STATE AGRICULTURAL SOCIETY. 
699 
PINE. TRUNK. 
the others and rounded at its tip. Thus, including the head, 
these larvae are composed of fourteen segments, which is one 
more than is found in the larvae of any other insect of this order, 
except the long-horned beetles. 
The burrows which they excavate are also so peculiar that 
on raising the bark they are at once distinguished from those 
of the several other larvae which reside in the same situation. 
They are long, narrow and very shallow grooves in the surface 
of the wood, forming irregular wavy or serpentine tracks which 
gradually increase in width as the worm has increased in size, 
and are stuffed with its chips and castings firmly packed 
together. At the larger end of the burrow an oval hole is 
usually seen, running down into the wood, into which the larva 
has retired to repose during its pupa state. These burrows, 
however, as well as the larvae which excavate them, are subject 
to considerable variety in the different genera and species of 
these insects. Some of them mine their galleries in the interior 
ot the sap wood at the depth of a half inch or more bteneath its 
surface, and in a longitudinal direction, the larger end of the 
perforation turning outward to the bark to enable the insect to 
make its exit when it attains its perfect form. Ratzeberg thinks 
the larva; are two years in obtaining their growth, but Perris 
is confident they come to maturity in one year when no unfavor¬ 
able circumstances retard them. 
The pupae are very different from the larvae, and resemble 
the perfect insects in their form, but are soft and white, with 
their rudimentary legs and wing covers appearing upon their 
exterior surface, enclosed in sheaths like the hand in a glove, 
the same as in the pupae of most other insects. 
The perfect insects are often adorned with brilliant green, 
coppery, golden or other metallic colors, rendering them the 
most splendid subjects of the order to which they pertain. 
They are mostly about three times as long as wide, and of an 
elliptic form, more rounded in front and tapering behind, flat¬ 
tened and rather more convex beneath than above, their bodies 
covered with a very hard shell and quite compact, the head 
being sunk into the thorax to the eyes, and the thorax closely 
fitted to the base of the wing-covers. Their feet are five-jointed, 
their legs rather short, and their antennae small and thread-like 
