1920.] List of the. Birds of Slam. 745 



This species, i£ really distinct from the former, occurs 

 throughout peninsular tSiam, though apparently very rare. 



Machaerhamphus alciiius Westerm. 



Maclicerhamplius alcinus Westerman, Bijdr. tot de Dierk. 

 i. 1«48, p. 29, pi. 12 : Malacca. 



Extremely rare in Siam, where it has only been obtained 

 at Ban Kok Klap in the province of Ban don, peninsular 

 Siam. T/T.,,„^,wo c <f~iM;iytt) , 



Circaetus gallicus Grm. 



Falco gallicus Grmelin, Syst. Nat. i. pt. 1, 1788, p. 259 : 

 France. 



A single specimen was obtained by the present author at 

 Koh Lak in south-western Siam. Otherwise not recorded 

 from Siamese territory. 



Spilornis cheela malayensis Swann. 



Spilornis cheela malaijeasis Swann, Syn. List Accipit. iii. 

 1920, p. 83 : Pahang. 



Recorded from peninsular and south-western Siam, though 

 ap{)ai'ently rare. 



Spilornis cheela burmanicus Swann. 



Spilornis cheela burmanicus Swann, Syn. List Accipit. iii. 

 1920, p. 81 : Thayetmyo, Burma. 



This form of the Crested Serpent-Eagle is rather common 

 throughout the country, and it occurs among the moimtains 

 as well as in the low-lying countiw. 



Spilornis cheela pallidus Wald. 



>::ipilonus pallidas Walden, Ibis, 1872, p. 363 : Borneo. 



Specimens belonging to this form have been obtained at 

 Ban Kok Klap, peninsular Siam, and on the island of Koh 

 Samui. 



Elanus caeruleus caeruleus Desf. 



Falco cairuleus Dcslontaines, Hist. (Mem.) Acad. Paris, 

 annee 1787, p. 503, |)1. xv., 1789 : Algeria. 



Found in central and south-western Siam during the 

 winter months. 



