Bioacoustics of Marthogryllacris xiangjini

Figures 1–3 Description. Male. Body large. Face ovoid with fine “riffles” and impressed scattered dots; fastigium verticis separated by a very fine suture from fastigium frontis ( Fig. 1A ). Ocelli distinct, median ocellus slightly larger than lateral ocelli ( Fig. 1A ). Thorax. Anterior margin of pronotum projecting in middle, posterior margin nearly straight ( Fig. 1B ); lateral lobes longer than deep, anterior angle widely rounded, posterior angle rounded angular, ventral margin undulant, humeral sinus shallow ( Fig. 1C ). Legs. Fore coxae with 1 small spine. Fore and middle femora unarmed on ventral surfaces; hind femora with 10–13 internal spines and 6–8 external spines on ventral surface. Fore and middle tibiae ventrally with 4 pairs of spurs and 1 pair of apical spurs; hind tibiae with 6–7 pairs of spines dorsally, ventrally with 1 pair of subapical spurs, apices with 1 pair of dorsal spurs and 2 pairs of ventral spurs. Abdomen. Second and third abdominal tergites without stridulatory pegs ( Fig. 1E ). Eighth abdominal tergite prolonged. Ninth abdominal tergite prolonged, strongly bent down from dorsal surface ( Fig. 1F ); furrowed along the midline, on both sides with a large globular swelling, that on ventro-internal angle prolonged into a long process, pointing to the outwards and slightly ventrad and crossing each other ( Fig. 1H ), its apices obtuse with a small hook ( Fig. 1G ). Subgenital plate wider than long, lateral margins slightly converging after middle area, posterior margin faintly concave ( Fig. 1I ); with long, cylindrical and upcurved styli inserted at lateral margins about middle area. Female. Body slightly larger than male. Seventh abdominal sternite as sixth sternite with posterior margin arched, projecting. Subgenital plate with basal margin faintly membranous, lateral margins converging, posterior margin bilobate ( Fig. 2F ). Ovipositor elongate, gradually upcurved behind basal area, with converging margins, apices subacute ( Fig. 2E ). Coloration. General color light brown. Head reddish brown, genae and labrum black, apical two segments of maxillary palpi blackish, ocelli pale yellow, antennae yellowish. Pronotum with transverse black band along anterior and posterior margins ( Fig. 1C ); genicular areas of hind femora black, hind tibiae with black spines. Tegmina light yellowish, towards posterior margin lighter; in basal half with two black bands; hind wings semitransparent white, main veins yellow to brown; cross veins brown. Abdominal tergites with black bands on lateral margins. Ovipositor black brown. Measurements (mm). BL: ♂ 31.0–35.1, ♀ 36.2; PL: ♂ 6.0–7.8, ♀ 7.1; TL: ♂ 33.0–35.5, ♀ 34.5; HFL: ♂ 18.0–19.1, ♀ 19.4; OvL: 18.9.