X MISCELLANEOUS FOREST INSECTS. 



Page. 

 Plate XXI. DLstribution maps of Pissodes. Fig. 17. — P. costalus. Fig. 

 18. — P.fishei. Fig. 19. — P.nigrse. Fig. 20. — P.puncticoUis. 

 Fig. 21. — P. murrayanse. Fig. 22. — P. coloradensis , Fig. 



23. — P. alascensis. Fig. 24. — P. rotundatus 68 



XXII. Distribution maps of Pissorfcs. Fig. 25. — P.burkei. Fig. 26. — 

 P. piperi. Fig. 27. — P. dubius. Fig. 28. — P.fraseri. Fig. 

 29.— P. affinis. Fig. 30.— P. curriei 68 



TEXT FIGURES. 



Fig. 1. Pissodes strobi: Head, ventral aspect, and mouth parts ^. 13 



2. Pissodes strobi: Head, dorsal aspect, and mandibles 14 



3. Dendroctonus valens: Head, dorsal and lateral aspects 15 



4. Dendroctonus valens: Head, ventral aspect, and mouth parts 16 



5. Pissodes sitchensis: Head of larva, dorsal aspect 23 



6. Pissodes sitchensis: Head of larva, ventral aspect 24 



7. Pissodes sitchensis: Head of larva, lateral aspect 25 



8. A. Pissodes piperi: Front of head of larva 26 



B. Pissodes nemorensis: Front of head of larva 26 



9. Pissodes fraseri: Lateral aspect, showing method of determining indi- 



vidual index 28 



