Genus BUTRERON. 
The genus Butreron consists of a single species, which forms a 
connecting link between Osmotreron and Teron, for whereas the former 
has a soft cere covering well over one-third of the basal portion of 
the bill, and the latter has the whole of the culmen clear of the cere, 
Butreron has the horny part or ramphotheca including more than 
two-thirds, and the cere less than, one-third of the culmen. It also 
has a narrow orbital space bare, though this is not so extensive or 
vividily coloured as in T'reron. 
The bill 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.) 
Columba capellit Temm., Pl. Coll. 143 (1823). 
Treron capellit Blyth, J.A.S.B., XIV p. 848; id., Cat. B.M.A.S.B., p. 228; 
Hume, Str. Feath., VIII p. 67; Everett, J.S.B.A.S. 1889, p. 196. 
Butreron capellit Bp., Con. Av., If p. 9; Blanf., Avi. Brit. I, p. 13; Finn, 
J.B.N-ELS:, XIV., <p. 67:7: 
Butreron capellei Salvadori, Cat. B.M., X XI 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 wing-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 becoming green like the back on the smallest—broadly margined 
on the outer webs with king’s-yellow. Throat and neck pale greenish-yellow, 
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 
