THE BIRDS OF SOUTH-WEST AND PENINSULAR SIAIVI. 95 



hynchus Temm. (Java and Sumatra)* ; the former was a uniform 

 black bird, without a crest, but crested birds, also mainly black, are 

 stated to occur in Java. We have examined about 20 birds from 

 Sumatra, Borneo and the Malay Peninsula, which all have grey or 

 black lores, and a lengthened occipital crest, but which vary in colour 

 beneath, from an almost uniform white, through an almost uniform 

 buffy brown, to birds barred and striped below with clear black and 

 white, the black predominating. These birds agree exactly with 

 descriptions and figures of P. tweeddalii Hume (Malay (Peninsula), 

 which we cannot but regard as other than the very adult of P. 

 ptilorhynchus. We have also two birds of a uniform brownish 

 black, with no very lengthened crest, agreeing with the description 

 and figures of P. 'ptilorhynchus, which we regard as a dimorphic 

 form analogous with the case of 8p. horsfieldi and Sj^- caligatus 

 — forms of Sp. limnaetus. 



On the strength of its lengthened crest the South Indian 

 bird is probably entitled to sub-specific distinction as P. c;. ellioti, 

 but we have not examined specimens. 



Immature birds of the non-crested Indian race appear to visit 

 Siam and the Malay Peninsula in the winter months, and we possess 

 specimens from Pulau Jemor, in the Straits of Malacca, and Kuala 

 Lumpur. The name for the Continental and Northern Indian bird 

 is P. pt. rujicollis (Less.). 



135. Ictinaetus malayensis. 



Falco 7nalayensis, Reinw., Temm. PI. Ool. 1824, pi. 117 (Java and 



Sumatra, and Malay Archipelago). 

 Aquila ]iernigra, Hodgs., Journ. Asiat. Soc. Bengal, v, 1836, p. 227 



, ( Cential and Northern Nepal ). 

 Ictinaetus malayensis, F., p. 22 (Trang). 



^Nevertheless the name cannot be used, as Buteo cristatus had pre- 

 viously been applied to an Australian Osprey. 



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



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



J' Robinson, Journ. F. M. 8. Mus. vii, 1917. Baker, Journ. N. H. Soc. Siam, iii, 1919. 



K" KIoss, Ibis, 1918. (second part). 



L. Itobinson and Kloss, Journ. N. H. Soc. Siam, M. I. Baker, Journ. N. H. See. Siam, iv, ID-iO. 



iii, 1919. (third part). 



VOL. V, NO. 2, 1922. 



