Bioacoustics of Stenoscelodes capitulus

Redescription. Measurement (n = 10; in mm): BL 4.48–5.32; RWB 0.63–0.76; RL 0.44–0.50; PW 1.61–1.93; PL 1.23–1.51; EW 1.79–2.03; EL 2.84–3.50. Body ( Figs 19 & 20 ) cylindrical; color black; antennae, apex of tibiae, tarsi dark brown. Head . Postocular constriction absent; eyes flat; forehead with a shallow median fovea; dorsal surface reticulate, with minute setae; punctures small, sparse on vertex, medium, moderate in dense on forehead. Rostrum 0.6–0.7 times as long as basal width, parallel-sided; surface weakly reticulated, rugosely punctate; punctures medium, moderate in dense; epistome weakly prominent at right side, with six setae; median sulcus absent; scrobe with upper margin directed to middle of eye. Antennae weakly curved, clavate; scape slightly shorter than funicle, not reaching middle of eye; funicle seven segmented; first segment of funicle wider than long; club nearly round, somewhat compressed, slightly longer than funicle. Prothorax 0.8–0.8 times as long as wide, broadest near posterior margin, obliquely narrowed anteriorly; anterior margin weakly sinuate or not, narrower than posterior margin; subapical constriction weak, obsolete on dorsum; dorsal surface moderately reticulate; punctures on disc small, absent along basal part of midline; interspace wider than diameter of punctures; punctures on collar smaller than on disc; fore coxa almost contiguous. Mesoventrite depressed below the level of metaventrite; mesoventral process tongue shape, about quarter width of mesocoxal cavity. Metaventrite almost as long as abdominal ventrite I; median sulcus indistinct; metacoxal cavity moderately separated. Elytra 1.5–1.7 times as long as wide, 2.1–2.3 times as long as and 1.1–1.1 times as wide as pronotum, parallel-sided; subapical margin not dilated; apex conjointly rounded; intervals moderately convex; surface smooth, with irregular two rows of minute punctures; punctures not bearing setae on dorsum, bearing minute setae on declivity; ninth interval weakly carinate apically, connecting third and second intervals, not reaching suture; striae smooth anteriorly, finely reticulate posteriorly, with a row of small punctures; first to fourth, seventh, and eighth striae not reaching base. Hind wings developed. Legs . Femora not pedunculate; front tibia not sinuate, with dorsal side covered with setae apically; subapical fringe indistinct; apex with large uncus on outer angle and small premucro on inner angle; inner setose fringe not angulate; third tarsomere slightly emarginate, slightly wider than second tarsomere. Abdomen with suture between ventrites I and II complete. Male terminalia ( Figs 21–24 ). Tergite VII without stridulatory plectra. Sternite VIII divided, with long setae on apical margin; spiculum gastrale asymmetrically curved, weakly emarginate basally, expanded and flatten at apex. Aedeagus with body 1.5 times as long as wide, parallel sided, arcuately narrowed apically, slightly protruded at apex, weakly curved ventrally in lateral view, without setae on apical margin; endophallus with a large triangular sclerite on subapical part and a pair of medium sclerites on ventral side of the large sclerite, a complex sclerotized structure on basal part; apodeme 1.0 times as long as body length; tegmen U-shaped, without dorsal part; manubrium poorly developed. Female terminalia ( Figs 25–27 ). Tergite VII without stridulatory plectra; sternite VIII with long setae on posterior margin; spiculum ventrale extended to right side, slightly bifurcate at base; gonocoxites weakly sclerotized; styli reduced in size, without distinct setae on apex. Spermatheca falciform; apical moderate in length, roundly narrowed to apex; collum and ramus close, not developed.