VIRGINIA: _Smythe_: USNM 101386, Holston River, Seven Mile Ford. WEST VIRGINIA: _McDowell_: USNM 33767, Dry Fork, Perryville (county questionable, perhaps Randolph County). WISCONSIN: _Chippewa_: CNHM 8223, Lake Wissota, mouth of Yellow River, Anson Twp. _Polk_: UMMZ 72511-12, St. Croix River "near" Never's Dam. _County unknown_: CNHM 15971, Eau Claire River. _Records in the literature._--ONTARIO: _Carleton_: Ottawa (questionable record). _Essex_: Point Pelee. _Haldimand_: Dunville. _Kent_: Lake St. Clair. _Norfolk_: Long Point. _Oxford_: Beachville. _Wentworth_: Hamilton Bay (Logier and Toner, 1955:51). QUEBEC: _Iberville_: Richelieu River at Iberville (Logier and Toner, 1955:51). ALABAMA: _Lawrence_: Courtland (Stejneger, 1944:53). ILLINOIS: _Boone_: Belvidere. _Bureau_: Bureau. _Cass_: Chandlerville. _Clay_: Louisville (Cahn, 1937:189). _Cook_: Lake Michigan (Kennicott _in_ Stejneger, 1944:44); Evanston (Necker, 1939:10); Chicago (Schmidt and Necker, 1935:76). _Crawford_: Robinson. _Douglas_: northern part of county (P. W. Smith, 1947:39). _Fayette_: Vandalia. _Fulton_: Ellisville (Cahn, _loc. cit._). _Grundy_: Morris (Stille and Edgren, 1948:201). _Jackson_: Jacob (Cagle, 1942:158). _Jersey_: Grafton (Cahn, _loc. cit._). _Kane_: Batavia; Dundee Game Farm (Stille and Edgren, _loc. cit._). _Kankakee_: Kankakee River near Altort (Necker, _loc. cit._). _Lake_: Fox Lake. _LaSalle_: Streator (Cahn, _loc. cit._). _Lawrence_: (Hahn _in_ Stejneger, 1944:44). _Lee_: symbol on map (Cahn, _loc. cit._). _McHenry_: McHenry (Stille and Edgren, _loc. cit._). _Macon_: Decatur. _Macoupin_: Carlinville (Cahn, _loc. cit._). _Ogle_: Oregon (Garman _in_ Cahn, _loc. cit._). _Randolph_: Chester, Reily Lake. _Rock Island_: Barstow, Hillsdale, Rock Island (Cahn, _loc. cit._). _Saline_: Horseshoe Lake (Stein, 1954:312). _Stephenson_: Freeport (Cahn, _loc. cit._). _Union_: Bluff Lake (Garman _in_ Cahn, _loc. cit._). _Whiteside_: Sterling, symbol on map (Cahn, _loc. cit._). _Williamson_: Marion (Cagle, 1942:158). _Winnebago_: Rockton; symbol in western part of county (Cahn, _loc. cit._). _County unknown_: Fox River (Yarrow, 1882:29).