8 '2 Illinois State Laboratory of Natural History. 



Plate XY. 



Fig. 1. Last two segments of antenna of (Jyclops ater Ilerrick. 



Fig. 2. Fifth foot of same. 



Fig. 3. Receptaculum seminis of same. 



Fig. 4. Cyclops modestus Herrick. 



Plate XYI. 



Fig. 1. Antenna of Cyclops modestus Herrick. 



Fig. 2. Fiftli foot of same. 



Fig. 3. Receptaculum seminis of same. 



Plate XYII. 



Cyclops se.rrulatus Fischer. 



Plate XYIII. 



Fig. 1. Cyclops serrulatus Fischer. 



Fig. 2. Fifth foot of same. 



Fig. 3. Receptaculum seminis of same. 



Plate XIX. 



Fig. 1. C'//cto/)s j3ra.sm»;.s' Fischer. 

 Fig. 2. Antenna of same. 



Plate XX. 



Fig. 1. Fifth foot of Cyclops prasinus Y'lin^hQV. 

 Fi(r. 2. Receptaculum seminis of same. 

 Fig. 3. Cyclops phaleratus Koch. 



