THE BIRDS OF NORTHERN THAILAND 63 



Accipiter gentilis schvedoivi, Rogeks and Deignan, Proc. Biol. Soc. Washington, 

 1934, p. 91 (Chiang Mai=Doi Suthep). — Deignan, Journ. Siam Soc. Nat. 

 Hist. Suppl., 1936, p. 76 (Chiang Mai=Doi Suthep, ?Doi Chiang Dao). 



This fine hawk is definitely known as a Thai bird only by a single 

 immature male, which came into my possession on November 29, 

 1931 ; it had been shot a day or two before by a Lao watchman at the 

 bungalow of H. B. M. Consulate, on Doi Suthep at about 3,500 feet. 

 The skin is now deposited in the collection of the Princeton Museum 

 of Zoology. The species may be less rare than is indicated by the 

 paucity of records: I believe that I saw a pair on Doi Chiang Dao 

 in December 1931, and on several occasions in winter, over the top- 

 most ridge of Doi Suthep, I have observed birds that may well have 

 been of this form. 



Adults are dark slaty above, with white bases of the feathers 

 showing through on the nape; they have black ear coverts and a white 

 eyebrow; the rounded tail narrowly white-tipped and crossed by 

 indistinct blackish bars; the underparts white, closely barred every- 

 where with narrow blackish bands. Immature birds are brown 

 above, with the tail narrowly white-tipped and narrowly barred light 

 and dark; below buffy white, heavily streaked with brown. 



This genus is recognizable among hawks by its relatively short, 

 rounded wing and long tail. The present form differs from its 

 Thai congeners by its great size and the lack of a definite mesial line 

 on the throat, but, because of the variation in size and color among 

 individuals of all these species, no record for this bird should be held 

 valid without a specimen. 



In default of suitable comparative material and with only one 

 immature bird from Thailand, the true subspecific identity of my 

 specimen must remain in doubt. A. g. khamensis, the supposed breed- 

 ing form of southeastern Tibet and Szechwan, is, if separable from 

 schvedcnvi, the race most likely, on a basis of analogies, to occur in 

 winter among the mountains of northwestern Thailand. 



ACCIPITER BADIUS POLIOPSIS (Hume) 



Burmese Shikra 



Micronisus poliopsis Hume, Stray FeatheFS, vol. 2, 1874, p. 325 (northern Pegu; 

 type locality restricted to Thayetmyo, ex Hume, Stray Feathers, vol. 3, 

 1875, p. 24). 



Astur poliopsis, Gyldenstolpe, Kungl. Svenska Vet.-Akad. Handl., 1913, p. 63 

 (Pak Pan). 



Astur badius poliopsis, Gyedenstolpe, Journ. Nat. Hist. Soc. Siam, 1915, p. 234 

 (Khun Tan) ; Kungl. Svenska Vet.-Akad. Handl., 1916, p. 124 (Khun Tan, 

 Pha Kho, Pang Hua Phong, Pak Ta) ; Ibis, 1920, p. 747 ("Throughout 

 Siam"). — de Schauensee, Proc. Acad. Nat. Sci. Philadelphia, 1929, p. 579 

 (Chiang Mai, Chiang Rai, Chiang Saen).— Deignan, Journ. Siam Soc. Nat. 

 Hist. Suppl., 1931, p. 166 (Chiang Mai). 



