76 



44. The Single Spine Scolytus. 



Scobjtvs ■imi)>p'mosus Lei'. 



Excavates two short, straight, longitudinal galleries from an entrance burrow in 

 living bark of injured, ilying, and recently felled Douglas spruce and western larch. 

 Pacific coast, Cascade and Rocky Mountain region. Common. 



Exhibit: Adult and work. 



45. The Fir-Branch Scolytus. 



Scolytus n. sp. 



Excavates two short, longitudinal galleries from a central burrow and side cavity 

 in living ])ark of the l)ranches of recently felled lowland fir. Cs^scade Mountains 

 near (irants Pass, Oregon. 



Exhibit: Work. 



46. The Smaller Fir-Tree Scolytus. 



Scolt/htf! n. sp. 



Excavates two transverse or oblique, slightly i-urved galleries from a central 

 entrance burrow and side cavity in the bark and surface of wood of injured and 

 dying lowland tir. Kootenai, Idaho. 



Exhibit: Adult and work. 



c^^sk; 13. 

 47. The California White Fir Scolytus. 



>Scol!itu!< pruTcps Lee. 



Excavates two nearly straight, transverse galleries from a central entrance l:)urrow 

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

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

 and habits to No. 48. 



Exhibit: Adult and work. 



48. The Fir Tree Destroyer. 



Scolytus subscaher 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 lowland 

 fir, white tir, and doubtless other species of fir. California to British Columbia, east- 

 ern 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 BUPRESTID-ffi AND CERAMBYCID^ffi. 



CASM 11 ^ISTD P^na^ Oin C^t-^K 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 western hemlock. Cascade 

 Mountains, near l)etroit, Oreg., St. Ilelen, Oreg., and Port Williams, Wash. A very 

 common and destructive enemy of the Douglas spruce. The healed-over wiiunds in 

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



Exhibit: Atlult and work. 



50. The White-Pine Sawyer. 



MonoJiammus scutcllutus Say. 



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

 through the sajjwood and deep into the heartwood of tire-scorched, declining, dying, 

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

 in eastern and northern United States. Common and destructive. 



Exhibit: Adult and work. 



