STATE AGRICULTURAL SOCIETY. 
827 
OAK. LEAVES. 
at times of becoming excessively multiplied. But as the history of so 
very few of these small moths is at present known, I avail myself of this 
opportunity to place this species on record ; and I add such a description 
of it as will henceforth serve for its clear identification. 
The larva is grass green throughout, or towards each end and beneath of a slightly paler 
apple-green color, and along its back is a narrow stripe of a deeper green, produced by the 
internal viscera. It tapers slightly posteriorly and less so anteriorly. On each of its rings 
small pimples are symmetrically placed, from each of which grows a short white hair; and 
low down on each side is a slight fold of the skin, forming a slender elevated line. The head 
is round and slightly flattened and as thick as the neck into which it is sunk. If expelled 
from its retreat, it wriggles violently about, and by means of a fine thread drops itself very 
suddenly towards the ground and hangs suspended, till the disturbance ceases, whereupon it 
climbs up again to its former quarters. 
The moth has fore wings which aro twice as long as wide, their opposite sides parallel, their 
outer side very nearly straight with an inward curve at the base, their hind ends cut off some¬ 
what obliquely and rounded like a slightly bent bow. Their surface is feebly glossy and about 
equally occupied by straw yellow and tawny or light brownish yellow, this latter color form¬ 
ing numerous small spots which are confluent into broken and irregular bands, tbe bands also 
running into each other. Two of those bands are more distinct and continuous, and when 
viewed vertically aro of the same tawny yellow color with the other marks, but when viewed 
obliquely they are of a darker leaden or silvery brown hue, nnd are imperfectly edged with 
lines of a deeper brown color. One of these bands extends from the middle of (he inner to the 
fore part of the outer margin. The other is almost parallel with this, running from the hind 
margin near the inner .angle to the outer margin, where it is usually thickened or forked. 
The space back of this last band is slightly paler and less densely spotted, its only marks fre¬ 
quently being a broad oblique stripo from near the middle of the band to the tip, eiosscd by a 
curved band running nearly parallel with the hind margin, both these markshaving thesamo 
leaden brown reflection with tbe two bands. Back of this on the hind edge nnd base of the 
fringe is a smooth tawny yellow band. The head is rough from loose scales, the feelers pro¬ 
jecting in front like a short conical beak, their apical joint being small but distinct; and the 
spiral trunk is quite short, when uncoiled reaching but little beyond the tips of the feelers. 
327. Oak leaf-miner, Argyromigcs QucrcifoUella, now species. (Lcpidoptcra. Ypono- 
moutidte.) 
A whitish blister-like spot half an inch long and showing upon both 
surfaces of the leaves of the white oak, this spot on the upper side elevated 
into a fold, forming a cavity in the interior of the leaf, in which lies a 
small white flattened worm abruptly thicker at its fore end, which feeds on 
the interior of the leaf, and passes its pupa state in the same cavity, finally 
producing a minute snow-white moth, its fore wings pale golden yellow 
with a black dot on their tips, a white stripe on their outer side at base, and 
four triangular silvery white spots along the outer and two larger ones upon 
the inner margin, its width 0.30. 
This leaf-miner is a minute worm which subsists upon the parenchyma or 
green pulpy substance inside of the leaf. This it consumes, leaving the 
cuticle or thin outer skin which covers it entire. The worm is flattened 
and little thicker than writing paper, appearing as though it had been dis¬ 
torted from being pressed between the two surfaces of the leaf. Upon the 
under side of the leaf its cell resembles a blistered spot ot a dull nankin 
yellow color and an irregular oval form, half an inch long or a little more 
