INSECTS INFESTING FRUIT TREES. 
THE APPLE .—Pyrus Malus. 
AFFECTING THE ROOT. 
1. Applbroot blight, Pemphigus Pyri, Fitch. (Homoptera. Aphidse.) 
Wart-like excrescences growing upon the roots, sometimes of an 
enormous size; containing in their crevices exceedingly minute 
pale yellow lice, often accompanied with larger winged ones, 
having their bodies covered with a white cotton-like matter. 
The mature, winged insect, a black fly with a dull greenish 
abdomen and the wings transparent but not clear and glass-like, 
with a faint smokiness at their tips, in the cell or space inclosed 
by the last of the four oblique veins. Length to the end of the 
wings nearly or quite a quarter of an inch, (0.25.) See Tran¬ 
sactions of the New-York State Agricultural Society, 1854, page 
709. 
AFFECTING THE TRUNK. 
Worms beneath the bark, mining cavities in the outer sap wood and boring holes 
in the heart wood. 
These are the most pernicious enemies which the apple tree 
has, whole orchards of young trees, if neglected, being almost sure, 
of late years, to become suddenly infested and destroyed by one 
or more of these insects. 
2. Apple tree borer, Saperda bivittata, Say. (Coleoptera. Ceram by cida;.) 
[Plate I, fig. 2.] 
A large cylindrical white footless grub, rather oroadest ante- 
riorly, its head chestnut brown, its mouth black. Excavating 
[Ac. Trans.] 
U 
