LIST OF ILLUSTRATIONS. 



PLATE XV. . 



1. Herring Gull (summer). 



2. Herring Gull (young, in 



winter). 



3. Laughing Gull (young). 



4. Common Tern. 



OPP. PACK 



. 269 



5. Herring Gull (winter). 



0. Bonaparte's Gull. 



7. Dovekie. 



8. Wilson's Petrel. 



The birds contained in these plates have been adapted and grouped 

 from Audubon's "Birds of America," Dr. Warren's "Birds of Penn- 

 sylvania," De Kay's "Ornithology of the State of New York," and 

 from Mr. J. L. Kidgway's illustrations to Dr. A. K. Fisher's "Hawks 

 and Owls of the United States." 



xii 



