THE BIRDS OF NORTHERN THAILAND 551 



If I be correct in calling Malayan birds modestum, then a series of 

 eight from Assam must be separated as a new subspecies ; they differ 

 in their longer wing, lighter bill, brighter and greener upperparts, and 

 creamier underparts. 



P. a. pallescens (of which I have 13 specimens, including the type) 

 inhabits eastern and southeastern Thailand and the southern half of 

 Indochine. It has the underparts whiter, less creamy, than any other 

 race seen and the color of the upperparts intermediate between the 

 bright olive-green of Assamese birds and the dark brownish olive- 

 green of Malayan, with an ashy cast over the head and mantle. 



PACHYGLOSSA MELANOZANTHA Blyth 



Yellow-bellied Flowerpecker 



P[(whyglossa] melanozantha "Hodgson" Blyth, Journ. Asiat. Soc. Bengal, vol. 



12, 1843, p. 1010 (Nepal). 

 Pachyglossa melanoxantha, de Schauensee, Proc. Acad. Nat. Sei. Philadelphia, 



1934, pp. 4, 244 (Doi Chiang Dao). 



A female and an unsexed specimen, collected by de Schauensee on 

 Doi Chiang Dao, 4,500 and 5,000 feet, January 13 and 22, 1933, are 

 the only examples of the yellow-bellied flowerpecker yet known from 

 Thailand. It is probably only a winter visitor. 



The male of this comparatively large species ha§ the entire upper- 

 parts, the sides of the head, throat, and neck and the greater part of 

 the breast deep slate; the remiges and rectrices blackish, the two 

 outermost pairs of the latter with large, subterminal white patches 

 on the inner web ; the chin and center of the throat and breast white ; 

 the remaining underparts bright yellow ; the under wing coverts and 

 axillaries white. The female has the upperparts dark olivaceous- 

 gray; the wings and tail as in the male; the sides of the head, throat, 

 and neck and the greater part of the breast olivaceous-ashy ; the chin 

 and center of the throat and breast ashy white ; the remaining under- 

 parts yellow, overlaid with olivaceous along the flanks and sides of 

 the abdomen ; the under wing coverts and axillaries white. 



Family ZOSTEROPIDAE 



ZOSTEROPS ERYTHROPLEURA Swinhoe 



Chestnut-flanked White-eye 



Zlosterops] erythropleurus Swinhoe [nomen nudum], Ibis, July 1SG3, p. 294 



("N. China"). 

 Zosterops erythropleura Swinhoe, Proc. Zool. Soc. London, Aug. 1SG3, pp. 204, 



298 (Shanghai, China). 

 Zosterops erythropleurus erythropleurus, de Schauensee, Proc. Acad. Nat. Sci. 



Philadelphia, 1929, p. 562 (Doi Suthep).— Deignan, Journ. Siam Soc. Nat. 



Hist. Suppl., 1931, p. 154 (Doi Suthep). 



