lymn/eim: 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. 



w $ 



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w 



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\ Distribution of 

 \^ EXIGUA \ 



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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). 



