Bioacoustics of Poecilimon nonveilleri

Description. A medium sized, rather stout species with very narrow fastigium verticis. Fastigium verticis distinctly narrower than scapus ( Tab. 5 , Figs. 7 M–N), furrowed above. Postfemora with 4–15 spinules on interior and exterior ventral margins. Male. Pronotum ( Figs. 7 I–L) moderately to strongly raised in metazona; metazona with strongly diverging lateral margins; apex subtruncate to concave. Abbreviated tegmina covered by pronotum in circa basal third; stridulatory vein usually visible from above or above-behind. Stridulatory file ( Fig. 10 B) with 200–250 teeth ( Tab. 6 ). Cerci ( Fig. 7 O–P) strongly curved before apex, more or less constricted before apical tooth. Subgenital plate narrowing behind middle with a faint median keel in apical half which is sometimes lacking; apex truncate or with a very shallow triangular excision; both apico-lateral corners often but not always pointed. Female. Pronotum with dorsal margin substraight to distinctly raised in metazona; apex truncate to distinctly concave. Tegmina overlapping; hardly projecting behind pronotum; apex nearly truncate. Cerci very slightly curved; apex subacute to subobtuse. Subgenital plate triangular to almost semicircular, with a weak median keel; apex sometimes faintly protruding in middle. Ovipositor ( Fig. 7 Q) stout, apex dentate. Coloration. Male. Light form: Green, indistinctly stippled with black. Antennae yellow. Pronotum with red or black or with red (externally) and black (internally) lateral bands of variable shape and length, present at least in metazona; discus in metazona partly yellow. Tegmina yellow, discus faintly infumate (brown). Abdominal tergites green with two yellowish white lateral bands and sometimes with up to four small black dots at the base of some tergites on both sides of the white bands. Dark form: Yellowish brown to olivaceous, legs dark to reddish brown. Black dots more distinct than in the light form. Antennae infumate except at yellow base, but not distinctly annulated. Vertex black. Disc of pronotum with prozona almost completely black, metazona with a median and two lateral black bands which are fused along posterior margin. Tegmina yellow with disc distinctly infumate. Abdominal tergites with a median and two lateral black bands, the lateral bands interrupted before posterior margin of each tergite; last tergite black. In contrast to the dark form of P. pseudornatus , the epiproct is black, while the legs are dorsally not black. Female. Light form: Uniformly green or less commonly yellowish brown when alive. Pronotum with red lateral stripes in metazona. Tegmina yellow. Dark form: As in male. The dark form appeared when specimens were bred from the egg in laboratory as with the other species mentioned above. It is thus not unlikely that it is induced by crowding during the nymphal development under breeding conditions. The brown colour variant was found in the Sušica canyon at a forest edge on litter.