FROM WESTERN SUMATRA. 75 



the size of the bill. This latter is much straighter in va- 

 lidus than in enca^ where the culraen is more curved and 

 the whole bill more bent downward towards the point. 

 Professor Schlegel, with his experienced eye, saw this 

 difference very clearly , and demonstrated it sufficiently in 

 the above cited excellent plate with the Crows heads. 

 A comparison of the figures of validus and enca clearly 

 shows this difference. 



162. Tver on nasica. 



Treron nasica, Schl. Tijdschr. v. Dierk. I. p. 67 (1863); id. Mus. 



P.-B., p. 55 (187B); — Salvad. Ucc. di Borneo, p. 283 (1874); 



id. Ucc. di Sumatra, p. 241 (1879); — Snelleman, Sum. 



Exp. Vogels, p. 47 (1884). 

 Treron nepalensis, Tweedd. Ibis 1877, p. 321. 



8 specimens (cT cf )• 

 »Iris: inner ring ultramarine, outer pale rosy ; bare skin 

 round the eye pale green, bill blood-red at base, point 

 pale ochre , feet lake-red. Native name : Bunai tinggih." 



163. Treron oxyura. 



Columha oxyura, Temm. P. C. IV. 240 (1823). 



Treron oxyura, Wall.; — Sclil. Mus. P.-B., Columbae, p. 62 (1873); — 



Salvad. Ucc. di Borneo, p. 286 (1874). 

 Sphenocercus oxyurus , Salvad. Ucc. di Sumatra, p. 243 (1879); — 



Nicholson, Ibis 1888, p. 255. 



20 specimens (10 (ƒ, 7 9? ^ unsexed). 

 ))Iris madder-lake, bare space round the eyes green, bill 

 cobalt-blue , point yellow, feet chrome-yellow. Native name : 

 Bunai salung.^^ 



164. Treron v e mans. 



Treron vernans (L.) , ScM. Mus. P.-B., Columbae, p. 49 (1873); — 

 Snelleman, Sum. Exp. Vogels, p. 47 (1884); — Salvad. Ucc. 

 di Borneo, p. 286 (1874). 



Treron griseicapilla , Schl. Tijdschr. v. Dierk. I. p. 70 (1863). 



Osmotreron vernans, Tweedd. Ibis 1877, p. 321; — Salvad. Ucc. di 

 Sumatra, p. 242 (1879). 



Notes from the Leyden Museum, Vol. IX. 



