Bioacoustics of Magnumtergalis

Description. Small-sized (body length 11-12 mm ) and robust ( Fig. 1A , 2A, B ). Coloration. Yellowish-brown ( Fig. 1 ) or black ( Fig. 2 ), varies between species. Head prominent, space between antennal sockets 2.5 times the width of antennal scape ( Fig. 1B , 2C ); ocelli reduced with a diffuse edge; elongated maxillary palps with the last segment noticeably dilated at the apex. Thorax. Pronotum narrow and smooth, with quadrangular disc and lateral lobes; humeral notch undeveloped; auditory spiracle below the lower margin of the lateral lobe of the pronotum and armed with a conspicuous spine ( Fig. 1C, 1A, B ). Legs. Fore coxa without spines, but with a dorsal tubercle. Fore and mid femora unarmed; fore and mid tibiae with four small spines on each ventral margin and one spine on each side of the apex ( Fig. 1B ); hind femur thickened and robust ( Fig. 1D ); distal half of hind tibia with two or three spines on the dorsal-outer margin and two spines on the dorsal-inner margin, apex with three spurs on each side, being the medial spur the most conspicuous. Wings. Ovoid, longer than wide, with a rounded apex and not exceeding the abdomen ( Fig. 1C, 1B ). Abdomen. Stridulatory apparatus present with few denticulations or pegs, located on each side of the third abdominal tergite. Ninth abdominal tergite extending into an elongated and wide hood, covering other structures of the terminalia ( Fig. 1 E-F, 2E-F). Cerci simple without branches. Subgenital plate with a triangular prolongation at the posterior edge; styli present, conical or cylindrical ( Fig. 1G , 2G ). Female. Unknown.