BIRDS FROM SIAM AND THE MALAY PENINSULA 253 



Dr. Smith took an immature female at Khun Tan, September 2. It 

 is of about adult size, but it is in a plumage quite different from the 

 adult. It may be briefly described as follows: Head green, blackish 

 on the nape; lores green; spot in front of eye and patch below eye 

 citron yellow; supra-auricular tuft lemon-yellow; auriculars blackish, 

 washed with green and light yellow; neck patch picric yellow washed 

 with light green; remainder of upperparts green as in the adult; throat 

 picric yellow washed with light green; remainder of lowerparts vander- 

 poel green; wings similar to the adult; tail peacock green, bluish along 

 the shaft of the feathers on the inner web, all but the central feathers 

 blackish on the inner web beyond the bluish shaft line. An immature 

 male from Doi Hua Mot, August 24, is similar, except that it has a 

 few blue feathers on the nape. 



Gyldenstolpe records it from Pa Hing ^^ and from Meh Nja Min ^; 

 Deignan -^ states that it is rare on Doi Sutep at 3,500-4,600 feet. 

 Lowe ^ found it 28 miles east of Um Pang. 



PSABISOMUS DALHOUSIAE CYANICAUDA Riley 



Psarisomus dalhousiae cyanicauda Riley, Proc. Biol. Soc. Washington, vol. 48, 

 p. 54, 1935 (Kao Sabab, southeastern Siam). 



Five males and four females, Kao Sabap, January 8, 1930, November 

 16-20, 1933. 



This series differs from a still larger series from northern and western 

 Siam in being darker, less yellowish, green above; below the green 

 has a more bluish cast; the most pronounced difference, however, is 

 in the color of the tail. In specimens from southeastern Siam it is 

 near paris blue, while m northern birds it is more of an Italian blue. 

 In cyanicauda there is a reduction of the green edging on the outer 

 web of the outer tail feathers at the base and it is confined to two or 

 three ; in northern skins even the middle tail feather has a green edging 

 on the outer web at the base. 



An adult male and female from Dran, southern Annam, in the 

 United States National Museum seem to belong here. 



P. d. cyanicauda is more like P. d. psittacinus of Sumatra and the 

 Malay States than the northern form. 



This form is evidently confined to southeastern Siam, Cambodia, 

 and southern Annam. 



Five males from southeastern Siam measure: Wing, 97.5-102.5 

 (100.8); tail, 122.5-135.5 (129.5); culmen, 18.5-19.5 (19) mm. Nine 

 males from northern, central, and western Siam and eastern Burma 

 (1): Wing, 97.5-106 (101.9); tail, 111-126 (120); culmen, 18-19.5 

 (18.8) mm. 



» Journ. Nat. Hist. Soc. Sinm, vol. 1, p. 229, 1916. 



M Kunpl. Svenska Vet.-Akad. Handl., vol. 66, no. 2, p. 86, 1916. 



" Journ. Siam Soc. Nat. Hist. Suppl., vol. 8, p. 156, 1931. 



>• Ibis, 1933, p. 283. 



33527—38 17 



