Tech. Series 20, Part I, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate I. 





1. sMmW«.Hopk. 



2. ^tto/iensisHopk. 



3. barheri Hopk. 



4. sitchensis Hopk. 



5. engelmanvi Hopk. 



6. strohi Peck. 



7. approximatus\io\)k. 



8. ftchimrzi Hopk. 



o . 



o 



1. W i t c h ' s broom 32, 44 



weevil. 



2. Utah bark-weevil. 



3. Barber's weevil. 



4. Sitka spruce weevil. 



5. Engelmann sprucf 



weevil. 

 (). White pine weevil. 



32,45 

 32, 45 



33, 47 

 33, 47 



33,48 



7. Northern pine weevil. 33,49 



8. Schwarz's pine weevil. 33,50 



9. canadensis Hopk. 9. Canadian pine weevil. 34, 51 



10. vemorensis Germ. 10. Southern pine weevil. 34,51 



11. deodanr Hopk. 11. Deodar weevil. 34,52 



12. californictts Hopk. 12. California pine weevil. 34,53 



13. yosemite Hopk. 



14. wehbi Hopk. 



15. radiatie Hopk. 



16. fasciatus Lee. 



17. cOKtalKi^ Mann. 



18. fskei Hopk. 



13. Yosemite pine weevil. 34,53 



14. Webb's pine weevil. 34, 54 



15. M o n t e r e y pine 34, 55 



weevil. 



16. Douglas fir weevil. 34,56 



17. Ribbed pine weevil. 35,57 



18. Fiske's spruce weevil. .35,59 



19. ntgne Hopk. 19. Black spruce weevil. 35, 59 



20. puncticolUs B.opk. 20. Red spruce weevil. 35,60 



21. rnwraj/an.'t' Hopk. 21.Dodgepole pine 35,60 



weevil. 



22. cdloradevsis Hopk. 22. C o 1 o r a d o ba r k- 36, 60 



weevil. 



23. alasceiisis Hopk. 23. Arctic bark-weevil 36, 61 



24. rohmdatuK Lee. 24. Lake Superior l>ark- 36, 61 



weevil. 



25. hurkei Hopk. 



26. piperi Hopk. 



27. dubius Rand. 



28. fraseri Hopk. 



29. affinis Rand. 



30. cnrriei Hopk. 



25. Burke's fir weevil. 36, 62 



26. Piper's fir weevil. 36, 62 



27. Balsam fir weevil. 36, 63 



28. Fraser fir weevil. 36, 63 



29. Randall's pine weevil. 37,64 



30. Currie's bark-weevil. 37,65 



Classification of tlie Genus Pissodes, Siiowing Teclinlcal and Common 

 Names and Species Numbers. (Original.) 



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

 of any species number mentioned in the text, and will show at a glance the position 

 and relations of the divisions, subdivisions, sectioiis, subsections, series, subseries, 

 minor series, and species into which the genus is divided. 



