If a homeowner finds a wood-boring beetle specimen measuring only $1/4$ inch long, is it likely an adult Old House Borer?

Answer

No, it suggests a smaller pest like a powderpost beetle

Adult Old House Borers start at $1/2$ inch, whereas powderpost beetles rarely exceed $1/4$ inch in length, making the smaller size a key differentiator.

If a homeowner finds a wood-boring beetle specimen measuring only $1/4$ inch long, is it likely an adult Old House Borer?
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