PSITTACIFORMES. 
leaving the genus Stringops alone in the Stringopidce. A peculiar feature in 
my classification is the establishment of the family Cyclopsittacidse, which 
is not equivalent with Dr. Reichenow’s Micropsittacinse. The under-surface 
of the hook of the bill, without file-like sculpture in the species of the genera 
Neopsittacus and Cyclopsittacus, separates them from all the other Psittaci 
proprii and approaches them to the Psittaci orthognathi ; when the structure 
of their tongue is known, we shall be able to understand better their true 
affinities. 
“ Although I think that the families and subfamilies admitted by me 
are fairly definable, I must confess that my arrangement does not bring us 
nearer to an understanding of the mutual or phylogenetic relations of the 
different families. A complete study of the internal structure of the Parrots 
will, perhaps, throw the requisite light on the subject.” 
As Salvadori’s arrangement has been generally accepted by systematic 
workers for the last twenty-five years, I here reproduce his scheme, naming 
the Australian genera adopted by him. 
Order Psittaci. 
Family Nestoridse. 
Family Loriidse 
Family Cyclopsittacidse 
Family Cacatuidse. 
Subfamily Cacatuinse 
Subfamily Calopsittacinse . . 
Family Psittacidse. 
Subfamily Nasiterninse. 
Conurinse. 
Pioninse. 
Psittacinse. 
Palseornithinse . . 
Subfamily Platycercinse 
Family Stringopidse. 
Trichogbssus, Psitteuteles, Ptilosclera , 
Glossopsittacus. 
Cyclopsittacus. 
Microgbssus, Calyptorhynckus, CaUo- 
cephalon , Cacatua, Licmetis. 
Calopsittacus. 
Eclectus , Geoffroyus, Polytelis , Ptistes, 
Aprosmictus. 
Pbtycercus, Porphyrocephalus , Barnardius, 
Psephotus, Neophema, N anodes, Melop- 
sittacus, Pezoporus, Geopsittacus. 
5 
