Bioacoustics of Adapantus (Neoadapantus) affluens

General. — Body of medium size, slender (figs. 13A–B). Head. — Antennae more than twice as long as body; fastigium of vertex triangular, reaching apex of antennal sockets, grooved dorsally; frons flat. Scapus with small apical spine. Thorax. — Humeral sinus of pronotum absent; lateral lobe wider than high; metazona flat; posterior edge of prozona straight; pronotum surface smooth to weakly granulate. Prosternum armed with two short spines. Legs. — Genicular lobes of front femur armed with spines on outer side only; genicular lobes of hind femur armed on both inner and outer sides; mid tibia unarmed dorsally. Wings. — Tegmen distinctly surpassing apex of abdomen; vein Rs branching off in apical third of tegmen; veins Sc and R converging towards apex of tegmen; left stridulatory area coriaceous, without mirror (fig. 8A); right stridulatory area with small, circular mirror (fig. 8B). Stridulatory file weakly bent, flat, with 119 lamelliform teeth, 1.45 mm long, 0.15 mm wide (fig. 3K). Hind wing as long as tegmen. Abdomen. — Cercus unarmed, bent in apical fourth; apex of cercus slightly thickened (fig. 2C); subgenital plate with small, triangular apical incision; stylus cylindrical, more than 3 times as long as wide; subgenital plate narrowly triangular, with small apical incision (fig.3F); supraanal plate small, triangular. Ovipositor. — Ovipositor slightly curved, shorter than hind femur (ratio hind femur/ovipositor 1.18–1.29), dorsal edge of upper valvula slightly convex in middle; apex pointed, with upper valvula minutely dentate, lower valvula smooth (fig. 3H). Coloration. — Coloration straw brown to dark brown, sometimes mottled; face light brown, without darker markings; occiput with dark band continuous with band on dorsal surface of pronotum; tegmen often with posterior edge lighter or darker then rest of wing (figs. 13A–B); hind wing fumose. Measurements ( 8 males , 7 females ). — body w/wings: male 32–35 (33.6±1.1), female 39–42 (40.5±1); body w/o wings: male 29–32 (30±1.2), female 26.5–31 (28.9±1.8); pronotum: male 5.5–6 (5.9±.2), female 6– 7 (6.3±.4); tegmen: male 25–27 (26.2±.7), female 25–29 (27.1±1.3); hind femur: male 18–20 (18.9±.6), female 19–22 (20.3±1); ovipositor: female 16–17 (16.5±.5) mm.