Bioacoustics of Microbinthus greensladei

Description. Size small. Head dorsum yellowish brown with 6 irregular brown longitudinal bands as in L. santoensis , 2 median ones, patchy at level of fastigium, 2 lateral ones curved outerly toward eye midlength, 2 most outer ones behind eye and short; dark spots at bases of setae between longitudinal bands. Eyes well protruding, dark brown with a light brown longitudinal band. Fastigium wider than long, setose, yellow, with a dark area posterior to whitish median ocellus; margin between front head and dorsum yellow. Scapes whitish, antennae light brown. Cheeks dark brown posterior to eye, except ventral margin of eyes orange brown ( Fig. 3 D). Face black except a whitish inverted T-shaped pattern, paired whitish spots between antennae and median part of epistomal suture. Clypeus dark brown; palpi whitish, except basis of 3rd segment and apex, dark brown. Pronotum: Dorsal disk slightly trapezoidal, straight posteriorly; yellowish brown with dark brown spots, a faint dark brown band medially, lateral margins yellow, posterior margin with dark brown patterns. Lateral lobes black or dark brown except ventral margin, orange brown ( Fig. 3 D). Legs: Fore and median femora yellowish brown with dark brown spots on dorsal surface, fore and median tibiae brown with a faint darker ring. Hind femora yellowish brown with dark brown striated patterns on dorsal outer faces and dark brown spots on ventral outer faces; knees dark brown; 3–5 black spots on each ventral edge; hind tibiae dark brown, their inner surface with 4 yellow spots above and between spurs; basal and distal parts of tarsomeres III-1 dark brown. Hind tibiae with 5–7 inner (m = 6.3, n = 6) and 8–11 outer (m = 9.5, n = 6) spines above spurs and 3–5 inner (m = 4.3, n = 6) and 4–6 outer (m = 5.7, n = 6) spines between spurs. Tarsomeres III-1 with 3–6 spines on dorsal outer edges (m = 4, n = 2). Abdomen orange brown mottled with dark brown. Cerci homogeneously brown. Male : FW little setose, not reaching abdomen midlength. FW colouration contrasted; cells dark brown, translucent, veins yellowish brown (HT) or brown (male PT); intermedian area strongly sclerotized, whitish. FW venation ( Fig. 1 E): Veins strong, including transverse veins; 1A angle wide (>100°); stridulatory file with 190–195 teeth (m = 193, n = 2). CuP missing. Harp wide, almost flat, with one straight harp vein and without a distinctive rounded area. Distal part of CuA slightly curved inwards, around the median fold. Diagonal vein very strong, prolonged posteriorly by a strong yellow vein connected to MA/MP fusion. Mirror (d1) little differentiated. Apical field restricted to a few cells in E alignment. Lateral field homogeneously dark brown, except translucent area on ventral margin, and intermedian area whitish including cells and transverse veins, the median veins orange brown; with 5 strong longitudinal veins including MA, R and 3 more ventral veins, the most ventral one bifurcated; latero-dorsal angle made by MP; R without strong bifurcating veins. Subgenital plate trapezoidal ( Fig. 4 D), quite short compared to L. villemantae ( Fig. 4 G). Male genitalia ( Fig. 9 A–C): Pseudepiphallic sclerite triangular, slightly convex dorsally; anterior apex slightly indented; posterior apex with individualized lophi, setose, straight and acute at apex. Pseudepiphallic parameres large, trilobate and close together. Ectophallic arc complete, closer to pseudepiphallic parameres than to anterior margin of pseudepiphallus. Ectophallic fold short and wide, with a U-shaped preapical sclerotization. Endophallic sclerite Y-shaped, exceeding anterior margin of pseudepiphallus, convex dorsally, its posterior apex with a median expansion; endophallic apodeme made of lateral lamellas and a narrow median crest. Female: FW short ( Fig. 6 B), exceeding posterior margin of first tergite, not overlapping. FW colouration contrasted dorsally, cells dark brown and veins yellowish brown; dorsal field with 6–7 strong longitudinal veins and sclerotized transverse veins. Lateral field dark brown with 3–4 strong longitudinal veins. Ovipositor slightly shorter than hind femora; apex lanceolate, brown, faintly denticulate on dorsal edge ( Fig. 7 B). Female genitalia: Copulatory papilla ( Fig. 8 D–F) concave ventrally, not sclerotized except a basal ring. Juvenile: unknown. Variation: Specimens from San Cristoval Is. (2Ƥ, 13) have a more homogeneous dark brown colouration and show very slight differences in male FW venation and male genitalia. Measurements. see Table 1 . Habitat and life history traits. unknown. Behaviour. unknown.