534 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



tail coverts and the central pair of rectrices (greatly elongated and 

 narrowed on the terminal third) metallic peacock green, the remain- 

 ing rectrices blackish (some narrowly edged with metallic peacock 

 green) ; the remiges blackish brown, edged along the outer web with 

 rufescent olive-green; a long mustachial streak at each side of the 

 throat ' metallic blue ; the chin, throat, and entire breast bright 

 crimson; the remaining underparts yellowish olive-green. The 

 female has the entire upperparts olive-green (the edgings of the 

 remiges and the central pair of rectrices more rufescent) ; the entire 

 underparts yellowish olive-green; the rectrices indistinctly tipped 

 creamy white beneath. The juvenile male resembles the female but 

 has the chin and most of the throat crimson-pink. 



Delacour does not admit A. s. seheriae to the avifauna of Indo- 

 chine, although specimens from Haut-Laos and eastern Tongking 

 are of this race, as has been correctly reported long since by Bangs 

 and Van Tyne (Publ. Field Mus. Nat, Hist., zool. ser., vol. 18, No. 3, 

 1931, p. 115). 



AETHOPYGA SIPARAJA CARA Hume 



Tenasserimese Scarlet-throated Sunbird 



AE[thopyga] cara Hume, Stray Feathers, vol. 2, 1874, p. 473 (Tenasserim, 

 south of Moulmein ) . * 



AEthopyga cava, Gyldenstolpe, Kungl. Svenska Vet.-Akad. Handl., 1913, p. 42 

 (Ban Huai Horn) ; Journ. Nat. Hist. Soc. Siam, 1915, p. 171 (listed). 



AEthopyga siparaja cara, Gyldenstolpe, Ibis, 1920, p. 462 ("Northern districts"). 



AEthopyga siparaja seheriae, Riley, U. S. Nat. Mus. Bull. 172, 1938, p. 497 (Ban 

 Nam Khian). 



The Tenasserimese scarlet-throated sunbird is common in the low- 

 lands of Phrae and Nan Provinces; Gyldenstolpe has noted (1913) 

 that "near Bang Hue Horn it was the most common of all 

 Sun-birds . . ." 



Both Gyldenstolpe and I found it in second-growth evergreen and 

 at forest clearings, rather than in villages and towns. 



At Ban Huai Horn, Gyldenstolpe collected a male assuming the 

 first-nuptial plumage, February 23, and, the following day, a pair 

 with gonads greatly enlarged. I took a bird with enlarged testes 

 at Ban San Tha, April 1. A specimen from Ban Hai Huai Som, 

 June 20, wears full ju venal dress. 



From the full-plumaged male of seheriae, that of cara differs in 

 having the feathers of the hindcrown and nape broadly tipped with 

 deep crimson and the brownish-olive color absent or reduced to a 

 narrow subterminal band ; the central pair of tail feathers but slightly 

 elongated and scarcely narrowed toward the tip ; the visible portions 

 of the rectrices glossed wholly or in part with metallic peacock blue 

 rather than metallic peacock green; the abdomen and under tail 



