482 Wisconsin Academy of Sciences, A7ds, and Letters. 
Table 9.— Comijarative Places of the Macrofauna of Lake Mendota. 
Expressed in percentages of bulk 100%). 
Name 
Seasonal (litt) 
Annual 
Estimate 
Type of food eaten 
May-July 
Aug.-Sept. 
Littoral 
Sponges . 
0.5 
0.5 
• 0.5 
Microphaga 
Bryoza . 
0.5 
0.5 
0.5 
Mierophaga 
Annelida .. 
5.0 
3.0 
2.0 
Microphaga, Scavengers 
Small 01igi)chaeta,.. 
2.0 
15.0 
10.0 
Microphaga 
Hirudinea . 
4.0 
3.0 
3.0 
Microphaga, blood 
Gastropoda ......... 
18.0 
13.0 
15.0 
Carnivores, Scavengers 
Lamellibranchia .... 
1.0 
2.0 
1.5 
Carnivores, Scavengers 
Crustacea . 
12.0 
10.0 
8.0 
Carnivores, Scavengers 
Hydrachnida . 
1.0 
6.0 
3.0 
Carnivores, parasites. 
Cannibals 
Odonata .. 
2.0 
0.5 
1.0 
Carnivores 
Ephemerida . 
4.0 
3.0 
3.0 
Microphaga, carnivores 
Plecoptera . 
1.0 
0.0 
0.5 
Carnivores 
Hcmiptera . 
1.0 
1.0 
1.0 
Carnivores 
Neuroptera . 
2.0 
1.0 
1.0 
Carnivores, Necrophagous 
Trichoptera 
Case-builders . 
5.0 
25.0 
32.0 
Phytophagous, Microphaga 
Hydroptilids . 
15.0 
1.0 
Phytophaga 
Lepidoptera . 
0.0 
0.5 
0.5 
Phytophaga 
Corethridae . 
5.0 
0.0 
0.5 
Carnivores, microphaga. 
S'c avengers 
Chironomidae . 
18.0 
14.0 
16.0 
Carnivores, microphaga 
cannibals, scavengers 
C’oleoptera . 
2.0 
1.0 
1.0 
Microphaga, or phytophaga. 
or carnivora 
Fish ... 
Microphaga, Carnivores 
