72 



13. The Monterey Pine Twig-Beetle 



I'Hyopldhorux punctlcollis Lee. 



Excavates small, radiating, curved galleries from a large central cnamber in twigs 

 iiid branches of dying and felled Monterey pine, shore pine, western yellow ]iine, 

 knobcone pine, Ritka spruce, and mountain or silver pine. Miudle California to 

 northern Wasiiington. 



ExHiBrr: Adult and work. 



14. The Sitka Spruce Twig--Beetle. 



Pitijopliilionts nitidulKs Mann. 



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

 in l)ark of Sitka spruce, silver pine, shore pine, and Douglas spruce. California to 

 Alaska, coast and Cascade region. Common. 



Exhibit: Adult and work. 



15. The Jeffrey Pine Twig-Beetle. 



Pil!/()j)]illi(/ruif n. sp. 



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

 twigs and liranches 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. 



I'ltyophllioruH n. s|). 



P^xcavates transverse galleries from a central chamber in thebarKof dying lowland 

 fir and mountain or silver pine. Kootenai, Idaho. 

 Exhibit: Adult and work. 



CASK ;i. 

 17. The Mountain Pine Wood-Engraver. 



Pilnognii's n. sp. 



Excavates large central chambers and numerous curved primary galleries in the 

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

 pine and lowland tir. Kootenai, Idaiio. 



P]xhibit: Adult and work. 



18. The Yellow Pine Wood-Engraver 



J'itj/o(/enes carinulalua 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. 



P^xhibit: Adult and work. 



19. The Western Fir Bark-Beetle. 



Tomlrus 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 lowland lir, 

 and white tir. Mount Shasta, California, and 3iloscow Mountains, Idaho. Common. 



Exhibit: Adult and work. 



20. The Smaller Sugar Pine Tomicus. 



TiDnh'us lalidnia Lee. 



l'>xcavates two or three longitudinal galleries from a small central chamber in liv- 

 ing bark of liranches of dying and recently felled sugar pine, tirants Pass, Oregon; 

 also California to Colorado. 



Exhibit: Adult and work. 



