VI PREFACE. 



Committee on Publication, who have continually aided him with 

 their assistance and advice. 



To Dr. C. Hart Merriam his thanks are also due for the permission 

 to examine the lists of birds, known to breed at various points in Penn- 

 sylvania and New Jersey, which have been compiled by correspond- 

 ents of the U. S. Department of Agriculture: to Dr. Edward J. 

 Nolan, Librarian of the Academy of Natural Sciences of Piiiladel- 

 phia, for permission to publish the portrait of Alexander Wilson, 

 which appears as a frontispiece ; also to Dr. J. A. Allen and Mr. 

 Frank M. Chapman, of the American Museum of Natural History, 

 Mr. Robert Ridgway of the U. S. National Museum, and to the 

 many correspondents in various parts of Pennsylvania and New 

 Jersey — especially Messrs. August Koch, Josiah Hoopes, Philip 

 Laurent, Prof. H. J. Roddy and Dr. J. W. Detwiler, who have so 

 Courteously rendered their assistance in the preparation of the pres- 

 ent volume. 



WiTMER Stone. 



Academy of Natural Sciences, 

 Philadelphia, November G, 1894. 



