STATE AGRICULTURAL SOCIETY. 
411 
GRAPH. LEAVES. 
line, and in rare instances a second dot is present upon the inner side of each 
of these joints. The tip of the ovipositor of the females is also black. These 
are all the characters which are presented by the color in this insect. Nume¬ 
rous others, however, are derived from the form and sculpture of its several 
parts, of which we notice the following. 
The head is twice as long as wide and is inclined downwards obliquely and 
in the preserved specimens often perpendicularly. It is shaped like an egg, 
moderately flattened upon its upper side. In dried specimens it is crossed 
between the eyes by a wide shallow groove. The feelers or palpi are long aud 
thread-like, composed of cylindrical joints, of which the penultimate one is 
almost as long as the last one, which is slighty thicker, long oval, and on its 
inner side obliquely cut off in a straight slope extending two-thirds of the 
length of this joint, the face of which slope is hollowed like the inside of the 
bowl of a spoon. They are clothed with fine erect bristles, in addition to 
which the last joint is densely coated with much finer prostrate hairs. The 
antenna are double the length of the body, tapering and very slender, composed 
of a hundred joints or more, the articulations of which are faint and towards 
the apex arc scarcely perceptible. The basal joint is thrice as thick as the fol¬ 
lowing one, cylindric and but little longer than wide. The succeeding joints 
are very short, and towards the tip gradually increase in length and diminish 
in diameter, here sometimes showing tawny brown rings upon the alternate 
joints. 
The tiiorax is as wide as long and of the shape of a half cylinder, being 
rounded from above downwards, with its opposite sides parallel and its angles 
rounded. On each side low down it forms a thin foliaceous edge which hangs 
downward and curves a little outward. Both the anterior and posterior edges 
curve slightly upward and the latter is fringed with short pale yellowish hairs. 
Upon its surface posteriorly a shallow furrow’ may be seen along the middle 
and on each side of it a curved impressed line. 
The abdomen is long, cylindrical, soft and often much distorted in the dried 
specimen and discolored from inclosed alimentary matter. It ends in a pair of 
long slender tapering appendages which are about equal to the abdomen in their 
length and are clothed with fine erect whitish hairs. In addition to these in 
the female is the ovipositor, which is of the same length, with the appendages, 
reaching to the tip of the wing covers, and is of a hard horn-like substance, 
cylindrical and straight or very gently curved upwards. 
The w r iNG covers of the male have already been partly described. When 
folded together they appear perfectly flat and of the shape of an egg with its 
small end forward. They aro rather more than half an inch long, and the 
breadth of their upper horizontal portion is more than half their length. Their 
deflected outer portion or costal area is divided by oblique veinlets into about 
ten cells of a rhombic form. Above these is an elongated elliptic area reaching 
three-fourths of the length of the wing cover, bounded on each side by two 
coarse longitudinal veins which arc the proper ribs of the wing. This elliptic 
area is subdivided into several small square cells by veinlets crossing it trans¬ 
versely. The horizontal portion of the wing covers have two veins running 
parallel with the hind edge and the hind part of the inner edge. The remain- 
