Birds of Celebes: Treronidae. 
595 
and are fed on a secretion from the crop of their parents. They lay white 
eo-o-s, usually two in number, either in holes in trees or rocks, or in lightly- 
built open nests in trees or bushes. They are vegetable-feeders, furnished with 
a large crop. 
The Pigeons vary in size from that of a Lark (Geopelia) to that of a small 
Goose (Goura), and are of cosmopolitan distribution. 
For anatomical particulars see; Gadow in Bronn’s Klassen u. Ord. 1893, 
vol. VI, pt. 4, II, pp. 210—212, Salvador!, Cat. B. XXI 1893, pp. 1, 2'), and 
Meyer, Abb. v. Vogelskeletten, vol. I — II, 1879 — 1897. 
Count Salvador! recognises 5 families of the suborder Columbae, of which 
the Gouridae of Papuasia and the Didunculidae of Samoa are more abeiTant from 
one another and from the other families, Tvevonidue, Colunibidae and Peristeridae, 
than the latter are among themselves. 
The three latter are represented in Celebes. 
FAMILY TRERONIDAE. 
Tree-pigeons, distinguishable from the Ground-pigeons by having the tarsus 
generally shorter than the middle toe, from the Columbidne by the much broad- 
ened soles of the toes, by the tail of 14 rectrices (except in 3 genera not 
occurring in Celebes) ; tarsus feathered for more than half of its length (Salvad.). 
They are chiefly fruit- eaters. Salvador! subdivides the Treronidae into three 
subfamilies, of which the Treroninae have the bill rather stout, with a large 
raptorial-looking nib, longer than the bare soft basal portion. In the PtUopodinae 
and Carpophaginae the bill is more slender, the nib less hooked and not so large; 
the former are small, with brightly contrasting patches of colour, the latter a 
large species of less varied plumage. 
GENUS OSMOTRERON Bp. 
General colour green. Supranasal plumes not quite reaching to the base 
of the nib of the bill. Third primary longest, with the inner web deeply 
scooped out about the middle, where it is hardly wider than the outer web. 
'fail of 14 feathers, slightly rounded, rather short, the under coverts reaching 
nearly to its tip. Ranges from India south-east as far as Buru and Timor. 
* 251. OSMOTRERON WALLACEI Salvad. 
Green Dove. 
a Treron griseicauda (1) Wall, (nec Gray), P. Z. S. 1862, 335, 344; (2) id., Ibis 1863, 
319; (S) id., ib. 1865, 376; (4) Finscli, Neu Guinea 1865, 176; (5) Schl., Ned. 
i^”G^^Zow~and Salvadori state that Pigeons have eleven primaries! There are ten in Ttirtur and 
Macropygia. _ 
