FISHES OF THREE WISCONSIN LAKES 47 



age 90. Food: chironomid larvae 49.1; mayfly nymphs 13; 

 caddis fly larvae 1.3; Leptocerus larvae and cases .3; beetle lar- 

 vae .3; Psephenus larvae 1.9; chironomid pupae 1.6; mites .1; 

 Hyalella 5; snails 22.6; Ancylus .3; Sphaeridae 2.3; oligochaetes 

 .6; Chara .3; seeds .1; filamentous algae .1; sedimentary debris 

 1.3. 



Esox lucius Linnaeus, pickerel 



Nine pickerel were examined, August 13-26. Length: 415-645; 

 average 615. Food: fish 833; ciscoes 16.7. Three individuals 

 contained no food. 



Leucichthys artedisisco Jordan, cisco 



Twelve ciscoes were examined, August 24, 25. Length: 

 200-248; average 225. Food: Daphnia 88; Cyclops 11; Sphaeri- 

 dae 1. Two individuals contained no food. 



Lepomis incisor Cuvier and Valenciennes, bluegill 

 One adult, 153 mm. in length was examined, August 14. It 



had eaten: chironomid larvae 2; plants 98. 



Eleven small bluegills were examined, August 9-17. Length : 



64-84; average 69. Food: insect eggs .1; chironomid larvae 53; 



chironomid larvae in tubes 3.6; mayfly nymphs .1; Agraylea 



larvae and cases 5; Psephenus larvae 6; chironomid pupae 1.7; 



insects 2.3; Plea-}-; midges .9; beetles .9; mites 5.5; spiders .5; 



Hyalella 12.5; Daphnia 7.5; Pleuroxus .1; Bosmina .1; ostracods 



.4; snails .1 ; plants .1 ; Arcella-like seeds .1 ; filamentous algae .5; 



sand 2; sedimentary debris .5. 



Micropterus dolomieu Lacepede, smallmouth black bass 

 Twenty smallmouth bass over 100 mm. in length were ex- 

 amined, August 10-25. Length 105-350; average 220. Food: 

 fish 23.2; perch 11.9; mayfly nymphs 7.4; Sialis nymphs 1.9; 

 insects 18.1; bugs 1.4; mayflies 6.9; beetles 3.4; crane fly .4; 

 crayfishes 21.9; Leptodora .4; Ceratophyllum .1; unknown 3.1. 

 Four individuals contained no food. 



One individual, 95 mm. long, was examined August 10. It 

 had eaten: Mayfly nymphs 20; midges 80. 



Micropterus salmoides (Lacepede), large mouth black bass 



Five adults were examined, August 12-23. Length: 185- 

 322; average 256. Food: fish 53; chironomid pupae 2; mayflies 

 20; crayfishes 20; plants 5. 



