Bioacoustics of Mongolodectes huangxinleii

Description. Male. Holotype . Body medium-sized compared with the congeners. Fastigium of vertex approximately as wide as first antennal segment; dorsally with a shallow median sulcus. Compound eyes subcircular. Disk of pronotum feebly widened caudad, with slightly concave anterior margin and feebly round approximately flat posterior margin; prozona smooth, faintly convex; metazona nearly flat. The first transverse sulcus positioned in anterior one-fifth, central transverse sulcus shallow, V-shaped. Lateral lobes of pronotum longer than deep. Tegmen one and a half times longer than pronotum, slightly extending beyond caudal margin of the fourth abdominal tergum; apex round (Fig. 1B). Stridulatory file on underside of left tegmen with 3/4 basal part bearing 40 distinct stridulatory teeth, and 1/4 apical part with about 20 indistinct small teeth. These teeth are widely-spaced arranged and gradually becoming larger centrad (Fig. 1A). Mirror on right tegmen comparatively small, rounded; secondary mirror developed, as long as 2/5 length of mirror (Fig. 1C). Fore coxae armed with a sharp spine. Fore femur with 4 small spines on anterior margin of ventral surface; median femur with 6–7 small spines on posterior margin of ventral surface; hind femur with 10 spines on anterior margin and 6 spines on posterior margin of ventral surface. Fore tibiae with 3 exterior spines on dorsal margin and 6 spines on both ventral margins; median tibiae with 1 anterior and 4 posterior spines on dorsal margins, and 5 spines on both ventral margins; hind tibiae with 7 spines on both dorsal margins and 13–14 spines on both ventral margins. Tenth abdominal tergite split into two similar triangular lobes in apical 2/5 part (Fig. 1D). Cerci of equal width until a large strong internal tooth situated at apical 1/3 part; apex with a comparatively small incurved hook. Subgenital plate as long as wide, with a wide U-shaped notch between styli; notch one eighth the length of subgenital plate itself (Fig. 1E). Female. Tegmen slightly extending beyond caudal margin of third abdominal tergite. Cerci twice as long as basal width, short conical. Subgenital plate with a widely trapezoidal medial incision in apical quarter (Fig. 1F). Ovipositor very long, slightly decurved, obliquely truncated at dorso-apical portion (Fig. 1G). Coloration. Colour faded due to preservation in alcohol. Generally brown nested with pale stripes in head, pronotum, tegmen and abdomen. Frons dark reddish brown. Apex of fastigium of vertex, antennal sockets, lateral stripe under each complex eye and palpi white. Disk of pronotum dark brown with white discontinuous lateral margin and longitudinal middle line. Lower half of lateral lobe of pronotum white. Interval spots on dorsal caudal margin of each abdominal tergum which gradually becoming smaller centrad white. Ventral surface of each abdominal sternum with red centre and white peripheral area; female last abdominal sternum with 2 dark brown, large, trapezoid lateral spots besides middle. Tegmen with dark brown longitudinal veins and white cross veinlets and nested with dark brown cells; mirror and peripheral membranes dark brown. Each coxa and trochanter white. Legs generally pale, with numerous regular or irregular stripes on femora.. Spines of legs generally white with dark brown tips. Cerci white. Notes. The new species resembles M. alashanicus and M. kaszabi in the female body size and length of ovipositor, but distinctly differs by the comparatively long female tegmen and shape of female subgenital plate. It is distinctly different from M. kiritshenkoi in its comparatively small body size, short tegmen and short ovipositor.