21 



CASE 13. 



47. The California White Fir Scolytus (Scolytus prseceps Lee). 



Excavates two, nearly straight, transverse galleries from a central entrance burrow 

 and basal cavity in living bark and surface of wood of California white fir. Mount 

 Shasta, California, and grand fir, Sand Point, Idaho. Closely allied in character and 

 habits to Xo. 48. 



Exhibit: Adult and work. 



48. The Fir Tree Destroyer (Scolytus subscriber Lee). 



Excavates two long, nearly straight, transverse galleries from a central entrance 

 burrow and central or side cavity, in bark of living, injured, and declining grand fir, 

 California white fir, and doubtless other species of fir. California to British Colum- 

 bia, eastern Washington, and western and northern Idaho. The healed-over wounds 

 in living trees cause serious defects and rapid decay of the heartwood. 



Exhibit: Adult and work. 



BARK AND WOOD-BORING GRUBS. ORDER COLEOPTERA, FAMI- 

 LIES BUPRESTIDiE AND CERAMBYCHXffi. 



CASE 14, AjSTD PJ^JEIT OF CASE 15. 



49. The Douglas Spruce Bark-Borer {Asemum nitidum Lee). 



A round-headed, bark-boring grub, boring transverse and winding galleries in the 

 bark of living, injured, and declining Douglas spruce and hemlock. Cascade Moun- 

 tains, near Detroit, Oreg., St. Helen, Oreg., and Port AYilliams, Wash. A very com- 

 mon and destructive enemy of the Douglas spruce. The healed-over wounds in the 

 wood cause serious defects, and the trees die from successive attacks. 



Exhibit: Adult and work. 



50. The White-Pine Sawyer (Monohammus scuteUatus Say.). 



A large, whitish round-headed, bark and wood-boring grub, excavating burrows 

 through the sapwood and deep into the heartwood of fire-scorched, declining, dying, 

 dead, and recently felled mountain or silver pine. Kootenai, Idaho, and white pine 

 in eastern and northern LTnited States. Common and destructive. 



Exhibit: Adult and work. 



51. The Ponderous Sawyer (Ergates spiculatus Lee). 



An exceedingly large, round-headed, bark and wood-boring grub, excavating large 

 and deep burrows in the sapwood and heartwood of dead and felled western vellow 

 pine; destructive to the wood of timber that has been dead or felled one or more 

 years. Southern Oregon. 



Exhibit: Adult and work. 



52. The Western Cedar Bark-Borer (Hylotrupes amethystinus Lee). 



A medium-sized bark and wood-boring grub, excavating long, winding burrows in 

 the living bark and surface of the wood and boring into the sapwood of injured, 

 dying, and recently felled giant arbor vitse and incense cedar. Northern California 

 to Washington. 



Exhibit: Work. 



53. The Bronze Birch-Borer (Agrilus anxius Gory). 



A long, flat-headed, slender, wood-boring grub, excavating long, winding burrows 

 in the bark and surface of the wood of living and injured birch and poplar trees in 

 northern Idaho, northern Maine, and mountains of West Virginia; also recorded 

 from northern Michigan, New York, Pennsylvania, Virginia, Quebec, and Ontario. 

 A destructive enemy of the birches and poplar. 



Exhibit: Adult and work. 



