Packard.] 
mSECTS OF THE FOREST. 
251 
selves, which are found from July until October. It is 
probable that some of the flies may hibernate in their holes, 
as they were found in the tree as late as October. By means 
of her enormous saw or ovipositor, which she drives to the 
depth of half an inch through the bark into the wood, the 
female effects a safe lodgment for her eggs. They are apt 
to be social, and one may oQ;en see large numbers of them 
around a favorite tree, riddled with their holes, in some place 
previously wounded' and deprived of the bark. Maples are 
Fig. 192. 
Poplar Tree Borer. 
Fig. 193. 
Flea Beetle. 
sometimes killed by a beautiful JEgerian moth, which bores 
into the living trees. 
Several of our most common and beautiful moths, as cat¬ 
erpillars, prey on the maples, from the minute Tineids up to 
the large rubicund Dryocampa and the lo moth (Figs. 64, 
65). The leaves are sometimes mined by minute moths 
allied to our clothes moths. These little caterpillars are 
often flattened and in other ways curiously adapted for their 
life between the thin walls of their abode. The number of 
these mining moths is exceedingly great, and if any one 
could be found to devote his leisure to rearing them, and 
observing with care (note book in hand) their habits, he 
would confer a benefit to science. Nowhere more than 
27 
