reply clicks of sexually receptive female cicadas. This example of acoustic aggressive mimicry is similar to the Photuris firefly case in that the predator's mimicry is remarkably versatile – playback experiments show that C. leucoviridis is able to attract males of many cicada species, including Cicadettine cicadas from other continents, even though cicada mating signals are species-specific. The evolution of versatile mimicry in C. leucoviridis may have been facilitated by constraints on song evolution in duetting communication systems in which reply signals are recognizable only by their precise timing in relation to the male song (<< 100 ms reply latency). Kirbyan or brood parasite mimicry Host-parasite mimicry is a situation where a parasite mimics its own host. As with mimicry of the female sex outlined previously, only two species are involved, the model and mimic being of the same species. Brood parasitism, a form of kleptoparasitism where the mother has its offspring raised by another unwitting organism, is one such situation where host-parasite mimicry has evolved. Georges Pasteur terms this form of aggressive-reproductive mimicry Kirbyan mimicry, after the English entomologist William Kirby. Wicklerian-Eisnerian or mimicry of harmless species The prey does not have to be attracted towards the predator for the predator to benefit: it is sufficient for the predator simply not to be identified as a threat. Wicklerian-Eisnerian mimics may resemble a mutualistic ally, or a species of little significance to the prey such as a commensal. For example, the spider Arachnocoris berytoides resembles Faiditus caudatus, a spider commensal of ants. Mimicry of cleaner fish Mimicry of mutualistic species is seen in coral reef fish, where the models, certain cleaner fish, are greatly disadvantaged by the presence of the mimic. Cleaner fish are mutually beneficial to many other species, which allows them to eat their parasites and dead skin. Some allow the cleaner to venture inside their mouths and gill cavities to hunt these parasites. However, one species of cleaner, the bluestreak cleaner wrasse (Labroides dimidiatus), is the model of a mimic, the sabre-toothed blenny (Aspidontus taeniatus). The cleaner wrasse, shown in the image cleaning a grouper of the genus Epinephelus, resides in coral reefs in the Indian and the Pacific Oceans, and is recognised by other fishes who allow it to clean them. The blenny lives in the Indian Ocean and not only looks like the cleaner wrasse in terms of size and coloration, but even mimics the