STATE AGRICULTURAL SOCIETY. 
391 
GRAPH. LEAVES. 
the upper margin of the head and the breast being also black and 
the wings hyaline. Length of the male 0.15, of the female 0.20. 
Numbers of this insect may sometimes be met with on grape 
vines, about the last of July, and a few stragglers remain into 
October. The anticonigra of M. Fairmaire, (Ann. Soc. Ent., 2d 
series, iv. p. 498,) differs from this species only in having the fore 
wings with coarse black cr brown veins. All of the many speci¬ 
mens which I have met with in the state of New-York, have the 
wing veins colorless. This insect and the calva of Say, which is 
slightly smaller and shining black, with the face, shanks and feet 
dark yellowish, the tip of the thorax and abdomen pale greenish, 
and the wings hyaline, are the only New-York species of Jlcutalis 
which I have discovered, although several others occur in Penn¬ 
sylvania and farther south, and some of them are quite numerous 
upon the kinds of vegetation which they infest. 
101 . Vine leaf iiopper, JErythroneura Vitis, Harris. (Homoptera. Tet- 
tigoniidse.) 
Pale yellow with two broad blood-red bands and a third dusky 
one on the apex, the anterior band occupying the base of the 
thorax and of the wing covers and scutel, the middle one ending 
in a much narrower nearly square black spot situated on the 
middle of the outer side of the wing covers. Length 0.13. 
Though so small such swarms of these insects sometimes gather 
on the vines in August and bleed the leaves so freely that they 
become dry and stiff and of a yellow color, as when fading in 
autumn. See Harris’s Treatise, p. 198. 
There are numerous kinds of little leaf hoppers similar to those of the vine. 
Hitherto they have all been included in the genus Typhlocyba by authors. In 
consequence of their diminutive sine they have been less investigated than tho 
other insects of the order to which they pertain. The number and arrange¬ 
ment of the veins in their wing covers and wings, present such differences as 
would probably have induced authors to separate them into distinct genera, 
before this day, had they been of larger size and better known. The species, 
moreover, are so numerous, and will be so largely increased no doubt by future 
discoveries, that as a matter of convenience a separation among them appears 
to be required. The characters assigned to the genus Typhlocyba, by different 
authors, are very confused and contradictory, as they have been drawn from 
one or another of the species, some defining it as with, others, without ocelli, 
e tc. I was, hence, wholly at a loss with respect to the insects which it was 
