Bioacoustics of Xiphidiola (Xiphidiola) hokei

Differential diagnosis. This species resembles X. kivuensis (Beier) , but differs in shorter, straight cerci of the male (cerci slightly curved in X. kivuensis ), and shorter tegmina, wich do not reach the apices of hind knees. It also resembles X. pulchra Beier in the length of tegmina, but differs in the shape of the male cerci (cerci evenly tapered, with a small apical hook in X. pulchra . ) From all other species of the genus it differs in the unique shape of the styli (fig. 2I ). Description. General. Body small, slender; macropterous ( Fig. 6 I). Head. Fastigium of vertex triangular, blunt apically, barely reaching base of scapus, flat dorsally; antennae about twice as long as body; frons slightly convex, vertical; eyes globular, moderately protruding. Thorax. Lateral lobe of pronotum wider than high, humeral sinus absent; anterior margin of pronotum flat ( Fig. 6 H); metazona weakly convex; posterior edge of metazona narrowly rounded. Legs. Legs slender. Front tibia unarmed dorsally, with 5 spines on posterior and 4 on anterior ventral margin; tympanum bilaterally open; genicular lobes of front femur unarmed; front femur unarmed ventrally. Mid tibia unarmed dorsally; thickened in proximal 3/4, with 4 spines on posterior and 5 on anterior ventral margin; mid femur unarmed ventrally; genicular lobes of mid femur unarmed. Hind femur unarmed ventrally; genicular lobes of hind femur unarmed. Wings. Tegmen surpassing apex of abdomen but not reaching apex of hind femur; anterior margin straight; hind wing slightly shorter than tegmen. Costal field wide, evenly narrowing towards wing tip; veins Sc and R slightly diverging towards apex of tegmen; vein Rs branching off in middle of tegmen, with 3 apical branches; right stridulatory area with large, fully developed mirror; left stridulatory area with large, fully developed, roughly rectangular mirror ( Fig. 4 S). Stridulatory file elevated on thickened vein, weakly bent, with 89 teeth, 0.86 mm long, 0.04 mm wide ( Fig. 4I ). Abdomen. Tenth tergite unmodified; epiproct unmodified, rounded. Cercus with blunt, finger-like subapical tooth (Fig. 2H), short, straight; apex narrowed, blunt (Fig. 2G); paraprocts unmodified; epiphallus not sclerotized. Subgenital plate narrowly trapezoidal; distal end strongly curved downwards, with small, triangular apical incision; styli laterally flattened, spatulate, parallel (Fig. 2I ). Coloration. Coloration light green; antennae concolorous; eyes uniformly colored; face without darker markings; occiput without markings; pronotum without markings; prozona green; tegmen without markings; hind wing hyaline; genicular lobes of front legs with small, dark patches; hind legs uniformly colored; abdominal sterna and subgenital plate without markings. Measurements ( 1 male ). body w/wings: 16; body w/o wings: 11.5; pronotum: 5; tegmen: 11.5; hind femur: 11 mm .