445 
ON A NEW FORM OF WHITE-EYE FROM SIAM. 
By H. C. Rogpinson AND C. BopEN Koss. 
Zosterops palpebrosa williamsoni, subsp. nov. 
Zosterops palpebrosa awreiventer, Stuart Baker ( nec Hume ), 
antea, p. 190. 
Intermediate between Z. p. simplex! Swinh., of South China 
and Z, p. aureiventer Hume, of the Malay States ( Typical locality, 
Tavoy). 
Rump yellower than in simplex and a streak of yellow near- 
ly always present on the abdomen. 
Duller throughout than awreiventer ; greener, less yellowish 
above ; throat, foreneck and tail-coverts paler yellow; abdominal 
stripe very much smaller; sides and flanks without any wash of 
drab. 
Type: Adult male from Meklong, Central Siam, obtained on 
12th February 1918 by Mr. W. J. F. Williamson’s collector. 
Dimensions: Tail, 39; wing, 54; tarsus, 15.5; bill from gape 
12.5 mm. 
Specimens examined: The type and seventeen others from 
the same locality; one from Koh Rah, Takuapa, West Coast of 
Peninsular Siam, Feb. 1919; and five from Batu, Selangor, Malay 
States, Nov. 1906. 
Compared with fourteen examples of Z. p. awreiventer from 
the Malay States and a specimen of Z. p. simplex from Kuakiang, 
South China. 
— 
1 We have followed Hartert (Vig. Palaark. Faun., 1, 1905, p. 315) 
in regarding simplex as a subspecies of Z. palpebrosa (‘Temm.). 
JOURN, NAT, HIST, SOC. SIAM, VOL III, NO, 4, 1919, 
