OF NORTH AMERICA. 



413 



mighelsi, angulata, and the other races of this species. It should be 

 found abundantly in the waters of northern Michigan, northern Maine 

 and southeastern British America. 



RECORDS. 

 UNITED STATES. 



MAINE: Mud Lake (second Eagle Lake) on Fish River; Aroostook River; 

 thoroughfare between Portage and Eagle lakes ; Square Lake Inlet ; Fish River, 

 Fort Kent; Aroostook Co. (Nylander) ; Aroostook Co. (Nylander); Lakes of 

 Maine (Say). 



Distribution of 

 EMARGINATA 



WISCONSINENSIS 



FIG. 46. 



MICHIGAN: Lake shore, Mackinac Island, Mackinac Co.; Sault St. Marie, 

 Chippewa Co.; Tonkin, Conglomerate and Siskowit bays, Isle Royale (Walker). 



NEW YORK: North end Seneca Lake, Ontario Co. (Baker) ; Saratoga Lake, 

 Saratoga Co. (Say). 



BRITISH AMERICA. 



ONTARIO: Lake Superior (Ferriss; Newberry) ; Kettle Falls, Rainy Lake, 

 Rainy River District ; Nepigon River, Thunder Bay District ; Rideau River, Otta- 

 wa Dist. (Latchford) ; Lake Namakin, Thunder Bay Dist. (Say) ; Lake of the 

 Woods, Rainy River Dist. (Whiteaves). 



GEOLOGICAL DISTRIBUTION: Unknown. 



