Bioacoustics of Mongolotettix shandongensis

( Figs. 1–12 ) Holotype ♂ , paratype ♀ , Shandong , Wendeng , Kunyushan , 37º20´N, 121º80´E 2009-8-13 , collected by Yin Zhan , Mo Tie-Lu & Xu Yong-Yu. Male Body small in size. Head shorter than pronotum. Face oblique in profile. Frontal ridge slightly widened downward. Antennae ensiform, 20 segmented, extending distinctly over hind margin of pronotum. Eyes oval, vertical diameter 1.7 times horizontal diameter and 1.4 times length of subocular furrow. Pronotum median keel visible, distinctly cut by hind transverse sulcus, lateral keels almost parallel, prozona 1.3 times of metazona in length. Tegmina reaching the 2/3 of hind femur, apically concave in the middle, maximum width of cubital area 1.8 times minimum width of medial area, Cub vein reaching to the apex of tegmen. Interspace of mesosternum distinctly narrowed in the middle, length 4.2 times minimum width. Lateral lobes of metasternum separated. Upper keel of hind femur smooth, length of hind femur 5.3 times its maximum width, end of lower knee lobes angular, inner side with 108 stridulatory pegs. Hind tibia with 13 spines on inner and outer sides, external apical spine absent. Second metatarsomere shorter than the first. Tympanum large and round. Cercus long conical, almost reaching tip of epiproct. Furculae large, circular at apex. Subgenital plate long conical, length 1.9 times maximum width. Width of epiphallus larger than high. Female: Body more robust than male. Vertical diameter of eyes 1.6 times horizontal diameter and 1.2 times the length of subocular furrow. Prozona 1.5 times metazoan in length. Tegmina short, extending over the middle of 2nd abdominal tergite, length 2.8 times its maximum width. Interspace of mesosternum slightly narrowed in the middle, length 2.3 times minimum width. Length of hind femur 5.1 times its maximum width. Cercus short-conical, not reaching end of epiproct. Subgenital plate long, length 1.8 times width, hind margin angulated in the middle. Upper ovipositor valve longer, length 3.5 times maximum width, with small teeth on outer margin. Coloration: Body brown. Antennae yellowish brown. Pronotum yellowish-brown. Tegmina of male with a white stripe on the fore margin at base. Tegmina of female with a black longitudinal stripe in the middle. Abdomen yellowishbrown, with a broad dark longitudinal stripe on both sides. Subgenital plate brown. Measurement (in mm): Length of body: ♂ 19.7, ♀ 29.3 Length of tegmina: ♂ 10.0, ♀ 4.1 Length of hind femur: ♂ 11.5, ♀ 15.8.