174° ‘INSECTS INJURIOUS TO FOREST AND SHADE TREES. 
row, in which a live and a dead beetle were found, both of them females, 
and the only specimens of this species whieh have come under my 
observation. The transverse burrow was excavated in the sap wood at the 
depth of halfan inch froin its outer surface. Near its middle it was crossed 
by another perforation extending from the outside directly towards the 
heart of the tree, which is indicated by a black dot in the figure; and 
at this point the burrow curved slightly outwards towards the exterior 
surface, as represented in the section above the principal figure in the 
cut; and at its end on the left, where it passed out of the billet of wood, 
it commenced curving inwards towards the heart of the tree. Twelve 
lateral burrows of the same diameter as the transverse one extended 
upwards and two downwards, as shown in the figure, all of the same 
length, each one having been excavated probably by a single larve. 
The gallery of our insect thus differs widely from that of the European 
species (7. eurygaster Krichson) which mines in the interior of the pine, 
which has no lateral burrows branching off from it. 
The presence of these timber-beetles in the wood can be distinguished 
from those which mine under the bark by the little piles of sawdust 
which they throw out at the mouth of their burrows, this dust being so 
much more white and clean, and not composed in part of the brown or 
rust-colored particles of gnawed bark which are intermixed with the 
dust produced by the bark-beetles. (Fitch.) 
The beetle.—In addition to the short description of this beetle which 
is given above, it may be observed that the head is finely punctured, 
the punctures on the face giving out small pale yellowish hairs, while 
those on the vertex or crown are destitute of hairs, and there is a 
slight transverse elevation of the surface between the face and the 
vertex, from which an elevated smooth line extends backwards along 
the middle of the vertex. Thorax, when viewed from above, with its 
base transverse and rectilinear, its basal angles rectangular, its opposite 
sides parallel for a distance equaling the length of the base, and from 
thence rounded ina semicircle at its anterior end; its surface anteriorly 
with minute asperities, which, viewed vertically, appear like fine trans- 
verse wrinkles; its basal half with very minute punctures, and in its 
center a small transverse tubercle. Wing-covers with fine shallow puncet- 
ures in rows; the upper part of the apical declivity moderately de- 
pressed in the middle, producing a slight concavity in its outline when 
viewed from above anteriorly, the suture not elevated in this depression, 
but showing a slightly impressed line along each side; the hind end 
bearded with hairs similar to those upon the front. Under side black, 
the legs and antenne pale dull yellow. (Fitch.) 
We have found this beetle in the pine woods of Maine; it was kindly 
identified for us by Dr. Leconte. It bores deep into the sapwood of Pinus 
strobus in long nearly straight burrows; the beetles may be found in them 
in March, their heads pointing towards the center of the tree. 
This species, or one very similar toit, has been found by Mr. Hunting- 
