Bioacoustics of Apterolarnaca biprocera

Figures 1–2 Description. Male. Body medium. Fastigium verticis about two times as wide as scape, projecting forwards; fastigium frontis separated from fastigium verticis by a wide suture; face conically swollen in lateral view with sparse dots ( Fig. 1C ). Ocelli indistinct. Pronotum with anterior margin slightly projecting, posterior margin faintly concave ( Fig. 1B ); lateral lobes longer than high ( Fig. 1C ). Fore coxae swollen with 1 spine ( Fig. 1C ). Fore and middle femora unarmed on ventral surfaces, hind femora with 3–8 internal and 2–5 external spines on ventral surface ( Fig. 1D ). Fore and middle tibiae ventrally with 4 pairs of spurs and 1 pair of apical spurs, middle tibiae with 1 internal spine on dorsal surface. Hind tibiae with 2–3 pairs of spines on dorsal surface, apices with 1 pair of dorsal spurs and 2 pairs of ventral spurs. Second and third abdominal tergites each with two rows of stridulatory pegs ( Fig. 1D ). Posterior margin of eighth abdominal tergite arched in the middle area ( Fig. 1G ). Posterior margin of ninth abdominal tergite prolonged to ventrad, furrowed in middle area, ventral angles extended into a curved spine which S-shaped in apical view, its tip acute and curved downward and forward. Tenth abdominal tergite with 1 pair of conical processes ( Fig. 1G ). Subgenital plate transverse, furrowed along the midline, swollen on both sides ( Fig. 1I ); posterior margin heartshaped concave, the lateral lobes prolonged into digitiform lobes ( Fig. 1H ). Female. Seventh abdominal sternite broad, posterior margin projecting in middle. Subgenital plate longer than wide; basal one-fifths areas of lateral margins wide, then contracted and narrowing to apex, posterior margin angular ( Fig. 2H ). Ovipositor short, apical half gradually upcurved; dorsal and ventral margins smooth, apices obtuse ( Fig. 2G ). Coloration. Body yellow brown, darker. Fastigium verticis with transverse black stripe which suited the wide suture between fastigium frontis and fastigium verticis ( Figs. 1A , 2A ). The conical swelling of face black which extending into the posterior margin of pronotum, in dorsal surface of head forming a semicircular black pattern, in the disc of pronotum which widened at anterior, middle and posterior areas. Genae with black longitudinal stripes below eyes. Thoracic tergites with black margins ( Figs. 1B , 2B ). Apices of fore and middle femora black. Basal and apical areas of all tibiae black, and dorsal spines of hind tibiae black.