OF INSECTS. 
311 
number live exposed on the foliage of plants, but 
others take up their abode in the interior of slender 
shoots and feed upon the immature pith ; others 
lodge in the interior of fruits and cause them 
speedily to decay. 
The first insect selected as an example of the 
family of saw-flies, is named 
CIMBEX DECEM-MACULATA. 
Plate XXX. Fig. 2. 
Leach Zool. Mis. III. p. 106 — Curtis * Brit. Ent. I. PI. 41. 
The genus cimbex possesses six-jointed antennae, 
of which the second joint is much the longest, 
and the terminal one oblong and club-shaped. The 
two terminal joints of the maxillary palpi are small 
and ovate ; the labial palpi scarcely longer than the 
labium ; labrum small and oblong ; mandibles large 
and acute, the inner side irregularly toothed ; hinder 
thighs very thick in the males ; the tibies terminated 
by a pair of obtuse spurs, and the tarsal joints pro- 
duced into a spine beneath. 
The larvae of Cimbex have twenty- two feet; and 
some of them, when annoyed, are capable of squirt- 
ing a greenish liquid from two lateral apertures. 
When about to enter the pupa state, they form an 
oblong hard case, which is usually attached to the 
tree or shrub on which they fed. We have seven 
or eight British species, of which the above is one 
of the rarest. The body is black, the abdomen 
tinged with violet, the third and seventh segments 
