ANNUAL REPORT OF NEW-YORK STATE SOCIETY. 
489 
field, Cook county, Illinois, who gathered them the fore part of 
September, from pines in the yard of S. Francis, Esq., in the city 
of Springfield, in that State. These insects pertain to the genus 
Jlspidiotus. No species of this genus has hitherto been discov¬ 
ered, infesting any tree of the pine or fir family. I infer this to 
be dilferent, therefore, from anything which has been as yet de¬ 
scribed, and accordingly name it the Pine-leaf scale-insect, Jls¬ 
pidiotus Pinifoliat. In size and shape these scales bear a marked 
resemblance to those of the Apple bark-louse ( J1. conchiformis) 
described in my last year’s report, except that they are not 
curved as those are. Thus their form is like that of a muscle 
shell ( Mytilus ) rather than that of an oyster. Their color more¬ 
over, distinguishes them from any of the other kinds of scale- 
insects which are known to me, it being pure white, with a small 
pale yellow spot upon the pointed end, which spot is readily dis¬ 
cerned by the naked eye. 
The leaves of the pine are three-sided or shaped like a prism, 
and it is along one of the sides of these leaves that the scales 
are mostly placed, a few scattering ones, however, frequently 
being stationed on one of the other sides. In the specimens sent 
me they are crowded as closely as they can stow themselves, and 
frequently one scale overlaps the end of the next one. They are 
arranged lengthwise in a row, extending the whole length of 
the leaf, their width being just equal to that of the leaf. The 
small end in some is towards the base, in others towards the 
apex of the leaf. 
When examined with a magnifier, those scales which are fully 
grown appear externally to be composed of three distinct scales, 
representing seemingly the head, thorax and abdomen of the 
living insect—each being of an oval form with rounded ends, 
and overlapping each other like the tiles of a roof. The largest 
of these three segments is of a pure white color, and of a some¬ 
what waxy lustre, resembling in its appearance a small oblong 
drop of spermaceti tallow. Numerous parallel curved lines are 
sometimes perceptible across its surface. Overlapping the end 
of this is a pale dull yellow scale, a third or fourth of its size, 
and having a raised line along its middle. To this succeeds 
[Assem. No. 217.] 32 
