Bioacoustics of Onychopygia brachyptera

Description. Holotype male. General color is light brown, femora with apical area black, wings’ venation yellowish. Head : Fastigium slightly pronounced scape and pedicel unarmed, frontal ocellus oval, lateral ocelli inconspicuous. Thorax : Pronotum softly granular with pronotal regions distinct ( Fig. 5 ). Prosternum armed with two small pyramidal spines. Mesosternum rectangular, mesosternal striae separated by the anterior lobe, not connecting with the lateral ones. Metasternum hexagonal, wider than long; anterior lobe expanded, separating the lateral lobes, metafurcal furrow deep and elongated, as wide as the inferior lateral margin of the anterior lobe, anterior lobes of meso and metasternum armed with one spine subelevated over each infero-external margin ( Fig. 6 ). Coxae armed with typical Eucocconotini tribe tubercula. Anterior and medial femora and tibiae cylindrical and slender, posterior femora with regular shape and armed with three or four ventral spines close to the apex, posterior tibiae armed with spines above ventral and dorsal margin. Posterior femora genicular lobes armed, anterior femora unarmed, middle tibiae genicular lobes’ external margin armed on the internal face. Wings : Tegmina barely covering the first abdominal tergite, venation reticulated, M vein and base of the R strongly sclerotized and prominent ( Fig. 7 ). Stridulatory region sclerotized with the exception of the mirror which is membranous and notorious in both tegmen. Stridulatory crest prominent, thinning from left to right, stridulatory row with 103 laminar and elongated teeth, tight spaced ( Fig. 8 ). Abdomen : wide, ninth and tenth tergites fussed and as wide as the sixth, seventh and eight tergites together, compressing slightly on the posterior margin above the dorsum, forming a wide “U” shaped emargination ( Fig. 2 ); epiproctum widened, covering the cerci and thinning from the medial region in the whole length, forming from there on a cylindrical prolongation that curves moderately, fitting in the emargination of the subgenital plate, apex truncate and in sucker shape ( Fig. 3 ). Subgenital plate rectangular up to mesal region where it narrows down abruptly, apex bifurcated in lateral view, emargination “U” shaped ( Fig. 4 ). Cerci are minute, curving towards their posterior margin. Allotype female. Similar in shape and color to the male ( Fig. 9 ). Epiproctum lanceolate, apex truncate and covering the anal aperture. Ovipositor as long as a fourth part of the total length of the body, curving gradually towards the sharp apex, ventral and dorsal margin without denticulations ( Fig. 11 ). Subgenital plate rectangular, apex prominent and “U” shaped ( Fig. 10 ). Measurements: (mm) Holotype : Total length 37.0; pronotum 4.0; tegmina 4.0; hind femora 17.0; hind tibiae 20.0; subgenital plate 8.0; cerci 0.9. Allotype : Total length 39.0; pronotum 5.0; tegmina 3.2; hind femora 18.0; hind tibiae 20.0; subgenital plate 4.2; ovipositor 12.0. Paratypes : Total length 36.0-37.0; pronotum 4.0; tegmina 3.8-4.0; hind femora 17.0-17.5; hind tibiae 20.0-21.0; subgenital plate 8.0; cerci 0.9.