Genus BUTRERON. 



The genus Butrerm consists of a single species, which forms a 

 connecting link between Osnwtreron and Treron, for whereas the former 

 has a soft cere covering weU over one-third of the basal portion of 

 the bill, and the latter has the whole of the cuhnen clear of the cere, 

 Butreron has the homy part or ramphotheca including more than 

 two-thirds, and the cere less than one-thkd of the cuhnen. It also 

 has a narrow orbital space bare, though this is not so extensive or 

 vividily coloured as in Treron. 



The biU is stout and high; the third primary is sinuate on the 

 inner web, but less so than in Crocopus and Osmotreron ; the lower 

 tail-coverts are very long. 



(12) BUTRERON CAPELLII. 



THE LARGE THICK-BILLED GREEN PIGEON. 



(Plate 4.) 



Colurnba capdlii Temm., PL Coll. 143 (1823). 



Treron capellii Blyth, J.A.S.B., XIV p. 848 ; id., Cat. B.M.A.S.B., p. 228 ; 



Hume, Str. Peath., VIII p. 67 , Everett, J.S.B.A.S. 1889, p. 196. 

 Butrerm capellii Bp., Con. Av., II p. 9; Blanf., Avi. Brit. I., p. 13; Finn, 



J.B.N.H.S., XIV., p. 577. 

 Butreron capellei Salvadori, Cat. B.M., XXI p. 32. 



Vernacular Names. Not recorded. 



Description. — Adult male. Whole upper-plumage an olive-grey green, 

 the fore -head paler and more grey, and the back of the neck more yellowish ; 

 upper tail-coverts still more yellow, especially on the longest which are 

 practically the same in tint as the centre tail-feathers. These are greenish- 

 yellow with pale brown shafts, the outermost feathers are dark slate-grey, 

 with a broad pale grey tip, and the intermediate feathers gradually change 

 in coloration between the two extremes. Lesser and median wiug-coverts 

 like the back ; greater coverts, shoulder of wing, bastard-wing, and quills 

 deep slate-grey, a few of the outer median and all the greater coverts narrowly 

 margined bright king's-yellow ; innermost secondaries paler than the other 

 quills, and becomiag green like the back on the smallest — broadly margined 

 on the outer webs with king's-yellow. Throat and neck pale greenish-yeUow, 

 changing on the sides of the neck and face to the colours of the upper -parts ; 

 breast bright deep orange, the sides washed with a tinge of chestnut, remainder 



