17 



14. The Sitka Spruce Twig-Beetle (Pityophthorus nitidulus Mann.). 

 Excavates three or four radiating galleries from a medium-sized central chamber in 



bark of Sitka spruce, mountain pine, shore pine, and Douglas spruce. California to 

 Alaska, coast and Cascade region. Common. 

 Exhibit: Adult and work. 



15. The Jeffrey Pine Twig-Beetle (Pityophthorus n. sp.). 



Excavates small central chambers and long longitudinal galleries in living bark of 

 twigs and branches on living, injured, dying, and recently felled Jeffrey pine and 

 western yellow pine. Mount Shasta, California, to Albany, Oreg., and Moscow 

 Mountains, Idaho. 



Exhibit: Adult and work. 



16. The Smaller Fir Bark-Beetle (Pityophthorus n. sp.). 



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

 fir and mountain or silver pine. Kootenai, Idaho. 

 Exhibit: Adult and work. 



CASE 3. 



17. The Mountain Pine "Wood-Engraver (Pityogenes 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 fir. Kootenai, Idaho. 



Exhibit: Adult and work. 



18. The Yellow Pine "Wood-Engraver (Pityogenes carinulatus 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. 

 Exhibit: Adult and work. 



19. The "Western Fir Bark-Beetle (Tomicus 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: Adult and work. 



20. The Smaller Sugar Pine Tomicus (Tomicus latidens Lee). 



Excavates two or three longitudinal 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. 



Exhibit: Adult and work. 



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



Excavates irregular central chambers, and three or four short curved galleries, in 

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

 and Sitka spruce. Coast region, middle California to Alaska. 



Exhibit: Adult and work. 



22. The Oregon Tomicus (Tomicus oregoni Eichh.). 



Excavates two or three longitudinal galleries from a small central chamber in the 

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

 pine, silver pine, and probably other pines in the Northwest. Destructive to the 

 western yellow pine in western Idaho. 



Exhibit: Adult and work. 



28235— No. 48—04 2 



