WATER BEETLES IN RELATION TO PONDFISH CUL- 

 TURE, WITH LIFE HISTORIES OF THOSE FOUND IN 



FISHPONDS AT FAIRPORT, IOWA : By Charles Branch Wilson 



From BULLETIN OF THE BUREAU OF FISHERIES, Vol. XXXIX, 1923-24 



Document No. 95 j 



PRICE, 30 CENTS 



Sold only by the Superintendent of Documents, Government Printing Oflfice, Washington, D. C. 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1923 



