Bioacoustics of Caudafistulus

Description. Medium size (body length 14–16 mm ) and robust ( Fig. 1 ). Coloration. The only known species with a predominantly pink body. Head. Space between antennal sockets 1.5 times the wider than the antennal scape ( Figs. 2A, B ); median ocellus conspicuous, occupying much of the space between the antennae, lateral ocelli ovoid, reduced with a diffuse edge ( Fig. 2A ); maxillary palps elongated with the last segment slightly dilated at the apex; labial palpi robust, the last segment noticeably dilated and with rounded apex ( Fig. 2C ). Thorax. Pronotum narrow and smooth, with quadrangular disc and lateral lobes ( Fig. 2B ); humeral notch not developed; auditory spiracle below the lower margin of the lateral lobe of the pronotum and armed with a triangular tubercle, attached on the mesothorax ( Fig. 2C ). Sternum lobes rounded and narrow, without prolongations. Legs. Fore coxa armed with a spine dorsally. Fore and mid femora unarmed; fore and mid tibiae with four spines on each ventral margin and one spine on each side of the ventral-apex ( Fig. 2D ); hind femur robust, ventrally armed; hind tibia armed with spines dorsally only, apex with three spurs on each side, being the mid one the most conspicuous ( Fig. 2E ). Wings. Lanceolate and exceeding the apex of the abdomen and hind femur ( Figs. 1 , 2F ). Abdomen. Stridulatory apparatus absent. Subgenital plate rectangular, with a long posterior border as a tubular shape; styles located on the side edges ( Fig. 2G, H ). Ninth tergite without modification; tenth tergite with two triangular processes, one on each side of the posterior margin ( Fig. 2I ), cerci, and paraprocts without modification or branches ( Fig. 2J ). Phallic complex. Predominantly membranous, with flagellum-like sclerite (TS), and cylindrical plates, sclerosed on each side (AP) ( Fig. 3 ). Female. Tenth tergite without modification, cerci cylindrical and thin, subgenital plate rectangular without modifications, last abdominal tergite with a fold that occupies the entire posterior border; ovipositor longer than the hind femur, gently curving upward, smooth edges, rounded apex.