Bioacoustics of Stenoscelodes hayashii

Redescription. Measurement (n = 10; in mm): BL 2.98–4.13; RWB 0.48–0.66; RL 0.25–0.35; PW 1.02–1.47; PL 0.88–1.23; EW 1.19–1.65; EL 1.96–2.66. Body ( Figs 10 & 11 ) cylindrical; color black; antennae, apex of tibiae, tarsi, base of elytra dark brown. Head . Postocular constriction absent; eyes flat; forehead without distinct median fovea; dorsal surface reticulate, with minute setae; punctures small, sparse on vertex, medium, dense on forehead. Rostrum 0.5–0.6 times as long as basal width, parallel-sided; surface weakly reticulated, rugosely punctate; punctures medium, 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 almost as long as funicle, not reaching middle of eye; funicle seven segmented; first segment of funicle almost as wide as long; club nearly round, somewhat compressed, as long as combination of former six segments. Prothorax 0.8–0.9 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 weakly reticulate; punctures on disc large, present along midline; interspace as long as or narrower 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 one-third width of mesocoxal cavity. Metaventrite almost as long as abdominal ventrite I; median sulcus indistinct; metacoxal cavity moderately separated. Elytra 1.6–1.7 times as long as wide, 2.2–2.4 times as long as and 1.1–1.2 times as wide as pronotum, parallel-sided; subapical margin not dilated; apex conjointly rounded; intervals moderately convex; surface smooth, with irregular row of minute punctures; punctures not bearing setae on dorsum, bearing minute setae on declivity; ninth interval rather strongly carinate apically, connecting third and second intervals, reaching suture; striae smooth throughout, with a row of medium punctures; first to fourth, seventh, and eighth striae not reaching base. Hind wings developed. Legs . Femora not pedunculate; front tibia slightly 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 12–15 ). 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 2.0 times as long as wide, parallel sided, obliquely narrowed apically, moderately protruded at apex, weakly curved ventrally in lateral view, without setae on apical margin; endophallus with a large triangular sclerite on subapical part, a sclerotized plate on dorsal side of basal part, a W-shaped sclerite on ventral side of basal part; the sclerotized plate rather wide; the W-shaped sclerite rather large, without a pair of sclerites on ventral side of the sclerite; apodeme 0.9 times as long as body length; tegmen V-shaped, without dorsal part; manubrium poorly developed. Female terminalia. ( Figs 16–18 ) Tergite VII without stridulatory plectra; sternite VIII with long setae on posterior margin; spiculum ventrale extended to right side, not bifurcate at base; gonocoxites weakly sclerotized; styli reduced in size, with a distinct seta on apex. Spermatheca falciform; apical part short, roundly narrowed to apex; collum and ramus close; collum developed; ramus not developed.