between lepidopterows larve and their swrrowndings. 353 
colour. The two others were not so dark and bore brown 
points and patches, which tended to fuse at their edges 
with the dark greyish ground-colour. 
J. The three similar larve with black twigs.—Only one 
larva was alive, and this was rather darker than the darkest 
of the set just deseribed (I), having a dull blackish ground- 
colour. One dead larva had a very black ground-colour 
with brown dorsal points and distinct although small white 
patches. It is probable that some slight effect was 
produced by the black twigs just before hybernation 
began. 
K. The four lightest and most distinctly spotted larve, 
with brown twigs—Three larvee were alive. The smallest 
one possessed the blackest ground-colour and the whitest 
patches of any in the whole series (III). The other two 
closely resembled the two lighter larvee in I. 
IV. THE QUERCIFOLIA LARV UPON GREEN LEAVES AND 
SHOOTS OF THE HAWTHORN. 
L, M. There was no distinction between the two lots. 
The larvee, as before hybernation, presented a great range 
of variation, but the ground-colour was upon the whole 
greyish. The lightest individual was rather lighter than 
the darkest of those upon lichen before hybernation (I1), 
while the next in order was about the same as the darkest 
of Il. Four others were rather less ight, while a fifth was 
a distinctly dark form. Hence the set was upon the 
whole intermediate between I and II and distinctly 
lighter than III. 
April 28th. The length of all those larvee which had 
ceased to feed preparatory to a change of skin was about 
56°0 mm. <A few days later the cast skins were examined, 
and were seen to possess the white markings as well as the 
dark ground-colour. Hence these characters are in part, 
if not entirely, cuticular in position. 
THIRD GENERAL COMPARISON OF THE LARVA MADE 
AFTER HYBERNATION, May 7TH. 
I. THE QUERCIFOLIA LARVA WITH BLACK TWIGS BEFORE 
HYBERNATION. 
A. The 3 chequered larve with black twigs—Two larvee 
were dark, and 1 black chequered with white markings, 
which were larger than those of any other larvee in J, but 
