BIRDS FROM SIAM AND THE MALAY PENINSULA 443 



is not a form of inornata at all, but of Prinia blythi of Java, which 

 should not be in the same form group. The latter is a larger and 

 much darker bird above than P. i. inornata, with a much more 

 pronounced superciliary; the subterminal dark spot on the outer tail 

 feathers is larger and darker. The bill in blythi is longer than in P. i. 

 inornata and not so straight; the feet in the former are larger and 

 heavier. 



P. b. herberti is dark above like blythi and has the same long bill 

 and strong feet; the principal difference is the smaller size of herberti. 

 The latter is more of a grayish brown above, however, not quite so 

 russet. The base of the bill is light colored in the skin, only the tip 

 black. 



Six males of P. b. herberti measure: Wing, 47.5-55 (51.3); tail, 

 52-70 (58.9); culmen, 12-13 (12.6) mm. Five females: Wing, 

 45-54.5 (49.9); tail, 53-61 (55.4); culmen, 11.5-12.5 (12) mm. 



This form was first recorded by Williamson ^^ from Bangkok as 

 Prinia blanjordi. Baker ^^ in commenting on his types from Bangkok 

 and Samkok adds Pak Chong, eastern Siam. Herbert ^^ found it 

 very common in the vicinity of Bangkok and states that it has a 

 long breeding season, extending from April to October, though the 

 latter part of May to the end of September is the regular season; 

 he describes the nest and eggs. De Schauensee ^^ took a male at 

 Tap Chang, February 28. 



So far as known at present, this form is known only from southern 

 and eastern Siam to Cambodia, Laos, Cochinchina, and Annam. 



PRINIA EXTER Thayer and Bangs 



Prinia inornata exier Thayer and Bangs, Mem. Mus. Comp. Zool., vol. 40, 

 no. 4, p. 182, pi. 5, figs. 4, 5, 1912 (Hokow, Szechwan). 



One male. Nan, April 13, 1930. 



This is the first record of this warbler for Siam. Hitherto it has 

 been found only in western Szechwan and Yunnan. In either sum- 

 mer or winter plumage it is so different from Prinia inornata that in 

 my opinion it should not be placed in the same form group. 



The United States National Museum possesses a fair series of this 

 species in both summer and winter plumage from western Szechwan. 

 The above Siamese male matches the summer plumage perfectly. 

 To aid students in recognizing this species, a brief description is 

 given: 



Summer plumage: Above light brownish olive, slightly darker on 

 the head; below buffy white, the belly deep colonial buff; a light 

 buffy superciliary; auriculars mixed buffy and light brownish olive; 



" Journ. Nat. Uist. Soc. Siam, vol. 1, p. 88, 1914. 



«' Journ. Nat. Hist. Soc. Siam, vol. 3, p. 203, 1919. 



"Journ. Nat. Hist. Soc. Siam, vol. 6, p. 105, 1923. 



«• Proc. Acad. Nat. Sci. Philadelphia, vol. 86, p. 231, 1934. 



