204. STATES OF INSECTS. (Larva.) 
stomach * ; their colours either change totally, or fade; 
and they make themselves ready for entering upon a 
new stage of their existence. Some merely rest in a 
state of inactivity in the midst of the substances in which 
they feed, as if conscious of their inability to select any 
safer abode. Of this description are most Coleopterous, 
Hymenopterous, and Dipterous larvae, that feed under 
ground, or in the interior of trees, fruits, and seeds. 
But a still larger tribe, those which feed on leaves, ani- 
mals, &c. act as if more sensible of the insecurity of this 
to them important epoch. They are about to exchange 
their state of vigour and activity for a long period of death- 
like sleep. The vigilant caution which was wont to guard 
them from the attack of their enemies will be hencefor- 
ward of no avail. Destitute of all the means of active 
defence, their only chance of safety during their often 
protracted night of torpor must arise from the privacy of 
their place of repose. About this, therefore, they exhibit 
the greatest anxiety. Many, after wandering about as if 
* A caterpillar nearly answering to the description of that of Lo- 
phopterix camelina, which I found upon the hazel, after a few days 
_ produced sixteen grubs ofsome Ichneumon. At first these grubs were 
green, but they became gradually paler ; and after a day or two be- 
came pup. But I mention this circumstance here for another rea- 
son : upon examining them after this last occurrence, I observed that 
they adhered to the lid of the box in which I kept the larva, arranged 
somewhat circularly; and at a little distance from the anus of each 
was a pea-green mass, consisting of about eight oval granules, which 
appeared like so many minute eggs. These were the excrement eva- 
cuated by each grub previously to its becoming a pupa. The appear- 
ance of this little group, with their verdant appendage, formed a cu- 
rious spectacle: when they emerged from the pupa, I found they 
belonged to Geoffroy’s genus Eulophus, but to an undescribed spe- 
cies to which I have given in the Linnean Transactions, (xiv. 112. 
Curtis Brit. Ent. t. 133.) the name of 2. damicornis, K, 
