THE BIRDS OF SOUTH-WEST AND PENINSULAR SIAM. 



73 



IBIDIDAE 



Ibises 



. f Smaller, pluniii<,'e white, dissected 

 1 Larger : plumage dark 



,y (Neck feathered to nape, smaller. . 

 " \ Neck naked to nape, larger 



Ibbi inelnnocephnln. 



Inocotis dnvisoni. 

 TJinionafibis giganlcn. 



92. Ibis melanocephala (Lath.). 



Tantalus melanoce-phalus, Liith., Ind. Oin. ii, 1790, p. 709 (lii<li;i). 

 1 his melanocephala, C. ii, p. 268 (Teniisserim) ; CJ., p. 152 (Ratljuri 

 and Petcliabuii) ; H., p. 89 (Bandon river). 



The white Ibis is fairly abundant on both coasts in suitable 



localities, but is usually almost impossible to approach. 



93. Inocotis davisoni (Hume). 



Geronticxis davisoni, Hume, Stray Feath. iii, 1875, p. .300 (Pakchan). 

 Graptocephahis davisoni, Elliot, P. Z. 8. 1877, p. 490 ; A., p 485 



(Pakchin) ; C. ii. p. 269 (South Tenasserira) ; F., p. 17 (Traiig) ; 



H., p. 89 (Bandon); J., p. 141 (Pulau Lontar) ; L., p. 92 



(Ghirbi and Koh Naka Yai). 

 Pseudibis papillosa, B., p. 85 (Junk Seylon). 



This dark Ibis, though it appears to us but little more than a 

 strongly marked race of the Indian /. pajpillosa, has been elevated to 

 generic rank, partly on the shape of its cranium, and partly on 

 account of the alleged absence of rugose papillae in the occiput and, 

 therefore, different colour. As a matter of fact our series shows that 

 these papillee are definitely present, at any rate at certain seasons, 

 and we do not think that the bird can profitably be kept generically 

 distinct. As regards bare parts, our birds are consistently coloured 

 and show no trace of red on the head, as is reported in the case of 

 birds from E. Siam, Cambodia and Yunnan, which have been named 

 G. harmandl Oustalet. These birds are either distinct from the 

 present species or, more probably, are to be referred to the true 

 /. papillosa.. 



94. Thaumatibis gigantea (Oust.). 



Ibis gigantea, Oustalet, Bull. See. Philomath. (7), i, 1877, p. 25 

 (Cochin-China). 



I- Gjidenstolpe, Kungl. 8v. Vet. Akad. Handl. 

 56, Ni). i, 1916. 

 J. Robinson. Jonrn. F. M. S. Mus. vii, 1917 

 K. Kloss, ll.is, 1918. 



L. Kobinwin and Kloss, Journ. X. H. Soc. Siam, 



iii, 19.19. 



M. Baker, Journ. X. H. Soc. Siam, iii, 1919. 



(first part). 

 Baker. Journ X.H. Soc. Siam. iii, 1919. 



(second pjirt). 

 M.I. Baker, .lourn. X.H. Soc. 'Siam, iv. 1920. 



(thii-d iwrl). 



VOL. V, NO, 1, 1921. 



