70 INSECTS 



other enlargements. There is, therefore, scarcely a 

 method of attack that is not represented among the 

 snout beetles. 



FIG. 28. A piece of hickory bark, illustrating the work of Scolytus 

 4-spinosus and its larva. 



The Scolytids or bark beetles deserve separate 

 mention, as they are among the most dangerous of all 

 tree enemies and the greatest destroyers of wood tissue, 



