75 



CASE 11. 

 36. The Fir Wood-Engraver. 



Hijlesinus n. sp. 



Excavates a small central chainl)er at one side of the junction of two short trans- 

 verse, slightly curved egg galleries, which are deeply grooved in the surface of the 

 wood; the larvte also groove or engrave the surface of the wood in an ornamental 

 manner. Infests the lowland fir and Douglas spruce. Port Williams and Port 

 Angeles, Wash. Common. 



Exhibit: Adult and work. 



37. The Larger Fir-Tree Bark-Beetle. 



HylesinuK granulat.u^ Lee. 



Excavates one or two transverse galleries from a central hurrow in the bark and 

 surface of wood near the base of dying lowland fir. Port Williams, Wash.; aiso^ 

 recorded from California. 



Exhibit: Adult an<l work. 



38. The Grand Fir Bark-Beetle. 



Iftjlesimix n. sp. 



Excavates two separate, transverse galleries from a central entrance burrow in the 

 bark and surface of wood of recently felled lowland, or grand, fir. Port Angeles and 

 Port Williams, Wash. 



Exhibit: Work. 



39. The Shore Pine Hylesinus. 



Hyleshms sericexis Mann. 



Excavates one short, longitudinal gallery from the entrance burrow and small side 

 cavity in living bark of injured, dying, and recently felled shore pine. Newport and 

 Seaside, Oreg. Common. Also recorded from California and Alaska. 



Exhibit: Adult and work. 



40. The Ash-Tree Bark-Beetle. 



IfyU'-^lini>i acnli'ittit.t Say. 



Excavates two long, transverse galleries, from a central entrance burrow and side 

 cavity in the living bark of injured, dying, and recently felled ash. Atlantic to 

 Pacific coast. Common. Specimens from Oregon ash, St. Helen, Oreg. 



Exhibit: Adult and work. 



41. The White- Alder Bark-Beetle. 



Hylesinus aspericoUis Lee. 



Excavates a moderately long, longitudinal gallery from a basal entrance burrow 

 in the bark of living, injured, dying, and recently felled white alder. Newjiort, 

 Detroit, and Astoria, Oreg., and Seattle, Wash.; also recorded from California. A 

 destructive enemy, causing the death of large trees. 



Exhibit: Adult and work. 



42. The Western Hemlock Bark-Beetle. 



Hylesinus n. sp. 



Excavates one or two transverse galleries from a central burrow in bark and sur- 

 face of wood of living, injured, and recently felled western hemlock, causing "gum 

 spot" defects in the wood of living trees, and may cause the death of the Ijest tim- 

 ber. Newport, Oreg., and Port Angeles, Wash. 



Exhibit: Adult and work. 



CASE IS. 



43. The Douglas Spruce Hylesinus. 



Hyh'sitiiis iiebKlnsHs Lee. 



Excavates two short, straight, longitudinal galleries from a central entrance burrow 

 in the living bark of injured, dying, and recently felled Douglas spruce. California 

 to British Columbia, and eastward to Idaho and Colorado. Very common. 



Exhibit: Adult and work. 



