Small Beetles on Clothing: Sawtoothed Grain Beetles, Not Clothing Pests

The insect in the photo is a sawtoothed grain beetle (Oryzaephilus surinamensis) or a close relative (merchant grain beetle). They are 2.5–3 mm, brown, flattened, with six saw-like teeth on each side of the thorax.

Key Facts

• Larvae develop in whole or processed grains (flour, cereal, pasta, rice, nuts, dried fruit, pet food).
• They do not damage fabrics, wool, or clothing—they're only on the shirt by accident.
• Adults are strong fliers and disperse from the infestation source.

Action Plan

1. Inspect all dry food storage near where the beetles were found.
2. Check "bean bag" fill, decorative corn, birdseed, pet food.
3. Discard infested items. Freeze borderline items 4 days at 0°F.
4. Vacuum cracks and shelves. Store kept goods in airtight containers.

No insecticide needed. They're a nuisance, not a health or property threat. Elimination of the breeding source stops them.