THE BIRDS OF SOUTH-WEST AND PENINSULAR SIAM. 27 



A orreat deal of confusion has arisen over the races of the 

 Thick-billed Green Pii^eon. It appears to be borne out by the state- 

 ments of all writers that the continental race southwards, trt the 

 northern third of the Malay Penin-ula, is consistently lar<;er than 

 birds from the southern two-thirds of the Malay Peninsula, .Sumatra, 

 Borneo and Bangka. Palawan and Sulu birds are also stated to be 

 lartrer. 



Every area has its name, viz: — 



Troron curvlroxird (Jm. ... 1788. Malay Peninsula, /^rrrf 



fypicd desit^nated by Ober- 

 holser, 1912. Now restricted 

 to Selancjor. 



Treron nipalenfiU Hodcjson •... 183G. Nepal, etc, 



Treron griseicaud<( Gray ... 1856. Java. 



Treron nasica Schlet(. ...1863. Borneo and Sumatra (?) 



Treron harterti Parrot ... 1907. N. E. Sumatra. 



There are also other races from the Barussan Islands. 



No one will probably dispute that the bird figured by Latham 

 (Gen. Syn. Birds, ii, 1788, p. 632, pi. 59 : and latinized by Gmelin as 

 Columf>a curviroafra, Syst. Nat. i, 1788, p. 777) represents the first 

 description of the species, though attached to a wrong locality (Tanna, 

 New Hebrides). Unless we are prepared to recognize the mere 

 references by Raffles and Vigors of Sumatran birds to Golnmhd 

 curviroftfrd (Gm.), as a fixation of the type locality, we are bound to 

 admit T. c. harferti as the name for the Sumatran bird (if distinct 

 from the Bornean and Javanese) ;* T. r. nasica\ for the Bornean ; 

 T. c. curvlrostrn for the Malayan ; and T. v. (jrificlcdudo for the Javan- 



♦Schlegel (Ned. Tijd. Dierk, i, 1864, pp. 67, 8) records both grisei- 

 canda and nasica from Sumatra. 



fSome authorities, however, including Walhioe, claim that T. nasica 

 in a distinct species, occurring together with T. curvirostra and diflfering 

 mainly in the colour of the soft parts. 



• 



!• GyldenstoUie, KuhkI. Sv. Vet. Akad. Handl. M. Baker, .Toum. X. H. Soc. Siam. iii, 1919. 



56, No. '2, 1916. (Hrst imrt). 



J. Robinson, Jouin. F. M. S. Mus. vii, 1917. Hiikor, .Toiirn. X. H. S<>c. Siam. iii. 1919. 



K. Kloss, Ibis, 1918. (sofond part). 



L. Kobinwin and Kloss, Journ. X. II. Six-. Slam. M.I. Huker, .Tourn. X. II. Soc. Siam, iv, 1920. 



iii, lillS). (thiiil ixirtt 



VOL. V, NO. 1, 1921. 



