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General Description14-24 mm, integument reddish brown, abdomen black, hairs gray or brown. Antennae extending 5 segments past elytra in males and 3 segments past in females. Small round lateral projections on pronotum. Scutellum v-shaped with white hairs on sides. The subspecies Monochamus o. obtusus is distinguished by darker integument and hairs with reduced gray hairs. Monochamus o. fulvomaculatus has light brown integument with numerous gray hairs (Linsley and Chemsak, 1984).