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Beetle? #944418

Asked September 07, 2026, 11:23 AM EDT

Do you know what this bug is? I recently moved into a new-build house in a development that is doing on-going construction. I am seeing these beetles everywhere inside my house; several a day. Any suggestions on how to control them?

Washington County Minnesota

Expert Response

Thank you for reaching out.

That is a fulvous harp ground beetle.  It is a beneficial insect for plants as it preys on aphids and caterpillars.  Here’s how you can deal with them:

Prevention and Exclusion

Seal cracks: Caulk gaps around doors, windows, and foundation penetrations using exterior sealant.

Modify lighting: Switch bright white exterior lights to yellow bug bulbs, as white light attracts them at night.

Clear borders: Create a clean perimeter by removing heavy mulch, leaves, and dense vegetation directly against the house foundation. [1, 2]

Indoor and Outdoor Treatments

Diatomaceous earth: Sprinkle along baseboards, entryways, and window sills to dehydrate wandering bugs.  

Barrier sprays: Apply a residual outdoor perimeter insecticide or a professional along the foundation and thresholds.

Vacuum: Remove indoor stragglers quickly using a vacuum cleaner or broom.

If you decide to use the pesticides, be sure to read and follow all label instructions.

I hope this helps!


Deb Kroon Replied September 07, 2026, 3:19 PM EDT

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