BUTTERFLIES OF MAINE. 49 
two weeks, the butterfly emerges. This is the form marcia ; 
while those arising from the first brood mentioned above, are 
the form morpheus. 
- 20. GRapTa INTERROGATIONIS,. F. 
Grap -ta in-ter-ro-ga-ti-o'-nis. 
Expanse of wings, two and three-fourths inches. 
Upper side of the wings, tawny orange, with brown spots 
running together on the outer part, and with an oblique black 
spot extending from the middle of the costa across the end 
of the cell. Two more small ones in the cell, and three or 
four somewhat larger, resting on the interspaces below. 
Hind wings, above, of the same color as the fore wings, with 
two small black spots near the middle, and one on the costa, 
which is double in the female. The outer borders of all the 
wings, including the angles and tails, are lilac. Under side 
of the wings, pale brown, more or less clouded with darker 
brown, with an irregular, sharply angulated band across the 
middle of both wings; the surface more or less washed with 
lilac. At the end of the cell, near the middle of the under 
side of the hind wings, is an interrupted C, usually silvery, 
but sometimes golden-colored. 
There are two forms of this insect; the one described 
above is known as the form /fabricti; and the other, which 
is known as the form umbrosa, differs from the above in having 
the outer half of the hind wings quite black, and the under 
side of the fore wings of the males, lighter, and coarsely 
marbled. 
The larve of this species live on the leaves of the hop, 
elm, nettle, false nettle and basswood. The eggs are pale 
green, conoidal in form, with the base flattened; the sides 
are rounded, and marked by eight or nine vertical ribs, which 
are low near the base, but higher above, and terminate 
abruptly around a small, flat space at the top. Duration of 
this staye, from three to ten days. The caterpillars pass four 
4 
