Bioacoustics of Ozphyllum

Description.—Male/Female. Size moderate for subfamily in Australia , form robust; both sexes fully winged. Head globular, smooth, occiput somewhat produced, subacute; fastigium of vertex minute, produced, somewhat species distinctive; frons with clypeus and labrum somewhat rough and depressed. Antenna with scape and pedicel normal, not modified; flagellum, normal, thin, extending well beyond tip of abdomen; scrobes produced on internal margins. Eye ovoid, bulging ( Figs. 1 , 2 ). Thoracic auditory structure very large, open, only partially concealed by lateral lobe of pronotum. Pronotum with surface flat, undulating, not shining; surface of disk traversed by a deep sulcus in anterior 1/5, median portion of disk with a distinct U-shaped sulcus; lateral lobe smooth, much deeper than broad, surface somewhat undulating. Prosternum unarmed, mesosternum armed with a pair of moderately large quadrate processes, metasternum with a pair of much smaller processes. Male tegmina ovoid to subquadrate, produced on anterior margin in males; costa absent, subcosta and radius fused and diverging only at apex; stridulatory region species distinctive in degree of sclerotisation, stridulatory vein with a similar secondary vein, mirror absent; stridulatory file ( Figs. 7A–D ), gently arching, teeth lamellar; female tegmen subquadrate, apex obtuse. Fore coxa with a minute protuberance, somewhat spiniform; all other coxae and trochanters unarmed. Fore legs with fore tibia with auditory tympanum open ( Fig. 6E ) on both sides; tibia quadrate in cross section, dorsal surface unarmed, ventral surface with 4–5 minute spines along margins, apex with a much longer spine externally; fore femur subcylindrical, ventral surface flat, margins produced, armed only on anterior surface with a few minute spines. Middle legs longer than fore legs; tibia quadrate, somewhat expanded in proximal portion, dorsal surface flat, margins produced, armed only at apex on posterior margin with a single spine, ventral surface flat, armed on anterior margin with many small spines, one apical in position, posterior margin with 2 spines, one apical in position. Hind legs with femur smooth, without any trace of sculpture, ventral surface with a few minute spines on each side, those near the apex somewhat larger ( Fig. 6D ). Tarsi typical of subfamily, without any trace of plantula ( Fig. 6D ). Genicular lobes of fore and middle femora armed with a pair of minute spines on both sides, hind femur with a much larger pair of spines. Abdomen unmodified: tenth tergite not highly modified, supra-anal plate evenly obtuse ( Fig. 5A ); paraprocts not modified; male cercus elongate, apically species distinctive ( Figs. 5A, B ; 6A–C, E ), female cercus simple, styliform; phallic complex completely unsclerotised; male subgenital plate apically elongate, without styles ( Fig. 5B ), female subgenital plate short, with median incision. Ovipositor short, bud-like. Colour primarily green ( Figs. 1 , 2 ). Head distinctively coloured with genae and frons species distinctive: antenna dark brown, legs green and brown; tarsi dark brown. Tegmina uniformly green except as noted in descriptions below. Thorax often yellow on portions surrounding auditory structure. Abdomen dorsally tawny brown, or yellow, laterally green, each tergite, both dorsally and laterally with purple streaks; ventral surface of abdomen greenish yellow, or reddish brown, lateral portions often brighter yellow.