Bioacoustics of Apterolarnaca huanglianensis

Figures 1–2 Description. Female (new description). Fore coxae with 1 spine. Fore and middle femora unarmed on ventral surfaces, hind femora with 9 internal and 8 external spines on ventral surface. Fore and middle tibiae with 5 pairs of ventral spurs, including 1 pair of apical ones; hind tibiae with 5 pairs of dorsal spines, 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. 2D ). Subgenital plate slightly shorter than wide, the lateral margins obviously narrowing from basal to apical area, posterior margin nearly straight, the apico-lateral angles rounded ( Fig. 2G ). Ovipositor short and strongly curved upwards, with dorsal and ventral margins smooth, its apices obtuse ( Fig. 2E ); with a pair of digitate sclerites at base of ventral valvulae, which projecting outwards ( Fig. 2G ). The coloration is same as the Bian et al. ’s (2021) description.

( Figure 1 ) Description. Male. Body medium, wingless. Frons with minutely punctate. Fastigium verticis about 1.2 times as wide as scape ( Fig. 1A ). Eyes ovoid; ocelli inconspicuous. Scape slightly longer than length of eyes, pedicel about two thirds the length of scape ( Fig. 1A ). Apical segment of maxillary palp with apex slightly inflated. Anterior margin of pronotum produced in the middle, posterior margin truncate, lateral lobes longer than deep, ventral margin undulating, humeral sinus absent ( Fig. 1B ). Fore coxae with 1 small spine; fore and middle femora unarmed on ventral surface. Hind femora with 7–9 pairs of spines on ventral margins; the internal spines are very large and thick, especially the 2 apical spines; the external spines are minute ( Fig. 1H ). Fore tibiae with 4 pairs of spines and 1 pair of apical spurs; hind tibiae arched curved ( Fig. 1H ), dorsal surface of with 5 pairs of spines on dorsal margins and the two apical spines distinct, the remainder tubercle swellings, apices with 1 pair of dorsal spurs and 2 pairs of ventral spurs. Second and third abdominal tergites with 2 rows of transverse stridulatory pegs on lateral margins separately ( Fig. 1D ). Ninth abdominal tergite globular, curved ventrad, the lateral margins forming with 1 pairs of spines, its apices spine-shaped, directing downwards and slightly inwards ( Fig. 1F, G ), between them wide space. Tenth abdominal tergite interrupted in the middle. Cerci short, conical, slightly upcurved, its apices obtuse ( Fig. 1F ). Basal margin of subgenital plate almost straight, posterior margin with 1 U-shaped concavity ( Fig. 1F ), the lateral margins forming 2 lobes, its apices curved dorsad and slightly forward ( Fig. 1F ). Female. Unknown. Coloration. Body yellowish. Eyes brown. Face and genae with black stripes, fastigium verticis black, occiput with 1 large semicircular spot on posterior margin varying from completely black reduced to two narrow stripes, between stripes with 1 median black bland which reaching the posterior margin of tenth abdominal tergite ( Fig. 1B, E ). Basal and apical areas of scape with 1 black ring separately; pedicel with 1 black ring in the middle; flagellum black brown. Margins of pronotum, mesonotum and metanotum black ( Fig. 1B ). Apical areas of fore and middle femora, basal and apical areas of all tibiae, and spines of hind legs black ( Fig. 1H ); spines of fore and middle tibiae and all tarsi blackish. Apices of lateral lobes of tenth abdominal tergite brown ( Fig. 1F ). Measurements (mm). BL: 20.4, PL: 3.8, HFL: 11.8.