Tech. Series 17, Part I, Bureau of Entomology, U. S. Dept. of 



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1. brevicomis 



2. barberi He 



3. convexifrot 



4. frontalis Zi 



5. arizonicus 



6. meocicanus 



7. paralleloco 



8. approxima 



9. monticolas '. 



10. ponderosse 



11. jeffreyi Ho 



12. simplex Le 



13. pseudotsug. 



14. piceaperda 



15. engelmanni 



16. borealis He 



17. ofcems Mar 



18. rufipennis '. 



19. murrayana 



20. punctatus 



21. micans Ku 



22. terebrans C 



23. valens Lee. 



Position doubtful— 24. adjunctus ] 



Classification of the Genus Dendroctonus, 

 Names and Species 



Thia diagram will enable the reader to refer at oi 

 of any species number mentioned in the text, 

 and relations of the divisions, eubdivisione, se 

 into which the genua is divided. 



