THE BIRDS OF NORTHERN THAILAND 347 



The khatya is restricted to the evergreen on our highest peaks 

 and seems to be a bird of considerable rarity in Thailand : it has been 

 collected only three times on Doi Suthep, 5,500 feet (five specimens) ; 

 once on Doi Aug Ka, 7,400 feet (two specimens) ; twice on Doi Langka 

 (five specimens, four of them taken on the same day). 



At the summit of Suthep, all examples have been found eating berries 

 on low trees at the edge of the bungalow clearing, accompanied by 

 bulbuls and other frugivores. 



Four adults from Doi Langka, November 6, are in postnuptial molt. 



An adult male had the irides red-brown; the bill black, plumbeous- 

 blue at the base of the mandible; the feet and toes intense yellow; 

 the claws yellowish horn. 



The male has the forehead and crown slaty blue ; the lores and the 

 sides of the head and neck glossy black, this color crossing the nape 

 to form a narrow collar; the scapulars, back, rump, and very long 

 upper tail coverts rufous-chestnut (the scapulars often fading to a 

 dull rufous) ; the wing coverts glossy black; the remiges largely black 

 but with slaty blue along the outer web, white near the base of the 

 inner web, and minutely tipped white; the rectrices with the apical 

 half black, the basal half slaty blue suffused with rufous-chestnut; 

 a minute tuft of black feathers on the extreme base of the mandible ; 

 the remaining underparts white, boldly barred with black on the 

 sides of the breast and along the flanks, and everywhere suffused with 

 buff (this color soon disappearing from the throat and breast after 

 death). The female differs in having the black on the sides of the 

 head replaced by brown ; the scapulars and back rufous with conspic- 

 uous, elongated black spots, instead of uniform rufous-chestnut. 



pteruthius aenobarbus intermedius (hume) 

 Tenasserimese Chestnut-fronted Shrike Babbler 



Allotrius intermedins Hume, Stray Feathers, vol. 5, 1877, p. 112 ( "Central Tenas- 



serim Hills" ; type specimen from Mount Muleyit, fide Hume, ibid., vol. 6, 



1878, p. 370). 

 Pteruthius aenobarbus intermedins, Detgnan, Journ. Siam Soc. Nat. Hist. Suppl., 



1931, p. 175 (Doi Suthep) ; 1936, p. 10S (Doi Suthep).— de Schauensee, Proe. 



Acad. Nat. Sci. Philadelphia, 1934, p. 197 (Doi Suthep) .—Riley, U. S. Nat. 



Mus. Bull. 172, 1938, p. 363 (Doi Khun Tan, Doi Langka, Doi Hua Mot). 



With the addition of Doi Nang Kaeo, this pretty bird is recorded 

 only from the mountains named above, on all of which it seems to be 

 rare or uncommon and restricted to a zone between 4,400 and 5,500 

 feet. 



On Doi Suthep I saw it occasionally, singly or in pairs (often in the 

 same flock with Siva spp.), in the lower branches of the trees at the 

 edge of the evergreen or in the open hill-forest, acting much like a 

 white-browed shrike babbler. 



5S313C — 45 23 



