Bioacoustics of Euconocephalus longissimus

Description. Body large, slender ( Figs. 11–12 ). Fastigium verticis conical, extending beyond base of antennae, ventral margin about 3 times as long as longitudinal diameter of eyes, separated by a shallow sinuosity from fastigium frontis ( Figs. 1–2 ). Frons subsmooth, with shallow, scattered impressed dots, more distinct towards genae. Eyes subglobular. Pronotal disc flat and shouldered, with obvious lateral carinae; anterior margin depressed and rounded into posterior margin; lateral lobes slightly inclining, with rounded posto-lateral angle and obvious humeral sinus ( Figs. 3–4 ). Prosternum bispinose. Mesosternal lobes and metasternal lobes triangulate. Tegmina far surpassing knees of postfemora, subparallel margins in apical half, apex angular. Procoxae bearing a long spine; profemora with 2–4 internoventral spines, and unarmed on external side; genicular lobes of profemora angular; protibiae with 6 pairs of ventral spines. Mesofemora with 3 externoventral spines, and unarmed on internal side; genicular lobes of mesofemora spinose on internal side, and triangular on external side; mesotibiae with 7 pairs of ventral spines. Postfemora with 12–13 internoventral spines and 9–11 externoventral spines, genicular lobes of postfemora bispinose on both sides; posttibiae with 1 pairs of long dorsal spurs and 2 pairs of long ventral spurs on apex, 16–19 dorsal spines on internal side, 12–16 dorsal spines on external side, and 8–9 internoventral spines, 9– 12 externoventral spines. Male. Stridulatory field of tegmen not transparent ( Fig. 5 ); Cu2 vein slender and long, slightly curved in about middle, with about 105 teeth, teeth-distance subequal ( Fig. 6 ); mirror membranous subquadrate. Hindwings slightly shorter than tegmina. Tenth abdominal tergite globular; apical margin bulging and a little projecting, excised in middle and with a short rounded lobe on both sides of excision ( Fig. 7 ). Cerci short and cylindrical, with 2 internal spines, ventral spine longer than dorsal spine ( Fig. 7 ). Subgenital plate elongate, with a faint medial and two faint lateral carinae; posterior margin with triangular notch; styli short and stout, about 3 times as long as width ( Fig. 8 ). Titillators separate, sclerotised, symmetrical L-shaped, apical parts widened, and basal parts outcurved, densely covered by dentate projection (Fig. 15). Female. Tenth abdominal tergite with apex subtruncate, but triangularly furrowed in middle. Cerci elongate, conical, slightly curved, apices acute. Subgenital plate triangular, with a shallow arching notch ( Fig. 9 ). Ovipositor almost equal to length of postfemora, broadest in middle; dorsal margin convex, at base concave; ventral margin concave, at base convex; both margins smooth ( Fig. 10 ). Coloration. Body green. Eyes blackish brown. Maxillae orange, and slightly blackish at apices. Head with a pair of yellowish lateral stripes behind eyes, extending to post margin of pronotal disk. Tegmina green, veins yellowish, with blackish sub A-veins, and yellowish white in it. Tarsi light blackish brown. Titillators brown. Measurements (mm). Length of body: 346.0, Ƥ47.2; length of ventral margin of fastigium verticis: 35.3, Ƥ5.8; width of fastigium verticis: 31.9, Ƥ2.0; longitudinal diameter of eyes: 31.7, Ƥ1.7; length of pronotum: 39.8, Ƥ9.7; width of pronotum: 35.4, Ƥ5.2; length of profemora: 37.1, Ƥ7.8; length of postfemora: 326.6, Ƥ29.0; length of tegmina: 351.5, Ƥ60.5; width of tegmina: 35.3, Ƥ6.3; length of ovispositor: Ƥ28.5; width of ovispositor: Ƥ1.9.