Pine bark borer, T o m i c u s p i n i Say 



1 Surface of white pine bark showini;' numerous exit lioles and small })itch 



tubes 



2 Internal aspect of the same piece of bark showing galleries of Tomicus 



anil ^'ouno- Monohammus and also exit holes 

 The lii^ht background used in both jihotograplis, makes the exit holes 



appear as white spots 



778 



