364 BULLETIN 18 6, UNITED STATES NATIONAL MUSEUM 



This evidently rare form is known as a Thai bird by only two ex- 

 amples from Doi Ang Ka : an adult female collected by me at about 

 6,000 feet, April 24, 1931, and an adult male taken by Griswold (Asiatic 

 Primate Expedition) at the summit of the mountain, April 1, 1937. 



My specimen was one of a pair feeding quietly in a dense thicket 

 of grass, briers, and low shrubs at an old clearing. The bill, feet, and 

 some of the feathers were stained with the purple juice of a berry. 



The female had the irides light brown ; the bill slaty gray ; the feet, 

 toes, and claws horny plumbeous. Griswold has noted that his male 

 had the irides chestnut; the bill, feet, and toes gray. 



The adult of either sex has the upperparts dull olivaceous-brown, 

 the feathers of the crown (and especially of the forehead) suffused 

 with rufous, those of the mantle faintly and narrowly barred darker ; 

 the primary coverts black; the primaries and outer secondaries with 

 the outer web basally rufous, apically ashy, and barred with black 

 throughout, the inner web black, broadly margined with rufous-buff 

 along the basal half; the inner secondaries regularly barred with 

 ashy olivaceous-brown and black and narrowly tipped with white; 

 the strongly graduated rectrices olivaceous-brown, suffused with ru- 

 fous toward the base, all narrowly but distinctly barred throughout 

 with blackish and tipped with white ; a conspicuous eye ring of white 

 feathers; the sides of the head and neck brownish ashy; the under- 

 parts ochraceous-buff, cinerescent on the center of the abdomen. 



Specimens from Laos, listed (L'Oiseau et la Revue Franchise 

 d'Ornithologie, 1940, p. 185) by Delacour and Jabouille as of this 

 race, are really almost exactly intermediate between rwmsayi and 

 yunnanensis ; they should perhaps be called radcliffei. 



HETEROPHASIA PICAOIDES CANA (Riley) 



Indo-Chinese Long-tailed Sibia 



Sibia picaoides cana, Riley, Proc. Biol. Soc. Washington, vol. 42, 1929, p. 166 



(Doi Ang Ka, North Thailand). 

 Sibia picaoides cana, db Schauensee, Proc. Acad. Nat. Sci. Philadelphia, 1929, 



p. 533 (Doi Suthep). 

 Hetero-phasia picaoides cana, Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1931, 



p. 138 (Doi Suthep). — Chasen and Boden Kloss, Journ. Siam Soc. Nat. Hist. 



Suppl., 1932, p. 244 (Doi Suthep).— Deignan, Journ. Siam Soc. Nat. Hist. 



Suppl., 1936, p. 107 (Doi Suthep).— Riley, U. S. Nat. Mus. Bull. 172, 1938, p. 



356 (Doi Ang Ka, Doi Suthep, Doi Langka, Doi Hua Mot). 

 Heterophasa picaoides cana, de Schauensee, Proc. Acad. Nat. Sci. Philadelphia, 



1934, p. 194 (Doi Suthep). 



The range of the long-tailed sibia in northern Thailand is restricted 

 to those peaks that have evergreen forest at altitudes in excess of 

 4,500 feet; the species occurs from that elevation to about 7,500 feet 

 (Doi Ang Ka). It is common on Phu Kha but is unknown from Doi 



