Wheat bugs, also known as grain weevils or flour beetles, are small insects that infest stored grains and flour products. They have elongated snouts and chewing mouth parts and are usually reddish-brown or black in color. This specimen is black. They can grow up to five millimeters in length, but their larvae are much smaller and live inside the grains. Under a microscope, wheat bugs look like tiny beetles with segmented bodies, six legs, and antennae. Their snouts are not clearly visible from this angle. Their larvae would look like white worms with tan heads, curled up inside the hollowed-out grains.