Phloeosinus spp. (Scolytidae)

cedar bark beetle


Phloeosinus spp., cedar bark beetle, adult beetle. Reddish-brown, often shiny, 2.4 mm long.


Phloeosinus spp., cedar bark beetle, galleries. Typical scolytid larvae.


Damage to twig caused by Phloeosinus spp. feeding. Usually only attack weakened, dying or felled trees. Newly emerged adults may feed on twigs of healthy trees, hollowing them out and killing them, prior to constructing egg galleries.

Principal Hosts:

Cedars (Thuja) are attacked by almost no other bark beetles, so any species found working on the inner bark of cedar-like trees (not Cedrus) is almost certain to be a species of Phloeosinus.

Economic Importance:

As a general rule these beetles are not aggressive in their attack. Occasionally, however, they become sufficiently numerous and aggressive to attack and kill apparently healthy trees.

References and Links:

FC: 366, 367.

See HForest.