removed a 2 centimeter long botfly larva from a child's eye socket.Only one bot fly species attacks humans, the Dermatobia hominis. From Wikipedia: Botflies deposit eggs in a host body, or sometimes use an intermediate vector: common houseflies for example. Eggs are deposited in animal skin directly, or the larvae drop from the egg: the body heat of the animal induces hatching upon contact. Some forms of botfly also reside in the digestive tract when consumed by a licking action. Myiasis can be caused by larvae burrowing into the skin (or tissue lining) of the host animal. Mature larvae drop from the host and complete the pupal stage in soil.