34 Mr. Strickland's Commentary 



nicophieus forms its nearest affinity, but in the pointed wings and co- 

 lour of the plumage it approaches Cuculus. 



P. 51. The group Psittacara, as defined by Vigors in the Zool. 

 Journ. vol. ii., seems sufficiently distinguishable from Conurus, Kuhl, 

 to be retained as a genus. 



For Centrourus write Centrurus. Mr. Gray has mistaken the type 

 of this genus as defined by Swainson, which is the Nestor mcridio- 

 nalis (Gm.) (A'', hypopolius, Wagl., Psittacus australis, Shaw, 

 Mus, Lev. 87) ; consequently Centrourus, Sw., merges into a syno- 

 nyme of Nestor, Wagl. The Psittacus australis of Latham (P. con- 

 cinnus, Shaw) is hardly to be distinguished generically from Tricho- 

 glossus, but if made distinct, will require a new name. 



P. 52. The specific name of Psittacodis should be paraguanus, 

 Gm., not par agua, Marcgrave, the latter name being antecedent to 

 the system of binomial nomenclature. 



For Poiocephalus write Pyocephalus, the ui in Greek becoming « 

 in Latin and e in English. (Hence the term poikilitic, lately intro- 

 duced in Geology, should be written pecilitic, as we write economy 

 and not oikonomy.) 



Mr. Gray seems to have omitted a genus of Loriince which wants 

 a name. It is the Psittuculus of Swainson, and is typified by P. ver- 

 nalis, gulgulus, and rubrifrons. 



P. 53. Mr. Gray very properly restores the name Agapornis, 

 Selby, to its true type, from which Mr. Swainson had removed it 

 and applied it to the American group Psittacula. 



The name Psittacula should be quoted on the authority of Brisson, 

 not of Kuhl. Brisson divides the genus Psittacus into six subgenera, 

 which, being based on definitions, may be retained on Brisson's au- 

 thority. These are Ara, Cacatua, Lorius, Psittacus, Psittuca, and 

 Psittacula. The name Psittaca, however, being too near in sound 

 to Psittacus, is not retained. 



PI. Enl. 455. f. 1, quoted by Mr. Gray under Psittacula passerina, 

 is the basis of P. capensis, Gm., so name 1 from a mistake in the 

 habitat. This bird is named guianensis by Mr. Swainson, who con- 

 siders it distinct from passerinus, Lin.^ which he calls cyanopterus. 

 The chief distinction is that the guianensis, Sw. {capensis, Gm.), has 

 the rump green, while in the j^usserinus, Lin. {cyanopterus, Sw.), it 

 is blue. 



The bird figured in Phillips, Voy. Bot. Bay, p. 267, pi. 40, is not 

 the Calyptorhynchus banksii (Lath.), but the C. cookii {Tern.). 



The name Cory don, Wagl., cannot stand, as it was pre-occupied in 

 1828 by Lesson (Man. Orn. vol. i. p. 177). A new name will 

 therefore be wanted for Cory don, Wagl. 



Psittacus nestor was, I believe, never published by Forster lander 

 the name of hypopolius, consequently the name meridionalis, Sm., 

 has the priority. 



The sub-families composing the family Picida, as arranged by Mr. 

 Gray, are not of equivalent value. The Bucconina, Picumnirm and 

 Yuncince form three groups apparently of equal value, and the Wood- 

 peckers form a fourth ; but the Picince, Dryocopinee, Celeince and Co- 



