DELAWARE VALLEY ORNITHOLOGICAL CLUB. 33 



PENNSYLVANIA. 



Charles J. Pennock, Kennett Square. 

 Mrs. Katharine R. Styer, Concordville. 

 G. W. Trimble, Lenape. 

 William Carter, Lenape. 

 J. K. Brown, Jr., Westtown. 

 Edith Smedley, Westtown. 

 Hugh E. Stone, Coatesville. 

 Howard Y. Pennell, M. D., Downingtown. 

 Frank L. Burns, Berwyn. 

 John D. Carter, Haverford. 

 Miss Dorothy Farnum, Rosemont to Haverford. 

 William L. Baily, Ardmore. 

 William J. Serrill, Ardmore. 

 Miss Emily Hinds Thomas, Bryn Mawr. 

 James F. Prendergast, M. D., West Fairmount Park. 

 William E. Hannum, Swarthmore. 

 William E. Roberts, Swarthmore. 

 Samuel C. Palmer, Swarthmore. 

 L. I. Smith, Jr., Tinicum. 

 Fredk. N. Owen, Mt. Moriah. 

 Aldrich J. Pennock, Lansdowne. 

 Anna D. White, Lansdowne. 

 Harold Evans, Germantown. 

 Frank Miles Day, Germantown. 

 Samuel Mason, Jr., Germantown. 

 William H. Trotter, Chestnut Hill. 

 George S. Morris, Olnej'. 

 Thomas D. Keim, Bristol. 



Edward Pickering, Jr., Woodbourne, Bucks Co. 

 Otto McCreary, George School, Newtown. 

 Albert C. Rutter, Perkasie. 

 W. H. Buller, Marietta. 

 William A. Kelker, Harrisburg. 

 August Koch, Williamsport. 



In a limited area two phases of migration may be studied: 

 1st. The fluctuation in the number of birds both as to Individ- 



