INSECTS INJURIOUS TO THE PINE. 181 
Mr. Kellicott gives the following account of this insect : 
‘* When studying the larval habits of Pinipestis zimmermani in 1878~79, 
I met with the larva and pupa skins of two moths evidently different 
from the pine pest, yet having quite similar larval habits. During the 
past summer I succeeded in getting the moth of one of them; it is an 
A gerian, as I think, undescribed, but I would not venture upon describ- 
ing it had I only the imago; but as I am able to give mainly its history, 
and having doge so much tramping and climbing for its sake, that I 
have come to feel a proprietary right, [ undertake to name and describe 
itas new. As its proposed name implies, the larva inhabits the pine, 
boring under the bark and into the superficial layers of the wood. From 
the wounds thus made pitch exudes, which, through the action of the 
larva and the warmth of the sun, forms hemispherical masses over its 
burrows; in these masses the pupa cells are finally prepared and the in-| 
active stage passed. The larva occurs more frequently than elsewhere 
just below a branch; sometimes about the border of a wound made by the 
axe, or where a limb has been wrenched off by the wind; rarely in the 
axil of the branch. It appears to attack larger trees than the Zimmer- 
man’s pine pest, and more frequently occurs at considerable, altitude. 
IT have taken them thirty to forty feet from the ground. While they 
sometimes, perhaps as a rule, take advantage of the broken cortex, I 
ad 
have found them where it appeared that they had worked through the 
same into the soft layer. 
“T have found the larva in the following localities: Hastings Center, 
N. Y.; Portage, N. Y., Buftalo, N. Y. (?); Point Abino, Ontario. At 
the first-named place, they were found in several instances numerous 
enough to seriously injure trees of moderate growth. I have taken the 
larve in autumn from 0.25 to 0.75 of an inch in length; they finally 
attain a length of 1 to 1.1 inch; diameter quite uniform, 0.15 of an inch. 
Color white; head light brown, flattened; first thoracic ring slightly 
clouded with brown, smooth; no trace of an anal shield; true legs 
scarcely colored, pro-legs prominent, crowned with two rows of about 
eight hooks each. The brown hairs arise from papille, the base of each 
hair being surrounded by a brown annulation. The spiracles are but 
slightly elliptical, last pair large, placed sub-dorsally. 
‘“‘ Before transforming they prepare a cell in the extruded pitch min- 
gled with their débris; this they line with silk, but spin no other co- 
coon. While in their burrows they move through the soft pitch with 
impunity, but if removed from the same they soon die from the encum- 
brance of the hardening pitch adhering to them. 
Lhave found the pupa the last of May; the moth appears from the 
middle to the end of June. It may be that others come in July and 
August, for I have found larvee apparently full grown in July. On the 
15th of July I brought to my rooms, devoted to the rearing of insects, 
some blocks of wood containing such apparently mature larvee, expect- 
ing them to complete their transtormations in a few weeks at most; 
