TEER0NIDJ3. J 



I}'". Soles normal, not very broad ; only 

 the hind toe with the skin promi- 

 nently expanded on the sides ; tail fp- 210. 



with 12 feathers 2. ColumbidaB, 



b" . Tarsus equal or longer than the 



middle toe ; tail-feathers from 12 [p. 372. 



to 20. (Ground-Pigeons.) 3. PeristeridsB, 



b' . Head crested, the feathers of the crest 

 with the barbs separated ; tarsus 

 covered all over with small hexagonal 



scales : feathers of the tail 16 4. Gouridae, p. 619. 



Xostrils oblique; bill hooked, very high and 

 toothed or serrated near the tip of the 

 lower mandible, which is truncated ; tar- 

 sus longer than the middle toe, and very 



imperfectly scutellated on the upper [p. 626. 



part 5. Didunculidae, 



Family I. TRERONID.E. 



Key to the Subfamilies. 



Rill rather thick ; general plumage (ex- 

 cept in Phabotreron) mostly green, and 

 generally a yellow band on the wings . . 

 Bill rather thin ; no conspicuous yellow- 

 band on the wings at the tips of the 

 greater upper wing-coverts. 

 a'. Bill rather short, not very distensible 

 at base ; size small, rarely exceeding 

 that of C. livia ; plumage mostly 

 green, but generally much variegated 

 with patches of different colours. . . . 

 b'. Bill rather long, very distensible at 

 base, and with a very short dertrum 

 (except in Hemiphaya) ; size rather 

 large, not inferior to that of C. 

 livia ; general plumage not much 



1. TRERONIXjE, p. 3. 



2. PTILOPODINjE, 



[p. 171. 



variegated 3. CARPOPHAGI\.£, 



Subfamily I. TREROXIN.E. 



Key to the Genera. 



a. General plumage green ; tail-feathers 14. 

 a . Bill soft at the base; the rhamphotheca 

 of the upper mandible not reaching the 

 feathers of the forehead. 

 a". Tail more or less wedge-shaped, with 

 the central tail-feathers mure or less 

 acuminate, in some species much [p. 4. 



longer than the lateral ones 1. SpHKNorrncus, 



b2 



