BIRDS FROM SIAM AND THE IMALAY PENINSULA 65 



Iris dark browTi; bill dark horn brown, greenish beneath at the tip, 

 dull red at base; orbital skin dull red; feet greenish yellow or pale 

 green. The male from Sichol has the chestnut chest band reduced 

 and lighter in color and the back lighter. There are some other slight 

 differences when compared mth Trang females, but these may be 

 individual. 



This form occurs from the lower part of the Malay Peninsula north 

 through Peninsular Siam to southern Tenasserim. It has been col- 

 lected from as far north as Maprit and Klong Bang Lai in south- 

 western Siam.^ 



One female from Borneo is much darker above aiid below, with 

 fev/er spots on the throat, than any mainland specimen examined by 

 me and represents the race Tropicoperdix charltoni graydoni (Sharpe 

 and Chubb). 



A related form, Tropicoperdix charltoni tonkinensis Delacour, occurs 

 in northeastern Tonkin and North Annam. 



TROPICOPERDIX CHLOROPUS OLIVACEA Delacour and Jabouille 



Tropicoperdix chloropus olivacea Delacour and Jabouille, Bull. Brit. Orn. Club, 

 vol. 48, p. 129, 1928 (Nap6, Laos). 



One male and one female, Khun Tan, September 1, 1930, February 

 18, 1932; one male, ^.lelang Valley, Decem.ber 31, 1932; one adult 

 male and one immature male, Hin Lap, December 9, 1931 ; one female, 

 Kao Lem, December 29, 1930; one female, Nong Khor, February 12, 

 1927; one male, Kao Bantad, Krat, December 22, 1929; five males and 

 two females, Kao Sabap, November 8-21, 1933; one male and one 

 female, Lamton Lang, May 27, 28, 1934. Dr. Smith took three eggs 

 at Muek Lek, April 26, 1933, apparently belonging to this form. 

 They are rounded-ovate, olive-buft', and measure 36 by 29.4, 36 by 

 28.7, and 35.4 by 29.4 mm. 



The above series of skins agrees fairly well w^ith a topotypical male 

 of the form. 



De Schauensee ^^ took three specimens at Chiengsen ; and on his 

 third trip to the country he collected a pair at Chantabun; he also 

 assigns a male from Chiengmai, 4,500 feet, to T. c. chloropus ^^ but 

 the three specimens from northern Siam (Khun Tan and Melong 

 Valley) in Dr. Smith's series do not differ appreciably from south- 

 eastern Siam specimens, and it is my opinion that T. c. chloropus is 

 confined to the western and southwestern part of the country, as far 

 as Siam is concerned. 



T. c. olivacea apparently ranges from northern and southeastern 

 Siam to Cambodia and Laos. 



M Baker, Journ. Nat. Hist. Soc. Siam, vol. 4, p. 35, 1920. 

 •» Proc. Acad. Nat. Sei. Philadelphia, vol. 81, p. 583, 1930. 

 M Proc. Acad. Nat. Sei. Philadelphia, vol. 86, p. 576, 1934. 



