90 NEW YORK STATE MUSEUM 



Pennsylvania. 



Allegheny river, Warren county Beecher. 



Ohio. 



Ohio river system Sterki. 



Michigan. 



Rouge river, Wayne county Walker. 



Grand river, Kent county Walker. 



Indiana. 



St. Joseph river Walker. 



White river Beecher. 



Illinois. 



Winnebago county Hinkley. 



Wisconsin. 



Marsh. 



Minnesota. 



Marsh. 



Iowa. 



Des Moines river , Walker. 



Kansas. 



Eastern part Quintard. 



Missouri. 



Marsh. 



Widely distributed in the St. Lawrence and Mississippi drain- 

 age systems. In the eastern system it has been reported from 

 Mohawk and Utica, just within the border of the system. 



" On April 17, 1877, the writer, while exploring that portion 

 of the Erie canal known as the Wide Water, near Mohawk, 

 N. Y., unexpectedly came across TJnio rubiginosus, Lea. Five 

 specimens in all were secured during this and two succeeding 

 expeditions. The species has not hitherto been found on the 

 Atlantic slope, but belongs to the Ohio basin, and, hence, to the 

 western fauna. It has been recorded at Buffalo {teste Prof. C. 

 Dewey), and at Eochester {teste C. T. Robinson), in Western 

 New York, but only in streams flowing into the great lakes. 

 Between Mohawk and the latter localities is a water shed slop- 

 ing to the west and the east. The Erie canal passes over this 

 ridge, and through it the species has probably been introduced 

 and colonized." (R. Ellsworth Call, Amer. Nat., p. 472, 1878.) 



