1G6 A REVISION OF THE ASTACID^E. 



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

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



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

 River). 



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



dingii, Bartonii, Diogenes, Uhleri, and affinis within its limits. 



11. Maryland. — Five species: G. Blandingii, Bartonii (including var. robust a), Diogenes, 



Uhleri, and ajjinis. 



Through the investigations of Mr. P. 1!. 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 higher regions in the following counties : Harford, How- 

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



C. Bartonii, var. robust a, has been collected in Montgomery Co. 



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

 ( rarrett Counties. 



C. Uhleri has been found in Caroline, Dorchester, Talbot, St. Mary'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, and affinis. 



13. Virginia. — Seven species: C. Blandingii, Bartonii (including var. robusta), Diogenes, 



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

 Accomack Co. 



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



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

 are Clarke Co. ; Alexandria Co. ; tributaries of Rappahannock River, Staf- 

 ford Co.; tributaries of James River, Rockbridge Co.; Lunenburg; Frank- 

 lin, Southampton Co. ; Bath Co, ; Reed Creek, Wythe Co. ; and Holston River, 

 Smyth Co. 



C. Bartonii, var. robusta, in stony streams running into the Rappahannock and in 

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

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

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



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

 Petersburg, Diuwiddie Co. ; Alexandria Co. 



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

 of the State. 



C. affinis is found in the Potomac River, 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 0. dubius. The former is found 



in affluents of the Potomac, Granl Co. ; Petroleum, Ritchie Co.: White Sulphur 

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

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

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



