BIRDS FROM SIAM AND THE MALAY PENINSULA 425 



September 30, 1932; one female, Ban Sadet, Sriracha, May 31, 1925; 

 one male, Huey Yang, Sriracha, no date; one male, Lem Sing Moun- 

 tain, Sriracha, June 8, 1926; one male, Kao Seming, Krat, October 10, 

 1928. Dr. Smith also took two females at Vientiane, Laos, February 

 20, 23, 1929. 



Herbert ** reports four nests found in the Bansakai fruit gardens in 

 June and July, the nest and eggs similar to those of 0. sutorius maculi- 

 collis; the note is quite different, however. 



Stuart Baker *^ states that the young of 0. a. atrogularis is like the 

 female, but young birds of 0. a. nitidus from Ban Sadet and Aranya 

 have the pileum green like the back and are wliiter below. The Ban 

 Sadet specimen was taken May 31 and is over half grown; that from 

 Aranya, taken July 12, is considerably older and there are a few 

 cinnamon-rufous feathers coming in on the pileum. The Ban Sadet 

 date would indicate a much earher breeding date than those given 

 by Herbert. 



Kinnear ^^ would lump the Peninsular bird with that of nitidus, and 

 it must be admitted that there is not much difference between the two 

 forms, but as the northern birds show some differences I am keeping 

 them separate for the present. 



The range of 0. a. nitidus is Sikldm to eastern Assam, Burma, 

 northern Tenasserim, northern, western, and eastern Siam, and east- 

 ward into Laos, Cochinchina, Annam, and Tonldn. 



0. a. eum.elas Oberholser occurs in Banka and possibly Sumatra; 

 0. a. humphreysi Chasen and Kloss in northern Borneo. 



ORTHOTOMUS SERICEUS HESPERIUS Oberholser 



Orthotomus sericeus hesperius Oberholser, U. S. Nat. Mus. Bull. L59, p. 89,1932 



(Linga Island, Rhio Archipelago). 

 Orthotomus ruficeps Authors, not of Lesson. 



One male and one female, Buldt, Patani, January 25, 1931; one 

 male, Patalung, July 8, 1929. 



Dr. W. L. Abbott collected an immature male at Prahmon, Trang, 

 April 8, 1896, and an immature male on Singapore Island, May 20, 

 1899. 



The three specimens collected by Dr. Smith are adult, with mouse- 

 gray backs, the pileum and tail light chestnut. There are three 

 stages of the immature plumage represented in the series in the United 

 States National Museum. An immature from Linga Island, taken 

 July 22 (no. 170789), has the upperparts saccardo umber, the pileum 

 with a slight rufescent tinge; tail fuscous, becoming blackish sub- 

 terminally, with rufescent edges and tip; underparts primrose 

 yellow. The next stage is the immature collected by Dr. Abbott in 



" Journ. Nat. Hist. Soc. Siam, vol. 6, p. 99, 1923. 



" The fauna of British India, Birds, ed. 2, vol. 2, p. 414, 1924. 



« Ibis, 1921, p. 321. 



