Bioacoustics of Magnigryllacris tiga

Figures 1–5 Description. Male. Body large. Face ovoid; face with fine transverse riffles and impressed dots; fastigium verticis about two times as wide as scape ( Fig. 1A ). Ocelli indistinct. Pronotum with “V”-shaped furrow on each side ( Fig. 1C ); anterior margin slightly projected in the middle, posterior margin almost straight; humeral sinus distinct, lateral lobe shallow, trimmed. Wings surpassing hind knees, reaching the middle area of hind tibiae ( Fig. 5A ). Left tegmina ( Fig. 4A–B ): Radius with two branches, both forked near tip; media anterior fused in about basal third with radius; media posterior absent; cubitus anterior forks two veins in middle, then fused one veins; cubitus posterior fused in short with first anal veins; with 5 anal veins. Right tegmina ( Fig. 4C–D ): media fused in basal area with radius, MA and MP forked branches from R in about basal area; CuA and CuP undivided, free throughout; with 4–5 anal veins. Fore coxae with 1 spine. Fore and middle tibiae with 4 pairs of large spurs and 1 pair of apical spurs on ventral margins. Hind femora with 3–6 pairs spines on ventral margins; dorsal margins of tibiae 6–7 pairs of spines and 1 pair of spurs, ventral margins with 1 pair of subapical spurs and 2 pairs of apical spurs. Second and third abdominal tergites with few, very minute, indistinct stridulatory pegs. Eighth abdominal tergite prolonged. Ninth abdominal tergite prolonged downwards ( Fig. 5A ), semi-globular, the descending posterior area furrowed in midline ( Fig. 1D ), on both sides of split area with an obtuse bump and below bump with a small hook, which pointing downwards and slightly forwards ( Fig. 1E ). Subgenital plate wider than long, lateral margins convex; posterior margin obtusetriangularly excised, the lateral lobes obtuse ( Fig. 1F ). Styli conical, inserted apical area of lateral lobes of subgenital plate, with slightly compressed apical area. Female. Tegmina shorter than body. Tegmina ( Fig. 4E–H ): Media posterior absent; cubitus anterior forks in basal area to two veins, CuA1 and CuA2; cubitus posterior undivided, free throughout; with 5 anal veins. Seventh abdominal sternite wider than long, posterior margin with median projection, covering centro-basal area of subgenital plate, the middle slightly concave in the middle ( Figs. 2G , 3C–D ). Subgenital plate triangular, posterior margin widely rounded ( Figs. 2G , 3D ). Ovipositor longer, about three fourths times as long as body ( Fig. 5B ); slightly upcurved, especially in subbasal area; margins slightly and gradually narrowing towards tip; surface with furrow; dorsal margin with a slight expansion before tip ( Fig. 2F ); tip subacute. Coloration. Body green. Frons with 2 black spots at clypeo-frontal suture ( Figs. 1A , 2A , 3A ). Pronotum with 2 black spots ( Figs. 1B , 2B , 3B ). Veins of tegmina yellowish green, cells brown ( Fig. 4A, C, E, G ). Measurements (mm). BL: ♂ 25.0–29.0, ♀ 32.0–33.8; PL: ♂ 7.0–9.0, ♀ 7.0–7.6; HFL: ♂ 16.0–18.0, ♀ 18.0– 18.2.2; TL: ♂ 31.0–32.0, ♀ 26.8–32.0; OvL: 24.0–27.7.