﻿The description and measurements, as well as the figure of the adult bird in the plate, 

 are taken from a very fine skin in Mr. Wallace's collection. My own specimens average 

 about 12 inches in total length, their tail feathers having apparently not yet attained their 

 maximum growth. The young bird is described and figured from a specimen in my collec- 

 tion, obtained by Mr. Wallace in Morty Island. 



