130 How to Sex Cage Birds. 



Wants the black loral line, and also the black and rose collars and 

 the black mandibular stripes ; an indistinct collar of emerald green 

 round the neck. Size a little smaller than the male " (Salvadori, . 

 Catalogue of Birds, vol. xx. p. 445). 



African Ring-necked Parrakeet (Pakaornis docilis). 



In adult birds the beak of the male is shorter, broader before the 

 terminal hook, the latter being a little smaller than in the female. 

 Young females more nearly resemble the male in these characters. 

 In plumage the sexes differ much as in the preceding species. 



Blossom- headed Parrakeet (Palaiornis cyanocephala) 



The male is larger than the female ; the beak rather more curved, 

 forming a more regular triangle when viewed from above, that of 

 the female being fuller in the middle. In the latter sex the colour- 

 ing is very different ; " the head dull plum-blue, more greyish on the 

 forehead and cheeks ; a yellow collar, broader on the sides of the 

 neck ; no black collar and no black mandibular stripes ; no red 

 patch on the median upper wing-coverts. Upper mandible yellow, 

 lower dusky or blackish " (Salvadori, Catalogue of Birds, vol. xx. 

 p. 451). 



Rosy-headed or Rosa's Parrakeet (Pakeornis rosa). 



Male larger than female, with broader, deeper, and generally 

 more powerful beak. "The female may readily be distinguished 

 from the female of P. cyanocephala by the red spot on the wing- 

 coverts being present as in the male. The head is more greyish, and 

 the yellow collar less distinct" (Seth-Smith, Parrakeets, p. 107). 



Slaty-headed Parrakeet (Pakeornis schisticeps). 



Of this rarely imported species Mr Seth-Smith says : "The female 

 lacks the red wing patch, but is otherwise like the male " (Parrakeets, 

 p. 108). The same is true of the Burmese Slaty-headed Parrakeet 

 (Pakeornis finschi), another very rarely imported species. 



Malabar Parrakeet (Pakeornis peristerodes). 



I failed to find this species in the Museum owing to it standing 

 under the hybrid Latin and Greek name of columboides. Mr Seth- 

 Smith says of it: "The female, which is slightly smaller than the 

 male, lacks the green forehead and the bluish-green collar, and has 

 a blackish bill " (Parrakeets, p. 110). 



Derbyan Parrakeet (Pakeornis derbyana). 



A very rare species not in the Museum. As regards sexual 

 differences, Mr Seth-Smith says : " The male has the upper mandible 

 fed, whereas in the female both mandibles are black" (Parrakeets, 

 p. 112). 



