Bui. 83, Part I, Bureau of Entomology, U. S. Dept, of Agrici, 



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1. brevicomis 



2. barberi H 



3. convexifro 



4. frontalis Z 



5. arizonicus 



6. mexicanus 



7. paralleloct 



8. approximc 



9. monticolx 



10. ponderosx 



11. jeffreyi Ho 



12. simplex Le 

 _ 13. pseudotsug 



14. piceaperda 



15. engelmann 



16. borealis He 



17. oiesus Mar 



18. rufipennis 



19. murrayana 



20. punctatus I 



21. micans Kuj 



22. terebrans O 



23. valens Lee. 



Position doubtful— 24. adjunctus I 



Classification of the Genus Dendroctonus 

 Names and Specie 



This diagram will enable the reader to refer at o 

 of any species number mentioned in the text 

 and relations of the divisions, subdivisions, £ 

 into which the genus is divided. 



