ANIMALS INJURIOUS TO FOREST AND ORNAMENTAL TREES. 37 



of the piece of timber, though they get very near the edge at times. 



When nearly full-grown, from the end of September onwards, the 



larva leaves its position between the bark and the wood, making a 



FIG. 13. -PIECE OF LARCH BORED BY LARVAE, 

 showing entrances to six pupal chambers. 



