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Extension > Garden > Diagnose a problem > What insect is this? > Insects found indoors > Beetles, bugs, ants, and other insects without obvious wings - Larger than 1/2 inch long > Longhorned borer, Sarosethes fulminans

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Longhorned borer

Sarosethes fulminans

Longhorned borer, Sarosethes fulminans

Jeff Hahn, University of Minnesota Extension


Description: 3/4 - 1 inch long.

Where/When: Most commonly found indoors during winter, but can be found at other times of the year.

Significance: Is associated with oak wood. Can be brought indoors in firewood or lumber in construction projects. Is harmless to people. Can cause cosmetic damage to wood from which it emerges, but fortunately it does not re-infest wood.

More information on Longhorned borers

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