87 



Corneocyclas polita Sterki. 



Joliet, Will Co. (Handwerk) ; Illinois River, Havana, Mason 

 Co. (State Laboratory). 



Corneocyclas punctata Sterki. 



Lilycash Creek, Will Co. (Handwerk). 



Corneocyclas punctata simplex Sterki. 



Joliet, Will Co. (Ferriss, Handwerk). 



Corneocyclas roper i Sterki. 



Joliet, Will Co. (Handwerk, Sterki). 



Corneocyclas rotundata Prime. 

 Northern Illinois (Marsh). 



Corneocyclas sargenti Sterki. 



Illinois (Sterki) ; Cedar Lake, Lake Co. (State Laboratory). 



Corneocyclas scutellata Sterki. 



Lake Michigan, near Chicago, Cook Co. (Baker); Huntley, 

 McHenry Co. (Ferriss); Joliet, Will Co. (Handwerk); Fox and 

 Pistakee lakes, Lake Co. ; Lake Michigan, Cook Co. (State Lab- 

 oratory). 



Corneocyclas splendidula Sterki. 



Lilycash Creek, Will Co. (Handwerk) ; Sand and Cedar lakes? 

 Lake Co. (State Laboratory). 



Corneocyclas variabilis Prime. 



Lake Michigan, Cook Co. (Baker) ; Cook Co. (Baker, Jensen ) ; 

 Kankakee River (Ferriss); Du Page River (Gault) ; Lily- 

 cash Creek, Joliet, Will Co. (Handwerk); Winnebago Co. 

 (Hinkley); Mercer Co. (Marsh); Canton, Fulton Co. (Nason); 

 Fulton Co. (Wolf); Pistakee, Sand, Cedar, and Fox lakes, 

 Lake Co. ; Quiver Lake, and Illinois River, Havana, Mason Co. ; 

 Thompson's Lake, Fulton Co. (State Laboratory). 



Corneocyclas virginica Gmelin. 



Cook Co. ( Baker) ; Kankakee River (Ferriss); Joliet, Will 

 Co. (Ferriss, Handwerk); Lilycash Creek, Will Co. (Hand- 

 werk) ; Little Wabash River (Hinkley); Winnebago Co. 

 (Marsh). 



Corneocyclas walkeri Sterki. 



Joliet, Will Co.; Du Page River ( Ferriss) ; Lilycash Creek, 

 Will Co. (Handwerk). 



