94 ILLINOIS BIOLOGICAL MONOGRAPHS [312 



PLATE III 



Fig. 6. Cydocoelum wilsoni, ventral view. X 12. 

 Fig. 7. Cydocoelum cuneatum, dorsal view. X 12. 

 Fig. 8. Cydocoelum obscurum, ventral view. X 17. 



