19 



CASK Q. 



31. The Dark-Red Turpentine-Beetle {Demlroctonm rnlnm Ix>c.). 



Tin- lat>,'('st Xnrtli Aiin'iicaii l):irk-l)('t'f Ic. Excavates very broa<l and long primary 

 ^'alleries, the lirootlsdevelopiii;: in Itroad nide eliainhers in the l)ark of living:, injured, 

 dyinjr, an<l recently felled yellow pine, iodfrepole pine, an<l doid)tless most of the 

 other western pines. California t<i Kritish Columl)ia and eastward to Kansas and 

 northern Michijran. A variety e.xtends into the eastern United States. Common 

 and injurious, but not neee.ssarily destructive to livin;!; timber. 



KxiriBiT: Adult and work. 



32. The Mountain Pine Dendroctonus ( Demhoctonns n. sp. ). 



A medium-size<l black bark-beetle, excavating very long, winding galleries in the 

 bark of living, injured or declining, and recently felled mountain or silver pine and 

 sugar pine. Northern California to Washington ea.stward to Idaho and Montana. 

 Very common and capable of great destruction of the best timber. 



Exhibit: Adult and work. 



CASES n AND lO. 



33. The Doug-las Spruce Dendroctonus ( Dfndroctoims n. sp. ). (Dendroctonus 



siutilis in Division of Entomology, Bui. 21, n. s. ). 

 A large, reddish bark-beetle, excavating long longitudinal, slightly curved primary 

 galleries in the bark of living, injured, and recently felled Douglas spruce and west- 

 ern larch. New Mexico to British Columbia, Pacific coast and eastward througli the 

 mountain regions. Very common and capable of destroying much valuable timber. 

 Exhibit: Adult and work. 



CASE lO. 



34. The "Western Pine Hylurgops {Hylurgops mibcostukiius Mann.). 

 Excavates short, slightly curved, longitudinal galleries in the living bark of 



injured, dying, and recently felled sugar pine, western white pine, western yellow 

 pine, lodgepole pine, and probably other pines on the Pacific coast. Cascade and 

 l\ocky Mountain region. Common. 

 Exhibit: Adult and work. 



35. The Sitka Spruce Hylurgops { Tfi/Iurgnps riigipmnis Mann.). 



Excavates a short, curved, longitudinal and subtransver.^^e gallery from an entrance 

 in the living l)arkof injured, dying, and recently felled Sitka spruce and shore pine. 

 Coast region, California to Washington and Alaska. 



Exhibit: Adult and work. 



CASE 11. 



36. The Fir Wood-Engraver {Ifi/lesinm n. sp. ). 



I'^xcavates a small central chamber 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 larva' also groove or engrave the surface of the wo<id in an ornamental 

 manner. Infe.«its thegran<l firand Df)Ugias spruce. Port Williams and Port Angeles, 

 Wash. Common. 



Exiiihit: Adult and work. 



37. The Larger Fir-Tree Bark-Beetle ( Jli/lisiun.t ifrnnulotiis Lee ). 

 Excavates one or two transverse galleries from a centnd burrow in the bark an<I 



surfa<"e of woo<l near the ba.«e of dying grand fir. Port Williams, Wash.; also 

 recorded from California. 

 Exhibit: Adult and work. 



