. Documentary journal of Indiana 1905 . Fig. 18. Work of an engraver beetle upon white pine. The channels arecut ju-st beneath the outer bark. In the above drawing the bark has been re-moved down to the tender Fig. 19. Scalytids-eugraver beetle. Found making completerings under the outer bark of the white pine. State Board of Foeestry. 163 are mostly cylindrical in form and of small size, many of thembeing microscopic. They are usually dark in color, maiiy of thespecies work just under tlie bark, and still others bore down into thesolid wood. The members of this family are among the mos
. Documentary journal of Indiana 1905 . Fig. 18. Work of an engraver beetle upon white pine. The channels arecut ju-st beneath the outer bark. In the above drawing the bark has been re-moved down to the tender Fig. 19. Scalytids-eugraver beetle. Found making completerings under the outer bark of the white pine. State Board of Foeestry. 163 are mostly cylindrical in form and of small size, many of thembeing microscopic. They are usually dark in color, maiiy of thespecies work just under tlie bark, and still others bore down into thesolid wood. The members of this family are among the most dan-gerous of the insect enemies of forest trees. In many cases treesare killed outright, but in others although the life of the tree is nottaken tlie wood is much injured by the burrows. In some cases wedecided that some ash and pine trees had been killed by thesebeetles, but we found by far the greater number on dead or dyingwood.
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