206 STATES OF INSECTS. (Larva.) 
1 
or twigs under which they propose to conceal themselves 
during their existence in that state. Others previously 
suspend themselves by a silken thread fixed to the tail, 
or passing round the body; by which also, when become 
pupze, they are afterwards pendent in a similar position ; 
and lastly, a very great number of larva wholly inclose 
themselves in cases or cocoons, composed of silk and va- 
rious other materials, by which during their state of re- 
pose they are protected both from their enemies and the 
action of the atmosphere. As these two last-mentioned 
processes are extremely curious and interesting, I shall 
not fear tiring you by entering into some further detail 
respecting them: explaining first the mode by which lar- 
ve suspend themselves, both before and after they are 
become pups, by silken threads; and nezt, the various 
cases ot cocoons in which others inclose themselves, and 
their manner of operating in the formation of them. 
1, The larve which suspend themselves and their pu- 
px, with the exception of the tribe of Aluczte, and some 
Geometers of the family of Cyclophora pendularia, punc- 
taria, &e. are almost all dbutterflies?. No others follow 
this mode. They may be divided into two great classes 
—those which suspend themselves perpendicularly by 
the ¢az/, and those which suspend themselves horizontally 
by means of a thread girthed round their middle. In 
@ Except the species of Polyommatus, P. Argiolus, Corydon, &c. 
and Thecla Rubi, Betule, &c. Some of the larve of the former 
become pup within the stalk of some plant, or partly under the 
earth: those of the latter usually in a leaf te which the abdomen is 
fastened by various threads. These last are the rowleuses of the but- 
terfly-tribe, living, like some moths, in leaves that they have rolled 
up. N. Dict. d’ Hist. Nat. xxiv. 499. 
