THE BIRDS OF NORTHERN THAILAND 533 



cent, this color passing into the greenish yellow of the remaining 

 underparts. The juvenile male is like the adult female but has merely 

 a rufescent wash over the throat and breast; from him the juvenile 

 female differs in having the entire underparts dull olive-yellow. 



Chalcoparia s. assamensis is nearest G. s. interposita, differing in 

 having the rather paler ferruginous of throat and breast usually not 

 extending so far onto the lower breast and the remaining underparts 

 a rather purer, less greenish, yellow. C. s. koratensis is a very distinct 

 form, in which the deep ferruginous breast is sharply defined from 

 the almost pure yellow abdomen. 



AETHOPYGA SIPARAJA SEHERIAE (Tickell) 



Indian Scarlet-throated Sunbird 



Nectei'inia [sic] Seheriae Tickeix, Journ. Asiat. Soc. Bengal, vol. 2, 1833, p. 577 



(Seheria, Borabham). 

 AEtlwpyga siparaja, Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1931, p. 155 



(Chiang Mai). 

 AEthopyga siparaja seheriae, Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1936, 



p. 124 (Chiang Mai). 



I found this lovely sunbird to be rather rare in the town of Chiang 

 Mai between November 30 (1936) and June 29 (1929) and apparently 

 quite absent at other seasons; it is otherwise known from our area 

 by a specimen taken at Muang Fang, July 9, 1936, and a small series 

 collected at Wiang Pa Pao between July 27 and August 3, 1935. 



Owing to its small size and its habit of keeping to the tops of the 

 trees in shady fruit gardens, the present form is probably often over- 

 looked, especially since its only note seems to be a shrill tsit, tsit. 

 My eight examples from Chiang Mai were all brought me by small 

 boys. 



The gonads were slightly enlarged in a bird of February 23, more 

 enlarged in one of March 9, and greatly enlarged in a third of May 

 15. A male in full juvenal dress was shot at Wiang Pa Pao, July 

 30 ; four others taken at Chiang Mai between November 30 and March 

 16 show progressive stages of the complete molt from juvenal to first- 

 nuptial plumage. 



A breeding male had the irides brown ; the maxilla blackish brown ; 

 the mandible light brown ; the feet and toes brown ; the claws horny 

 brown. 



The adult male has the front and most of the crown metallic 

 peacock green (sometimes with violet reflections) ; the extreme hind- 

 crown and the nape brownish olive; the sides of the head and neck, 

 the back, scapulars, lesser and median wing coverts deep crimson; 

 the rump golden-yellow, more or less concealed by long brownish- 

 olive feathers growing from the sides of the lower back; the upper 



