Bioacoustics of Marthogryllacris sequestris

Figs. 20–21 Description. Body large. Face with scattered impressed dots. Fastigium verticis wider than scape, fastigium frontis separated from fastigium verticis by a fine suture ( Fig. 20A ). Ocelli distinct, median ocellus obviously larger than the lateral ocelli. Anterior margin of pronotum projected in the middle, posterior margin arched; lateral lobes longer than deep, anterior angle widely rounded, posterior angle rounded ( Fig. 20B ). Fore coxae with 1 spine. Fore and middle femora unarmed, hind femora with 19–20 internal and 10 external spines on ventral surface. Fore and middle tibiae with 4 pairs of spurs and 1 pair of apical spurs on ventral surfaces; hind tibiae with 6–7 pairs of spines and 1 pair of apical spurs on dorsal surface, ventral surface with 1 subapical and 2 apical spurs on each side. Tegmina surpassing the ninth abdominal tergite and slightly reaching the apical third of hind tibiae ( Fig. 21A– B ). Tegmina ( Fig. 21C–D ): radius releases RS little before middle area of tegmen, both forked; media anterior free from base; cubitus anterior at base single branched, makes a curvature and receives a short connection branch from MA, then again divides into MP and CuA; cubitus posterior undivided, free throughout; with 4 anal veins, the last two with short common stem. Second and third abdominal tergites without stridulatory pegs ( Fig. 20D ). Eighth abdominal tergite prolonged and curved downwards ( Fig. 20E ). Ninth abdominal tergite with deep furrow along the midline, on both sides with a globular swelling that has a short black spine on ventral margin, in situ crossing each other just behind base ( Fig. 20G ). Cerci slender, apices subacute. Subgenital plate wider than long, lateral margins convex, posterior margin angularly concave ( Fig. 20H ). Styli stout, inserted on the apico-lateral angles. Female. Unknown. Coloration. Body yellow brown. Genae, mandibles and ventral area of labrum black ( Fig. 20A ). Pronotum with a pair of black stripes which extending the anterior margin of lateral lobes ( Fig. 20B ). Tegmina semi-transparent yellowish, towards base darker. Spines of all tibiae black or slightly lighter. Measurements (mm). Male: BL 36.0, PL 7.0, TL 31.0, HFL 19.0.