Bioacoustics of Homogryllacris platycis

Description. Male. Body medium. Fastigium verticis slightly wider than scape. Face with scattered impressed dots ( Fig. 3A ). Eyes long ovoid, ocelli distinct. Anterior margin of pronotum slightly projecting, posterior margin nearly straight ( Fig. 3B ), lateral lobes longer than high. Wings developed well, slightly surpassing apex of abdomen and reaching the basal third of hind tibiae ( Fig. 4A–B ). Tegmina ( Fig. 4C–D ): radius with RS branching little before middle of tegmen, both forked near tip; MA undivided; cubitus anterior forks after basal third into two branches, CuA1 and CuA2; cubitus posterior undivided, free throughout; with 4 anal veins, the last two with common base. Fore coxae with 1 small spine. Fore and middle tibiae with 4 pairs of long spurs and a pair of short apical spurs on ventral surfaces separately; middle tibiae with an internal apical spine on dorsal surface. Hind femora with 11 internal and 6–8 external spines on ventral surface; tibiae with 6 internal and 7 external spines on dorsal surface, 1 pair of dorsal apical spurs, 2 pairs of ventral apical spurs, and 1 pair of ventral subapical spurs. Two and three abdominal tergites each with two rows of minute stridulatory pegs ( Fig. 3G ). Ninth abdominal tergite semiglobular in dorsal view, posterior margin with a semicircular concavity ( Fig. 3D, F ). Tenth abdominal tergite very short, with a pair of long projections, in basal half crossing each other and largely hidden under the ninth abdominal tergite, the apical half terminating into a compressed spine pointing to ventrad and slightly forward and with subacute tip ( Fig. 3G, H ). Subgenital plate longer than wide, the lateral margins convex, posterior margin with V-shaped concavity in the middle ( Fig. 3I ). Styli located at apico-lateral angles of subgenital plate ( Fig. 3I ). Female. Body longer than male. Tegmina ( Fig. 6C–D ): radius with RS branching about apical third area of tegmina, both forked in subapical area; media of left tegmen forks behind basal third into two branches, MA and MP, shortly after the second branch divides into MP1 and MP2, while MP of right tegmen not divide till tip of tegmen; cubitus anterior and cubitus posterior undivided, free throughout; with 4 anal veins, the last two with common base. Seventh abdominal sternite obviously longer than preceding sternites; apical half membranous with tansverse folds ( Fig. 5H ). Subgenital plate nearly triangular, posterior margin concave in the middle, the lateral lobes obtuse ( Fig. 5I ). Ovipositor very long and straight, margins slightly converging ( Fig. 6A–B ); apices narrowly obtuse ( Fig. 5F ). Coloration. Body yellowish green ( Figs. 4A–B , 6A–B ). Fastigium verticis with a transverse black spot ( Figs. 3A , 5A ); margins of antennal sockets black, internal margin of scape with one black spot on basal and apical areas separately, basal area of pedicel internally with a black spot ( Figs. 3A , 5A ). Processes of male tenth abdominal tergite with brown apical half ( Fig. 3H ). Measurements (mm). Male: BL 18.4, PL 5.4, TL 18.9, HFL 15.2; female ( paratype ): BL 27.5, PL 5.3, TL 18.1, HFL 13.9, OvL 25.8.