1915] 
Pearse: Food of Small Shore Fishes 
15 
Perea flavescens (Mitchill). Yellow Perch. 
Station 5; August 17; No. examined, 5; (2 empty) length— max. 142, 
min. 95, ave. 115.4. 
Food — Chironomus larvae 6.6, Caddis-fly larvae 6.6, dipterous larvae 
33.3, Hyalella 20, Cyclops 8.3, Ostracoda 1.6, Cladocera 8.3. 
Summary — Insect larvae 46.5, Hyalella 20, Cyclops 8.1, Ostracoda 1.6, 
Cladocera 8.3. 
Station 6; September 5; No. examined, 7; length — max. Ill, min. 101, 
ave. 105. 
Food — Chironomus larvae 13.9, caddis-fly larvae 4.3, Corixa nymphs 
.9, midges 4.3, gnats .8, mites .6, Hyalella 55.7, Cyclops .5, Sida 13.9, Chy- 
dorus +, Camptocercus .1, plant tissue +, seeds .6, filamentous algae. 1. 
Summary — Insect larvae 19.1, Insecta 5.1, mites .6, Hyalella 55.7, Cyclops 
.5, Cladocera 14, plants .7. 
Grand Summary — No. examined, 16; length — max. 142, min. 95, ave. 
107.5. Food — Insect larvae 19.5, Insecta 2.7, mites .5, Hyalella 32.8, Cy- 
clops 2, Ostracoda .3, Cladocera 36.3, plants .3. 
Cottus ictalops (Rafinesque). Miller’s Thumb. 
Station 4; August 25; No. examined, 10; length — max. 73, min. 22.5, 
ave. 54.7. 
Food — May-fly nymphs 66, Chironomus larvae 6.6, dipterous larvae .5, 
midges 1.5, Hyalella 13.5, Ostracoda .5, Cyclops 1.5, Erbobdella punctata 
9, algal filaments .9. 
Summary — Insect larvae 73.1, insects 1.5, Hyalella 13.5, Ostracoda .5, 
Cyclops 1.5, Hirudinea 9, algae .9. 
Schilbeodes gyrinus (Mitchill). Tadpole Cat. 
Station 1; August 7; No. examined,' 5; length — max. 29.5, min. 20, ave. 
24.9. 
Food — Corixa nymphs 4, dipterous larvae 4, unidentified insects 4, 
Hyalella 4, Cyclops 62, Chydorus 1.2, Graptoleberis .4, plant tissue 4, 
algal filaments .2, unidentifiable 15. 
Ameiurus melas (Rafinesque). Black Bullhead. 
A specimen 44.5 mm. long, captured at the mouth of the river leading 
from Lake Monona on October 3, contained: 75% Chironomus larvae, 
20% Ostracoda, 4% Cyclops, and 1% Alona. Another 143.5 mm. long, 
taken on the next day in a lagoon on the isthmus between Lake Mendota 
and Lake Monona, had eaten: 5% Ceratopogon larvae, 5% midges, 3% 
Ostracods, 1% Cyclops, 1% unidentified Cladocera, 50% Bosmina, Arcella 
+, 34% plant tissue, 1% seeds. 
Summary — Dipterous larvae 40, midges 2.5, Ostracoda 1.2, Cyclops 2.5, 
Cladocera 26, Arcella +, plants 15.5. 
