BUTTERFLIES OF THE VICINITY OF NEW YORK CITY 
31. Gray Comma Butterfly (Polygonia progne). 
The upper side of the wings is similar to that of P. comma, but the 
under side is very different; these are gray-brown, closely streaked 
with fine, short lines. It is less common than P. comma, but its 
habits are much the same. It is double-brooded, the first brood 
appearing in early summer and the second in August and September. 
The second brood hibernates. The caterpillar feeds on wild and 
cultivated currant and gooseberry. The figure shows the under side. 
32. White J Butterfly (Polygonta j-album). 
This species is somewhat rare in the vicinity of New York. In 
the Northern States the butterfly is abundant. It is yellowish, 
washed with rusty brown; basal half ferruginous, beyond which are 
large black spots on the fore wings and a white spot near the tip of 
each wing. 
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