THE BIRDS OF SOUTH-WEST AND PENINSULAR SIAM. 



73 



IBIDIDAE 



Ibises, 



, I Smaller, plumage white, dissected 

 1 Larger : plumage dark 



^ [Neck feathered to nape, smaller. . 

 " (Neck naked to nape, larger 



Ibis melnnoccphala. 



Inocotis davisoni. 

 Thaumatibis gigantca. 



92. Ibis melanocephala (Lath.). 



Tantalus vielanocephalus, Lath,, Tnd. Orn. ii, 1790, p. 709 (India). 

 I his melanocephala, C. ii, p. 268 (Tenasserim) ; G., p. 152 (Katburi 

 and Petchabiiri) ; 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). 



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

 Graptocephalus davisoni, Elliot, P. Z. S. 1877, p. 490 ; A., p. 485 



(Pakclim) ; C. ii. p. 269 (South Tenasserim) ; F., p. 17 (Trang) ; 



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



(Ghirbi and Koh ISTaka Yai). 

 Pseudihis papulosa, B., p. 85 (Junk Seylon). 



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



strongly marked race of the Indian I. papillosa, 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 papillae 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. harinandi Oustalet. These birds are either distinct from the 



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



I. 'papilloso.. 



94. Thaumatibis gigantea (Oust.). 



Ihis gigantea, Oustalet, Bull. Soc. Philomath. (7), i, 1877, p. 25 

 (Cochin-China). 



I- Gyldenstolpe, Kungl. Sv. Vet. Akad. Handl. 

 56, No. 2, 1916. 

 J. Bolsinson, Journ. F. M. S. Mus. vii, 1917 

 K. Kloss, Ibis, 1918. 



L. Bobinson and Kloss, Journ. N. H. Soc. Siam, 



iii, 1919. 



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



(first ijart). 

 Baker. Joiu'n N. H. Soc. Siam, iii, 1919. 



(second part).' 

 I. Baker, Journ. N.H. Soc. Siam, iv. 1920. 



(third part). 



VOL. V, NO. 1, 1921. 



