THE GRIZZLED SKIPPER 
355 
on the wing in May and June. In early seasons it appears 
during the latter part of April, while in unusually fine, warm 
and early springs it has been met with early in April, such 
as in 1893, when it appeared on April 7th. In such excep¬ 
tional seasons a partial second brood occasionally occurs in 
August. 
Hibernation. This species hibernates as a pupa from about 
the middle of August until the emer¬ 
gence of the imago in the following ^ 
May. 
Egg and Egg Laying. The food 
plants of this butterfly consist chiefly 
of the Wild Strawberry, the Bramble 
and the Raspberry. The eggs are 
laid singly and usually on the upper 
surface of the leaves. 
The egg is dome-shaped, 0*60 mm. 
wide and 0*50 mm. high. From 
eighteen to twenty very fine, irreg¬ 
ular, glassy white keels run from the 
crown to the base ; the surface be¬ 
tween the keels is very finely ribbed 
transversely, and the entire surface 
is extremely finely granulated. The 
colour is a clear, light green. The 
egg state lasts from eight to ten days, 
according to the temperature. 
Larva. Soon after emerging from 
the egg, the little larva spins a silk 
covering over itself, and under this 
it lives, usually selecting for its abode 
the mid-rib on the upper surface of the leaf. It generally 
crawls to about its own length from its tent to feed on the cuticle 
of the leaf, and after a short meal it returns to its retreat. 
After about twenty days, i.e. after its second moult, it draws 
the edges of the leaves together and lives in the folds. 
When fully grown, after the fourth moult, it is 16 mm. 
long while resting and 19 mm. when crawling. The head is 
black and roughly reticulated and clothed with hairs. The 
first segment is very small; the body tapers at each end, 
The Grizzled Skipper at rest. 
Sketched from life. 
