STATES OF INSECTS. (Larva.) 181 
longs, the larva is adorned with two on the back of the 
first segment twice as long as the rest, and resembling 
at first sight two antennee. 
The spines, as well as the hairs of the new skin, are 
concealed under the old one, and not incased in its spines ; 
but Bonnet ascertained, that if cut off very closely, the 
larva sometimes died in consequence, whilst no such re- 
sult followed a similar operation on hairy larve. We 
learn from Reaumur*, that some spinous larvee of saw- 
flies (Serr7fera) lose their spines at the last change of 
their skin; and from Madame Merian, that that of Atta- 
cus Lrythrine before mentioned loses also at the same 
period the six tremendous black spikes that arm its black 
and yellow larvee. The grubs of ants that are destined 
to pass the winter in the larva state are hairy, but are not 
so in summer’. ‘The spines found in the grubs of some 
gad-flies (Gstrus L.) are of a different kind from those 
above described, being very minute triangular flat plates, 
arranged in different and contrary directions °, and serv- 
ing the insect merely to change its place and fix itself‘. 
Two other kinds of clothing, if so they may be called, 
neither coming under the description of hairs nor spines, 
are found in some other larvee, not only amongst the Le- 
pidoptera, but also in some of the other orders. Lime- 
nitis Populi and others of the same family have larvze 
furnished on the back of each segment with cylindrico- 
conical processes of a fleshy substance, obtuse at the apex 
and surrounded with capitate hairs. In that of L. Sy- 
billa, which has on each segment two fleshy protube- 
rances, they are bifurcate or trifurcate, and also encir- 
* Reaum. v. 95. > Huber Meurs des Fourmis, 79. 
* See above, Vou. II. p.273—. *¢ Reaum. v. 72. t.ix. f. 2—4. 
