Bioacoustics of Tryposoma kilomeni

Description male. Colour. Living animals yellow to reddish-brown, dark brown on posterior margins of tergites; hind femora bright yellow in living animals, slightly darkening to yellow-brown on the dorsum and apex ( Fig. 1 ) while preserved animals are of darker brown colour. Body smooth, shining ( Fig. 1 ); Head and antennae . Fastigium verticis laterally compressed where scapus is inserted, lateral ocelli bright white ( Figs. 1 , 4 ), medial ocellus, large and oval, creamy white. Antennae: scape swollen on inner side, 2nd and 3rd units fused, the 3rd elongate, 21–23 basal antennomeres almost bare, others pilose. Mandibles: no ventral process extending ventrad beside labial base in front of lacinia base. Maxillary palps: MP4 comparatively short, little swollen and little pilose. MP5 long and slender, fully pilose. Thorax and legs. As in L. brachyura all nota with narrow marginal rim; ventral edge of mesepipleuron forming a weakly projecting rounded flap. Stridulatory organ: Male: T1–T2 smooth, T3 with 20–30, T4 with 10–15 and T5–6 with fewer than 10 short pegs scattered over lateral surface, remaining tergites laterally without pegs. Pleural surfaces with very few points; adjacent surface of hind femur smooth, lacking spinules or ridges. Coxal spines (on fore and mid coxa) with broad base, pointed. Front leg: coxal inner margin smooth without blunt projection as in L. brachyura ; femur unarmed; tibia with ovoid tympanum on both sides, and slightly swollen nearby with a long, moveable dorsal spine near tympanum; ventrally double row of 4–5 long spines; two pairs of spurs apically of which inner pair longer. Middle leg: Femur unarmed, tibia dorsally with 2 pairs of symmetrical arranged movable spines, apically pair of spurs; ventrally three pairs of symmetrically arranged short spines and apical pair of spurs. Hind leg: femur unarmed, broad at base narrowing to a long almost cylindrical neck, the ventral ridges being reduced; outer surface of hind femur with 14 chevron ridges; tibia with 11–12 pairs of small, sharp fixed dorsal spines, ventral side of hind tibiae unarmed. Apically two pairs of spurs dorsally and ventrally, fully moveable within insertion rings; dorsal subapical pair, shorter with inner spur longer, apical pair very long with inner spur as long as metatarsus ( Fig. 9 ). Ventral pairs shorter with apical pair slightly longer than subapical pair. Prosternum with pair of short cone-like processes. Mesosternum bispinose, spines horizontally compressed, apices bent slightly backwards. Metasternum with thorn-like processes with acute backwards bent tips and a broad laterally compressed base. Abdomen. Cerci: long, thin and narrowing to a sharp, setose apex ( Fig. 1 , 5 C; 6A). Ninth abdominal tergite almost evenly rounded posteriorly, medially sclerotized, rugose; two anteriad oriented processes from posterior margin of 10th abdominal tergite hooked over margin of 9th posterior margin ( Fig. 5 A, C). Subgenital plate medially incised with conical styli ( Fig. 5 E). Female. Habitus as male with long, slightly up-curved ovipositor ( Fig. 7 A). Subgenital plate broadly triangular ( Fig. 7 B), medially with acute point ( Fig. 8 A). Stridulatory organ of female with fewer pegs on T3 and 4 and very few on T5 and 6. Measurements. Male holotype : body length 28 mm , antennae ca. 55 m , pronotum 7.5 mm , hind femur 22.5 mm , hind tibia 21.5 mm ; tarsus 7 mm ; male cerci 5 mm . Female paratype : body length 28 mm ; antennae ca. 55 mm ; pronotum 8.6 mm ; hind femur 26.5 mm ; ovipositor 20 mm .