INFESTING FOREST TREES. 
1. THE PINE. 
AFFECTING THE LEAVES. 
Fixed upon the sides of the leaves, exhausting them of their juices; small 
oblong flattish white scales, with a pale yellow spot upon their pointed 
end. 
The Pine-leaf Scale-insect, Jlspidiotus Pint folia, new species. 
In those sections of our country where it is not common as a 
native of the forests there is scarcely any tree which is more 
esteemed for ornamenting the grounds around a dwelling than 
the white pine. Especially is it a favorite, and strenuous 
attempts are making to cultivate it about houses upon the prai¬ 
ries of the west; its tall growth and perennial foliage adapting 
it so well for a shelter from the winds of winter which sweep 
over those vast plains with such piercing severity; whilst by 
many of the residents there it is further prized as having been 
associated with the scenes of their early life, and thus reviving 
pleasant remembrances of their childhood’s home. 
But when it is transplanted the pine appears to be much more 
subject to the attacks of insects than when it is growing sponta¬ 
neously. At least we meet with some kinds of these depredators 
upon cultivated pines, which we have never been able to discover 
upon these trees when growing wild in our forests. One of these, 
a species of coccus infesting the bark, and named the pine blight, 
was described in my First Report. We come now to treat of 
another insect of the same Family Coccidje, which fixes itsell 
upon the leaves, exhausting them of their juices and thus causing 
them to perish and fall, and the ends of the limbs to die when 
thus defoliated. Specimens of the leaves, thronged with these 
insects, were sent me by Robert W. Kennicott,. of West North- 
