252 PSITTACI. 



Pionus senilis. 



Psittacus senilis, Spix, Av, Bras. p. 42, pi. xxxi. fig. 1 (1840). 

 Pionwi senilis, Sclater & Salvin, Nomencl, Av. p. 114 (1873). 



The White-headed Caique. 



Ilab. Mexico. 



1176. yternum of female, with shoulder-girdle. S. S. 2170. 



From the Zoological Society/. 



1177. Sternum, with shoulder-girdle, wanting left coracoid and 



scapula. S. S. 1010. Purchased. 



Genus CAICA. 

 Lesson, Traite d'Orn. p. 198 (1831). 



Caica melanocephala. 



Psittacus melanocephalus, Linnaeus, Syst. Nat. i. p. 149 (1766). 

 Caica melanocephala, Sclater ik Salvin, Nomencl. Av. p. 114 

 (1873). 



The Black-headed Caique. 



Hah. Demerara. 



1178. Sternum of male, with shoulder-girdle. S. S, 2156. 



From the Zoological Society. 



Genus PSITTACUS. 

 Linnaeus, Syst. Nat. i. p. 139 (1766). 



Psittacus erythacus. 



Psittacus erithacHs, Linnaeus, Syst. Xat. i. p. 144 (1766). 

 Psittacus erythacus, Hartlaub, Orn. West-Afr. p. 166 (1857). 



The Grey Parrot. 



Hah. Africa. 



1179. Skeleton. 0. C. 1455. South Collection. 



1180. Natural skeleton : mounted. 0. C. 1454. Hunterian. 



