Useful Insects. 



Plate I. 



Injurious Insects. 



6. 7. 



/s. 



L IchneumonFly (Ichneumon nigritarius). 

 !. Gold Beetle (Clerus formicariusj. 

 I. Predatory Fly (Tachina laemgata), 

 t. Pine Beetle (Hylurgus piniperda). 



5. 8 -toothed Spruce Bark -Beetle (Bost- 



ri.chns typographusj. 



6. Large 12 -toothed pine Bark -Beetle 



(Bostrichus stenoyraphusj. 

 Green Saw-horn Beetle ( Agriluswridis). 

 o. Small brown Pine weevil (Pissodes 

 notatusj. 



9. Eed Poplar Leaf -beetle (Lina populi). 



10. Pine weevil (Hylobius abietisj. 



11. Large Poplar Cervicorn (Cerambyx 



CarchariasJ. 



12. Spanish Fly (Lytta vesicatoria). 



13. Larval galleries and pupal chambers 



of Pissodes notatus. 



14. Larval galleries of Hylurgus pini- 



perda. 



15. Larval galleries of Bostrichus chalco- 



graphus. 



