6 THE AMERICAN PARROTS OF 



in 1832) should be restricted to the American species for the reception 

 of which it was originally instituted — i. e. Psittacus menstruus of Linnaeus and 

 its allies, which form the second division of Dr. Finsch's genus Pionias 

 (Papag. ii. p. 373). From these, however, I would moreover exclude 

 Ps. accipitrmus as a peculiar form which should remain isolated under 

 Wagler's title, Deroptyus. 



There remain, then, according to Dr. Finsch's views, eight species in 

 this section. But, as I shall presently show. Dr. Finsch has in one case 

 united two very distinct species under the same title. The true number of 

 species of Pionus at present known to science is therefore, according to my 

 views, nine. 



Dividing these into two groups according to the colour of the primaries, 

 as proposed by Dr. Finsch, we may separate the nine species, by their most 

 obvious external characters, as follows : — 



a. Remigibus viridibus. 



a', pileo caeruleo 1. menstruus. 



3. maximiliani. 

 b'. pileo viridi 3. sordidus. 



4. corallinus. 



c' . pileo albo 5. seniloides*. 



d'. pileo rubro 6. tumultuosus. 



b. Remigibus cseruleis. 



e'. pileo dorso discolori, albo "^7. senilis. 



f. pUeo dorso concolori, fusco 8. violaceus. 



g' . pileo dorso concolori, purpureo .... 9. chalcopterus. 



The range of these species in the Neotropical Region may be conveniently 

 shown as follows : — 



* Pionias gerontodes, Finsch, Papag. ii. p. 455, the name seniloides being rejected as a vox 

 hybrida. 



