knong Phra, 

 April 11, 1929; one female, Lampang, November 15, 1928; one male, 

 Cliiengmai, November 25, 1928; one female, Ban Nam Kien, Nan^ 



33527—38 30 



