Coarse writing bark beetle, T n m i c u s c a 1 1 i - r a p h u s (}oim. 



1 Bare wood sLirtace of white pine tree badly scored by galleries 



2 Pitch tubes on the trunk of a badly infested tree 



3 Rorino;-s showing the entrance or central chamber under a pitch tube, the 



adult and hirval o-alleries 



4 A pitch tube in profile 



768 



