Northern Portion of the Malay Peninsula. 
15 
30. Demiegretta sacra. 
Demiegretta sacra (Gmel.); Sharpe, tom. cit. p. 137. 
The Reef-Heron is common throughout the coasts of the 
Malay Peninsula where the shore is of rock or sand, but 
appears to avoid the mangroves and mud-flats. All the 
specimens that we have secured are in the grey phase of 
plumage. 
32. Gorsachius melanolophus. 
Gorsachius melanolophus (Raffles) ; Sharpe, tom. cit. 
p. 166 . 
This Bittern is very sparingly distributed throughout the 
Peninsula, though its comparative rarity in collections there¬ 
from is probably due to its nocturnal habits. We are inclined 
to think that the species is at least partially migratory, and 
the majority of the few specimens that have passed through 
our hands were obtained in the winter months. Most 
of our material was secured actually on the coast or on 
small islands in the Straits of Malacca, but the Trang 
collection contains an immature female from Ko Khau, at 
some considerable distance inland. 
33. Butorides javanica. 
Butorides javanica (Horsf.); Sharpe, tom. cit. p. 177. 
Abundant everywhere on the coast and on the tidal 
estuaries, wherever there are mangroves. 
& 
34. Ardeola BACCHUS. 
Ardeola bacchus (Bp.); Sharpe, tom. cit. p. 211. 
A male Pond-Heron, indubitably of this species, was 
obtained on Pulau Langkawi in March 1909, and Pond- 
Herons were also abundant in Trang on the flooded rice- 
fields in December and January. All the specimens obtained 
were, however, in winter plumage, in which stage it is 
almost impossible to separate the two species A. grayi 
and A. bacchus, whose ranges overlap in the northern Malay 
Peninsula. The genus is extremely rare in the south, 
though a specimen of A. grayi is in the British Museum 
