An allomone is any chemical substance released by an individual of one species that affects the behavior of a member of another species to the benefit of the originator but not the receiver. Production of allomones is a common form of defense, such as by plant species against insect herbivores or prey species against predators. Sometimes species produce the sex pheromones of the organisms they exploit as prey or pollinators (such as bolas spiders and some orchids). Male sex pheromone of Dacini fruit flies, besides acting as aggregation pheromone to form lek, also acts as an allomone to deter lizard predation.    The term "Allomone" was proposed by Brown, Eisner, and Whittaker to denote those substances which confer an advantage upon the emitter.