Fig. 6. Relationship between T-cell best frequency (frequency with the lowest intensity threshold) and peak frequency of the calling song for 13 species of Tettigoniidae. Sources: Neoconocephalus ensiger (Faure and Hoy, 2000b); Amblycorypha rotundifolia (Forrest et al., 2006); Acripeza reticulata, Caedicia longipennis, Mygalopsis marki (Hill and Oldfield, 1981); Decticus sp. (Nebeling, 2000); Neoconocephalus retusus (Schul and Sheridan, 2006); Phaneroptera falcata (Schul et al., 2000); Ancistrura nigrovittata (Stumpner and Molina, 2006); Conocephalus saltator, Drepanoxiphus modestus, Phlugis sp. 1 and sp. 2 (Suga, 1966).