1G6 A KEVISION OF THE ASTACID^. 



C. affinis, at Bristol, Philadelphia, Brandywine Creek, Eeading, Schuylkill, Bain- 

 bridge, and Carlisle (Delaware and Susquehanna Eiver systems). 



C. rustims has been found at Pittsburg, in the western part of the State (Ohio 

 Eiver). 



10. Delaware. — None. An exploration of this State will probably discover C. Blan- 



dingii, Bartoiiii, Diogenes, Uhlcri, and affinis within its limits. 



11. M.VRYLAND. — Five species: C. Blandimjii, Bartonii (including var. rohusta), Diogenes, 



Uhleri, and affinis. 



Through the investigations of Mr. P. E. Uhler, of Baltimore, the distribution of 

 Cambari in Maryland is well ascertained. 



C. Blandingii is found in the counties on Chesapeake Bay and to the eastward, 

 viz. Baltimore, Caroline, Dorchester, St. Mary's, Somerset, Wicomico, and "Wor- 

 cester. 



C. Bartonii inhabits the liigher regions in the following counties : Harford, How- 

 ard, Montgomery, Frederick, Washington, Garrett, and Alleghany. 



C. Bartonii, var. robusta, has been collected in Montgomery Co. 



C. Diogenes inhabits Baltimore, St. Mary's, Caroline, Dorchester, Worcester, and 

 USrarrreW Counties. 



C. Uhleri has been found in Caroline, Dorchester, Talbot, St. IMary's, Somerset, 

 Wicomico, and Worcester Counties. 



C. affinis, Cecil, Harford, Baltimore, Anne Arundel, Montgomery, Charles, Wash- 

 ington, and Alleghany Counties. 



12. District of Columbia. — Three species: C. Bartonii, Diogenes, &\i(iL. affinis. 



13. Virginia. — Seven species: C. Blandingii, Bartonii {\nc\\x([mg wax. rohusta), Diogenes, 



duhius, affinis, rusticus, and Putnami. C. Uhleri will probably be found in 

 Accomack Co. 



C. Blandingii has been collected in James Eiver and at Lunenburg. 



C. Bartonii appears to be widely distributed in Virginia ; the known localities 

 are Clarke Co. ; Alexandria Co. ; tributaries of Eappahaunock Eiver, Staf- 

 ford Co. ; tributaries of James Eiver, Eockbridge Co. ; Lunenburg ; Frank- 

 lin, Southampton Co. ; Bath Co. ; Eeed Creek, Wythe Co. ; and Holston Eiver, 

 Smyth Co. 



C. Bartonii, var. robusta, in stony streams nxnning into the Eappahannock and in 

 springs at Fredericksburg, Spottsylvania Co. According to Mr. Uhler, C. Bar- 

 tonii, var. robusta, is not found in the tributaries of the Eappahannock in Staf- 

 ford Co., whence comes the typical C. Bartonii. 



C. Diogenes, Accomack Co. ; Northampton Co. ; Fredericksburg, Spottsylvania Co. ; 

 Petersburg, Dinwiddle Co. ; Alexandria Co. 



C. duhius, at one locality, Pennington's Gap, Lee Co., in the southwestern corner 

 of the State. 



C. affinis is found in the Potomac Elver, Fairfax Co. 



C. rusticus and C Putnami are found at Cumberland Gap, at the southwestern 

 extremity of the State. 



14. West Virginia. — Two species : C. Bartonii and C. duhius. The former is found 



in affluents of the Potomac, Grant Co. ; Petroleum, Eitchle Co. ; White Sulphur 

 Springs, Greenbrier Co. ; and in branch of Clinch Eiver, in the southwestern 

 part of the State. The latter (C. duhius) comes from Cranberry Summit, Pres- 

 ton Co., in the northern part of the State. 



