8 PREFACE. 



the work ; and also the great personal kindness in the 

 way of friendly entertainment, on the part of a large 

 circle of friends, during many years of travel and inves- 

 tigation over different parts of the field under review. 



The illustrations, which should add much to the character 

 of the book, have been nearly all furnished by Dr. Coues, 

 whose scientific nomenclature, as given in his former works, 

 I have adopted throughout. On this subject, now so much 

 in distress, I claim no authority; and those wishing the 

 check-list of the Smithsonian Institution can easily procure 



it. 



J. H. LANGILLE. 



June 26th, 1884. 



Buffalo, N. Y. 



