1128 Wisconsin Academy of Sciences, Arts, and Letters. 



EXPLANATION OF PLATE LXXVIII. 



Fig. 1. Cyclops modestus; female (x 103). 



Fig. 2. Cyclops modestus; first antenna of female (x 212). 



Fig. 3. Cyclops modestus; fifth foot (x 340). 



Fig. 4. Cyclops modestus; abdomen of female (x 212). 



Fig. 5. Cyclops serrulatus; fifteenth, sixteenth, and seventeenth seg- 

 ments of antenna of female (x 340). 



Fig. 6. Cyclops serrulatus ; abdomen of female, slender form var. ele- 

 gans (x 103). 



Fig. 7. Cyclops serrulatus; abdomen of female, most common form 

 (x 103). 



Fig. 8. Cyclops serrulatus; fifth foot (x 475). 



Fig. 9. Cyclops serrulatus; receptaculum seminis (x 212). 



