hetween lepidopterous larve and their surroundings. 355 
rather darker. These 2 larvae were upon the whole 
somewhat lighter than those in F and H. 
H. The larve with bluish-white spots exposed to lichen- 
covered sticks throwghout.—This larva was dying. It was 
now lighter than the larva in F, but this difference was 
entirely due to changes in the latter. 
III. THE QUERCIFOLIA LARVA WITH BROWN BRAMBLE- 
STEMS BEFORE HYBERNATION. 
I. The 4 uniform larve with lichen-covered sticks during 
and since hybernation.—Three larvee were in the last stage, 
2 of them brownish with small white spots like those in K, 
but with the ground-colour darker. The 8rd was con- 
siderably darker. The 4th larva was changing its skin. 
It possessed a deep brownish-black ground-colour, which 
appeared to be overspread with grey. 
J. The uniform larva with black twigs during and since 
hybernation.—The larva was very large in the last stage, 
and very uniformly dark and unspotted, although rather 
less black than those which had been exposed to black twigs 
before hybernation (1). 
K. The 3 spotted or lighter larve upon brown stems 
throughout.-—Two larve in the last stage were dark 
brownish with small light patches. The third, in the last 
stage but one, was more black-and-white, resembling the 
larvee which had been exposed to black twigs before 
hybernation (1). 
Compared as a whole the larvee of I were blacker than 
III, although these were very dark. The latter were 
distinguished by greyish-brown shades absent from the 
ground-colour of I. The light patches, when present, 
were distinguished in III by a brownish tinge, and were 
more clouded and less distinct than in I. 
Comparing carefully the darkest larva of II (viz. the 
4 darkest in D) with those of I, it was seen that the pale 
patches were of the same size as those of the larvee in which 
they were most developed of all exposed to black twigs 
(viz. the lightest larvee in A). But although the patches 
were of the same size, those of the former were yellowish- 
brown and clouded, and those of the latter white. The 
ground-colour of the larva in II was, however, much lighter, 
being a brownish-black, than that of the lightest larva in 
I. Hence the darkest larva in II was distinctly darker 
