KUNGL. SV. VET. AKADEMIENS HANDLINGAR. HAND 56. NIO 2. 13] 



The immatnre birds have fche frontal band, lores, supercilium and a line down the 

 nape bright ferruginous instead of white as in fche adull birds. In the young birds the 

 hill is dirty yellow instead of plumbcous. 



270. Poliohierax insignis. Wald. Feilden's Hawk. 



Poliohierax insignis: Gyldenstolpe I p. <i4; Gyldenstolpe III p. 234; Oustalef 1899 p. 234. 



J 1 Koon Tan, .May 1!U4. W = 145 mm.; T = 140 mm.; C= 12,:. mm. -■ $ Koon Tan. April L914. 

 W = 152 mm.; T = 129 mm.; C = 13 mm. 



Feilden's Hawk seems to be rather rare and also very locally distributed. During 

 my previous journey I met with it on the Korat plateau in Eastern Siarn bnt during in v 

 last Expedition I never myself met with it. However, Mr. Eisenhofer's native collector 

 obtained several specimens af Koon Tan and its neighbourhood, and to him I am indebted 

 for two fine specimens. 



271. Falco sp. 



A single specimen of a medium-sized Falcon was observed in a precipitous lime- 

 stone monntain a few miles south of Koh Lak in the Siamese Malaya. It most probably 

 was a specimen of the Indian Hobby (Falco severus Horsf. ) which species recently has 

 been obtained in Bangkok by Williamson (vide. Siarn. Journal. Nat. Hist. Soc. Vol. I, 

 No. 3, p. 198). 



272. Falco tinnunculus saturatus. Blyth. - The Kestrel. 



Cerchneis tinnunculus: Robinson & Kloss p. 29. 



$ Koh Lak 2G /n 1914. L = 345 mm.; W = 245 mm.; T = 182 mm.; C = 15 mm.; Tarsus = 34 

 mm. — Irides: brown. Bill: plumbeous (tip black). Legs: yellow. 



Probably a winter visitor only and not very common. Most often it was seen in 

 Central Siarn, where it frequented the large sometimes swampy plains which occur here 

 and there. In the Siamese Malaya it was, however, more abundant and several specimens 

 were observed in the bamboo-jnngles and in the open country near the coast. 



Falco tinnunculus saturatus Blyth. is very similar to both F. t. tinnunculus Linn. 

 and F. t. japonicus Temm. & Schleg. From the former it is separated by having a much 

 darker colouring and from the latter it is distingnished by its smaller size. 



F. t. japonicus which breeds in Japan and migrates to Southern China and Hainan 

 may eventually be found in Siarn, most probably in the Northern parts of the country 

 and more material from different localities and seasons is highly desirable. 



Fam. Vnlturidae. 



273. Pseudogyps bengalensis. Gm. — The Indian White-backed Vulture. 



Pseudogyps bengalensis: Gyldenstolpe I p. 62; Williamson I p. 47; Gairdner p. 31; Grant p. 115; Oustalet 

 1899 p. 229; Gairdner p. 151; Muller p. 430. 



