STATE AGRICULTURAL SOCIETY. 
386 
CHERRY. LEAVES. 
transparent wings tinged with smoky which forms a dusky cloud 
across the middle of the fore pair, its four anterior legs and the 
knees of the hind pair dirty yellow or clay colored, their thighs 
blackish. Length 0.22. See Harris’s Treatise, p. 419. 
93. Cherry Abia, Abia Cerasi, new species. (Hymenoptera. Tcnthre- 
dinidae.) 
I only know this and the following species from specimens bred 
from cocoons found attached to the limbs of the wild black 
cherry, which is a sufficient evidence that their larvae subsist upon 
the leaves of this tree. Like other larvae of the same genera, 
they will be twenty-footed worms, having two pairs of pro-legs 
more than the usual number, and they eat the edges of the leaves. 
The cocoons of both these insects are cylindrical with rounded 
ends, and are of a tougli firm texture, resembling coarse brown 
paper. Those of the cherry Abia are 0.80 long by 0.38 in 
diameter. Two of these cocoons were met with last March, upon 
a low bush within three feet of the ground. One of them had 
been perforated by birds and its inmate destroyed; the other 
on being brought into a warm room hatched within a fortnight, 
indicating that with the first warm days of spring these flies come 
abroad. They cut off one end of the cocoon smoothly, to make 
their exit from it, the severed end resembling a little lid, some of 
the loose threads upon the outer surface of the cocoon forming a 
hinge whereby this lid can be opened and shut. The fly is black 
with the abdomen and thighs blue black and the feet and tips of 
the shanks pale yellow. Its thorax is thinly covered with pale 
grayish yellow hairs, and its wings are transparent, smoky 
yellowish, with black veins, those on the basal third pale yellow. 
Length 0.60, to the tip of the wings 0.80; width 1.35. 
The species of this genus are very few, and little is known of 
their habits. This is the first one, I believe, which has been 
found in this country. It resembles a Cimbcx , the antennae being 
short, with a round knob at their ends shaped like an egg with 
its large end outwards, and in the specimen before me there are 
tour joints to this knob, and four in the stem which precedes it, 
this being one joint more than the normal number in this genus. 
[Ag. Tuans.] Y 
