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Barkbeetle Injuries and the Means of Control
Structural Characters of the Barkbeetles
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3rd interspace acute Agric Alberta Anisandrus antennal club apex apical arcuate asperate Balsam Fir bark bark-beetles basal beetles British Columbia British Columbia Coast broadly rounded Canada carina caudal half cephalic characters chitinized closely punctured coarsely punctured convex declivital declivity deeply Dendroctonus disc discal interspaces distinct distinctly Distribution.—Eastern Douglas Fir Dryocoetes Eccoptogaster egg-tunnels eggs Eichh elevated elongate elytra elytral declivity elytral interspaces elytral striae epistomal process feebly female finely punctured flattened front margin Genus hairs Hopk Host Hylastes Hylurgops impressed interstrial punctures labium larvae length Leperisinus longer than wide male Mannh moderately narrowed nearly numbers oblique Pityogenes Pityophthorus pronotal pronotum pubescence rugose scutellum segment serrate shining sides Sitka Spruce slender slightly sparsely species specimens sternite stout strial punctures strongly sulcate sutural striae suture teeth tibiae Tomicus transverse trees Trypodendron tunnels uniseriately usually Western Western White Pine White Pine white spruce Xyleborus Yellow Pine