THE BIRDS OF SOUTH-WEST AND PENINSULAR SIAM. 79 



Probaby not uncommon in suitable localities, but, as remarked 

 by Williamson, apt to be overlooked owing to its close resemblance 

 to the ubiquitous Bubulcus coromandus. 



107. Demiegretta sacra (Gm.). 



Ardea, sacra, Gmelin, Syst. Nat. i, 1 788, p. 640. 



Demiegretta sacra, I., p. 481 (Mergui) ; Sharpe, Cat. Birds Brit. 

 Mus., xxvi, 1898, p. 143 ; E., p. 117 (Patani) ; F., p. 15, Malay 

 Peninsula) ; H., p. 143 (Koh Samui and Koh Pennan) ; I., p., 

 137 (Koh Lak) ; L., p. 92 (Pulau Panjang). 



?. Koh Pipidon, Ghirbi Bay, W. Coast Siam. 5 February, 

 1^19 (No. 3944). 



" Iris chrome ; tarsi black, toes mottled with yellow ; bill 

 blackish." 



Total length, 630; wing, 278; tail, 104 ; tarsus 79; bill from 

 gape 90 mm. 



Common throughout the coasts of Malaya in suitable localities. 

 Within our area a very large proportion of the birds are in the grey 

 plumage, with a more or less extensive white streak on the throat. 

 Nycticorax nycticorax (Linn.). 



Ardea nycticorax, Linn., Syst. Nat. i, 1788, p. 235. 



Nycticorax griseus, Williamson, Journ. Nat. Hist. Soc. Siam, i, 1914, 



p. 48 (Bangkok). 

 Nycticorax nycticorax, Stuart Baker, Journ. Nat. Hist. Soc. Siam, 



iv, 1920, p. 42 (Hua Takhae, C. Siam). 



The Night Heron will probably be found in Lower Siam, 

 though it is not yet on record from our area. 



108. Gorsachius melanolophus (Raffles). 



Ardea melanolophus, A., p. 484 (neighbourhood of Pakchan) ; F., 

 p. 15 (Trang) ; I., p. 137 (Koh Lak). 



Not really uncommon within its area of distribution, but 



easily escaping notice owing to its nocturnal habits. Mr. W. J. F. 



Williamson informs us that he has found it breeding in heavy 



forest at Pak Jong, Eastern Siam, in June and August. 



I. Gyldenstolpe, Kungl. Sv. Vet. Akad. Handl. M. Baker, Journ. N. H. Soc. Siam, iii, 1919. 



56, No. '2, 1916. (first part). 



<l. Robinson, Journ. F. M. S. Mus. vii, 1917. Baker, Joiu-n. N. H. Soc. Siam. iii, 1919. 



K. Kloss, Ibis, 1918. (second part), 



L. Robinson and Kloss, Journ. N. H. Soc. Siam, M. I. Baker, Journ, N. H. Soc. Siam, iv, 1920. 



iii, 1919. (third part), 



VOL. V, NO. 1, 1921. 



