98 



ASTACID^. 



V C. propinquUS — Continued. 



New York : Lake Oneida, Rochester, Ni- 

 agara, Grass River, Lake Ontario, Four- 

 Mile Creek, Oswego, Garrison Creek, 

 Sackett's Harbor. 



Illinois : Ogle County. 



Indiana: Delphi. - 



•^ 20. C. obseurus. 



New York : Genessee River, Rochester. 



? Virginia : (A. fossor Raf.) 



? Pennsylvania : {A. fossor Raf.) 



4 21. C. rusticus. 



Ohio : Cincinnati. 

 Canada: Lake Superior. 



22. C. immunis. 



Illinois : Belleville, Lawn Ridge. 

 Alabama : Huntsville. 

 North Carolina: Beaufort. 



23. C. extraneus. 



Georgia : Tennessee River. 



C. Bartonii — Continued. 

 Missouri : Osage River. 

 Virginia : Greenbrier River. 



'25. C. robustus. 



Canada : Toronto, Humber River. 



New York: Genessee River, Rochester, 



Lake- Regis, Adirondack Region. 

 Virginia : Fredericksburg. 



26. C. obesus. 



Illinois : Prairie near Chicago, Evanston, 



Lawn Ridge. 

 Missouri: Belleville. 

 Ohio : Kelley Island, Lake Erie. 

 New York : Garrison Creek, Sackett's 



Harbor, Lake Ontario. 

 Arkansas. 



Virginia : Petersburg. 

 Mississippi : Monticello. 

 Louisiana: New Orleans. 



27. C. Nebrascensis. 



Nebraska. 



Y-24. 



GROUP III. 



C. Bartonii. 



Canada : Lake Superior. 



Vermont : in most of the small streams in 

 the western part of the State. 



New York : Lake Champlain, Elizabeth- 

 town, Berkshire, Fishkill, Newburg, 

 Western New York. 



New Jersey : Schooley's Mountain. 



Pennsylvania : Philadelphia, Schuylkill 

 River, Berwick, Hammetstown. 



Ohio : Cincinnati, Sciota River, Columbia. 



Kentucky : Hickmann's Landing, Ken- 

 tucky River, Mammoth Cave. 



District of Columbia : Georgetown. 



28. C. latimanus. 



Georgia : Athens. 

 South Carolina. 



29. C. Mexicanus. 



Mexico. 



30. C. Cubensis. 



Cuba. 



31. C. advena. 



Georgia. 



South Carolina : Charleston. 



Alabama: Mobile, 



32. C. Carolinus. 



Georgia. 



Carolina (or South Carolina?). 



Genus ASTACUS. 



33 (1). A. Gambelii. 



California. 



34 (2). A. nigreseens. 



California : San Francisco. 



35 (3). A. Trowbridgii. 



Oregon : Astoria. 



A. KlamathensiS — Continued. 



British Columbia : all streams east of the 

 Cascades. 



37 (5). A. leniusculus. 



Oregon : Columbia River. 

 Washington Territory : Puget Sound. 



38 (4). A. KlamathensiS. 



Oregon : Lake Klameth, Cascades. 



38 (6). A. Oreganus. 



Oregon : Columbia River. 



