STATE AGRICULTURAL SOCIETY. 
839 
LOCUST. LEAVES. 
339. Sat’s weevil, Apion Sayii, Schonhorr. (Colcoptera. A ttcl abides.) 
From June till September, eating numerous small round holes in the 
leaves, a little black weevil with a slender projecting beak, its thorax with 
close coarse punctures and an oval or longitudinal indentation back of its 
centre, and the furrows of its wing-covers with coarse punctures, its length 
0.09 and to the end of its beak 0.12. 
This species is common throughout the United States and is perhaps the 
most numerous of any beetle of the weevil kind which we have in our 
country, but being so very small it is seldom observed. It probably breeds 
in the seeds of the locust and of various other species of the Natural Order 
Leguminosce, Ur. Harris having met with it in all its stages in the seeds 
of the Baptisia or wild indigo. It would be regarded with confidence as 
forming two or three distinct species were specimens in the cabinet alone 
examined. Thus, among a number of individuals taken upon- the leaves 
of the locust, some will usually be met with in which the indentation back 
of the centre of the thorax is round and appearing like an impression made 
by the head of a pin, instead of being oval or oblong. And in others this 
indentation is prolonged, forming a small furrow along the middle of the 
thorax its whole length. It is quite customary at the present day to re¬ 
gard all such differences in the sculpture of beetles as sufficient characters 
by which to separate them into distinct species. We however cannot but 
deem that a large portion of the species which are thus founded will eventu¬ 
ally be discovered to have no valid existence in the domain of nature. 
340. Two-spottkp tuee-uoppeu, Thclia bimaculata f Fabrioius. (Homopfcera. Mem- 
bracidte.) 
In September, puncturing the twigs and sucking their juices, a brown 
triangular tree-hopper 0.50 long and having a form analagous to that of a 
beech-nut., with a long horn running obliquely forward and upward over¬ 
hanging the head and compressed and rounded at its end, a large oblong 
bright yellow or dull gray spot on each side, widening anteriorly, its thorax 
as long as the wings, sharp-pointed at its tip and with elevated lines 
posteriorly. 
I have never met with this species north of Albany, although it is not 
rare in the southern part of this State and of New England, and extends 
' from thence through the southern and south-western States. 
The Buffalo tree-hopper, $21, is also common upon the locust, 
stationing itself in the axijla or angle where the leaf stalk arises from the 
limb. In August, upon the green succulent twigs it is not rare to find one 
of these tree-hoppers thus stationed, at the base of almost every leaf. 
3. THE ELM — Ulmus Americana et fulva. 
AFFECTING THE TRUNK. 
341. Trident Saperda, Saperda tridentata, Olivier. (Colcoptera, Cerambyoidffl.) 
Consuming the inner bark of the slippery elm, (Ulmus fulva,) in decay¬ 
ing and dead trees, a white grub about half an inch long, slightly tapering 
and with strongly constricted sutures dividing it into twelve rings, of which 
