92 LIMN^A. 



Northern Maine; St. Lawrence Eiver, 

 English River, British America; Hellgate 

 River and Fort Vancouver, Oregon. 



This remarkable species, the American ana- 

 logue of L. auricularia, will doubtless be found 

 an inhabitant of the vicinity of the boundary 

 line between the United States and British 

 North America throughout its entire extent. 



I merge it in my L. Binneyi, and also the 

 two Oregon specimens figured by Haldeman, 

 Plate 14, figs. 4, 5. Without doubt the speci- 

 men figured by Binney (f 10) as Sumassi, 

 Baird ?, belongs also to this species. 



Subgenus AURICULA, Klein. 



6. LIMN^A STAGNALIS, Linn. 



Hald., 16, t. 4, L. jugularis, Say. 



Hald., 18, t. 5, L. appressa, Say, 



Plate 16, fig. 11. 



This very fine species inhabits our whole 

 north-western frontier States from Ohio to 

 (66) 



