120 How to Sex Cage Birds. 



Yellow-shouldered Amazon (Chrysotis ochroptera). 



Only sexed males are indicated in the Museum, but the differences 

 are probably as in the preceding species. 



Yellow-fronted Amazon (Chrysotis ochrocephala). 



The beak of the male is broader, especially towards and beyond 

 the middle, than that of the female when viewed from above. The 

 sexed females show no yellow on the crown. As in the case of 

 C.farinosa, Count Salvadori regards this character as an evidence 

 of youth ; but it is odd that this youthful feature should only occur 

 in the sjjecimens sexed as females, not in those sexed as males. 



Yellow-billed Amazon (Chrysotis panamensis). 



Only a male sexed. Probably it has a longer and narrower beak 

 than the female, as in C. amazonica. 



Golden-naped Amazon (Chrysotis auripalliata). 



The beak of the male is broader than that of the female, more 

 swollen just before the middle, less arched, and has a longer terminal 

 hook. 



Levaillant's Amazon (Chrysotis levaillanti). 



The male is larger than the female, and his beak is slightly longer 

 and rather narrower at the base when viewed from above. 



Dufresne's Amazon (Chrysotis dufresniana). 



The male is larger than the female, with decidedly longer and 

 narrower beak. 



Red-toppkd Amazon (Chrysotis rhodocorytha). 



The male is larger and brighter in colour than the female ; but, 

 unlike the preceding species, his beak is shorter, broader, and more 

 arched than hers. 



Green-cheeked Amazon (Chrysotis viridigena). 



The beaks of the sexes are much alike, but that of the male is a 

 little heavier. The scarlet on the crown of the male extends farther 

 backward than on that of the female. 



Finsch's Amazon (Chrysotis finschi). 



The male is larger than the female and a little brighter in 

 plumage. The beak, as viewed from above, is narrower, slightly 

 longer, with more slender terminal hook. 



Diademed Amazon (Chrysotis diademata). 



The National Collection at present only possesses one unsexed 

 example; but it is probable that the beak of the male will prove 

 to be longer than that of the female. 



