736 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
chrysalis state, it Dither transforms within a small branch in the pith or 
under the bark. In the latter case it sinks an oval cylindrical hole in 
the pith wood, and builds up over it. in the space bet ween the loosened 
bark and the wood itself a white covering, composed of the long chips 
or fibers of the pith wood, the little libers beingclosely interwoven and 
matted together, SO as to form a cocoon of a tolerably linn consistence, 
which contrasts in its white color with the under side of the bark. The 
cocoon thus made is not usually, ifever, lined with silk. The length of 
the entire cell is 12 mm ; its breadth is .">""". Hylurgus terebtans con- 
structs similar cells, but they are much smaller. Most of the bark- 
borers, however, do not transform in such cells, but in their tunnels. 
While the insect is especially abundant in Maine, I have also found 
it in abundance iu September on the ornamental white pine bushes on 
the grounds of the State Agricultural College, at Amherst, .Mass. When 
the white pine is set out ou plantations it has thus far been tolerably 
free from the attacks of this pest. On the extensive plantation of Henry 
G. Russell, esq., at Greenwich, R. I., who has planted trees on a larger 
scale than any one elseiu New Eugland, only scattered trees have been 
affected. Fig. 2, Plate xxvn, has been drawn from a terminal twig on 
one of these trees. Part of the twig was mined uuder the bark, the 
tunnels ran close together, there beiug seven or eight on one side of a 
twig about a third of an inch in diameter. They run up and down 
the twig, more or less parallel, beginning small, when the larvae hatched 
and becoming slightly larger as the grub grew, until at the end of -4 
or 5 inches they sink into the cell, the grub having become full-fed 
and making its cell designed for its final transformation. 
When the pith is mined, the cells form enlargements of the tuuuel, 
and in the case before us the cells are so thick as to touch each other, 
there being six cells in a length of not over two inches. When the cells 
are made exteriorly, but under the bark, they are usually about an 
inch apart, and as we have said, at once by their light color and convex 
surface, attract attention when the bark is torn off. 
While this weevil does much injury to the young white pine trees, it 
is by no means restricted to such growths, but la3'sits eggs in the bark 
and mines the sap-wood of large pines and other coniferous trees. 
Thus I have found the beetles more commonly, and in different stages 
of growth, in the white pine April 24; at this date the beetles begin 
to appear ; and the beetles do not all make their exit from under 
the bark and rly about by the end of spring, but I have found the beetles 
under the bark May 30, and even as late as the 11th of August, when 
a pupa and beetle occurred, the latter somewhat pale and immature. 
This weevil is of common occurrence in the bark of spruce trees 6 to 
10 inches in diameter, where I have found them during the middle of 
August at Brunswick. Me. The grub and pupa occurred near the Glen 
House, White Mountain, New Hampshire, at the end of July in the fir; 
on the 30th of July I took five mature beetles from under the bark of 
a hemlock tree. I have never noticed, however, spruce, fir or hemlock 
