There are five well-marked species of this genus, each of wliich appears to inhahit a 

 different region, namely : — 



a. Sp. ventre transfasciato : rostro nigricante. 



1. X. alUcollis (Vieill.) of S. E. Brazil. 



2. JC! promeropirTiynchus (Less.) of New Granada, Ecuador, Peru and Bolivia. 



h. Sp. ventre concolore : rostro albicante. 



3. X. proeei-us, Cab. et Hein. of Venezuela. 



4. X. emigrans, Scl. et Salv. of Mexico and Guatemala. 



5. X. major (Vieill.) of Paraguay and Bolivia. 



For the synonymy of these birds we refer our readers to Sclater's American Catalogue. 

 Dendrocolaptes 'perroti^ of Lafi'esnaye, which has been hitherto placed in this genus, is very 

 aberrant in the shape of its bill, and may, we now think, be better arranged along with 

 Dendrocolaptes temminckv^Lafr.^ in the genus Dendrexetastes^ Eyton. y 



/ 



Dtfcembee, 1867. 



[72] 



