BIRDS FROM SIAM AND THE MALAY PENINSULA 453 



This specimen agrees faiiiy well with a male from the Kateman 

 River, eastern Sumatra, and the type of calocephala. Four males 

 from Borneo are somewhat lighter blue above and seem to represent 

 another form, C. r. beccariana (Salvadori). 



C. r. rufigasira ranges from Sumatra and Banka to the southern 

 Malay States and the Rhio Archipelago. Apparently there are no 

 Siamese records, but it may extend to Peninsular Siam. 



CYORNIS UNICOLOR UNICOLOR BIyth 



CyorrAs unicolor Blyth, Journ. Asiat. Soc. Bengal, vol. 12, p. 941 (nomen nudum), 

 p. 1007 (Darjeeling, India), 1843. 



Two males, Khun Tan, September 2 and 5, 1930; one male, Doi 

 Nangka, November 19, 1930; two males and one female, Doi Hua 

 Mot, August 28, September 2, 1934; one male, Doi Kiew Koh Ma, 

 December 25, 1932; two males and one female, Khun Tan Mountains, 

 3,000 feet, May 17, 18, 1933. 



The only specimen iivailable for comparison is a male from Mar- 

 gherita, Upper Assam. From it the Siamese specimens seem to be 

 distinguished by being somewhat brigher blue. 



The species unicolor can be told from the males of all others from 

 Siam by its pale blue (porcelain or orient blue) upperparts and chest, 

 the forehead Venetian blue, the breast and belly light mineral gray 

 with a brownish wash. The female is dull brown above, lighter 

 below, becoming smoke gray on the belly; the nape has a bluish wash 

 and the forehead is etain blue. The wings in four males measure 

 82.5-84 (83.1) mm. A male taken at Doi Hua Mot, August 28, is 

 almost an albino. It is very pale blue, almost white, deeper on the 

 forehead and throat, the back with faint dusky shaft streaks. 



De Schauensee ^* took a male on Doi Sutep at 4,500 feet, which was 

 recorded as C. u. harterti; later it was taken on the same mountain by 

 Mr. Aagaard and recorded by Cliasen and Kloss " as above; on his 

 third expedition de Schauensee ^^ took a good series on Chiengdao and 

 at Chiengmai. 



The form ranges from Darjeeling along the Himalayas to eastern 

 Assam, Manipur, the southern Shan States, and northern Siam. 



In the treatment of the genus Cyornis Blyth I have followed the 

 revision of Robinson and Kinnear ^^ with some minor changes. Since 

 their revision appeared Chasen and Kloss ®^ published a paper on the 

 genus and reached different conclusions. Stresemann and de 

 Schauensee ^^ also have written a paper dealing with the species cov- 



" Proc. Acad, Nat. Sci. Philadelphia, vol. 80, p 671, 1928. 



»5 Journ. Siam Soc. Nat. Hist. Suppl., vol. 8, p. 239, 1932. 



»« Proc. Acad. Nat. Sci. Philadelphia, vol. 86, p. 214, 1934. 



»' Nov. Zool., vol. 34, pp. 231-201, 1928. 



" null. Raffles Mus., no. 2, pp. 23-42, 1929. 



«• Proc. Acad. Nat. Sci. Philadelphia, vol. 88, pp. 337-351, 1936. 



