AMNICOLA. 51 



Genus AMNICOLA, Gould & Haldeman. 

 A. Species of the Atlantic and Middle States. 



1. AMNICOLA PORATA, Saij. 

 Hald., p. 13, t. 1, fig. 8. 



It is by no means certain that this species is 

 distinct from A. liinosa, Say. Haldeman's 

 figure 6, " limosa,^^ I have always regarded as 

 a form of porata, but the forms vary so much 

 that the distinction appears to be quite arbi- 

 trary. The species or form porata inhabits 

 from New York to Utah, and far northward 

 into British America, but it does not appear to 

 extend into the Southern States ; indeed, the 

 genus appears to be nearly restricted to the 

 area north of the Ohio River. 

 (32) 



