71 



MESOGENvE. 



Genus Oyprogenia Agassiz. 

 Cyprogenia irrorata Lea (=stegaria Say). 



Mt. Carmel, Wabash Co. (Calkins); Wabash River (Hinkley, 

 Marsh); Southern Illinois (Ulffers). 



Genus Obliquarta (Rafinesque) Simpson. 

 Obliqaaria retfexa Rafinesque {—cornuta Barnes). 



Savanna, Carroll Co. (Baker) ; Cook Co. (Baker, Calkins) ; 

 Northern Illinois; Mt. Carmel, Wabash Co. (Calkins); Kanka- 

 kee River (Ferriss, Handwerk) ; Shawneetown, Gallatin Co. 

 (Fischer); Meredosia, Morgan Co. (Gault); Illinois River 

 (Handwerk, Kelly, Ferriss, Strode) ; Mississippi River, Quincy, 

 Adams Co. (Hart) ; Little Wabash, Big Muddy, and Ohio riv- 

 ers (Hinkley) ; La Salle Co. (Huett) ; Mercer Co., Mississippi 

 River (Marsh) ; Athens, Menard Co; Mississippi River, Quincy, 

 Adams Co. (Nason) ; Spoon River (Strode) ; Southern Illinois 

 (Ulffers) ; Fulton Co. (Wolf) ; Havana, Mason Co. (State Lab- 

 oratory). 



PTYCHOGENiE. 



Genus Ptychobranchus Simpson. 



Ptychobranclms phaseolus Hildreth. 



Wabash River (Hinkley, Marsh) ; Southern Illinois (Ulffers). 



ESCHATIGENiE. 



Genus Dromus Simpson. 



Droinus droinus Lea. 



Ohio River (Marsh). 



DIAGENiE. 



Genus Strophitus Rafinesque. 



Strophitus edentuhis Say {=8hafferiana Lea, wardiana Lea). 



Oregon, Ogle Co. ; Savanna, Carroll Co. (Baker) ; Cook Co. 

 (Baker, Higley, Jensen, Lyon); Northern Illinois (Calkins) ; 

 Peoria, Peoria Co. (Chamberlain) ; Hickory Creek, Will Co. 

 (Ferriss, Handwerk) ; Du Page River (Gault) ; Desplaines Riv- 

 er (Handwerk); Rockford, Winnebago Co.; Kaskaskia and 

 Wabash rivers (Hinkley) ; La Salle Co. (Huett) ; Illinois Riv- 

 er (Kelly, Nason); Mercer Co.; Mississippi and Wabash riv- 

 ers (Marsh) ; Fox River, Dundee, Kane Co., and Algonquin, 



