STATE AGRICULTURAL SOCIETY. 
123 
PINE. TRUNK. 
are about 0.10 wide and 1.50 to 2.00 long, all belonging to the 
the same cluster being of nearly equal length. Along the sides 
of these grooves several short sinu¬ 
ous excavations or notches appear, 
in which the eggs have been placed, 
where they would remain undis¬ 
turbed by the beetle as it crawled 
backwards and forth through the 
gallery. The accompanying figure 
is a representation of one of the 
clusters of these tracks, copied 
from the surface of the wood. In 
this instance the commencement of 
some of the galleries and the prin¬ 
cipal part of the lower one on the 
right hand had been excavated 
wholly in the bark and thus made 
no mark upon the wood. 
M. Perris has ascertained that 
with the European T Laricis , which 
excavates several galleries from a 
common centre like the insect now before us, a male beetle is 
found in each of the galleries, whilst only one female is associ¬ 
ated with them, she being stationed sometimes alone, in the 
centre, and at other times in one of the galleries in company 
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 
main 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 become widened and broad as we find them, 
their width being much greater than those of the other species, 
although tho insect is but the usual size. 
