xxiv INTRODUCTION. 



The following ten genera, mostly monotypic, are, so far as we know 

 at present, restricted to the limits of the Argentine Avifauna or its 

 immediate confines : Donacospiza and Saltatricula (FringillidaB) ; 

 Coryphistera, Anumbius, Limnornis, and Drymornis (Dendrocolaptidae) ; 

 RMnocrypta, with two species (Pteroptochidse) ; Spiziapteryx (Falco- 

 nidae) ; Chunga (Cariamidse) ; and Calodromas (Tinamidse) . 



