Genus DUCULA. 
The genus Ducwa differs from the last (Carpophaga) in having no 
green or bronze on the upper-plumage, in having a comparatively longer 
tail, and in having the inner primaries obliquely truncated at their ends, 
so that the outer webs project beyond the shaft. The two genera are not 
divided by either Salvadori or Sharpe, but the characteristics relied on, 
consisting as they do not only of striking differences in type of 
coloration, but also of differences in external structure, seem good 
grounds for keeping the genera distinct. 
This genus contains but one species, Ducula insignis, with two 
subspecies, griseicapilla and cuprea, which form geographical race: to the 
north-east and south respectively of the general range. 
Key to the Subspecies. 
A, Breast and abdomen pale ashy grey: 
a. Crown and hind-neck both lilac sce at .. D. 4. insignis. 
b. Crown grey contrasting with lilac hind-neck ... ...D. 1%. griseicapilla. 
B. Breast and abdomen lilac... ans eh mee aes Dz i. cwprea. 
H 2 
