Which species is a Saw-Toothed Grain Beetle?

• A. Saw-Toothed Grain Beetle
• B. Rice Weevil
• C. Paper Wasp
• D. Robber Fly

Answer: (A)

The main idea here is recognizing the specific beetle that is known as the Saw-Toothed Grain Beetle by its distinctive appearance and typical habitat. This species is a tiny, flattened brown beetle that infests stored foods. What makes it stand out is the pronotum (the shield behind the head) having a row of tooth-like projections along its sides, giving a clear “saw-toothed” look. That signature feature is what identifies it as the Saw-Toothed Grain Beetle.

The other options don’t fit that identification. The Rice Weevil is also a stored-product pest, but it has a noticeable long snout (rostrum) and different markings on the wing covers, not the saw-like lateral teeth. The Paper Wasp and the Robber Fly are not beetles and have very different body shapes and wing structures, so they wouldn’t be confused with a grain beetle based on morphology.

So, the beetle with the saw-like margins on its thorax, specifically linked to stored-grain habitats, is the correct choice.