18 



23. The "Western Five-Spined Tomicus (Tomicus confusus Lee. ). 



Excavates one to three long longitudinal galleries from a medium-sized central 

 chamber in the living bark of injured, dying, and recently felled yellow pine. 

 Mount Shasta, California, and Grants Pass, Oregon; also recorded from southern 

 California and Arizona. 



Exhibit: Adult and work. 



CASE 4. 



24. The Silver Pine Tomicus (Tomicus n. sp.). 



Excavates very long, straight, longitudinal, and transverse curved galleries from a 

 large central chamber in the bark of living, injured, dying, and recently felled moun- 

 tain or silver pine and sugar pine. Grants Pass, Oregon, and Kootenai, Idaho. 

 Common and evidently a destructive species. 



Exhibit: Adult and work. 



25. The Four-Spined Tomicus (Tomicus integer Eichh.). 



Excavates several longitudinal primary galleries from a large central chamber in 

 living bark of western yellow pine and lodgepole pine. Eastern Washington; also 

 recorded from California, Washington, and Colorado. 



Exhibit: Adult and work. 



CASE 5. 



26. The Sugar Pine Wood-Engraver (Carphoborus n. sp.). 



Excavates several long, curved, longitudinal galleries in the surface of the wood 

 from a deep central chamber in injured or dying sugar pine, yellow pine, Douglas 

 spruce, and Sitka spruce. Grants Pass, St. Helen, and Ahlers, Oregon; also middle 

 California. 



Exhibit: Adult and work. 



27. The Western Cedar Bark-Beetle (Phlceosinus punctatus Lee). 

 Excavates a single straight longitudinal or curved subtransverse gallery from a 



basal chamber in the living bark and surface of wood of injured, dying, and recently 

 felled giant arborvitse, incense cedar, and Port Orford cedar. California to northern 

 and eastern Washington and Rocky Mountain region. Common. 

 Exhibit: Adult and work. 



28. The Sitka Spruce Dolurgns (Dolurgus pumilis Mann.) . 



Excavates irregular, confused galleries in dying and dead bark of dead and felled 

 Sitka spruce. Southern and central Oregon. 

 Exhibit: Adult and work. 



CASE <3. 



29. The Redwood Bark-Beetle ( Phlceosinus sequoise Hopk.). 



Excavates a long, straight, longitudinal gallery from a basal chamber in living 

 bark of injured, declining, and recently felled redwood and giant arborvitae. Cali- 

 fornia to northern Washington. Very common in redwood. 



Exhibit: Adult and work. 



CASE 7. 



30. The Western Pine-Destroyer (Dendroctonus brevicomis Lee.) . 



Excavates long, winding galleries through the bark of living and injured western 

 yellow pine and sugar pine. Cascade and Rocky Mountain region, New Mexico to 

 British Columbia. Closely allied with the destructive pine bark-beetle of the East 

 and capable of great destruction of the largest and best timber. 



Exhibit: Adult and work. 



