8 FARMERS’ BULLETIN 63. 
gum formation, after which the larve make short work of the 
trees. 
The beetles leave their hibernation cells early in the spring and 
migrate to other trees, brush heaps of prunings, or any suitable wood 
wherein eggs can be deposited. The 
female bores into the bark, forming a 
hole very similar to that made by the 
fruit-tree barkbeetle, but distinguished 
from it by the particles of excrement, 
held together by fine threads of silk, 
which partly fill the mouth of the bur- 
row or hang therefrom. The brood 
chamber (see figs. 8, 9) may be any- 
where from 1 to 24 inches in length. It 
may be told at a glance from that of 
the species described previously by the 
[ATT 
cross the grain of the wood transversely, 
instead of extending parallel with it, and 
that there is a short side tunnel branch- 
a 
ee = == = = = =j — \ \\\\ \\ \\ Si) 
“Al 
Fig. 8—The peach-tree bark- I'ig. 9.—The peach-tree barkbeetle: Brood chamber 
beetle in wood of peach tree: with egg pockets and larval galleries in wood of 
Brood chambers and larval peach tree. Lakeside, Ohio, May 18, 1908. En- 
galleries. (H. F. Wilson.) larged. (HH. F. Wilson.) 
ing from the main chamber near the inner end. This side branch 
enables the female to turn around within the burrow and is occupied 
by the male at the time of mating. 
The small, white eggs (fig. 7, ¢) are deposited in little pockets 
excavated from the walls of the brood chamber (see fig. 9), from 
fact that almost invariably it is made to: 
7 
ee 
