PAUL B. SEARS, VICE-PRESIDENT         WILLIAM A. DREYER, SECRETARY 
 
 
         ECOLOGICAL SOCIETY OF AMERICA 
 
 
                                       OFFICE OF THE SECRETARY 
                                       DEPARTMENT OF ZOOLOGY 
                                       UNIVERSITY OF CINCINNATI 
                                         CINCINNATI 21, OHIO 
 
 
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ALDO LEOPOLD. PRESIDENT 
 
 
HENRY J. OOSTING. TREASURER