83 



and Pistakee lakes, Lake Co. ; Lake Michigan, Chicago, Cook 

 Co.; Milan, Rock Island Co. (State Laboratory). 



Sphcerium stamineum forhesi Baker. 



Thompson's Lake, Fulton Co. ; Matanzas Lake, Havana, 

 Mason Co.; Little Fox River, White Co. (State Laboratory). 



Sphcerium striatinum Lamarck. 



Cook Co. (Baker, Calkins, Higley, Nason); Joliet, Will Co. 

 (Baker, Ferriss, Handwerk ) ; Northern Illinois ( Calkins ) ; Stark 

 Co. (Chase) ; Hickory Creek, Will Co. (Ferriss) ; Lilycash Creek, 

 Will Co. (Handwerk); Quincy, Adams Co.; Kappa, Woodford 

 Co. (Hart); Winnebago Co.; Big Muddy, Little Muddy, Wa- 

 bash, and Ohio rivers, (Hinkley); La Salle Co. (Huett); 

 Union Co. (Lyon) ; Mercer Co. ; McLean Co. (Marsh) ; Illinois 

 River and Quiver Lake, Havana, Mason Co. ; Milan, Rock Island 

 Co. ; Urbana, Champaign Co. ; Panola, Woodford Co. ; Fulton 

 Co. ; Grand Pierre Creek, Herod, Pope Co. ; Peoria, Peoria Co. ; 

 Long and Cedar lakes, Lake Co. ; Chicago, Lake Michigan, Cook 

 Co. ; Kickapoo Creek, Coles Co. ; Swanwick Creek, Perry Co. ; 

 Henderson Creek, Biggsville, Henderson Co. (State Laboratory). 



Sphcerium simile Say (= sulcatum Lamarck). 



Cook Co. (Baker, Calkins) ; Northern Illinois (Calkins) ; Kan- 

 kakee River (Ferriss); Lilycash Creek, Will Co. (Handwerk); 

 Winnebago Co. (Hinkley); La Salle Co. ( Huett) ; Mercer, 

 McLean, and Edgar counties (Marsh) ; Elmhurst, Du Page Co. ; 

 Elgin, Kane Co. ; Algonquin, McHenry Co. ; Rock River 

 (Nason) ; Southern Illinois ( Ulff'ers ) ; Sand, Clear, Fox, Pistakee, 

 and Cedar lakes, Lake Co. ; Lake Michigan, Chicago, Lake Co. ; 

 Warsaw, Hancock Co. (State Laboratory). 



Sphcerium lilycashense Baker. 



Lilycash Creek, Joliet, Will Co. (Baker, Ferriss, Handwerk). 



Sphcerium fabale Prime. 



Cook Co. (Baker, State Laboratory); Kankakee Feeder (Fer- 

 riss); Illinois (Prime). 



Sphcerimn occiclentale Prime. 



Cook Co. (Baker, Higley, Jensen); Northern Illinois (Calk- 

 ins); Joliet, Will Co. (Ferriss, Handwerk): Winnebago Co. 

 and Little Muddy Creek (Hinkley); La Salle Co. (Huett): 

 Bush Park, Mercer Co. (Marsh); Fulton Co. (Wolf); Pistakee 

 Lake, Lake Co. (State Laboratory). 



