FISHES OF THREE WISCONSIN LAKES 33 



cases .5; chironomid pupae 3.2; insects 4.2; beetle .1; crayfishes 

 4.5; Hyalella + ; Cladocerans 1.8; Daphnia 12; Chydorus -f; 

 Leptodora 6.1; ostracods .1; oligochaetes .2; Difflugia +; plants 

 3.2; seeds .5; Wolffia .1; Closterium + ; filamentous algae 34.5; 

 diatoms .3; sand .2; bottom sediment .5. One specimen con- 

 tained no food. 



Icthyomyzon concolor (Kirtland), silver lamprey 

 A specimen 206 mm. long which was taken from a spoon- 

 bill on July 3 contained no food. 



Ictiobus bulbalis (Rafmesque), smallmouth buffalo 

 A specimen 323 mm. long taken in a commercial seine on 

 June 30 contained the following food: chironomid larvae 3; 

 Hyalella 10; Acroperus 1; ostracods 61; Cyclops 1; Planorbis 

 bicarinatus 2; Sphaeridae 15; plants 5; sand 2. 



Ictiobus cyprinella (Cuvier and Valenciennes), redmouth buffalo 

 One individual 311 mm. long was caught in a commercial 

 seine on July 12. Its food consisted of Daphnia 99; Planorbis 

 .6; Difflugia .1; filamentous algae .3. 



Ictiobus urus (Agassiz), mongrel buffalo 

 An individual 332 mm. long was examined on June 26, but 

 contained no food. 



Lepisosteus osseus (Linnaeus), long-nosed gar 

 Two specimens were examined, June 26, July 2. Lengths: 

 625, 743. Food: fish 92.5; Daphnia (perhaps from fishes eaten) 

 7.5. 



Lepisosteus platostomus Rafinesque, short-nosed gar 

 Three gars caught in the slews connecting into Lake Pepin 

 were examined on July 5, 6, and 11. Lengths: 424-522; average 

 475. Food: fish 3.3; crayfishes 96.7. 



Leptopus olivaris (Rafinesque), mud-cat 

 A mud cat 420 mm. long was taken from a commercial 

 seine on June 27. It contained no food. 



Lepomis incisor Cuvier and Valenciennes, bluegill 

 Ten specimens were examined, June 29 to July 12. Length: 

 97-208; average 136. Food: fish .5; chironomid larvae 2.5; 



