LYMN.EID.E OF NORTH AMERICA. 



269 



RADULA: Formula: ^+^1+1+1+!+^ 4+* 1 - 2 * (20-1-20) ; the 

 teeth are similar in all respects to those of modicella. 



GENITALIA: Not differing from those of modicella. 



RANGE (Figure 27) : New York west to Utah, Nebraska south 

 to New Mexico. 



The scattering records of rustica indicate that it is an inhabitant 

 of the Boreal, Transition and Austral life zones. The larger part of 

 the records are confined to the humid divisions of the Transition and 

 Upper Austral life zones. Future records will doubtless extend the 

 range of this race, which is now known from the Canadian, Upper 

 Mississippian and Rio Grandian regions. Its range is probably co- 

 extensive with that of Galba humilis modicella. 



Distribution of 



RUSTICA. 

 FERRUGINEA 



FIG. 27. 



RECORDS. 



UNITED STATES. 



ILLINOIS: Joliet, Will Co. (Ferriss). 



INDIANA: Lake James, Steuben Co. (Daniels). 



KANSAS: Lawrence, Douglass Co. (Hanna). 



MICHIGAN: Whitefish Point, Alpena, Al-pena Co. (Nason) ; Cedar Lake, 

 Montcalm Co.; Benzie, Chippewa, Eaton, Emmet, Grand Traverse, Gratiot, 

 Ing-ham, Isabella, Kent, Marquette, Menominee, Monroe, Montcalm, Muskegon, 

 Ontonagon, Tuscola and Washtenaw Counties (Walker). 



NEBRASKA: Squaw Canyon, Sioux Co. (O. A. Peterson; Ortmann). 



NEW MEXICO: Albuquerque, Bernalillo Co. (Ashmun). 



NEW YORK: Irondequoit Bay; Wide Waters, Erie Canal, Rochester, Mon- 

 roe Co. (Baker); Mohawk, Herkimer Co. (Nason). 



OHIO: Poland, Mahoning Co. (Lea). 



