Amazons, Etc. 



123 



Active Amazon (Chrysotis agilis). 



The beak of the male is longer and slightly narrower than that of 

 the female, and has a longer terminal hook. 



Short-tailed Parrot (Pachynus brachyurus). 



The beak of the male is shorter and heavier than that of the 

 female, and has a broader terminal hook. In the sexed example 

 of the female the naked skin round the eye is much darker than in 

 the male. The structure of the beak in this species is interesting 

 as being a reversal of the usual sexual differences in the true 

 Amazons. 



HEADS OF MALE AND FEMALE SHOUT-TAILED PARROT. 



Red-vented Parrot (Pionus menstruics). 



As in the preceding species, the beak of the male in this Parrot 

 is larger and broader than that of the female, with a shorter 

 terminal hook. 



Sordid Parrot (Pionus sordidus). 



Only the male is sexed in the Museum. The female is probably 

 a smaller bird, having a rather broader beak ; but, unhappily, there 

 are only three examples in the National Collection. 



