The indianmeal moth was given its name after an insect scientist found it feeding on corn meal, also known as Indian meal. From wing tip to wing tip, adult moths measure from five-eighths of an inch to three-fourths of an inch long.
Merchant grain beetles are typically not found in grain products, but instead like to attack cereals, cake mixes, macaroni, cookies and chocolate. Merchant grain beetles are dark brown and have six saw-like teeth on each side of their bodies. They can grow to be one-eighth of an inch long and have very flat bodies.