BUTTERFLIES OF THE VICINITY OF NEW YORK CITY 
41. Blue-Eyed Grayling (Satyrus alope). 
Found plentifully throughout July and August in grassy fields 
and open woods, especially along the borders of woods where the 
large trees have been felled and a young growth is appearing. It 
flies low, and for but a short distance, and rests upon the leaves of 
bushes or trunks and twigs of dead trees. In the North a form occurs 
which lacks the yellow marks-on the fore wings (var. nephele). The 
caterpillar feeds on grasses. 
42. Pearly-Eyed Grayling (Debis portlandia). 
Generally distributed in this vicinity, but it is local. The flight is 
somewhat like that of Neonympha canthus. It often rests on the 
trunks of trees, sallies forth at any passing butterfly and retires again 
to its chosen post of observation. It also flies near the ground, along 
the edges of woods or in the forests among bushes and trees. Found 
from the latter part of June to about the first of August, and it is 
single-brooded. The caterpillar feeds on grasses. 
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