BUTTERFLIES OF THE VICINITY OF NEW YORK CITY 
18. Regal Fritillary (Argynnis idalia). 
Found during July and August in swampy meadows or adjacent 
fields, and it is sometimes common locally. When feeding, the butter- 
fly nervously flutters its wings and darts off at the least disturbance. 
It is single-brooded, and hibernates as a caterpillar. The caterpillar 
feeds on violets. 
19. Great Spangled Fritillary (Argynnis cybele). 
Rather common in swampy places. Makes its appearance in 
the latter part of June, and is found throughout July and the early 
part of August. The caterpillar lives on violets and hibernates. 
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