40 MR. W. J. F. WILLIAMSON ON 
1d, 12. Prom-den, Meklong Railway, Central Siam, March 
1917. 
Male. W.4!6 mm. Female. W. 411. 
Iris dull yellowish white. Bill dull greenish horn, blackish 
at base, and reddish at tip and on underside of lower mandible. 
Gular skin and bare skin in front of eyes blackish. Legs fleshy 
white. Claws dull pinkish, dark at tips. 
My collector subsequently obtained four immature specimens at 
Ta-riia, Central Siam, in July 1917. 
The only previous reference to this bird, which I have come 
across in the literature dealing with the ornithology of Siam, is that 
of Gairdner (Journ. Nat. Hist. Soc. Siam, i, p. 30) who states that the 
huge flocks of it, which occur there, are a feature of the broad plains 
north-west of Ratburi. 
The Siamese name, Pak-hang, corresponds very closely in its 
meaning to the English one. 
Family ARDEID2—Herons. 
65. Herodias garzetta (Linn.). Zhe Little Egret. 
Garzetta garzetta, Ogilvie-Grant, Fasc. Malay., Zool. iii (1905), 
p. 117. | 
13,42. Tachin, Central Siam, August 1917 and January 1918 
8d, 22. Bangkok, Central Siam, November 1917. 
Male (one). T. L. 603 mm. W. 274. Males (three). W. 276, 
278, 280 mm. 
Female (one). T. L. 552 mm. W. 252. Females (five). W. 258, 
260, 261, 269, 275 mm. 
Iris pale yellow. Bill blackish, base of lower mandible 
whitish flesh. Facial skin greenish yellow. Tarsus and bare portion 
of tibia very dark to blackish brown. ‘Toes yellowish green to 
greenish yellow. Claws horn colour. 
The difference in colour between the tarsus and the toes is 
sharply defined and is a striking peculiarity of this bird. In some 
specimens the green of the toes extends up the tarsus as much as 
25 to 40 mm. 
JOURN. NAT. HIST. SOC. SIAM. 
