Bioacoustics of Fiancogryllacris

Description. Small to medium size (body length 12–15 mm ). Coloration. Body ocher, without distinctive spots or stripes ( Figs. 4–7 ). Head. Space between antennal sockets 1.5 times wider than the antennal scape; ocelli yellow, rounded, and small; maxillary palps elongated, third and fifth segment similar in size, fourth segment a little smaller than the previous ones, fifth segment dilated at the apex; labial palpi slim, apex of the last segment noticeably dilated and with rounded apex ( Fig. 4A ). Thorax. Pronotum narrow and smooth, with quadrangular disc, anterior margin rounded, posterior margin almost straight ( Fig. 4B ); lateral lobes rectangular, wider than high, with V-sulcation decided; auditory spiracle below the lower margin of the lateral lobe of the pronotum armed with a conical fold, attached on the mesothorax ( Fig. 4A ). Sternum lobes are rounded and narrow, without prolongations; mesosternum quadrangular with the anterior margin 1.5 wider than the posterior one; metasternum triangular and narrow. Legs. Fore coxa armed with a spine dorsally. Fore and mid femora unarmed; fore and middle tibiae with four medium-sized spurs on each ventral margin and one spur on each side of the ventral-apex ( Figs. 4A, B ); hind femur ventrally armed with 5–6 small and dark spines; hind tibia armed with small spines dorsally, apex with three spurs on each side, being the upper and mid one the longer and similar in length ( Fig. 4A ). Wings. Alar rudiments on meso- and metanotum present. Abdomen. Stridulatory apparatus present on the sides of the first and second tergites. Last tergite is moderately divided dorsally in the middle by a thinner area in comparison to the rest of the segment ( Figs. 4C, D ); posterior margin with a short bifid extension, distally with two spines ( Figs. 4C, E ); on the lateral margins of the posterior margin scapula-shaped, inner rounded, and with a spine, and outer angled ( Fig. 4D ). Cerci almost cylindrical and shorth ( Figs. 4C, D ). Paraprocts and epiproct unmodified. Subgenital plate quadrangular, little divided at apex and without stylli ( Fig. 4E ). Female. Tenth tergite without modification. Cerci cylindrical and thin ( Figs. 4A , 6A, B ); ovipositor almost as long as the hind femur, slightly curving upward, margins smooth, apex slightly pointed ( Figs. 5A, B , 6A, B ). Subgenital plate triangular without modifications, apex rounded.