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This illustration shows the work of the destructive pine-bark beetle: a, a, a, a, characteristic forms or primary galleries; b, normal forms of larval mines; c, abnormal forms of larval mines-all slightly reduced.

Pine Beetle

This illustration shows the work of the destructive pine-bark beetle: a, a, a, a, characteristic forms…

"Pine-bark beetle whose work has made pine lumber expensive; adult." —Davison, 1906

Pine Beetle

"Pine-bark beetle whose work has made pine lumber expensive; adult." —Davison, 1906

"Pine-bark beetle whose work has made pine lumber expensive; pupa." —Davison, 1906

Pine Beetle

"Pine-bark beetle whose work has made pine lumber expensive; pupa." —Davison, 1906

"Pine-bark beetle whose work has made pine lumber expensive; larva." —Davison, 1906

Pine Beetle

"Pine-bark beetle whose work has made pine lumber expensive; larva." —Davison, 1906