Bioacoustics of Stictophaula bruneii

Description. Habitus typical for the genus ( Fig. 7 ). Head stout, its length about 0.4 times pronotum length. Fastigium conical, apical half tapering, distinctly narrower than antennal scapus, ridged in middle, apex obtuse not surpassing antennal scapus. Eye globular, prominently protruding. Frons smooth. Pronotum smooth, about 1.8 times longer than wide. Dorsal plate of pronotum with anterior margin slightly concave, with posterior margin broadly rounded, not emarginated in middle ( Fig. 8 A); with two U-shaped sulci, one before, the other about in middle; lateral margin gently widening posteriorly, lateral keels distinct, with pronotal dorsal plate [= disc (of pronotum)] angularly curved into lateral lobes; lateral lobe slightly taller than long, anterior margin distinctly concave, ventral margins angularly undulated, posterior margin very broadly rounded; angle between lateral keel and lateral lobe less than 90 ° ( Fig. 8 B). Thoracic auditory spiracle [= thoracic foramen] elongated, covered by pronotal lateral lobe. Prosternum unarmed. Mesosternum with triangular lobes, with apex of lobes obtuse; metasternal lobes elongated. Tegmen and hind wing fully developed. Tegmen with raised reticulation within cells, appearing glossy; narrow basally, widened gently medially and with apex narrowly rounded. Hind wing surpassing tegmen. Anterior coxa with a fairly elongated spine, with acute apex pointing ventrally. Anterior femur with four inner ventral subapical spines. Anterior tibia with internal tympanum conchate, external tympanum open and oval; with 2 outer and 3 inner subapical ventral spines and 1 inner apical dorsal spine present. Middle femur with 5-6 outer subapical spines. Middle tibia with 8-10 outer and 3-4 inner ventral subapical spines and 1 inner apical dorsal spine present. Hind femur with 3-6 outer and 3-4 inner minute ventral subapical spines; hind knee with bispinose lobe, ventral spine minute. Male. Tegminal venation: costal vein distinct, Rs originate slightly before middle, Rs bifurcate before middle into two forks (stem of Rs slightly shorter than shorter fork of Rs). Stridulatory file of left tegmen distinctly thickened and differently coloured when viewed dorsally; slim and elongated, roundly bent in middle, about 1.9 mm long; with about 107 very densely arranged and evenly spaced teeth ( Fig. 8 C). Abdominal apex as shown in Figs. 8 D, 8E. Tenth abdominal tergite simple, transverse, with posterior margin straight and truncated ( Fig. 8 D). Epiproct small, triangular, broader at base than length, slightly depressed in middle, apex rounded ( Fig. 8 D). Cercus fairly elongated, generally curved gently inwards, tapering to narrow apex with small tooth; apical third feebly sinuate ( Figs. 8 D, 8E). Subgenital plate stout, very broad at base, about as wide as long; narrowing slightly towards apex. Apex of subgenital plate with four projecting lobes: two lateral lobes fairly long and broad and feebly curved outwards, with subacute apex; two straight medial lobes slightly shorter (surpassing middle of lateral lobe) and slightly narrower (base 0.7 times narrower than lateral lobes at base) with acute apex; medial lobes separated from each other by a broad and round emargination ( Fig. 8 E). Genitalia sclerite stout and triangular; forked basally with a wide emargination between both arms; ventral surface with rows of minute teeth, teeth gradually becoming larger apically; apex curved dorsad and subacute ( Figs. 8 F, 8G). Female. Unknown. Colouration (live). White and grey-green in general ( Fig. 7 ). Head with dorsum grey-green, scapus and antennal segments grey-green to pale green; frons (including mouth parts and palps) white, gena white anteriorly and pale green posteriorly. Pronotum generally green with fairly numerous very small, irregularly shaped purple spots; dorsal plate generally darker than lateral lobe. Tegmen with venation grey-green; left stridulatory file thickened and darkened; anal margin yellow brown. Hind wing mostly hyaline, with venation of projecting area grey-green. Thoracic and abdominal tergum pale green with numerous fine purple spots; thoracic and abdominal sternum white. Legs generally pale green with numerous fine purple spots; fine spots more prominent and in higher density on anterior and middle femora, a few large purple spots on posterior femur. Measurements (in mm). BL = 20.4; BWL = 41.0; PL = 5.6; PW = 3.1; TL = 33.1; HWT = 5.3; HFL = 17.8; HTL = 18.6.