436 HYBERNATION OF INSECTS. 
tually provided against. The perfect insect is not re ady 
to break forth until the food of the young, which are to 
proceed from its eggs, Is sprung up. 
To the insects which hybernate in the /arva state, of 
course belong, in the first place, all those which exist un- 
der that form more than one year; as many Melolonthe, 
Elateres, Cerambyces, Buprestes, and several species of 
Libellula, Ephemera, &c. There are also many larvee 
which, though their term of life is not a year, being 
hatched from the egg in autumn, necessarily pass the 
winter in that state, as those of several Anobia and other 
wood-boring insects; of Tortriza Weeberana and others of 
the same family; of the second broods of several butter- 
flies, &c. Many of these residing in the ground or in 
the interior of trees need no other hybernacula than the 
holes which they constantly inhabit; some, as the aquatic 
larvee, merely hide themselves in the sides or muddy bot- 
tom of their native pools; while others seek for a retreat 
under moss, dead leaves, stones, and the bark of decay- 
ing trees. Most of these can boast of no better winter 
quarters than a simple unfurnished hole or cavity; but a 
few, more provident of comfort, prepare themselves an 
artificial habitation. With this view the larva of Bom- 
byx Cossus, L., as formerly observed in describing the 
habitations of insects*, forms a covering of pieces of 
wood lined with fine silk ; those of Bombyx Humuli, Nec- 
tua radicea, and some other moths, excavate under a stone 
a cavity exactly the size of their bodies, to which they 
give all round a coating of silk®; and the larve of Pa- 
ptlio Crategi inclose themselves in autumn in cases of 
@ Vor. 1. 4th Ed. 455. > Brahm, Jns. Kal. ii, 59, 118. 
