Ivory Marked Beetle

Subject: suspicious bug
Location: western pennsylvania
August 10, 2016 8:14 pm
The other day i was in this shower and this guy decided to join me. He was about 2 inches big. And when i tried to move him out of the window he squealed at me, literally. I was only wandering if you could tell me what he is? Is he harmful?
Signature: Tristyn Gravatt

Ivory Marked Beetle
Ivory Marked Beetle

Dear Tristyn,
This is an Ivory Marked Beetle, a member of the wood boring beetle family Cerambycidae.  They do have powerful mandibles that could nip at you, but they have no venom or poison, so they are no threat to humans.  According to BugGuide:  “hosts include a wide variety of hardwoods (oak, ash, hickory, locust, chestnut, maple, elm, beech, cherry); larvae bore in heartwood”
but we believe they are never plentiful enough to be a threat to healthy trees.

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