450 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



Muscicapula banyumas whitei, Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 

 1936, p. 119 (Doi Suthep). — Greenway, Bull. Mus. Comp. Zool., 1940, p. 

 183 (Doi Nang Kaeo). 



Cyornis whitei whitei, Riley, U. S. Nat. Mus. Bull. 172, 1938, p. 451 (Khun Tan, 

 Ban Mae Khan). 



The rufous-throated cyornis is a common permanent resident on 

 most of the hills of the provinces west of (and including) the Khun 

 Tan chain, at elevations between 2,100 and 4,600 feet; it occurs also 

 on the high peaks of northern Nan (Phu Kha). Between October 13 

 and February 27, odd specimens have been taken at numerous low- 

 land localities (Thattafang, Mae Khan, Chiang Mai [once], Ban Pang 

 An, Chiang Saen, etc.) ; such birds may be true migrants from farther 

 north but more probably are merely wanderers from the neighboring 

 hills. 



This flycatcher is found (usually in pairs) in tall bamboo jungle 

 and in the evergreen along streams. Its habits seem to be precisely 

 those of C. r. dialilaema and C. t. sumatrensis, and it is noteworthy 

 that, on Doi Khun Tan, where alone whitei is definitely known to dwell . 

 side by side with dialilaema, the former is a distinctly rare bird. 



A male from Phu Kha, April 4, had the gonads enlarged ; another 

 from Doi Suthep, March 5, had them greatly enlarged. 



A male had the irides brown; the bill black; the feet and toes 

 violet-gray ; the claws horn. 



The adult male differs from that of C. r. dialilaema only in having 

 the upperparts of a rather duller, grayer blue ; the point of the chin 

 black and the entire throat bright orange-rufous like the breast. The 

 adult female differs from that of dialilaema in having the upperparts 

 olivaceous-brown, becoming dark rufescent -brown on the tail; from 

 that of hainana, in lacking infuscation on the sides of the throat and 

 breast. 



CYORNIS TICKELLIAE SUMATRENSIS (Bowdler Sharpe) 



Sumatran White-bellied Cyornis 



Siphia sumatrensis Bowdler Sharpe, Catalogue of the birds in the British Mu- 

 seum, vol. 4, 1879, p. 451 (Sumatra). 

 Cyornis tickelli, Gyldenstolpe, Kungl. Svenska Vet.-Akad. Handl., 1913, p. 37 



(Den Chai, Ban Huai Horn). 

 Cyornis banyumas tickelliae ipartim], Gyldenstolpe, Ibis, 1920, p. 576 (Ban 



Huai Horn, Den Chai). 

 Muscicapula rubeculoides dialilaema [partitn] Deignan, Journ. Siam. Soc. Nat. 



Hist. Suppl., 1931, p. 144 (Chiang Mai). 

 Muscicapula tickelliae indochina [partim], de Schauensee, Proc. Acad. Nat. Sci. 



Philadelphia, 1934, p. 215 (Chiang Mai). 

 Muscicapula tickelliae indochina, Deignan, Journ. Siam. Soc. Nat. Hist. Suppl., 



1936, p. 119 (Chiang Mai). 

 Cyornis tickelliae sumatrensis, Riley, U. S. Nat. Mus. Bull. 172, 1938, p. 449 



(Chom Thong). 





