80 
70. The Minute Oak Bark-Beetle. 
Pityophthorus minutissimus Zimm. 
Excayates 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. 
Exuisir: Adult and work. 
71. The Minute Birch Bark-Beetle. 
Pityophthorus 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. 
Exursir: Adult and work. 
72. The White Pine Twig-Beetle. 
Pityophthorus 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. 
Exuisit: Adult and work. 
73. The Minute Spruce-Twig Wood-Engraver. 
Pityophthorus 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. 
Exuisit: Work. 
74. The Spruce Wood-Engraver. 
Pityophthorus cariniceps Lec. 
Excavates many short, radiating, curved galleries from a large central chamber in 
the bark and surface of the wood of twigs and branches of dying trees and main stem 
of young dying red spruce. Western Maine to Morgantown, W. Va., and Detroit, 
Mich. 
Exursit: Adult and work. 
75. The Black Spruce Wood-Engraver. 
Pityophthorus n. sp. 
Excavates short longitudinal galleries from the entrance burrow in the bark and 
surface of wood of small dying black spruce. Shores of Parmacheene Lake, north- 
western Maine; Peakes Island, in Casco Bay, Maine, and Adirondacks, New York. 
Exuisit: Adult and work. 
76. The White Pine Wood-Engraver. 
Pityogenes n. sp. 
Excavates numerous short, radiating, curved egg galleries from a large central 
chamber in the bark and surface of wood of large and small branches and small 
dying white pine. Northern Maine to West Virginia. Common. Heretofore rec- 
ognized as Pityophthorus sparsus Lec. 
Exuisir: Adult and work. 
CASH, 20: 
77. The Small Red Spruce Bark-Beetle. 
Dryccetes n. sp. 
Excavates three or four short, curved galleries from a small central cavity in the 
bark and surface of the wood of injured, ‘dying, and recently felled red, white, and 
black spruce, Maine to northern New York, and the red spruce in the mountains of 
West Virginia. Common. 
EXxuIsit: Adult and work. 
