434 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



gins and central streaks; the under wing coverts blackish brown, 

 broadly tipped with buffy white; the axillaries buffy white, broadly 

 tipped with deep brown. The juvenile differs chiefly in having the 

 upperparts deep slaty brown (many of the feathers with buffy shaft 

 streaks) and the dark markings of the sides of head, neck, throat, and 

 breast almost black. 



The birds of all Thailand seem to belong to this southern race, which 

 is perhaps separable from marginata only by its rather shorter and 

 weaker bill. 



COCHOA VIRIDIS Hodgson 



Green Cochoa 



Co[choa~\ Viridis Hodgson, Journ. Asiat. Soc. Bengal, vol. 5, 1836, pp. 359-360 

 (Nepal). 



Cochoa viridis, Riley, Journ. Siam Soc. Nat. Hist. Snppl., 1933, p. 157 (Khun 

 Tan).— Deignan, Journ. Siain Soc. Nat. Hist. Suppl., 1936, p. 114 (Doi 

 Suthep). — de ScHAUENSEE, Proc. Acad. Nat. Sci. Philadelphia, 1934, p. 212 

 (Doi Suthep).— Riley, U. S. Nat. Mus. Bull. 172, 1938, p. 420 (Khun Tan). 



The green cochoa is a rare permanent resident of the higher moun- 

 tains of all our provinces, occurring in the evergreen from about 

 4,500 to 5,500 feet. In addition to the localities named above, it is 

 known from Doi Ang Ka and Phu Kha. 



At Doi Ang Ka, on the slopes of Pha Mon, I collected one from 

 the top of a tree in dry open hill-forest on the ridge between two moist 

 ravines, but all other specimens taken by me were found in dense ever- 

 green, watered by small streams. An example obtained by de 

 Schauensee was seen "flying out after insects from the top of a tall 

 tree." 



A bird from Doi Suthep, 5,400 feet, July 16, is in the initial stages of 

 postjuvenal molt, while Smith's specimens from Khun Tan, October 

 23 and 26, are nearing completion of this molt. 



An adult male had the irides brown ; the eyelids edged pinkish horn ; 

 the naked skin behind the eye pale pink; the interior of the mouth 

 pink ; the bill black ; the tarsi dark brown ; the toes and claws horny 

 brown ; the soles pale tan-yellow. 



The adult male has the lores and a narrow supercilium black; the 

 forehead, crown, and nape shining violet-blue ; the sides of the head and 

 neck (below and behind the eye) purple-blue; the upperparts shining 

 deep green (the feathers of the mantle often with indistinct black 

 shaft streaks and tips) , changing in certain lights to burnished copper ; 

 the central pair of rectrices violet-blue, broadly tipped with black, the 

 next four pairs similar but with the inner webs black, the outermost 

 pair all black ; most of the remiges and the greater and median coverts 

 black, each with the outer web pale blue toward the base to form two 

 conspicuous wing bands, the lesser coverts deep green with black tips ; 



