58961-004-CB041AC2.jpg


"parasitism, relationship between two species of plants or animals in which one benefits at the expense of the other, sometimes without killing it. Parasitism is differentiated from parasitoidism, a relationship in which the host is always killed by the parasite; parasitoidism occurs in some Hymenoptera (ants, wasps, and bees), Diptera (flies), and a few Lepidoptera (butterflies and moths): the female lays her eggs in or on the host, upon which the larvae feed on hatching."

http://www.britannica.com/EBchecked/topic/443191/parasitism