GEOGRAPHICAL DISTRIBUTION. 165 



Table showing our present Knowledge of the Distribution of the North 

 American Species of Cambarus and Astacus, arranged according to 

 States and Territories. 



1. Maine. — One species: 0. Bartonii, in the St. John, Penobscot, and Kennebec River 



systems. For detailed localities, see p. 62. 



2. New Hampshire. — None. 



3. Vermont. — One species: C. Bartonii, in affluents of Lake Clianiplain, at Burlington, 



Colchester, and Shelburne, Chittenden Co. 



4. Massachusetts. — One species: C. Bartonii, at Williamstown, Berkshire Co., and 



Grafton, Worcester Co. 



5. Rhode Island. — None. According to Prof. E. P. Larkin, Camhari {C. Bartonii T) 



were common forty years ago at Westerly, in the southwestern part of the 

 State, near the Connecticut line. 



6. Connecticut. — None. Prof. S. I. Smith tells me that thirty or forty specimens of 



C. Bartonii were introduced into a brook in New Haven in 1880, but none 

 have been seen there since. 



7. New York. — Five species: C. Blandingii, Bartonii (including var. robusta ,immunis, 



affinis, ami propinquus (including var. obscure). Perhaps also C. virilis. 

 C. Blandingii probably comes from the southeastern part of the State. 

 C. BartonM is distributed over the whole of the State. 

 C. Bartonii, var. robusta, is found in the St. Lawrence River basin in Chautauqua, 



Monroe, Wayne, St. Lawrence, Hamilton, Herkimer, and Jefferson Counties. 

 The particular locality for G. immunis is unknown. 

 C. affinis comes from Niagara, in the western part of the State, and probably lives 



also in the southeastern part. 

 C. prop in i i im s lives in the waters of the St. Lawrence basin, specimens haviug 



been received from Grass River, Black Lake, and Canton, in St. Lawrence 



Co. ; Lake Ontario ; Garrison Creek, Sackett's Harbor ; Oswego ; Oneida Lake ; 



Cayuga Lake, Rochester; Niagara; and Forestville, Chautauqua Co. 

 C. propinquus, var. obscura, is found in Genesee River, at Rochester. 

 C. virilis, Lake George ? (See page 98.) 



8. NEW .1 ERSEY. — Four species : C. Blandingii, Bartonii, Diogenes, and affinis. 



C. Blandingii is recorded from Essex Co. and from the Delaware River and tribu- 

 taries in Mercer Co. 

 C. Bartonii, from Essex, Morris, and Mercer Counti 

 C. Diogenes, from the Delaware meadows near Trenton, Mercer Co. 

 C. affinis, from Morris, Monmouth, Mercer, and Camden Counties. 



9. Pennsylvania. — Four species: C. Bartonii. Diogenes, affinis, and rusticus, C. Blan- 



dingii, found on the New Jersey side of the Delaware River, doubtless inhabits 

 the eastern part of the State. 



C. Bartonii is round in Bedford, Bradford, Dauphin, Cumberland, Columbia, Lan- 

 caster, Philadelphia, Chester, McKean, and Clarion Counties (Delaware, Sus- 

 quehanna, and i)hio River systems). 



C. Diogenes, at Derry Station, Westmoreland Co. (Ohio River system). 



