94 MESSRS. ROBINSON AND KLOSS ON 



A not infrequent winter visitor to the Malay Peninsula and 

 N. E. Sumatra, and certain to be found in South-west and Peninsular 

 Siani. 



133. Machaerhamphus alcinus Westerm. 



Machterhampkus alcinus, Westerm, Bijd. t. d. Dierk. i, 1848, p. 29, 

 pi. 12 (Malacca); A., p. 24 (Malewoon) ; 0. ii., p. 206 (Male- 

 woon) ; H., p. 90 (Bandon). 



This Bat-HaAvk, which is of crepuscular habits, will certainly 



be found to occur in the vicinity of most of the limestone hills that 



are so common in Lower Siam. The bird we obtained in Bandon 



was breeding on a lofty tree on the banks of the Bandon river. 



134. Pernis ptilorhynchus ptilorhynchus (Temm.). 



Bxdeo cristatus, Guv., Vieill. Tabl. Euc. Meth. Orn., March 1823, 



p. 1225 (Java), (nee Buteo cristatus, Nouv. Diet, iv, 1816, 



p. 481). 

 Falco ptilorhynchus, Temm, PI. Col. p'. 44, July 182.3 (Java and 



Sumatra) . 

 Pernis hrachijp)terus, Blyth, Journ. Asiat. Soc. Bengal, xxi, 1852, p. 



436 (Megui ?). 

 Pernis ptilorhynchus, C. ii, p. 207 (Tenasseriui). 

 Pernis cristatus, F., p. 29 (^Malay Peninsnin) ; ]., p. 130 (Koh Lak). 



S imm. Tapli, Pakchan, Peninsular Siam. 8 March, 1919. 

 (No. 4492). 



" Iris dark hazel ; bill black, base of lower mandible pinkish 

 horn ; feet pale yellow ". 



Total length 635 ; wing (in moult) 432 ; tail, 28.S ; tarsus 56 ; 

 bill from gape 43 mm. 



The question of the species or races of Honey Buzzards in the 

 Oriental region has never been seriously tackled, and the extreme 

 variability makes the allocation of specimens a very difficult one. 

 It appears to be an established fact that birds from India (except 

 southern India), west of the Bay of Bengal, never have a marked 

 and distinct occipital crest. They cannot therefore be assigned to 

 P. cristatus (Cuv.) of Java, which has slight priority over P. ptilor- 



A. Humo, & Davison, Stray Feathers, vi, 1878. E. O. Grant, Fasciculi Malayenses, iii (Birds), lf)05. 



B. Miiller, Die Oriiis der Insel SalauKa, 1882. F. Bohinson and Kloss, Ibis, 1910-11. 



C. Oates, Birds Brit. Burniali, Vols. i. A: ii, 1883. G. Gairdner, Journ. N.H. Soc. Siam, i. 1915. 



D. Bonhote, P.Z.S. 1901, Vol. i H. Robinson, Journ. F. M. S. Museums, v, 191.5. 



JOURN, NAT. HIST, SOC. SIAM. 



