Bioacoustics of Losbanosia tamdaoensis

DESCRIPTION: Length of body 4.06 mm , length of tegmen 10.1 mm . General colour brownish, face darker brown, rostrum yellowish, antennae reddish­brown, femora brownish, tibiae and tarsi yellowish; tegmen hyaline with blackish markings, costal margin red, subcostal area of apical portion of tegmen with whitish markings, basal portions of veins red, apical portion brownish; wings hyaline, with smoky background and blackish markings in apical portion, venation red. Vertex ( Fig. 13 ) triangular, twice as wide at base as long in mid line ( 0.16 mm ), with bifurcate apex and concave posterior margin, disc distinctly excavate; frons 0.78 mm long, with lateral carinae close to each other; postclypeus 0.61 mm long, convex, with distinct median and lateral carinae; anteclypeus 0.48 mm long with distinct median carina; rostrum 0.92 mm long, subapical segment 4.5 times longer than apical one, apical segment as long ( 0.17 mm ) as wide; compound eyes with distinct ventral incision ( Figs. 14 & 15 ), ocelli lacking; 2nd antennal segment ( Fig. 16 ) 1.31 mm long, cylindrical with apical concavity, covered with numerous sensillae. Pronotum ( Fig. 13 ) distinctly wider than head with compound eyes, 1.53 mm wide, 0.14 mm long in mid line, with median carinae and distinct postocular carinae reaching posterolateral margin; posterior margin distinctly incised; disc of pronotum in anterior lower portion and posterior portion covered with whitish tubercles. Mesonotum 1.63 mm long in mid line, 1.7 mm wide, with distinct median carina and lateral carinae, disc distinctly convex, posterior margin carinate. Metanotum with anterior margin carinate, 0.49 mm long in midline, with median carina, anterior margin distinctly incised, posterior margin roundly triangular. Tegmina ( Fig. 18 ) longer than widest part about 3.4:1, longer than wings about 1:0.34, with anterior margins almost straight, posterior margin subparallel, slightly concave, with rather indistinct undulation; vein RA with two terminals, RP with three terminals, M with 5 terminals, CuA + CuP with 4 terminals; second transverse veinlet m­cu short. Wings ( Fig. 19 ) with anterior margin arched anteriad in median portion, ScRA reaching margin about half of wing length, RP and M fused in subapical portion, at the level of m­cu veinlet, M with single terminal, CuA with three terminals, CuP distinctly curved, and deflected basad in terminal portion, at the level junction of CuA2 with CuP, PCu distinctly curved, stridulatory area on anal field distinct. Fore and mid tibiae slender, subequal in length ( 2.35 mm ), hind femur 1.14 mm long, hind tibia ( Fig. 17 ) 2.69 mm long, slender, with distinct subapical lateral spine and second lateral spine distinctly apicad of half of hind tibia length; tarsus 0.95 mm long, basitarsomere 0.64 mm long, longer than combined length of mid and hind tarsomeres, mid and hind tarsomeres subequal in length ( 0.34 mm ), tarsal claws delicate; tibio­metatarsal formula 5:5:5. Abdomen ( Figs. 20–22 ) with genital segment about as long as anterior part of body, IIIrd abdominal sternite with distinct (sensory?) pits in median portion and at caudal margin; IVth and Vth abdominal sternites pitted, VIth abdominal tergite with distinct crest and with two impressions, VIIth tergite with distinct crest and single impression, VIIIth tergite with small crest. Pygofer ( Figs. 20, 22 & 23 ) 0.64 mm long in mid line, with distinct, diamond­shaped, distinctly convex medioventral process; posterolateral margin of pygofer oblique, with distinct, acutely rounded process; anal tube ( Fig. 24 ) 0.98 mm long, slender, about 3 times as long as wide at base, distinctly wider at base, basal portion narrowing apicad, with lateral margins subparallel, apex rounded, without median incision and processes, dorsal portion with bilobed apical margin, anal style quite long; aedeagus ( Figs. 28–30 ) with acute endosomal process; in right lateral view flagellar lobe with distinct apical concavity, phallotheca with additional process on caudal margin directed dorsolaterally right; genital style ( Figs. 25–27 ) with narrow basal portion, apical portion subquadrate, with distinct posterior margin curved mediad, distinct subapical dorsal process present, dorsal margin at middle with distinct, hooked posterolaterad process, ventral margin with distinct ventrolateral, subtriangular protrusion.