468 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



Abromis superciliaris superciliaris, Gyldenstolpe, Ibis, 1920, p. 575 (Khun 



Tan, Pha Kho, Mae Raem, Doi Pha Sakaeng). 

 Abroscopus superciliaris salwinensis, Deignan, Journ. Siam Soc. Nat. Hist. 



Suppl., 1931, p. 150 (Doi Suthep). 

 Abroscopus superciliaris superciliaris, Deignan, Journ. Siam Soc. Nat. Hist. 



Suppl., 1936, p. 117 (Doi Suthep).— Riley, U. S. Nat. Mus. Bull. 172, 1938, 



p. 438 (Khun Tan). 



The white-throated flycatcher warbler has been found in all the 

 northern provinces except Mae Hong Son, where it is almost certain 

 to occur. It is restricted in range to districts with extensive bamboo- 

 brakes but, at suitable places, is common from the level of the plains 

 to about 3,500 feet. The sole record for the vicinity of Chiang Mai is 

 a solitary bird observed by me on Doi Suthep, 3,500 feet, July 12, 1930 

 (in a clump of bamboo at the edge of the evergreen) ; on the lower 

 slopes of Doi Mon Khwam Long, the next mountain to the North, 

 where bamboo is plentiful, the species is almost abundant. 



Along small streams and trails through the bamboo forest, this is 

 a most lively and conspicuous little bird, taking its insect food on the 

 wing and, during the breeding season, constantly rendering a sweet, 

 but very shrill, whistled song. 



A specimen of August 29 (Ban Mae Mo) is in postjuvenal molt; 

 postnuptial molt is shown by another of July 20 (Doi Mon Khwam 

 Long). 



An adult male had the irides brown ; the bill black, with the base 

 of the mandible plumbeous; the feet, toes, and claws horn. 



The adult of either sex has the front and crown brownish gray ; the 

 remaining upperparts golden olive-green, with a narrow band of 

 yellow across the rump ; the lores and postocular streak slaty ; the 

 supercilium white; the chin and throat ashy white, changing on the 

 upper breast to the bright yellow of the remaining underparts. 



SEICERCUS CASTANICEPS COLLINSI Deignan 



Thai Chestnut-crowned Flycatcher Warbler 



Seicercus castaniceps collinsi Deignan, Proc. Biol. Soc. Washington, vol. 56, 



1943, pp. 29-30 (Doi Langka, Northern Thailand). 

 Seicercus castaneoceps castaneoceps, Riley, Journ. Siam Soc. Nat. Hist. Suppl., 



1933, p. 157 (Doi Langka). 

 Seicercus castaniceps castaniceps, Riley, U. S. Nat. Mus. Bull. 172, 1938, p. 438 



(Doi Langka). 



An adult male (the holotype of the race), collected by Smith on 

 Doi Langka, April 22, 1931, is the sole example of the species now 

 known from Thailand. Since I myself saw a small party on Doi Ang 

 Ka at 5,500 feet in April 1931, we may expect it to occur on yet others of 

 our higher peaks. 



