THE BIRDS OF NORTHERN THAILAND 535 



coverts gray, sometimes with the lightest wash of olive-green. 

 Females and juveniles of the two forms are probably inseparable. 



The birds of Nan and Phrae and the provinces of eastern Thailand 

 show no constant character by which they may be distinguished 

 from topotypical cava. 



AETHOPYGA SATURATA SANGUINIPECTUS Walden 



Indo-Chinese Black-throated Sunbird 



AEthopyga sanguinipectvs Walden, Ann. Mag. Nat. Hist., ser. 4, vol. 15, 1875, 

 pp. 400-^01 ("Tonghoo hills [Karen-hee]," error; type locality corrected 

 to "the Tonghoo and Karen-nee hills," by Wardlaw Ramsay, in The ornitho- 

 logical works of Arthur, Ninth Marquis of Tweeddale, 1881, p. 414). 



AEthopyga dabryi, Gyldenstolpe, Kungl. Svenska Vet.-Akad. Handl., 1916, p. 33 

 (Khun Tan) ; Ibis, 1920, p. 462 (Khun Tan). 



AEthopyga sanguinipectus, Williamson, Journ. Nat. Hist. Soc. Siam, 1918, p. 23 

 (Muang Wang). 



AEthopyga sanguinipectus [partim], Gyldenstolpe, Ibis, 1920, p. 462 (Muang 

 Wang) . 



AEthopyga sanguinipecta sanguinipecta, de Schauensee, Proc. Acad. Nat. Sci. 

 Philadelphia, 1929, p. 563 (Doi Suthep, Chiang Saen). — Deignan, Journ. 

 Siam Soc. Nat. Hist. Suppl., 1931, p. 155 (Doi Suthep). — Chasen and 

 Boden Kloss, Journ. Siam Soc. Nat. Hist. Suppl., 1932, p. 248 (Doi Suthep)'.— 

 Riley, U. S. Nat. Mus. Bull. 172, 1938, p. 499 (Doi Suthep, Doi Khun Tan, 

 Doi Langka, Doi Hua Mot). 



AEthopya saturata sanguinipecta, de Schauensee, Proc. Acad. Nat. Sci. Phila- 

 delphia, 1934, p. 241 (Doi Suthep, Doi Khun Tan, Doi Chiang Dao).— 

 Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1936, p. 124 (Doi Suthep). 



Aethopyga dabryii dabryii [partim], Riley, U. S. Nat. Mus. Bull. 172, 1938, 

 p. 498 (Khun Tan). 



On Phu Kha and on all the higher peaks of the Thanon Thong 

 Chai and Khun Tan ranges, the black-throated sunbird is a common 

 resident of the evergreen, at elevations between 3,300 and 5,500 feet. 

 Two males taken by de Schauensee at Chiang Saen, January 9 and 

 14, 1929, probably represent winter wanderers from the hills. 



This species keeps to the lower trees, in clearings or at the edge 

 of the forest, and especially those which are heavily laden with 

 blooming epiphytes. Like all of the genus, it flutters before the 

 flowers to probe into them for nectar and the minute insects entrapped 

 therein. 



A bird of April 27 (Doi Ang Ka) had the testes greatly enlarged. 

 Postnuptial molt is shown by examples collected between July 22 

 and September 8. 



Two males had the irides brown; the bill black; the feet and toes 

 dark brown ; the claws horny brown. 



The adult male has the front, crown, and nape metallic blue or 

 violet-blue ; the sides of the breast and neck, the back, and scapulars 

 deep crimson-maroon ; the rump with a narrow band of bright light 



