Beetle Damage
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This illustration shows a tree that has been damaged by a sprice-destroying beetle. a, primary gallery; b, borings packed in side; e, entrance and central burrow through the packed borings; d, larval mines-note how the eggs are grouped on the sides.
Galleries
Trees: BSource
Yearbook of the United States Department of Agriculture (Washington: Government Printing Office, 1903) 268
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