490 
ANNUAL REPORT OF NEW-YORK 
another, half the size of the preceding, this third segment being 
subhyaline, yellowish, and obtusely striated transversely. Be¬ 
neath, this scale is white its whole length, without any indica¬ 
tions of those divisions which appear upon its upper side. It is 
the tenth of an inch in length. Specimens but half grown are 
interspersed with the others, and all the scales on some of the 
leaves are of this small size. These show a raised line or slightly 
elevated keel along the middle of the white portion. Other 
specimens still, are merely minute oval dull yellow scales, with¬ 
out any whiteness at the end. 
The scales which we have now described are the relics of the 
dead bodies of the female insects, forming a shield for covering 
and protecting their eggs. At the time the specimens before me 
were gathered the eggs had not become developed. Consequently 
on elevating one^and another of these scales with the point of a 
needle, nothing is found beneath them except a small shapeless 
mass of dried black matter, the remains of the viscera of the 
insect. But at any time during the winter season, the little 
cavity under these scales will undoubtedly be found filled with 
minute round eggs. And the transformations of this species 
will be similar to those narrated of the Apple bark-louse. 
It is evident that an insect of the pernicious character of the 
one under consideration, when so abundant as this appears to 
have been upon the pines ffom which the specimens before me 
were gathered, would soon cause the leaves to perish and the 
trees to die, if permitted to proceed unchecked in its career. 
But, fortunately, nature has in this as in most other analogous 
instances, provided means for restraining these creatures from 
becoming unduly numerous. A minute worm which feeds upon 
the eggs of the Apple bark-louse was noticed in our account of 
that species. Another insect, a species of Lady-bird, or Cocci- 
nella, common throughout the United States, devours both the 
Apple bark-lice and those of this species. I have repeatedly met 
with this Coccinella upon apple trees, but had not ascertained 
which particular kind of vermin it was in pursuit of upon those 
trees. For authentic information upon this interesting topic we 
are indebted to Mr. Kennicott, who has observed the larv® of 
this lady-bird preying with tigep-like ferocity upon the App le 
