Bioacoustics of Ocellarnaca emeiensis brachyptera

( Fig. 1 ) Description. Body medium. Head: Face ovoid; occiput nearly smooth; fastigium verticis broader, about two times as width of scapus. Eyes comparatively small, ovoid, protruding outwards. Ocelli very distinct, light yellow; median ocellus very large, lateral ocelli small. Pronotum broad and short, anterior margin slightly protruding forward, posterior margin concave. Abdominal tergites of two and three each with two rows of stridulatory pegs. Wings shortened. Tegmina:Apices of male tegmina reaching middle area of first abdominal tergite, veins parallel. Hind wings shorter than tegmina, not exposed. Legs. Procoxa with a spine at anterior margin, profemur and mesofemur unarmed on ventral surfaces, their tibiae with four pairs of long spines and a pair of short apical spurs on ventral surfaces. Postfemur with 6–8 spines on outer margin and 14–16 spines on inner margin of ventral surface; posttibia with 6–7 spines at both sides on dorsal surface separately, a pair of dorsal apical spurs and two pairs of ventral apical spurs, and a pair of subapical spurs. Coloration. Body light brown. Frons, genae, mandibles and anterior area of fastigium verticis black. Eyes black; median ocellus light, lateral ocelli light yellow. Scapus with base black, other area light straw brown. Pronotum with a broad longitudinal pink stripe in the midline; posterior area with a black stripe along the edge, which reaching anterior margin of lateral lobe. The spine on procoxa black, basal areas and apical areas of protibia and mesotibia black separately, apical area of tarsus and apical half of claw dark brown. Apical area, ventral surface of postfemur and base and apex of posttibia black; spines and spurs on posttibia black. Tegmen and hindwing veins light, cells brown. Sternites of thorax black, every abdominal sternite with a pair of black spots, eighth and ninth abdominal tergites black. Male. Eighth abdominal tergite long, ninth abdominal tergite comparatively short, globular, apex split, with a pair of stout and short projections, apices rounded; with an appendage on inner surface of basal area separately, which with base broad and apex acute. Subgenital plate broad and short, apical half with a rectangle-shaped bulge on the midline, posterior margin rounded. Styli medium length, conical, apices subacute, inserted on subapex of subgenital plate. Cerci long conical, apices rounded. Female. Unknown. Specimen examined . Holotype : male, Tiantaishan , Yizhang , Hunan , China , 4 August 2021 , Jian-Yu Chen. Measurement (mm) . body: ♂ 22.0; pronotum: ♂ 4.5; tegmen: ♂ 3.8; postfemur: ♂ 12.0.