THE BIRDS OF NORTHERN THAILAND 65 



Adult males have the irides orange or orange-red; the bill black, 

 plumbeous or slaty blue at the base; the cere green, or yellow with 

 yellow-green at the sides; the feet and toes yellow; the claws black. 

 Adult females differ only in having the irides golden-yellow. Imma- 

 ture birds are like the adults, but have the irides light yellow. 



Adults have the upperparts from brownish slate to blue-gray, 

 depending upon the age of the specimen; the visible portion of the 

 rounded tail crossed by four black bands, rather indistinct in older 

 birds ; the throat white with a more or less distinct gray mesial stripe ; 

 the under tail coverts white ; the remaining underparts closely barred 

 everywhere pinkish rufous and white. Immature birds have the 

 upperparts dark brown, with the white bases of the feathers showing 

 through on head and nape ; the throat white with a dark brown mesial 

 stripe ; the remaining underparts white, heavily marked with streaks 

 and drops of rufous and dark brown. The fourth primary is longest, 

 the third subequal. 



My synonymy of this bird is based upon personal examination of 

 all the specimens from our area in the museums of Europe and 

 America. 



The alleged characters of Jclossi, described by Kirke Swann from 

 South Annam, are not constant even in a topotypical series. The 

 name Astwr bifasciatus of Peale cannot be used for the Indo-Chinese 

 race, as has been done by Chasen (Birds of Malay Peninsula, vol. 

 4, 1939, p. 25). I have examined the type specimen in the U. S. Na- 

 tional Museum and find it to be an immature female of Accipiter 

 virgatus gularis Temminck and Schlegel. 



ACCIPITER SOLOENSIS (Horsfield) 



Horsfield's Sparrow Hawk 



Falco Soloensis Horsfield, Trans. Linn. Soc. London, vol. 13, 1821, p. 137 (Java). 

 Accipiter soloensis, Gyedenstolpe, Kungl. Svenska Vet.-Akad. Handl., 1916, p. 

 125 (Pha Kho) ; Ibis, 1920, p. 746 (Pha Kho). 



Horsfield's sparrow hawk is likely to occur in winter anywhere in 

 our provinces, but so far there are only three definite records: 

 Gyldenstolpe took a female at Pha Kho, April 14, 1914 ; I collected an 

 adult female at Ban Huai Mae Lit, October 1, 1936, and an adult male 

 at Ban Huai Ki, March 28, 1937. 



Gyldenstolpe has recorded that his bird was found perched upon a 

 clump of bamboo near the banks of an almost dry creek. My speci- 

 men from Huai Ki was on a dead tree beside a small stream at the 

 edge of light evergreen forest. The species seems to occur only in 

 wild, uninhabited places. 



The male had the irides dark brown ; the bill black, plumbeous at 

 the rictus; the cere orange; the feet and toes orange-yellow; the 



