748 
ANNUAL REPORT OF NEW-YORK 
HEMLOCK. 
tree; but it is very seldom that his beating net gathers anything 
from it. And I have never noticed any perforations made by 
insect larvrn in the wood or bark of this tree. The Porter 
Ilylytrupes, No. 238, is however reported to sometimes attack 
the hemlock. Its bark, oftencr than that of the apple or any 
other tree, is seen perforated with numerous holes in transverse 
rows, the work of the downy woodpecker (Picus pubescens, Lin.), 
and many persons suppose that this bird when it makes these 
holes is in pursuit of insects or their larvm, lurking in or under 
the bark. But it is solely for the purpose of regaling itself 
upon the sweetish sap of the tree that it makes these perfora¬ 
tions. The larvm of the Pine emperor moth, No. 271, is said 
to feed upon the leaves of the hemlock as well as those of the 
pine, and the larvae of some one or another of the smaller moths 
may occasionally be met with, eating the leaves. The Bound 
tree-bug, No. 100, and some others akin to it, sometimes occur 
on this tree, sucking the juices of the leaves it is probable. 
But what is most remarkable, I have never been able to find 
any plant-lice or bark-lice upon it, though I cannot but think 
it has some parasites of this kind belonging to it which future 
observations will detect. 
3. THE SPRUCE AND FIR. — Pinus (Mies') nigra , alba, ct 
balsamea. 
The Porter nylotrupes, No. 238 ana the Golden Buprestis, 
No. 223, are recorded as borers in the trunks of these trees. 
A species of wooly Aphis is frequently located upon the green 
succulent twigs of the spruces standingin our yards, and I have 
also met with another plant-louse, pertaining to the genus Lack- 
nus, in the same situation, but have never been able to find 
winged individuals, whereby to complete a description of theso 
two species. The Pine Cixius, No. 2G2, is also detrimental to 
the leaves of the spruce, as is also the two following insects. 
282- Spruce-tree leaf-hopfer, Atliysanus Abictia, Fitch. (Ilomoptera. 
Tettigonudsa.) 
Puncturing their leaves and extracting their juices the latter 
part of May and during the month of June, an oblong black 
