Bioacoustics of Trichophallus elongatus

Description. Medium sized to smaller species. Tegmina surpassing middle of hind femur. Femora with the following number of spines on ventral margins: fore femur 4–9 external, 3–7 internal; mid femur 6–9 external, 2–5 internal near base; hind femur 9–13 external, 11–16 internal. Male . Stridulatory file 1.38 mm long with about 110 teeth. Tenth abdominal tergite extended behind into two triangular lobes curved ventrad and provided with a distinct raised carina, apex widely excised in between. Epiproct widening backwards with angles little projecting and with a deep pit in middle of dorsal surface, apical margin faintly excised in middle. Cerci long and narrow, slightly curved, apex divided into two branches of which the ventral branch is narrow, conical and slightly longer than the dorsal branch which is compressed and widened. Titillators separate, simple, apex obliquely truncate and somewhat irregular; in prolongation of apices with small membranous sacs that carry on internal surface a row of long bristles, have the ventral angle little projecting, rounded, and granular, and the dorsal angle conically projecting and stiffened at internal side by a long and very narrow, weak sclerite in prolongation of dorsal-proximal angle of titillator apex. Phallus membranes laterally of titillators forming a granular cap. Female. Tenth abdominal tergite distinctly divided in midline. Subgenital plate with entire basal area reduced to an elevated, undulating carina, otherwise membranous; this carina at both sides prolonged into narrow, curved projections that are slightly widened at apex and embracing a circa heart-shaped space. Basal-lateral areas greatly prolonged dorsad, auriculate and separated from subgenital plate by a deep furrow. Ventral ovipositor valves with ventral margin between subgenital lobes with ovoid, setose swellings; their dorsal margins at base with medium sized, rounded projections pointing ventrad and with margin provided with long hairs. Eight abdominal tergite with lateral-posterior area largely excised to almost base but lateral margin again projecting posteriorly. Coloration. Yellowish brown with patterns 1–4. Legs with indistinct maculation; hind femur indistinctly striated, apical area stippled. Measurements.—body: male 18–22, female 21; pronotum: male 4.7–5.2, female 4.9; tegmen: male 28–31, female 30; hind femur: male 13.0–14.5, female 15; antenna: male 65; ovipositor: 12 mm . Etymology. Named for the prolonged ovipositor which is only little widened around mid-length.