17 



14. The Sitka Spruce Twigf-Beetle ( Pili/ojihthnnis uitidulus Mann.). 

 Kxcavatcs tlirccm- four ra«liatliij; <rallnrie.s from a niediuni-sizcd ci-iitral chamber in 



l)ark of Sitka spriuv, mountain pine, shore pine, and Douglas spruce. CaHfomia to 

 Alaska, coast and Ca.«cade region. Common. 

 Exhibit: Adult ami work. 



15. The Jeffrey Pine Twig-Beetle {Pili/ophthorits n. sp. ). 



Excavates small central chaiiil)ers ami lonfj; longitudinal galleries in living bark of 

 t\vig.s and branches on living, injured, dying, and recently felled Jeffrey pine and 

 western yelU)w pine. Mount Shasta. California, to Albany, Greg., and Moscow 

 Mountains, Idaho. 



Kxuihit: Adult and work. 



16. The Smaller Fir Bark-Beetle { IHtj/ophthorns n. sp. ). 



Excavates transverse galleries from a central chamber in the bark of dying grand 

 lir and mountain or silver pine. Kootenai, Idaho. 

 E.xniBiT: Adult and work. 



C^VRE 3. 



17. The Mountain Pine Wood-Engraver [Pityogene-'^ n. sp. ). 



Excavates large central chambers and numerous curved primary galleries in the 

 bark and surface of wood of injured, dying, and recently felled mountain or silver 

 pine and grand lir. Kootenai, Idaho. 



ExniHir: .Vdult and wnrk. 



18. The Yellow Pine Wood-Engraver {Plti/ogenes carinuhttui^ Lee). 

 Excavates numerous radiating galleries from a large central chamber in living bark 



and surface of wood of injured, dying, and recently felled western yellow pine and 

 .Jeffrey pine. California to eastern Washington, western Idaho, and Colorado. 

 Exhihit: Adult and work. 



19. The Western Fir Bark-Beetle ( Toimais n. sp. ). 



Excavates several radiating, curved, transverse galleries from a small central 

 chamber in the bark and surface of wood of injured, declining, or dying grand fir, 

 California white fir. Mount Shasta, California, and Moscow Mountains, Idaho. 

 Common. 



Exhibit: .\dult and work. 



20. The Smaller Sugar Pine Tomicus [Tomicus loiidenn Lee). 



Excavates two or three longituilinal galleries from a small central chamber in living 

 bark of branches of dying and recently felled sugar pine. Grants Pass, Oregon; 

 also California to Colorado. 



Exuihit: Adult and work. 



21. The Sitka Spruce Tomicus ( Tomicus concinniiK Mann.). 



Excavates irregular central chambers, and three or four short curve<l galleries, in 

 partly living bark of injured, dying, and recently felled Monterey pine, shore pine, 

 and Sitka spruce. Coast region, middle California to .\la.ska. 



Exhibit: Adult and work. 



22. The Oregon Tomicus (Toiniriijt orrrfovi Eichh.). 



Ivxcavates two or three longitudinal galleries from a small central chaml)er in the 

 bark of living, injured, dying, and recently felled western yellow pine, lodgepole 

 pine, silver pine, and probably other jiines in the Northwe.st. Destructive to the 

 western yellow pine in western Idaho. 



Exhibit: Adult and work. 



28235— No, 48— (>4 •_' 



