STATE AGRICULTURAL SOCIETY. 
463 
BUTTERNUT. LIMBS. 
to 0.30. The bark of old trees will sometimes be found every¬ 
where tilled with these grubs, which in the month of June may 
be seen changed to short thick pale-yellow pup® with a few per¬ 
fect insects that are newly hatched and have not yet left the tree. 
188. Butternut bark-louse, Aspidiotus Juglandis, Fitch. (Ilomoptcra. 
Coccidse.) 
Fixed to the bark of the twigs, minute pale brownish scales 
resembling those of the Apple bark louse No. 15, but smaller and 
not curved. This species was alluded to in my first report, 
Transactions of 1854, p. 739. I have not yet had an opportunity 
to trace out its history. Although this is so minute that the 
naked eye can scarcely discern many of the scales, it is preyed 
upon by a parasitic larva still smaller, which resides under the 
scale and feeds upon the eggs which the scale covers, changing to 
a minute four-winged fly of the family Chalcididm in the order 
Ilymenoptera, which gnaws a small round hole in the side of the 
scale through which to make its escape. 
189. Butternut scale insect, Lecanium Juglandifex, new species. (IIo- 
moptera. Coccidse.) 
Adhering to the-bark on the under side of tne limbs, a hemis¬ 
pheric dull yellowish or black scale about 0.22 long and 0.18 
broad, notched at its hind end, frequently showing a paler stripe 
along its middle and a paler margin and transverse blackish bands. 
Whether this is the same insect with the European Lecanium 
Juglandis of Bouche, I am unable to ascertain, as I have at hand 
no description of that species. The details which I herewith pre¬ 
sent of our American insect will probably suffice to enable those 
who have an opportunity of observing that species to determine 
whether it is the sanle. 
The male pup® of this insect may be seen upon the limbs in 
May. They appear the same with the pup® of other common 
species of this genus, being oblong oval, moderately elevated 
white scales about 0.10 long and half as broad, thin and some¬ 
what hyaline, with a slender snow-white line running lengthwise 
along each side of the middle and uniting at their hind ends, with 
a similar line running transversely across the scale half way be¬ 
tween its middle and its hind end. The male insects come out 
