714 FIFTH REPORT OP THE ENTOMOLOGICAL COMMISSION. 
tin* fingers <>f a hand spread apart or to the track of a bird. From a 
common center they ran <>H* in opposite directions np and down the tree, 
lengthwise <>t' the grain, moderately diverging <>i nearly parallel with 
each other, appearing when the bark is Btripped off like linear grooves 
in the outer surface of the wood and inner surface of the hark. They 
are about .10 wide and L50 to 2.00 long, all 
those belonging to the same cluster bein_ 
oearly equal length. Along the sides of tl 
grooves several short sinuous excavations or 
notches appear, in which the eggs have been 
placed, where they would remain undisturbed 
by the beetle as it crawled backwards and forth 
through the gallery. The accompanying figure* 
VLX-V is a representation of one of the clusters of these 
"^ZlZ^^Z^ tracks, copied from the surface of the woo.l. 
In this intsance the commencement of some of 
the galleries, and the principal part of the lower one ou the right hand, 
had been excavated wholly in the bark, and thus made no mark upon 
the wood. 
M M< Perris has ascertained that with the European Tomicus laricis, 
which excavates several galleries from a common center like the insect 
now before us, a male beetle is found in each of the galleries, whilst 
only one female is associated with them, she being stationed sometimes 
alone, in the center, and at other times in one of the galleries in com- 
pany with the male. And from his observations it appears that these 
galleries are excavated by the males, each of them being the work of 
one individual, whilst the female supplies the whole of them with eggs. 
"As there are no lateral galleries branching off from these maiu ones. 
I infer that the young of this insect move and feed along the sides of 
the galleries in which they are born, and that thus these galleries be- 
come widened and broad as we find them, their width being much 
greater than those of the other species, although the insect is but the 
usual size.'* (Fitch.) 
AYe have little to add to the foregoing account as to the habits of 
this bark-borer. It is common in the pine woods of Maine, making 
burrows under the bark, not always so regular as Fitch's figures. 
This timber beetle is common in the timber region of the Rocky 
Mountains of Colorado, boring irregularly into the inner bark of Abies 
menziesii. The burrows are like those made by the same insect in the 
white pines from Maine to North Carolina. On the Atlantic coast the 
more regular burrows radiate from a common ceuter. Those observed 
on Gray's Peak were .08 inch in diameter. 
In the pupa the body ends in two long, pointed, horn-like appendages 
arising from each side beneath. The ends of the hind tarsi extend to 
■ Not here reproduced. 
