Bioacoustics of Magnigryllacris hainanensis

Diagnosis. The new species differs from other congeneric species in: median ocellus with white margins and green central area ( Figs. 3A , 4A ); the spines of male ninth abdominal tergite widely separate ( Fig. 3I–L ); posterior margin of female seventh sternite with bilobate projections ( Fig. 4I ); posterior margin of female subgenital plate without median concavity ( Fig. 4I ). Male. Medium species. Face ovoid; fastigium verticis about 1.9 time as wide as scape; fastigium frontis separated from fastigium verticis by a very fine suture ( Fig. 3A ). Ocelli distinct. Fore coxae with 1 small spine; fore and middle femora unarmed, tibiae ventrally with 4 pairs of spurs and 1 pair of apical spurs; dorsal surface of middle tibiae with 1 internal spine. Hind femora with 5 – 6 internal and 9 external spines on ventral surface; dorsal surface of tibiae with 6 – 7 pairs of spines and 1 pair of apical spurs, vetral surface with 1 pair of subapical spurs and 2 pairs of apical spurs. Wings slightly surpassing the apex of abdomen, reaching the middle area of hind tibiae ( Fig. 9A–B ). Left tegmen ( Fig. 4A–B ): Radius with two branches, both forked near tip; media anterior fused in basal area with radius; media posterior absent; cubitus anterior forks before mid-length of tegmen into two veins, CuA1 and CuA2; cubitus posterior undivided, free throughout; with 5 anal veins. Right tegmen ( Fig. 4C–D ): Radius with two branches, both forked near tip; media anterior fused in basal area with radius, then forks into two veins, MA and MP; cubitus anteiror and cubitus posterior undivided, free throughout; with 5 anal veins. Second and third abdominal tergites with few, very minute stridulatory pegs ( Fig. 3F ). Eighth abdominal tergite prolonged ( Fig. 3G ). Ninth abdominal tergite semi-globular curved downward; the descending posterior area with a pair of swellings separated by a shallow furrow in midline, below that swelling with a small spine on both sides ( Fig. 3I–L ). Subgenital plate almost twice as wide as long; poterior margin slightly obtuse-triangularly concave ( Fig. 3I ). Styli inserted laterally at posterior margin of subgenital plate ( Fig. 3I ). Female. Seventh abdominal sternite prolonged, posterior margin bilobate, between the lobes with one shallowly concavity ( Fig. 5H, I ). Subgenital plate elongate triangular with rounded apex ( Fig. 5I ). Ovipositor obviously upcurved, margins slightly and gradually narrowing towards apices; dorsal margin of subapices slightly expanded ( Fig. 5F ).