Bui. 83, Part I, Bu 



i of Entomology, U. S. Dcpt. of Agfic 



i 



1 1 



A 



a 2 b 



c 2 



B 



L 



Position doubtful— 



5 § 



2 a 



1. brencomis Lee. 1. Western Pine 



Beetle. 



2 barberi Hopk. 2. Southwestern Pine 



Beetle. 



3. convexifrons Hopk. 3. Eoundheaded Pine 

 Beetle. 



). frontalis Zimm. 

 5. arizonicus Hopk. 



4. Southern Pine 



Beetle. 



5. Arizona Pine 



Beetle. 



6. mexicanw Hopk. 6. Smaller Mexican 



Pine Beetle. 



7. parallelocoUis Chap. 7. Larger Mexican 



Pine Beetle. 



8. approximulws Dietz. 8. Colorado Pine 



9. monliculx Hopk. 

 Hi. panderosx Hopk. 



1 1 . jrilh-iji Hopk. 



9. Mountain Pine 

 Beetle. 



10. Black Hills Beetle 



11. Jeffrey Pine Beetle 



12. aimplexlac. 12. Eastern Larch 



Beetle. 



13. pseudotmgm Hopk. 13. Douglas Fir Beetle 



L4. piceaperda Hopk. 14. Eastern Spruce 

 Beetle. 



15. engelmanni Hopk. 15. Engelmann Spruce 



Beetle. 



16. borealis Hopk. 16. Alaska Spruce 



17. otous Mann. 



17. Sitka Spruce Beetle 



18. rufipennis Kirby. 18. Redwinged Pine 

 Beetle. 



li). uuirrayanx Hopk. 19. Lodgepole Pine 

 Beetle. 



20. punctatus Lee. 20. Allegheny Spruce 

 Beetle. 



21. micans Kug. 21. European Spruce 



22. terebrans Oliv. 

 2H. valens Lee. 



24. adjunctus Bland f. 



103 

 1(16 



132 

 132 



136 

 137 

 139 

 140 



146 



22. Black Turpentine 



Beetle. 



23. Red Turpentine 153 



Beetle. 



24. Guatemala Beetle 



Classification of the Genus Dendroctonus, Showing Technical and Common 

 Names and Species Numbers. 



This diagram will enable the reader to refer at once to the technical and common names 

 of any sprees number mentioned in the text, and will shoVat a^lancTKoS 

 into ffihThele^ SSS&- MlvWM * ^^ SQbsecti ^ SS and^eS 



