WATER BEETLES IN RELATION TO PONDFISH CULTURE. 



263 



BEETLE DISTRIBUTION IN FAIRPORT FISHPONDS. 



The first of the two following tables shows how the beetles were distributed 

 in the various ponds at Fairport, Iowa; the second shows how they were distrib- 

 uted according to beetle families. 



Beetle distribution in the Fairport (Iowa) fishponds. 

 [a, abundant; c, common; f, few in nimiber; r, rare. *See text, p. 264.] 



Pond number and series. 



Beetle species. 



12 

 B 



13 

 B 



14 

 B 



15 

 B 



16 

 B 



1 

 D 



2 

 D 



3 

 D 



4 

 D 



5 

 D 



6 

 D 



7 

 D 



8 

 D 



9 

 D 



1 



E 



2 



E 



3 

 E 



4 

 E 



1 

 F 



2 

 F 



3 

 F 



Haliplidse: 













r 



f 



a 



c 



f 



c 



0 



r 

 r 



c 

 r 

 f 



c 

 r 

 f 





c 





































r 



r 



r 



r 







c 



a 



c 



r 

 r 

 c 



r 

 r 

 f 





r 



r 

 r 



c 



c 

 r 



r 

 r 



c 



c 



r 

 r 



c 



c 



r 



r 



.... 







r 



I 



c 



I 



c 



c 



0 



c 

 a 

 r 



c 



a 

 r 





c 



a 

 r 

 r 



c 



a 

 f 

 r 





c 



0 



f 



r 



r 



Dytiscidae: 













r 



r 



r 

 r 







r 













f 











r 

















r 

 r 



r 



c 

 f 















a 



a 







f 



r 



c 

 a 



r 









r 







r 



r 



r 

 c 

 r 

 f 



0 



r 











r 











r 

 c 

 a 

 f 

 f 



r 

 r 

 r 

 c 

 r 

 f 



















r 

 r 





c 



r 



c 

 r 



c 

 r 





c 

 r 



c 

 r 



c 



c 



c 

 a 



r 



a 



a 







r 



























a 





c 





c 



c 



c 





r 



c 





a 



c 



c 



.... 



r 



r 







































































r 



r 





















r 









c 



r 

 r 

 r 



r 

 r 

 r 











r 





















r 

 f 



r 

 r 





r 



r 













r 



















































r 



a 

 a 



a 

 a 



r 



a 

 a 











a 

 f 



c 



a 



I 



a 



a 



a 

 a 

 r 



a 

 a 



a 

 a 



a 

 a 





a 

 a 



a 

 a 



c 



a 

 a 



c 

 c 



a 

 c 



a 



Laccophilus proximus 















Thermonectes basilaris 



r 



a 



a 

















r 

 r 



a 







f 

 r 



a 







r 



c 



a 



r 

 r 



a 



r 



c 



a 









Thennonectes ornaticollis* 























a 



r 



a 









Gyrinidae: 



a 



c 



c 



a 





a 



a 



a 



a 



a 



c 

 r 



c 

 r 

 r 



c 

 r 



















r 



c 



c 

 c 

 c 



r 



r 





r 



r 







a 



r 



r 





















Gyrinus ventralis 















r 



c 



r 



r 





r 



f 



r 







r 

 r 



a 



r 

 r 

 r 

 r 











Hydrophilidse: 

















r 







r 













r 



a 



















r 



r 



a 



r 



a 



a 



a 

 r 

 r 



r 

 a 





a 



a 



r 



a 







a 



f 



























r 



r 



a 

 r 



c 

 f 



r 



a 



r 



r 



a 



































r 



r 



a 



r 





















r 



f 



a 



f 



r 



f 



f 





r 



r 



r 



f 



r 



r 







c 



c 



r 









r 



a 



r 



f 

 a 



r 



a 

 r 



c 



a 



r 











r 



r 















a 





























































r 







































r 

 r 











































































a 

 c 















c 

 c 



r 



c 

 r 

 c 

 a 

 f 

 c 





r 



c 



r 



c 





r 



c 



a 

 a 



0 



c 



r 



0 











f 



r 



r 



r 

 r 

 c 

 a 



c 



c 



e 



r 



a 



c 



Laccobius agilis* 



Tropistemus glaber 



a 

 a 

 c 



r 



a 



r 



r 



a 



c 

 a 



c 

 a 



c 

 a 



e 

 a 





0 



a 

 r 

 c 



c 

 a 

 r 

 e 



0 



c 



c 

 c 



c 

 a 



0 



a 



c 

 a 



0 



c 



c 

 c 



0 



c 





Tropistemus mixtus* 











c 



c 



c 



c 



c 



c 



c 



c 



c 



c 



















