STATE AGRICULTURAL SOCIETY. 
799 
POTATO-BEETLE. TUB BEETLE DESCRIBED. 
Bide its outline is nearly the form of a crescent. The head is small and 
much narrower than the fore part of the body, of a flattened spherical 
form. Its mouth is furnished with short, conical, jointed feelers and 
large jaws which are blunt at their ends, with little sharp teeth like those 
of a saw. Immediately above the mouth on each Side of the head is a 
small conical and jointed projection, which is the antenna. The thorax 
has a large transverse space on the top of its first ring, of a firmer and 
somewhat coriaceous texture and broadly margined with black on its hind 
side and with dusky at each end. The abdomen is the thickest part of the 
body and is distinctly divided into nine segments. It is very plump and 
rounded, but flattened on its underside. It gradually tapers posteriorly 
into a conical point the apex of which is blunt and serves as a pro-leg, 
two small vesicular processes on its lower side at the end serving as feet. 
There are six legs, placed anteriorly, upon the breast, each leg being com¬ 
posed of three joints and ending in a small claw. The larva is of a pale 
yellow color, often slightly dusky or freckled on the back with minute 
blackish dots, and along each side are two rows of large black dots, those 
of the upper row larger, seven in number, not being continued upon the 
thoracic or the last abdominal rings, each dot having a small breathing 
pore in its centre. The head is black and shining, and more or less mottled 
on the face with dull yellowish. The neck or first ring has a black band 
near its hind edge; the second ring has also either a short black band or 
two black dots, whilst the third ring usually shows two small black dots 
on its back. On the narrow tip of the body are two black bands, the 
anterior one having at its end on each side a small black dot, and beyond 
this a large black dot which is the last one of the lower row of dots along 
the sides. On the next ring forward is a transverse row of six small 
equidistant black dots, in addition to the two large dots on each side, 
whereof the upper one is the last of the upper lateral row and the lower 
the penultimate one of the lower row. The legs are black; and often along 
the middle of the body, on the underside, is a row of transverse black 
spots or clouds, and also a row of small black dots upon each side. 
The Beetle or mature insect is 0.40 long and 0.25 thick, the female being 
slightly larger. It is of a regular oval form, very convex above and flat 
beneath, of a hard crustaceous texture, smooth and shining, of a bright 
straw color, the head and thorax being sometimes tawny yellow, which is 
the color of the underside; and it is dotted and marked with black. After 
death its colors often fade, becoming more dull and dark. The head is near¬ 
ly spherical and little more than half the width of the thorax, into which 
it is sunk nearly or quite to the eyes. It is sprinkled over with fine 
punctures and shows on the front an impressed medial line, and on each 
side of this a wider shallow indentation. On the crown is a triangular 
black spot. The nose piece or clypeus, occupying the space between the 
antennae, is nearly semicircular and placed transversely, and is coarsely 
and closely punctured. The jaws are coarsely punctured, black at their 
tips, and have a slender black line along their outer edge. The tips of 
the palpi or feelers are dark brown. The antennas reach nearly to the base 
