148 PROCEEDINGS OF THE AMERICAN ACADEMY 



kota, Minnesota, Wisconsin, Iowa, Nebraska, Wyoming, Kansas, 

 Missouri, Illinois, Indiana, Tennessee, Texas, New York? 



I have examined the types of all the authors cited in the above 

 synonymy. 



49. Cambarus rusticus. 



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



Cambarus rusticus, Ilagen, op. cit., p. 71, PL I. figs. 80-83, 

 PI. III. fig. 161. 1870. 



Cambarus placidus, Hagen, op. cit., p. 65, PI. I. figs. 76-79, 

 PI. III. fig. 158. 



Cambarus juvenilis, Ilagen, op. cit., p. 66, PI. I. figs. 29-33, 

 PL III. fig. 157. 



Cambarus Wisconsinensis, Buudy, Bull. 111. Mus. Nat. Hist., 

 No. I. p. 4. 1876. — Trans. Wis. Acad. Sci., V. 181. 1882. — 

 Geol. Wis., Surv. 1873-1879, I. 402. 1883. 



Hab. Pennsylvania, Ohio, Indiana, Illinois, Kentucky, Ten- 

 nessee, Lake Superior, Wisconsin, Iowa, Missouri, Texas. 



Among the large amount of material before me I find so many 

 specimens that combine characters belonging to Hagen's three 

 species, C. rusticus, C. placidus, and C. juvenilis, that I am led 

 to consider them all as varieties or forms of C. rusticus. A 

 type, male, form II., of C. Wisconsinensis, from Racine, Wis., 

 received from Mr. Bundy, agrees pretty closely with the form 

 C. placidus. 



50. Cambarus spinosus. 



Cambarus spinosus, Bundy, Proc. Acad. Nat. Sci. Phila., 

 1877, p. 173. 



Hab. Saluda River, South Carolina ; neighborhood of Rome, 

 Georgia ; Tennessee River, near border of Georgia ; Lauderdale 

 Co., Alabama. 



51. Cambarus Putnami. 



Cambarus Putnami, Faxon, supra, p. 131. 

 Hab. Kentucky, Tennessee, Indiana? 



52. Cambarus obscurus. 



Cambarus obscurus, Hagen, op. cit., p. 69, PL I. figs. 72-75, 

 PL III. fig. 154. 1870. 



Hab. Genesee River, Rochester, New York. 



53. Cambarus forceps. 



Cambarus forceps , Faxon, supra, p. 133. 



Hab. Lauderdale Co., Alabama; Knoxville, Tennessee? 



