2 
13. The Monterey Pine Twig-Beetle - 
Pityophthorus puncticollis Lee. 
Excavates small, radiating, curved galleries from a large central cnamber in twigs 
and branches of dying and felled Monterey pine, shore pine, western yellow pine, 
knobeone pine, Sitka spruce, and mountain or silver pine. Miudle California to 
northern Washington. : 
Exaursir: Adult and work. 
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, silver pine, shore pine, and Douglas spruce. California to 
Alaska, coast and Cascade region. Common. 
Exursir: 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. 
Exursir: Adult and work. 
16. The Smaller Fir Bark-Beetle. 
Pityophthorus n. sp. 
Excavates transverse galleries from a central chamber in the bar« of dying lowland 
fir and mountain or silver pine. Kootenai, Idaho. 
Exnuisit: Adult and work. 
CAS HS. 
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 lowland fir. Kootenai, Idaho. 
Exarsir: Adult and work. 
18. The Yellow Pine Wood-Engraver 
Pityogenes carinulatus Lec. 
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. 
Exnursit: Adult and work. 
19. The Western Fir Bark-Beetle. 
Tomicus n. sp. : 
Iexeavates several radiating, curved, transverse galleries from a small central 
chamber in the bark and surface of wood of injured, declining, or dying lowland fir, 
and white fir. Mount Shasta, California, and Moscow Mountains, Idaho. Common. 
Exuisit: Adult and work. 
20. The Smaller Sugar Pine Tomicus. 
Tomicus latidens Lee. 
Excavates two or three longitudinal galleries irom a small central chamber in liv- 
ing bark of branches of dying and recently felled sugar pine. Grants Pass, Oregon; 
also California to Colorado. 
Exuisir: Adult and work. 
