BUTTERFLIES OF MAINE. 81 
as long as wide. This species averages smaller than arsace. 
This is a common species in Maine and is on the wing 
during the middle of May. 
According to Mr. Edwards, the larva feeds on wild plum, 
resting on the side and eating into the fruit. The eggs are 
whitish green, rounded and flattened, with a reticulated sur- 
face. They are laid on the flower stem and hatch in five or 
six days, just at the right time for the young eaterpillars to 
take the newly-formed plums. 
When first hatched they are .04 of an inch long, brownish 
yellow, of an oval form, flattened on the base, the back high 
and sloping towards the hinder part, and on each side there 
is arow of long, re-curved, white hairs, with a similar one 
along the edge of the base. In five days they molt their 
skins, when they are .08 of an inch long, of the same shape 
as before. There is a reddish brown stripe along the middle 
of the back, on each side of this, dull yellowish green with a 
macular brown line next the outer edge and limiting the 
dorsal area. Sides sloping, with a broken yellowish line; a 
similar but continuous line along the basal ridge. Whole 
under side, yellowish green. Body much covered on the 
upper side with short, stiff hairs. Head, heart-shaped, 
smooth, yellowish green. 
In three or four days they molt a second time, when they 
are .12 of an inch long and of the same shape as before. 
The back is considerably elevated and a tuberculous ridge 
crosses each segment from the fourth to the eleventh. Color, 
reddish brown and dull yellowish green. A red band runs 
along the back tapering to a point behind. A green line 
runs through the middle of the band. Outside of this band 
there is a green line containing a little reddish brown space 
on each segment. The sides are reddish brown with a green 
longitudinal line in the middle and the basal ridge is green. 
In five days more they molt a third time when they are .3 
of an inch long. The back from the fourth to the eleventh 
segments presents a series of elevated ridges, one to each 
6 
