Bioacoustics of Lichenochrus servus

General. — Body of medium size, slender (figs. 14G–H). Head. — Antennae about twice as long as body; antennal scapus with apical spine. Fastigium of vertex triangular, not reaching apex of antennal sockets; grooved dorsally. Frons flat. Thorax. — Humeral sinus of pronotum absent; lateral lobe wider than high; metazona flat; posterior edge of metazona straight; pronotum surface weakly granulate. Prosternum armed with two short, widely spaced spines. Legs. — Front tibia unarmed dorsally; genicular lobes of front femur unarmed; genicular lobes of mid femur armed on inner side; mid tibia with 2 small spines dorsally; genicular lobes of hind femur unarmed. Wings. — Hind wing as long as tegmen; left stridulatory area coriaceous, without mirror (fig. 9A); right stridulatory area with small, roughly circular mirror (fig. 9B); stridulatory file nearly straight, bent in proximal forth, flat, with 147–160 lamelliform teeth, 1.73–2.1 mm long, 0.14–0.17 mm wide (n=2) (fig. 4E); tegmen distinctly surpassing apex of abdomen; vein Rs branching off slightly past middle of tegmen; veins Sc and R parallel along their entire length (fig. 4H). Abdomen. — Supraanal plate small, triangular; cercus unarmed, bent invards (fig. 4B) and downwards (fig. 4C) in apical fourth, apex slightly thickened; subgenital plate with small, triangular apical incision (fig. 4D). Stylus cylindrical, about 4 times as long as wide. Female subgenital plate narrowly triangular, with small apical incision (fig. 4G). Ovipositor. — Apex with upper valvula dentate, lower valvula smooth, pointed; dorsal edge of upper valvula sligthly convex in middle; ovipositor straight, slightly shorter than hind femur (ratio hind femur/ovipositor 1.06) (fig. 4F). Coloration. — Coloration brown, elytra with dark blotches along R and M; stridulatory area of male dark brown, distinctly darker than rest of tegmen; face with dark markings (fig. 4A); genae sometimes dark; hind wing fumose; occiput without markings; tegmen with posterior edge lighter then rest of wing (figs. 14G–H); abdominal sterna with posterior edge black or dark brown; subgenital plate with dark markings in central portion (fig. 4G). Measurements ( 3 males , 2 females ). — body w/wings: male 36.5–38 (37.3±.8), female 47; body w/o wings: male 30–34 (32.7±2.3), female 32–33 (32.5±.7; pronotum: male 6–6.2 (6.1±.1), female 6.5; tegmen: male 28.2–29.5 (29.1±.8), female 31–32 (31.5±.7); hind femur: male 18–20.5 (19.2±1.3), female 18–20 (19±1.4); ovipositor: female 17–18 (17.5±.7) mm.