368 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



SIVA STRIGULA CASTANICAUDA Hume 



Tenasserimese Chestnut-tailed Siva 



Siva castanicauda Hume, Stray Feathers, vol. 5, 1877, p. 100 (Mount Muleyit, 



Tenasserim ) . 

 Siv<i strigula castanicauda, Rogers and Deignan, Proc. Biol. Soc. Washington, 



1934, p. 91 (Doi Ang Ka) — Riley, U. S. Nat. Mus. Bull. 172, 1938, p. 358 (Doi 



AngKa). 

 Siva strigula castaneicauda, Greenway, Bull. Mus. Comp. Zool., 1940, p. 173 (Doi 



Ang Ka). 



This siva is rather common in the low trees which surround the 

 sphagnum bog at the summit of Doi Ang Ka (8,400 feet, once at 8,000 

 feet ) , but it has not yet been recorded from any other locality in our 

 provinces. 



I found it in small flocks in the almost impenetrable thickets of 

 arboreous rhododendrons, quietly feeding and acting much like the 

 blue-winged siva. 



Greenway (lac. tit.) lists a juvenile taken sometime between March 

 22 and 31. An example of December 5 has not quite completed post- 

 nuptial molt. 



An adult male had the irides brown ; the maxilla blackish brown ; the 

 mandible dark brown, with the basal half fleshy; the tarsi horny 

 plumbeous ; the toes slaty ; the claws brown. 



It has the crown dull rufous-orange, suffused with olivaceous, grad- 

 ually changing at the nape to the grayish olive of the mantle ; the pri- 

 mary coverts black; the remiges black, the outer primaries with the 

 outer web narrowly edged bright yellow, the inner ones similarly 

 edged but bright orange toward the base, the outer secondaries edged 

 bright orange and tipped with white, the inner ones similarly tipped 

 but without orange and with the basal half of the outer web ashy gray ; 

 the two central pairs of rectrices largely chestnut, otherwise black, and 

 tipped with yellowish white, the others black with an outwardly in- 

 creasingly broad yellow tip (the outermost pairs with the outer web 

 also largely bright yellow) ; the chin bright yellow ; the throat white, 

 with crescent-shaped cross bars formed by the narrow black tips and ex- 

 posed dark bases of the feathers; an indistinct black mustachial streak 

 separating the grayish-olive ear coverts from the chin and throat ; the 

 remaining underparts yellow, suffused with olivaceous on the breast 

 and flanks. 



SIVA CYANOUROPTERA SORDIDA Hume 



Tenasserimese Blue-winged Siva 



Siva sordida Hume, Stray Feathers, vol. 5, 1877, pp. 104-105 (Mount Muleyit, 



Tenasserim). 

 Siva cyanuroptera oatesi, de Schauensee, Proc. Acad. Nat. Sci. Philadelphia, 



1929, p. 535 (Doi Suthep) ; 1934, p. 196 (Doi Suthep, Doi Chiang Dao). 



