Key to the Genera. 



A. Tail less than two-thirds of wing in length : 



a. Neck-feathers not acuminate ; dark bars on secondaries ColuTnJba. 



b. Neck-feathers acuminate ; no dark bars on secondaries Dendrotreron. 



B. Tail exceeding two-thirds of, but not longer than, wing : 



c. Larger, wing 7.5 in. or over ; no white tips to tail- 



feathers ; tarsus shorter than middle toe with- 

 out claw : 



a' A white bar, conspicuous beneath, across tail ... Palumbus. 



V No white bar across tail ... ... ... ... Alsocomus. 



d. Smaller, wing 7.4 in. or under ; white or grey tips to 



tail ; tarsus longer than middle toe without 

 claw : 



c' Sexes alike : 



second and third quills longest 

 d' Sexes dififerent ; first and second quills longest 



Streptopelia. 

 Oenopopelia. 



C. Tail longer than wing, and much graduated 



Macropygia. 



