Coast and Islands of South-eastern Siam. 727 



Accipiter gularis. 



Astur gularis Temm. & Schleg. in Siebold's Faun. Japon., 

 Aves, 184.4, p, 5, pi. ii. 



Accipiter gularis Hartert, Nov. Zool. xvii. 1910, p. 211. 



a. ? ad. Klong Yai, S.E. Siam. 4 Jan., 1915. 



b. ^ ad. Ok Yam^ Franco-Siamese Boundary (on coast). 

 3 Jan., 1915. 



" Male. Iris orange, bill plumbeous horny ; feet yellowish, 

 ■ tarsi olive-tinged. Female. Iris yellow ; bill horny grey, 

 cere yellowish green ; feet greenish yellow." — C. B. K. 



Partly from their migratory habits and partly from the 

 fact that adult birds form only a small proportion of the 

 skins available in collections, the sparrow-hawks of this 

 group are some of the most difficult of birds to identify 

 satisfactorily. 



A recent study of Malayan and Sumatran-Malayan 

 material has led me independently to the same conclusions 

 as those come to by Hartert in the article above quoted on 

 the Birds of Hainan (Nov. Zool. xvii. pp. 208-212). 



Of the pair listed the female has the wing 192 mni., 

 the upper surface brownish grey, the head darker and greyer 

 with the feathers of the nape white at the base. The 

 throat is white, unbarred, with a fine dark median hair-line. 

 The whole under surface from the throat down, including 

 the thighs, is regularly barred white and pinkish liver-brown. 

 The under tail-coverts are pure white. The fourth primary 

 is longest, the third nearly equal to it, and the fifth con- 

 siderably shorter. The male has the wing 163 mm., the 

 upper surface pure grey, darker on the head, the tail with 

 three not very distinct dark bands and a terminal band ; 

 middle of the throat with a broad ashy-grey median stripe ; 

 throat and upper breast pinkish brown, with ill-defined 

 greyish longitudinal stripes on the sides. Lower breast and 

 abdomen barred white and pinkish brown, the thigh barred 

 with wdiite and greyish brown, the under tail-coverts pure 

 white. Fourth primary longest, not much exceeding the 

 third and fifth, which are subequal. 



