Bioacoustics of Separatula adunca

Description. Male ( holotype ). Colouration of body yellowish with greyish tinge and following marks: head dorsum with large triangular greyish brown area reaching apex of upper rostral tubercle and having whitish longitudinal (median) line; rest of epicranium and clypeus with numerous rose dots (these dots forming five vertical bands: one median band under rostral apex, a pair of medial ones under antennal cavities, and a pair of lateral bands along posterior edges of genae; Figs 173–175 ); antenna light yellowish grey with brown and light brown marks on scape; pronotum with greyish brown disc having median whitish line and a pair of light stripes along lateral edges, and with yellowish lateral lobes fused with latter stripes and having numerous rose dots ( Figs 174, 175 ); tegmina light yellowish grey with semitransparent cell membranes, several small brown spots on lateral field, and slightly darkened some parts in dorsal field ( Figs 177, 178 ); hind wings transparent with brownish venation and with distal portion of costal part as in Fig. 176 ; legs with numerous brown, light brown and rose small spots and dots; rest of body yellowish grey with rose marks and dots on thoracic sternites, pleurites and majority of abdominal tergites, with light brown last tergite and most part of cercus, with brown proximal and distal areas on cercus, and with almost whitish abdominal sternites and genital plate ( Figs 183–185 ). Structure of head, pronotum and wings as in Figs 173–178 ; tegminal stridulatory apparatus as in Figs 177, 178 ; dorsoproximal part of cercus without process ( Figs 183, 185 ); rest of cercus short and rather thick, with distal half almost angularly curved upwards and characteristically arcuate from behind (medial edges of cercal distal part with distinct but low dark arcuate keels) ( Figs 183, 185 ); genital plate with distinctly narrowed apical part having a pair of long and thin posterior lobules which almost spine-like and arcuately directed aside ( Fig. 184 ); genitalia completely membranous ( Fig. 186 ). Variation. Body colouration sometimes slightly lighter and less spotted. Female . General appearance as in light male, but: tegminal stridulatory apparatus undeveloped; membranous area between last tergite and epiproct (and between this tergite and cercal bases) also undeveloped; cerci smaller and less specialized but with dorsoproximal convexity on each cercus having one small denticle directed backwards/upwards; genital plate slightly longer than its width, without additional lateral convexities in middle part and with very small posteromedian notch ( Fig. 187 ); eighth abdominal tergite with posteroventral corners elongate and directed backwards/downwards (outer surfaces of each this corner dark and shallowly concave as well as with small curved whitish tubercle near apex of this corner; Fig. 188 ); ovipositor as in Fig. 188 . Length (mm). Body: male 12.5–14.0, female 13.0; body with wings: male 26.0–28.0, female 28.0; pronotum: male 2.6–2.9, female 2.8; tegmina: male 19.0–22.0, female 23.0; hind femora: male 13.5–14.0, female 16.0; ovipositor 5.0. Comparison. The new species differs from S. falcata and S. wilsoni in the structure of male cercus lacking any hook-like or spine-like process on its dorsoproximal part.