1838. HOUSE—No. 72. 97 
second brood, which appears towards the end of summer, remain 
without change, till the ensuing spring, and then become perfect in- 
sects. ‘Thus, in every year, there are two broods, the larve from 
which, when numerous, often do considerable injury to vegetation. 
Crioceris trilineata is found on the leaves of the potato-vine. 
The parent insects, which have survived the winter in the pupa 
state, make their appearance early in June. The eggs are oblong 
oval, and of a yellow color, and are fixed on the leaves by a glutin- 
ous substance, which cements them securely in packets of six or 
eight in number. The larve soon appear, and begin their depreda- 
tions. Their numbers are sometimes immense, and the leaves are 
then covered and nearly consumed by these filthy grubs. After 
they have passed through their metamorphoses, which are such as 
were stated in the account of the genus, the perfect insects again ap- 
pear. ‘This occurs during the month of July, and the eggs for the 
second brood are then deposited, from which a continuation of the 
species in the following year, is secured, the larve entering the earth 
before antumn, and the pupe remaining quiescent till spring. 
The insects belonging to the family of Cassidade have the feet 
spongy beneath as in the three preceding families ; but the eyes are 
oval ; the antenne are short, and situated near each other at a dis- 
tance from the mouth, or between the eyes ; the nails are simple at 
the points, and not much curved. 
Inthe genus Hispa, the antenne are very short, and are thickened 
towards the ends ; the thorax is trapezoidal, its anterior edge being 
the shortest ; and the body is rough or spinous. The habits of this 
genus are very peculiar, and no account has as yet been given of them 
by any European naturalist. The perfect insect is found in the spring 
on the leaves of trees. It deposits from one to four or five eggs 
on the upper surface of the leaf. The larva, when hatched, pene- 
trates under the cuticle and devours the parenchyma or pulpy part 
of the leaf, so that the cuticle over its retreat turns brown and dies. 
The larve of those species which are known to me are about one- 
fifth of an inch in length, when fully grown. The body is oblong, 
flattened very much, rather broader before than behind, of a whitish 
color, except the head and first segment, which are of a darker color 
and horny consistence. It has three pairs of feet, and the segments 
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