25 



76. The White Pine Wood-Engraver {I'ltifot/mrn ii. sp. ). 



I'.xcavatcs iiuiiH'roiis short, ladiatiii;^, curved v<m pilk'ries from a hirfrc central 

 (•liaMilicr ill the hark and surfaie of wood of lar^'c and Hiiiall l>raiiclu'>i and .small, 

 dyini; w lut«' |)iMc. Northern Maine to We.st Virginia. Comuiun. Heretofore ree- 

 ojrnized a.s J'ih/ii/ihlhorns njxtrsnx Lee. 



Kxniurr: Adult and work. 



C^SE 20. 



77. The Small Red Spruce Bark-Beetle { Dn/ocaie.t n. sp. ). 



Excavates three or four short, riirved <4aileries from a small central cavity in the 

 bark and surface of the wood of injured, dyin<,', and recently felled red, white, and 

 black spruce, Maine to northern New York, and tlie red spruce in the mountains of 

 West Virginia. C'onunon. 



Exhihit: Adult and work. 



78. The American Spruce Bark-Beetle {Dnjoccctes n. sp. ). 



Excavates short, irregular galleries in the living bark of injured, dying, and recently 

 felled red, white, and black spruce in Maine, spruce and pine in West Virginia; 

 al.so in spruce and pine in Europe. Widely distributed in Eurojjeand eastern North 

 America. 



Exhibit: Adult and work. 



79. The Birch Bark-Beetle {Dniocnrtef^ n. sp.). 



Excavates irregular galleries in the bark of living, injured, and dying birch. North- 

 western Maine and mountains of West Virginia. Common. Under favoraljle condi- 

 tions causes tlie death of large trees. 



Exhibit: Adult and work. 



80. The Balsam Fir Bark-Beetle (Tomirus halmyneusi Lee). 



Excavates several radiating, carved, transverse galleries from a small central cham- 

 ber in the living and dying bark of injured and dying balsam fir and red and black 

 sjjruce. Western Maine; also recorded from northern Michigan and New York. 



Exhibit: Adult and work. 



81. The White Spruce Bark-Beetle (Toniicuj^ n. sp. ). 



Excavates several long, radiating, longitudinal egg galleries from a large central 

 chandx'r in the living bark of recently felled white spruce. Near Camp Caribou, 

 northwestern Maine. 



Exhibit: .\dult and work. 



82. The Hudson Bay Tomicus ( Tominis n. sp. ). 



Excavates one or two longitudinal primary galleries from a central Inirrow ami 

 small central chand)ers in the living bark of recently felled white and red spruce. 

 Northwestern Maine; also recorded from Canada and British Columbia. 



Exhibit: Adult and work. 



83. The Spruce Bark-Beetle ( I'nhigrnphus ntfipennia Kirby). 



Excavates tliree or four short, curve<l egg galleries from a large central chaml>er in 

 the surface of the inner bark, through the bark and slightly grooving the surface of 

 the wood of injured, declining, dying, and recently felled black, red, and white 

 spruce, and rare in balsam fir. Very common throughout the northern and Ai)pa- 

 lachian spruce regions. 



Exhihit: .\dulf and work. 



84. The Cedar Bark-Beetle { Phhrosinus drutatiis Lee). 



Excavates a single short longitudinal egg gallery from the entrance burrow and 

 ba.sal chamlK'rs, in the bark and surface of wo<h1 of injured and dying junii)er and 

 eastern arborvitje. f^'itern and northwestern Unite<l States and Canada. Couunon. 



Exuibit: Adult and work. 



