Bangs What is Icterus Gualanensis Underwood? 169 



devised. He includes and describes each under the genus to 

 which it belongs, but gives it no number. Thus all can be 

 found in his review, and their supposed characters studied, but 

 their inclusion does not augment the number of recognizable 

 species in the genus or the family. 



Many other instances of the kind occur in other groups of 

 birds ; a very striking case being in the genus Ramphocelus, 

 where R. chrysopterus Boucard, R. inexpectatus Rothsch., R. 

 dunstalli Rothsch. and R. festde Salvadori, all from Panama, and 

 R. uropygialis Bonap. from Guatemala, rest each on the strength 

 of a single peculiar individual. Panama has been so thoroughly 

 overhauled and its tanagers collected in such series, that surely 

 if any of these four supposed species were other than ' ' freaks ' ' 

 or hybrids, additional examples must have turned up. 



