Gbntjs TREEON. 



The genus Treron is very closely aUied to Osmotreron, and our sole 

 Indian species of the genus, T. nipalensis, is extremely Hke Osmotreron 

 pJtayrei in coloration. The former can, however, be distinguished at once 

 by the fact that the soft cere does not cover the top of the culmen next 

 the fore -head, the horny portion, or ramphotheca, extending over the 

 whole of the culmen. There is also a wide naked space round the eye. 



In the Indian species the vivid green of this orbital skin and the 

 equally vivid red of the base of the upper mandible, distinguishes at a 

 glance this species from all our other Green Pigeons. 



There are only two species of Treron — our Indian bird nipalensis, 

 and nasica, which is found in Sumatra, Engano, Bangka, and possibly 

 southern Borneo. But our bird is, as a matter of fact, only a sub- 

 species of Treron curvirostra of Borneo, Sumatra, etc., as I show when 

 dealing with the distribution of the two forms ; though, having but 

 the one subspecies within Indian limits, we need not, in this instance, 

 adopt the trinomial system. 



(13) TRERON NIPALENSIS (Hodg.). 



THE THICK-BILLED GREEN PIGEON. 



(Plate 5.) 



Toria nipalensis Hodg., As. Nes., XIX p. 164 pi. ix (head and foot) 1836 ; 

 Blyth and Wald., B. Burma, p. 143. 



Treron nipalensis Blyth, J.A.S.B., XIV p. 847 ; id.. Cat. B.M.A.S.B., p. 228 ; 

 Jerdon, B.I., in p. 245 ; Godw.-Aus., J.A.S.B., XLIH pt. 2 p. 171 ; 

 Hume and Gates, Str. Feath., Ill p. 160 , Wald., B. Burma, p. 145 ; 

 Hume and Dav., Str. Feath., VI p. 410 ; Hume, ib., VIII p. 100 ; id.. 

 Cat. no. 771 ; Bingh., Str. Feath., IX p. 193 ; Hume and Inglis, ib., 

 p. 257 ; Gates, B. Burma, II p. 306 ; id., Str. Feath., X p. 235 ; Hume, 

 ib., XI p. 289 ; Salvadori, Cat. B.M., XXI p. 34 ; Sharpe, Hand-List, 

 I p. 54 ; Gates, Cat. Eggs B.M., I p. 83 ; Stuart Baker, J.B.N.H.S., 

 X 363 ; Inglis, ib., XI p. 475 ; H. R. Baker, ib., XVH p. 764 ; Stuart 

 Baker, ib., XVII p. 971 ; Harington, ib., XIX p. 308. 



Treron nepalensis Gates, in Hume's Nests and Eggs, 2nd ed., II p. 370 : Blanf ., 

 Avi. Brit. I., IV p. 14. ' i- . 



Hook-billed Pigeon Lath., Syn., U p. 632 (1783). 



Columba curvirostra Gm., Sys. Nat., I p. 777 (1788). 



