1G6 A KEVISION OF THE ASTACID.E. 



C. affinis, at Bristol, Philadelphia, Brandywiiie Creek, Reading, Schuylkill, Bain- 

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



C. rusticus 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, Sartonii, Diogenes, Uhleri, and affinis within its limits. 



11. MARYLAND. Five species: C. Blandingii, Sartonii (including var. robusta), Diogmes, 



Uhleri, and affinis. 



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

 Cambari in Maryland is well ascertained. 



C. Blanninf/ii is found in the counties on Chesapeake Bay arid to the eastward, 

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

 cester. 



C. Sartonii inhabits the higher regions in the following counties : Harford, How- 

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



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



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

 Garrett Counties. 



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

 Wicomico, and Worcester Counties. 



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

 ington, and Alleghauy Counties. 



12. DISTRICT OF COLUMBIA. Three species : C. Sartonii, Diogenes, aud affinis. 



13. VIRGINIA. Seven species: C. Blandingii, Bar tonii (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 Eiver and at Lunenburg. 



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

 are Clarke Co. ; Alexandria Co. ; tributaries of Eappahannock 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. Sartonii, var. robusta, in stony streams running into the Rappahannock and in 

 springs at Fredericksburg, Spottsylvauia Co. According to Mr. Uhler, C. Sar- 

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

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



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

 Petersburg, Dinwiddie 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 Eiver, 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. Sartonii and C. dubius. The former is found 



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

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

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

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



