THE BIRDS OF NORTHERN THAILAND 421 



At Chiang Mai, specimens with the gonads active have been col- 

 lected between February 25 and May 8, while examples in full juvenal 

 plumage have been taken there July 5. 



A juvenile female had the irides dark brown; the bill black; the 

 rictus and interior of the mouth light yellow ; the feet and toes slate ; 

 the claws horny slate. 



The adult male has the entire head and neck, breast, and mantle 

 glossy blue-black; the wings black, with a conspicuous, longitudinal 

 white stripe; the two central pairs of rectrices black, the next pair 

 white with a black margin along the inner web, the remaining pairs 

 pure white ; the underparts, below the breast, pure white. The adult 

 female differs only in having the upper half of the head and the 

 mantle blue-gray with a steely sheen; the chin, throat, and breast 

 deep ashy gray. The juvenile differs from the adults in having the 

 upperparts slaty brown ; the remiges outwardly edged with pale rufous 

 and the white of the coverts sullied with this color ; the third pair of 

 rectrices from the center with a black margin along both inner and 

 outer webs; the chin, throat, and breast rufous-buff, each feather 

 narrowly margined with blackish ; the white of the remaining under- 

 parts more or less washed with rufous-buff. 



Since the birds of nonpeninsular Thailand are intermediate between 

 musicus (Sumatra) and saularis (Bengal), with just the characters 

 attributed by Oberholser to his erimelas, this name may properly be 

 employed for them. 



In this species the amount of black on the rectrices gradually de- 

 creases from south to north and it is instructive to find that, at any 

 given latitude in Thailand, juveniles tend to have more black on these 

 feathers than their parents, thus seeming to belong with a more south- 

 ern population. 



KITTACINCLA MALABARICA INTERPOSITA Robinson and Boden Kloss 



Indo-Chinese Shama 



Kittacincla malabarica interposita Robinson and Boden Kloss, Journ. Federated 

 Malay States Mus., vol. 10, 1922, p. 262 (Daban, South Annani). 



Copsychus macrurus, Schombuegk, Ibis, 1864, p. 262 (Chiang Mai). 



Cittocincla macrura, Gyldenstolpe, Kungl. Svenska Vet.-Akad. Handl., 1913, p. 

 39 (Den Chai, Ban Huai Horn) ; Journ. Nat. Hist. Soc. Siam, 1915, p. 170 

 (listed). 



Kittocincla macrurus tricolor, Gyldenstolpe, Kungl. Svenska Vet.-Akad. Handl., 

 1916, p. 50 (Pha Kho, Khun Tan, Doi Pha Sakaeng). 



Kittacincla macrura tricolor, Gyxdenstolpe, Ibis, 1920, p. 477 ("Throughout 

 Siain"). 



Kittocincla malaoarica interposita, de Schauensee, Proc. Acad. Nat. Sci. Phila- 

 delphia, 1928, p. 564 (Chiang Mai) ; 1929, p. 543 (Chiang Mai, Doi Suthep). 



Kittacincla malaoarica interposita, Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 

 1931, p. 143 (Cbiang Mai, Doi Suthep) ; 1936, p. 112 (Chiang Mai, Doi Suthep). 



