THE BIRDS OF NORTHERN THAILAND 435 



the underparts shining green (rather paler than the mantle but with 

 a similar coppery sheen), more or less strongly suffused with blue on 

 the chin, upper throat, and center of the abdomen. The adult female 

 seems to differ chiefly in having most of the pale blue in the wing 

 replaced by a curious brownish-green color. The juvenile has the 

 feathers of the forehead and crown bluish white with a black sub- 

 terminal bar and light blue tip ; a broad supercilium and narrow nuchal 

 collar connected with it black ; the feathers of the sides of the neck 

 white tipped with black; the wings and tail as in the adult of cor- 

 responding sex; the rest of the plumage rufous-buff, each feather 

 broadly tipped with black. 



COCHOA PURPUREA Hodgson 



Purple Cochoa 



Cochoa purpurea Hodgson, Journ. Asiat. Soc. Bengal, vol. 5, 1836, p. 359 (Nepal). 

 Cochoa purpurea, Green way, Bull. Mus. Comp. Zool., 1940, p. 182 (Doi Saket 

 [Doi Lan]). 



The purple cochoa seems to be an extremely rare bird in Thailand, 

 until now known by only two records : An adult female collected by the 

 Asiatic Primate Expedition at Doi Saket, 1,280 feet, February 23, 

 1937 ; an adult female taken by me on Doi Suthep, 3,300 feet, March 

 23, 1937. 



I have noted that my specimen had the naked skin behind the eye 

 of "exactly the same color as the feathers of the crown." 



I have never seen a male of this form, and copy the following de- 

 scription from Stuart Baker (Fauna of British India, Birds, ed. 2) : 

 "Lores, a narrow line next the bill, supercilium, sides of head and a 

 narrow line round the crown black ; crown lavender-blue ; wing-coverts 

 and bars of secondaries lavender-purple ; primary-coverts black ; first 

 two primaries all black; other primaries with a patch of lavender- 

 grey on the base of the outer webs; tips of secondaries black; tail 

 lavender-purple with a black tip; remainder of plumage brownish 

 purple, darkest on the throat and breast." The adult female differs 

 chiefly in having the purple portions of the plumage and most of the 

 lavender in the wings replaced by rufescent-brown above, brownish 

 rufous below. 



Family MUSCICAPIDAE 



MUSCICAPA SIBIRICA SIBIRICA Gmelin 



Siberian Sooty Flycatcher 



[Muscicapa] sibirica Gmelin, Systema naturae, vol. 1, pt. 2, 1789, pp. 936-937 

 ("circa lacum Baikal, et in orientali Sibiria ad Camtschatcam usque"). 



Hemichelidon sibirica sibirica, Riley, U. S. Nat. Mus. Bull. 172, 1938, p. 444 (Doi 

 Hua Mot). 



