INTRODUCTION. 



the various species of Scolytidce, of whose appearance and 

 proceedings some idea may be obtained from the accompa- 



1, 2, Tomicui typographiu 3, 4, 5, 6, Hylurgiu pinipcrda (natural lize and magnified) . 



nying figures. The gigantic larva; of the longicom hectics. 

 goat-moths, Siricidee, &c., are not less destructive. In 



Track ut Typographer Bertie under bark. 



boring through the solid wood of various trees; whilst an 

 ant (Formica saccharivora), which takes up its abode in tin- 

 stem of the sugar-cane, has proved at certain periods in the 

 highest degree injurious. But it is upon the leaves aud 



