BIRDS FROM SIAM AND THE MALAY PENINSULA 55 



horny patch on eiihnen; naked patch over each clavicle pale bluish; a 

 spot on lower eyelid pale yellow; feet dark dirty brown, claws dull 

 black. The weight of the male is given as twelve and a half pounds, 

 that of the female as ten pounds. 



This species ranges from the lower Himalayas from Kashmir to 

 Burma and Indo-China, south to Siam and down Penisular Siam to 

 the Malay States. Gyldenstolpe ^^ states that it is fairly com.mon 

 over the whole country, and several nests were observed in some large 

 trees south of Chiengmai ; Grant ^^ records it from Patani ; Robinson 

 and Kloss ^^ record it common everywhere. It does not extend south 

 of Taiping, Perak. 



CIRCUS MELANOLEUCUS (Forster) 



Falco melanoleucus Forster, Indian zoology, p. 2, pi. 2, 1769 (Ceylon). 



One female, Bangkok, December 30, 1925 (although marked 

 female, most certainly an adult male). 



This species breeds from Lake Baikal east to Ussuriland and south 

 to northern China; winters in eastern India, Burma, Siam, Indo- 

 China, the Philippines, and Malay Peninsula. 



Gyldenstolpe ^^ secured a male and female at Khun Tan and 

 observed it on the grassy plains at Nong Bua and in some numbers on 

 the great swamps of central vSiam; Deignan ^ reports that it occurs on 

 the Chiengmai ricefields from October to March; Lowe ^ observed it 

 on the Meping; Robinson and Kloss ^ say that it is common in Pen- 

 insular and southwestern Siam but a rare winter visitor to the southern 

 parts of the Peninsula as far as Johore. 



CIRCUS AERUGINOSUS AERUGINOSUS (Linnaeus) 



Falco aeruginosus Linnaeus, Systema naturae, ed. 10, p. 91, 1758 (Sweden). 



One female, Nong Preng, January 29, 1927. 



This form breeds from southern Sweden east to the Yenessei and 

 south to Turkestan and Mongolia; migrates south to winter in India, 

 the Malay Peninsula, southern China, and the Pliilippines. 



Gyldenstolpe ^ reports it from Bangkok and central Siam, and on 

 his second expedition he took four immature specimens at Koh Lak 

 in November and December ®; de Schauensee ^ took a male at Cliieng- 

 mai, December 25; Lowe ^ observed it on the Meping in March; 



»« Kunsl. Svenska Vet.-Akad. Handl., vol. 56, no. 2, p. 131, 1916. 



»' Fasciculi Malayenses, pt. 3, p. 115, 1905. 



«» Journ. Nat. Hist. See. Siam, vol. 5, p. 106, 1923. 



" Kungl. Svenska Vet.-Akad. Handl., vol. 56, no. 2, p. 123, 1916. 



' Journ. Siam Soc. Nat. Hist. Suppl., vol. 8, p. 166, 1931. 



' Ibis, 1933, p. 485. 



> Journ. Nat. Hist. Soc. Siam, vol. 5, p. 102, 1923. 



* Kunsl. Svenska Vet.-Akad. Handl., vol. 50, no. 8, p. 63, 1913. 



• Kungl. Sven,ska Vet.-Akad. Handl., vol. 56, no. 2, p. 124, 1916. 

 f Proc. Acad. Nat. Sci. Philadelphia, vol. 81, p. 579, 1930. 



' Ibis. 1933, p. 485. 



