144 PROCEEDINGS OP THE AMERICAN ACADEMY 



Hab. Neighborhood of Toronto, Province of Ontario ; New 

 York, Maryland, Virginia, Illinois. 



24. Cambarus acuminatus. 



Cambarus acuminatus, Faxon, supra, p. 113. 

 Hab. Saluda River, South Carolina; Western North Caro- 

 lina. 



25. Cambarus latimanus. 



? Astacus ( Cambarus) Bartonii, Erichson, op. cit., p. 97. 1846. 



Astacus latimanus, Le Conte, op. cit., p. 402. 1855. 



Cambarus latimanus, Hagen, op. cit., p. 83, PI. I. figs. 43-46, 

 PL III. fig. 162. 1870. 



Hab. South Carolina, Georgia, Alabama, Mississippi, Ten- 

 nessee (var.). 



Erichson's types of C. Bartonii were examined by Dr. Hagen 

 in 1870, and judged to be C. latimanus. 



26. Cambarus Diogenes. 



Cambarus Diogenes, Girard, op. cit., p. 88. 1852. 



Cambarus obesus, Hagen, op. cit., p. 81, PI. I. figs. 39-42, PI. 

 III. fig. 163, PI. IX. 1870. 



Hab. New Jersey, Maryland, District of Columbia, Virginia, 

 North Carolina, Ohio, Indiana, Illinois, Michigan, Wisconsin, 

 Iowa, Missouri, Kansas, Colorado, Wyoming, Arkansas, Ken- 

 tucky? Mississippi. 



The labels of specimens, probably types, of C. propinquus 

 and C. Diogenes, in the Philadelphia Academy, have been 

 transposed. 

 Var. Ludoviciana. 



Hab. Louisiana. 



This variety, received from New Orleans, differs in having a 

 narrower rostrum, with parallel margins, and more acute tip. 



The burrowing habits of C. Diogenes are described by Girard, 

 I. c, and recently by R. S. Tarr in Nature, XXX. 127, and 

 C. C. Abbott in Amer. Nat., XVIII. 1157. The curious "chim- 

 neys " at the mouth of the burrows are figured by Audubon, Birds 

 of America, PI. 360, 370 (4to ed.). 



27. Cambarus argillicola. 



Cambarus argillicola, Faxon, supra, p. 115. 

 Hab. Toronto, Province of Ontario ; Michigan, Indiana, Loui- 

 siana? North Carolina? 



