HOW TO KNOW THE BUTTERFLIES 



GEOGRAPHICAL DISTRIBUTION IN THE EAST OF 

 THE FORMS OF THE SPRING AZURE 



Boreal America (Labrador to Alaska). 

 Only one brood, dimorphic. 

 C. ladon lucia. 

 C. ladon violacea. 

 Lat. 45°-4i° N. (Montreal to Long Island). 

 Two broods. 



I. Winter Forms or first generation. 



C. ladon lucia. 



C. ladon marginata. 



C. ladon violacea. 



II. Summer Form or second generation. 



C. ladon ncglecta. 

 Lat. 4i°-3S° or 39 N. (Long Island to West Virginia). 



I. Winter Forms or first generation. 



C. ladon violacea. 

 C. ladon ladon. 



II. Summer Form or second generation. 



C. ladon ncglecta. 

 South of 38 or 39 N. (West Virginia to Gulf of Mexico). 



I. Winter Forms or first generation. 



C. ladon violacea (male and female). 

 C. ladon violacea-jiigra (male). 

 C. ladon ladon. 



II. Summer Form or second generation. 



C. ladon ncglecta. 



Remarkable organs exist in the seventh and eighth ab- 

 dominal segments of the larva; of certain Lycsenids. These 



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