When mature, they burrow underground and excavate a chamber where they pupate. Mating takes place and eggs are laid in a foam nest inside the burrow. The hatching larvae then burrow through the soil towards the bulbs and consume their interiors. The larvae burrow their way into the seed, feeding on the endosperm. In corn, larvae will even burrow into the corn ear to eat the kernels. She finds a spot soft enough to allow her to dig a sideways slanted burrow. The mites burrow into the skin to live and deposit eggs. The worms instinctively burrow to the bottom of the pile. Most men formed units to burrow out of the camp using tunnels. Cockroaches can burrow into human ears, causing pain and hearing loss. Using their underbellies, they burrow downward into the soil about . Lice cannot burrow into the skin. Some wait for passing prey in or near the mouth of a burrow. Kangaroo rats live in complex burrow systems. They burrow underground and emerge at the end of summer.