Which species is a Saw-Toothed Grain Beetle?

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

Answer: (A)

Identifying a Saw-Toothed Grain Beetle comes from recognizing a distinctive feature and its usual habitat. This beetle is a small, flat, brown stored-product pest, and its name describes a key trait: serrations along the edges of the prothorax that give a saw-like appearance. That unique prothorax margin is what sets it apart from other insects listed. The paper wasp is a winged social insect, the rice weevil is another stored-product beetle but with a long snout and different markings, and the robber fly is a predatory fly. So the species that matches the common name Saw-Toothed Grain Beetle is Oryzaephilus surinamensis.