Tech. Series 17, Parti, Bun 



of Entomology, U. S. Dept. of Agricultun 



a 



a 



PLATE I. 



1. bremcomis Lee. 1. 



2. barberi Hopk. 2. 



3. convexifrons Hopk. 3. 



4. frontalis Zimm. 4. 



5. arizonicus Hopk. 5. 



6. mexicanus Hopk. 6. 



7. parallelocollis Chap. 7. 



8. approximatus Dietz. 8. 



9. monticolas Hopk. 9. 



10. ponderosse Hopk. 10. 



11. jeffreyi Hopk. 11. 



I 



o a 

 o 



Western Pine 



Beetle. 

 Southwestern Pine 



Beetle. 

 Roundheaded Pine 



Beetle. 

 Southern Pine 



Beetle. 

 Arizona Pine 



Beetle. 



Smaller Mexican 

 Pine Beetle. 



Larger Mexican 

 Pine Beetle. 



Colorado Pine 

 Beetle. 



70,81 

 70,85 

 70,87 



70,90 

 70,95 



70,97 



70,99 



70, 101 



Mountain Pine 



Beetle. 

 Black Hills Beetle 



71, 105 

 71, 109 

 Jeffrey Pine Beetle 71, 114 



12. Eastern Larch 71,117 

 Beetle. 



13. pseudoisugx Hopk. 13. Douglas Fir Beetle 71, 121 



14. piceoperda Hopk. 14. Eastern Spruce 71,126 

 Beetle. 



15. engelmanni Hopk. 15. Engelmann Spruce 71, 130 

 Beetle. 



16. fcoreaZtsHopk. 16. Alaska Spruce 72,133 

 Beetle. 



17. obems Mann. 17. Sitka Spruce Beetle 72,135 



12. simplex Lee. 



18. rufipennis Kirhy. 18. Red winged Pine 72,138 

 Beetle. 



19. murrayanse Hopk. 19. Lodgepole Pine 72, 140 

 Beetle. 



20. punctatus Lee. 



21. micans Kug. 



20. Allegheny Spruce 72,142 



Beetle. 



21. European Spruce 72,143 



Beetle. 



Position doubtful— 



22. Black Turpentine 72, 147 

 Beetle. 



23. Red Turpentine 72, 151 

 Beetle. 



157 



22. terebrans Oliv 



23. valens Lee 



24. adjunctus Blandf. 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 

 oL^^^i^?-^'"^^ number mentioned in the text and will show at a glance the position 

 fnt7> lo • kTu ^^® divisions, subdivisions, sections, subsections, aeries, and species 

 into which the genus is divided. 



