24 • 



NORTHEASTERN STATES. 



INJURY BY BARK AND TWIG-BEETLES. ORDER COLEOPTERA. 

 FAMILY SCOLYTID-ffi. 



C.:;^SE lO. 



68. The Balsam Fir Cryphalus {Cri/phalasn. sp.). 



Excavates irregular, broad, elongate egg chambers to one side of the entrance bur- 

 row in the bark and surface of wood, the larval galleries radiating in all directions and 

 deeply grooved in the surface of the wood of the branches of dying and dead balsam 

 fir. Shores and islands of Parmacheene Lake and Rump Mountain, Maine. 



Exhibit: Work. 



69. The Spruce Cryphalus { Cryphalufin. sp. ). 



Ext'avates Ijroad transverse egg chambers in the bark and surface of wood; the 

 larval galleries but slightly grooved in the surface of the wood of dying and dead red 

 spruce and balsam fir. Islands and shores of Parmacheene Lake and near Portland, 

 Me. Common in bark of small dying and dead red spruce. 



Exhibit: Adult and work. 



70. The Minute Oak Bark-Beetle {Pityophthonis minutissimns Zimm.). 

 Excavates two straight transverse galleries from a central entrance burrow and 



elongate longitudinal chamber in the bark and surface of wood of branches on living, 

 dying, and felled trees, rarely in the thicker bark on the main trunk, of red oak, 

 southern Maine, and other oaks in the eastern United States. 

 Exhibit: Adult and work. 



71. The Minute Birch Bark-Beetle {Pttyophthorus n. sp.). 



Excavates galleries like that of the minute oak bark-beetle (70) in the living and 

 dying bark of branches of the paper birch. Southern Massachusetts. 

 Exhibit: Adult and work. 



72. The White Pine Twig-Beetle {Piti/ophthonis n. sp. ). 



Excavates several long, winding galleries from a central chamber in the bark; 

 deeply grooved in the surface of the wood of small dying and broken branches of 

 white pine. Camp Caribou, Maine. 



Exhibit: Adult and work. 



73. The Minute Spruce-Twig Wood-Engraver {Pityophthonis n. sp. ). 

 Excavates a large central chamber and several curved galleries in the bark and 



deeply grooved in the surface of the wood of small branches of felled red spruce. 

 Shores of Barkers Lake, Maine, and West Virginia. 

 Exhibit: Work. 



74. The Spruce Wood-Engraver {Pityophihorus cariniceps Lee). 



Excavates many short, radiating, curved galleries from a large central chambc^r in 

 the bark and surface of the woo<l of twigs and branches of dying trees and main 

 stem of young, dying red spruce. Western Maine to Morgantown, W. Va., and 

 Detroit, Mich. 



Exhibit: Adult and work. 



75. The Black Spruce Wood-Engraver (PHyophiliorus n. sp. ). 



Excavates short longitudinal galleries from the entrance burrow in the bark and 

 surface of wood of small, dying black spruce. Shores of Parniacheene Lake, north- 

 western Maine; Peakes Island, in Casco Bay, Maine, and Adirondacks, Kew York. 



Exhibit: Adult and work. 



