460 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



This pretty flycatcher is recorded in Thailand only from Doi Ang 

 Ka, 5,000-8,400 feet, and from Doi Chiang Dao at about 5,000 feet. 



In the Rhododmdra which fringe the sphagnum-bog at the summit 

 of Ang Ka, I found this to be the commonest bird in April and May 

 1931; at that season its weak but pleasing song was heard on every 

 side and it was probably breeding in the neighborhood. It is a most 

 active species, even when at rest constantly quivering the wings and 

 spreading the tail like a fan to exhibit the conspicuous white pattern. 



An adult female had the irides brown; the maxilla dark brown; 

 the mandible fleshy horn; the feet and toes fleshy yellow; the claws 

 horny. 



The adult male has the forehead and broad supercilium bright yel- 

 low ; the remaining upperparts dark olive-green, brighter on the crown 

 and nape and suffused with gray on the mantle ; the remiges and rec- 

 trices dull blackish, each of the latter with a pure white shaft streak 

 and all but the central pair with a broad, transverse white terminal 

 patch ; the lores and orbital region black, this colo rwashed with olive- 

 green on the ear coverts; the entire underparts bright yellow. The 

 adult female differs from the male only in having the lores and sides 

 of the head dull blackish, suffused with olive-green. 



RHIPIDURA AUREOLA BURMANICA (Hume) 



Burmese White-browed Fantail Flycatcher 



[Leucocerca] burmanica Hume, Stray Feathers, vol. 9, 1880, p. 175 (Thauugyin 

 valley, Tenasserini ) . 



I have 10 specimens of this flycatcher from six widely separated 

 localities in Mae Hong Son, Chiang Mai, and Phrae Provinces; it 

 seems to occur more frequently in Mae Hong Son, and east of the Khun 

 Tan chain it has been found only at Ban Mae Ten but, for the reason 

 discussed below, will probably eventually be shown to have a range in 

 our area exactly coincident with that of Tephrodornis pondiceriana 

 thai. 



The white-browed fantail, not hitherto recorded from the North, 

 was discovered to be a rare and local resident of our provinces in con- 

 sequence of my observation in central Thailand of a pair in company 

 with a band of the lesser wood-shrike. When, some six months later, a 

 flock of this wood-shrike was seen in Chiang Mai Province, a few 

 moments' search again disclosed the presence of a pair of fantails; 

 thereafter, all such parties were carefully scrutinized and so close did 

 the association prove to be (at least during the nonbreeding period) 

 that all my subsequent specimens of the flycatcher were obtained as a 

 direct result of it. 



This particular companionship seems not yet to have been con- 

 sciously noted elsewhere and may probably be explained as an opera- 



