426 BULLETIN 17 2, UNITED STATES NATIONAL MUSEUM 



Trang in which the upperparts become olive-brown, the forehead and 

 superciUaries chestnut, the lowerparts cream-buff, the middle of the 

 breast and belly white, the tail with more rufescent along the edges. 

 The next stage is represented by a bird from Linga Island, taken 

 July 20, which is much like the last except the whole pileum has 

 become chestnut. The first fall plumage is like that of the adult but 

 darker on the back and has a subterminal black bar on the central 

 tail feathers and fuscous along the shaft. The two males collected 

 by Dr. Smith have no black on the central tail feathers, but the female 

 has. 



If we may judge from the immature birds described above, there 

 are no male adult specimens in the United States National Museum 

 at present from Sumatra or the Rliio Archipelago except the type. 

 The specimens from there are darker above than the adults collected 

 by Dr. Smith, but this I believe is the result of their being not fully 

 mature. The type of hesperius is in worn plumage, and this may 

 account for its darker color. It is quite possible, though, that the 

 mainland specimens may represent a different form. 



The form ranges from southern Tenasserim south through Peninsu- 

 lar Siam to Singapore, Sumatra, and the Rliio Arcliipelago. 



In Peninsular Siam there are few records ; it seems to be commoner 

 farther south. 



Robinson and Kloss ^^ record it from Chong, Trang; Robinson*^ 

 from near Ban Kok Klap, Bandon; Baker *^ from Maprit; Robinson 

 and Kloss *° from Tasan, Chumporn. The last seem to be the most 

 northern record for Siam. 



A closely related form, 0. s. sericeus Temminck, occurs in Borneo. 



ORTHOTOMUS RUFICEPS RUFICEPS (Lesson) 



Edela ruficeps Lesson, Traits d'ornithologie, p. 309, 1831 (Australia, error: 



Malacca) . 

 Orthoiomus cineraceus Blyth, 1845, and authors. 



Two males, Nakon Sritamarat, September 16, 21, 1926. 



These are the only two mainland specimens of this form examined 

 by me. 



This has been generally given as a race of Orthoiomus sepium of 

 Java, but that species is deep olive above, instead of gray, and yellow- 

 ish below, only the forencck gray. 0. r. ruficeps also is said to occur 

 in Java,*^ but this would hardly be the case if they were races. 



Williamson has a female in his collection also from Nakon Srita- 

 marat, taken November 23, which Robinson and Kloss state is the 



" Ibis, 1911, p. 66. 



<9 Journ. FedRrated Malay States Mus., vol. r., p. 108, 1915. 



« Journ Nat. Hist. Soc. Siam, vol. 3, p. 200, 1919. 



M Journ. Nat. Uist. Soc. Siam, vol. 5, p. 321, 1921. 



" Bartels and Stresemann, Trcubia, vol. 11, p. 133, 1929; Kuroda, Birds of Java, vol. 1, p. 244, 1933. 



