150 Journal of the I-'. M.S. Museums. [Vol. VII, 



Fairly common on both the above islands. 



A comparison of the above series and seventeen other 

 specimens from various parts of the Malay Peninsula 

 with nine specimens from Eastern Java (Idjen massif, nr. 

 Banjoewangi) show that it is readily possible to distinguish 

 the Malayan and Siamese from the typical }a\an form, in 

 that, both in males and females the rump and upper tail 

 covert are concolorous with the back and not strongly tinged 

 with zanthine orange. Dimensions are practically identical. 



Types: Adult mule. Lamra, Trang, Siamese Malaya, 

 collected on January 10th. 1910. 



Adult female: Gunong Jerai (Kedah Peak), Kedah, 

 2,800 ft. to 3,500 ft. collected on December 2nd. 1915. 



Remarks: It is possible that Oreskios gouldi quoted bv 

 Ogilvie Grant, floe, at.) as of Bp. Coiisp. Vol. Zyg. p. 14 

 (1854) applies to this bird, but I have no access to the 

 reference. The name, however, is of earlier date as it is 

 quoted by Bonaparte in 1850 (Coiisp. Av. 1. p. 1511 as a 

 synonym of Trogon oreskios and attributed to Swainson. 

 though I cannot trace the quotation. I prefer, therefore, 

 to regard it as a nomen nudum. 



40. DlCHOCEROS BICORNIS (Linn.) 



Ogilvie Grant, Cat. Birds. Brit. Mus. XVII, p. 355 

 (1892) ; Robinson and Kloss, p. 35 : Robinson. Ibis. 1915. p. 733 ; 

 Gyldenstolpe, p. 113. 



a. S. \Y. side Pulau Telibun, Trang. S.W. Siani. 

 2nd January, 1917. [No. 3911.] 



Common on Terutau. Langkawi, Telibun and Lontar, 

 but nearly always flying very high or feeding on very lofty 

 trees and therefore difficult to procure. 



41. Rhytidoceros undulatus (Shaw). 



Ogilvie Grant, torn. at. p. 382; Robinson and Kloss, 

 p. 36; Robinson, Ibis, 1915, p. 733; Gyldenstolpe. p. 113. 



a. i. Pasir Raja, Pulau Lontar, S.W. Siam, 

 12th January, 1917. [No. 3912.] 



Also common on the islands. 



42. Anthracoceros albirostris (Shaw and Nodder.) 

 Anthracoceros malabaricus, Grant, torn. at. p. 365 ; 



Robinson and Kloss, p. 35. 



Anthrococeros albirostris, Robinson, Ibis, 1915. p. 734 : 

 Gyldenstolpe, p. 112. 



a. ?. Burau, N.W. Langkawi. 13th December. 

 1916. No. 3631. 

 " Iris hazel, bill and casque ivory, black at tip and 

 base, feet pale plumbeous with a greenish cast.'* 



