BULLETIN 
OF THE 
Wisconsin Natural History 
Society 
VOLUME XI 
(NEW SERIES) 
PUBLISHED WITH THE COOPERATION 
OF THE 
Public Museum of the City of Milwaukee 
EDITOR: 
RICHARD A. MUTTKOWSKI 
ASSOCIATE EDITORS: 
P. H. DERNEHL HOWLAND RUSSEL EDGAR E. TELLER 
WAVERLY PRESS 
BALTIMORE, MD. 
