INFESTING FOREST TREES. 
THE PINE. 
AFFECTING THE TRUNK. 
Patches ofj white, flocculont, down-like matter on the smooth bark, covering exceed¬ 
ingly minute lice invisible to the naked eye. 
The Pink Bliget _ Coccus Pinicorticis. 
Upon young White Pine trees, especially those which are 
transplanted to ornament our yards, may frequently be seen a 
species of blight, showing itself in the form of a white, flocculent 
cotton or down-like substance growing upon the smooth bark, par¬ 
ticularly around and immediately below the axils 
where the limbs are given off from the main trunk 
of the tree. Often small white spots of this 
same substance are scattered irregularly and more 
or less densely over the whole of the bark from one 
whorl of limbs to another. It is upon the north or 
shaded side of the trees that these patches are most numerous, 
and upon the lower part of the body of the tree, where the foliage 
of the limbs growing above, produce a constant shade. Those 
parts of the body of the tree which are much exposed to the light 
of the sun are seldom, if ever, coated with any of these spots. 
Where a tree is much coated with this white substance, it be¬ 
comes sickly and presents a slender, dwindled appearance, its 
leaves are short and stinted in their growih, and of a dull green 
color, aud the annual growth of the tree is much curtailed. 
If, with the point of a needle, this white cottony substance be 
carefully parted asunder, under it, attached to the bark of the 
tree, may frequently he found the insect which is the cause of this 
