Bioacoustics of Apterolarnaca truncatoloba

Description. Female. Body small. Fastigium verticis wider than scape. Face with very fine transverse “riffles” and sparse punctures; fastigium frontis separated from fastigium verticis by a very fine suture ( Fig. 3A ). Ocelli indistinct. Pronotum with anterior margin arched, posterior margin nearly straight ( Fig. 3B ); lateral lobes longer than high, anterior angle rounded, posterior angle slightly extending downwards ( Fig. 3C ). Fore coxae with 1 spine. Fore and middle femora unarmed on ventral surfaces, middle femora with 1 apicointernal spine, hind femora with 11–14 internal and 4 external spines on ventral surface. Fore and middle tibiae with 5 pairs of ventral spurs, including 1 pair of apical ones; hind tibiae with 5–6 internal and 6 external spines on dorsal surface, 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. 3E ). Subgenital plate inverted trapezoidal in ventral view ( Fig. 3J ), wider than long, the apico-lateral angles spine-shaped and curved dorsad ( Fig. 3G–H ). Ovipositor short and strongly curved upwards, with dorsal and ventral margins smooth, its apices obtuse ( Fig. 3H ); with a pair of ovoid, lateral sclerites at base of ventral valvulae, which projecting outwards ( Fig. 3J ). Male. Unknown. Coloration. Body yellowish brown. Ventral margins of antennal cavities blackish, face with 1 pair of blackish spots at fronto-clypeal suture. Eyes blackish brown. Doral surface of head with one large black spot behind antenna on each side, between area of antennae with irregular black spot along the midline ( Fig. 3B ). Margins of pronotum blackish ( Fig. 3C ). Apical areas of femora blackish, basal and apical areas of tibiae of all legs blackish; dorsal spines of hind tibiae black ( Fig. 3D ). Dorsal surface of abdominal tergites with longitudinal blackish band along the midline.