OF NORTH AMERICA. 



287 



RANGE (Figure 30) : Maine west to Iowa and Minnesota, north- 

 ern Michigan south to Tennessee. 



Exigua has a wide range, embracing a larger part of the Alle- 

 ghanian and Carolinian divisions of the Transition and the Upper 

 Austral life zones. To the north and northeast (Michigan and Maine) 

 it penetrates the Boreal (Canadian) life zone. A characteristic race 

 of the Canadian, Upper Mississippian and Nova Scotian regions. 



Distribution of 

 EXIGUA 



FIG. 30. 

 RECORDS. 



UNITED STATES. 



ILLINOIS : In ditches, N. W. end Calumet Lake, Cook Co. (Baker) ; Drum- 

 mond, Will Co. (Ferriss) ; Stony Island, Cook Co. (Hood). 



INDIANA: Little Kankakee River, near La Porte, Indiana (Daniels). 



IOWA : Bayou below Valley Junction, Des Moines, Polk Co. ; pond No. 1 

 and pond No. 3 above dam, Des Moines; pond No. 3, old Zoo, Des Moines; 

 pond below Chesterfield, near Des Moines (Van Hyning) Elk Lake, Ruthven, 

 Palo Alto Co. (Walker). 



MAINE: Aroostook River, Caribou, Aroostook Co.; Caribou Stream, 

 Woodland, Aroostook Co. (Nylander). 



MICHIGAN : West Twin Lake, Charlevoix Co. ; Pere Marquette River, 

 Lake Co.; Carlton, Monroe Co.; Alger, Alpena, Charlevoix, Dickinson, Eaton, 

 Gratiot, Kent, Lake, Marquette, Monroe, Montcalm, Ottawa, Shiawassee and 

 Washtenaw Counties (Walker). 



