PREFACE TO THE FIRST VOLUME. 



THE present volume contains an account of the Passeres of the 

 Argentine Republic, which, as at present known, number some 

 229 species. The second volume, which it is hoped will be 

 ready in the course of next year, will be devoted to the history 

 of the remaining Orders of Birds, and will also contain the 

 Introduction and Index, and complete the work. 



All the personal observations recorded in these pages are 

 due to Mr. Hudson, while I am responsible for the arrange- 

 ment, nomenclature, and scientific portions of the work. 



I have to acknowledge with many thanks a donation of 40 

 from the Royal Society, which has enabled Mr. Hudson to devote 

 a portion of his time to the compilation of his interesting notes. 



P. L. S. 



December 1, 1887. 



