42 MISCELLANEOUS FOEEST INSECTS. 



Pissodes Hosts, etc. 



species 

 numbers. 



18. Picea nibens and Picea mariana. Dyinsj (?) thick hark on lugs, stunip.s, and trunks 



of small standing trees. 



19. Picea mariana. Dying bark on trunk of small tree. 



20. Picea rubens. Dying bark on felled and standing trees. 



21. Pinus contorta (murrayana) . Thin bark on standing tree. 



22. Picea canadensis and Picea engelmanni? Dying thick bark on base of standing 



trees. 

 2^. Picea. Thick bark on living trees. (Brunner's notes.) 



24. Probably in Picea rubens? and Picea canadensis? (Not observed.) 



25. Abies lasiocarpa and Abies concolor? Living thick bark on trunks and l)aso of 



living and dying trees. Injinious. 



26. Abies lasiocarpa and Abies concolor. Living and dying thick bark on living and 



dying trees. 



27. Abies balsamea. Living and dying bark on trunks of living and dying trees and 



snags of storm-broken trees; also in trunks of felled trees. 



28. Abies fraseri. Living and dying bark on trunks of living and dying trees. 



29. Pinus strobus. Thick bark on stump. 



30. Host not observed; probably pine. 



TABLE OF HOST TREES. 

 Tree species. Pissodes spe- 



(Britton classification, 1908.) Common name. cies number 



Pinus strobus White pine 6, 7, 29. 



lambertiana Sugar pine 13. 



strobi/ormis Mexican white pine 14. 



resinosa Red pine 7. 



ponderosa Western yellow pine 8, 12, 13. 



scopulorum Rock pine 8, 14. 



murrayana Lodgepole pine 14, 2 L 



palu^tris Longleaf pine 10. 



rigida Pitch pine 6, 7. 



echinata Shortleaf pine 7, 10. 



tseda Loblolly pine 10. 



radiata Monterey pine 15. 



banksiana (divaricata) Gray pine 6. 



virginiana Virginia or scrub pine 7,10. 



pungens Table mountain pine 7 . 



sylvestris (introduced) Silver pine 15. 



Picea canadensis White spruce 22, 24?. 



rubens Red spruce ' 6, 18, 20. 



mariana Black spruce 19. 



excelsa (introduced) Norway spruce 6. 



engelmanni Engelmann spruce 5, 22?, 23. 



sitchensis Sitka spruce 3?, 4, 17. 



Pseudotsuga mucronata (taxifolia) Douglas spruce 16. 



Abies balsamea Balsam fir 1, 27. 



fraseri Eraser's balsam fir 1, 28. 



lasiocarpa "WTiite fir 25, 26. 



concolor Silver fir 25?, 26?. 



Cedrus deodara (introduced) Deodar cedar 11. 



