516 BULLETIN 17 2, UNITED STATES NATIONAI^ MUSEUM 



known range of D. h. beccarii is separated by several hundred miles 

 from D. h. cambodianum. They are both mountain forms, so far as 

 known, and much of the intervening country would be unsuitable. 



D. b. beccarii and D. b. cambodianum differ from D. ignipectum by 

 the absence of the scarlet chest patch in the male. The female is 

 described as resembling the same sex of D. ignipectum. but is grajdsh 

 blue-bronze above and a paler fawn color below. 



The range of D. b. cambodianum is the mountains of southeastern 

 Siam, the Plateau Bolovens, southern Laos, and southwestern 

 Cambodia. 



DICAEUM TRIGONOSTIGMUM TRIGONOSTIGMUM (Scopoli) 



Certhia trigonostigma Scopoli, Deliciae florae et faunae insubrica,e, pt. 2, p. 91, 

 1786 (China, error; Robinson and Kloss ^^ restrict it to Malacca). 



Two males and one female, Bangnara, Patani, July 19, 21, 1926. 



Dr. W. L. Abbott collected seven males and three females, Trang 

 (Prahmon, February 22 and April 5, 1896; Lay Song Hong, September 

 9, 1896; Chong, January 21, 1897; Kao Soi Dao, 1,000-1,500 feet, 

 February 9 and 15, 1899; Trang, February 15, 1897, January 6 and 

 21, 1899); one male, Singapore Island, May 2, 1899. 



The specimens from Trang seem to agree with birds from the south 

 better than they do with the next form to be considered (rubropygium) , 

 from Tenasserim. The northern limit of the southern race cannot 

 be much north of Trang, as a specimen from Bandon seems to belong 

 to the northern form. 



The present form evidently ranges from Sumatra and the Malay 

 States north in Peninsular Siam to Trang. 



A number of other named forms occur on the islands off the west 

 coast of Sumatra, Java, the Anamba Group, Natuna Islands, and 

 Borneo. In the Philippine Islands a number of closely related species 

 occur. 



DICAEUM TRIGONOSTIGMUM RUBROPYGIUM Baker 



Dicaeum trigonostigma rubropygium Baker, Bull. Brit. Orn. Club, vol. 41, p. 

 108, 1921 (Mergui). 



One male, Ban Ku'iwong, Nakon Sritamarat, July 10, 1928; one 

 male, Sichol, Bandon, September 5, 1929. 



Dr. W. L. Abbott collected three males in the Mergui Archipelago 

 (Chance Island, December 27, 1899; Bentinck Island, March 8, 1900). 



The males from the Mergui Archipelago have the breast and middle 

 of the back a deeper orange than those from Trang southward. 

 With the northern form I would place the male from Bandon listed 

 above. The male from Nakon Sritamarat is immature but assuming 

 the adult plumage which is near completion. 



83 Journ. Nat. Hist. Soc. Siam, vol. .% p. 383, 1924. 



