Coarse writing bark beetle, T o m i c u s c a 1 1 i g r a p h u s Germ. 



1 Inner aspect of badly eaten white pine Ixirk 



2 Several galleries preserved by infiltrated jjitch 



3 Internal aspect of badly scored bark 



4 Portion of bark removed from a tree which had been dead some years. 



most of the galleries being preserved by infiltrated pitch 



770 



