Opsimus quadrilineatus (Cererambycidae)

spruce limb borer


Opsimus quadrilineatus, the spruce limb borer, pinned adult specimens. Family characteristics + generic features: small brown beetle, eyes divided into two portions, sides of prothorax with backward pointing projections.


Observed wood extensively mined with grubholes.

Principal Hosts:

Sitka spruce, Douglas-fir, lodgepole pine, western hemlock and Abies species.

Economic Importance:

Usually attacks limbs, although has been reported to damage the seasoned wood of rustic homes in Oregon.

References and Links:

FC: 303.