Bioacoustics of Papuogryllacris diluta

Description. Medium large species. Head: Face ovoid; forehead with impressed dots and very fine transverse riffles (formerly conserved in alcohol); fastigium verticis about as wide as scapus, separated by a distinct transverse suture from fastigium frontis; lateral ocelli small, of light color; median ocellus roughly triangular, orange; subantennal furrows and subocular furrows distinct ( Fig. 94B ). Abdominal tergites two and three each with two rows of stridulatory pegs (4, 9; 11, 15; n = 1). Wings surpassing hind knees ( Fig. 94A ). Tegmen: Radius with two branches, both forked in apical area; on right tegmen media anterior free from base, single-branched but with a short connecting branch to CuA1; cubitus anterior at base with a single branch that forks into two veins, the anterior branch makes a curvature and receives an oblique connection vein from MA, shortly after it divides again into two parallel branches, MP and CuA1, while the posterior branch (CuA2) does not divide further; cubitus posterior undivided, free throughout; with 4 anal veins. Left tegmen with somewhat deformed veins from basal quarter to middle of tegmen probably due to problems during final moult; on this tegmen MP branches from MA that runs zig zag in that point; CuA1 arises from CuA stem at a point where the curvature of the vein had ended, it then closely approaches MP and afterwards the three veins run in equal distance. Legs: Fore coxa with a spine at fore margin; fore and mid femora unarmed; fore and mid tibiae with 3 pairs (on mid tibia 2 or 3 pairs) of large ventral spines and 1 pair of smaller ventral spurs; hind femur with 8–11 external and 13–14 internal spines on ventral margins (basal spines very small); hind tibia with spaced spines on both dorsal margins, ventral margins without pre-apical spine; with 3 apical spurs on both sides. Coloration. General color light brownish with indistinct marks on pronotum. Face maroon; fastigium frontis, lower part of clypeus, upper area of labrum and bordering areas of mandibles of lighter color. Tegmen yellowish semi-transparent; veins and veinlets yellow, darker towards base; hind wing semi-transparent white; veins yellow, towards base brown; cross-veins greyish. Male unknown. Female. Seventh abdominal sternite distinctly shorter than preceding sternites, with a medial furrow. In the intersegmental membrane before subgenital plate with a small oval pit with stiffened tubercle at both sides. Subgenital plate large, in about proximal two thirds ventrally swollen and with convex lateral margins, in about apical third flat with straight converging lateral margins; apical margin wide, truncate with rounded lateral angles ( Figs. 96 B–C). Ovipositor long, faintly curved, nearly substraight; tip subacute ( Fig. 96A ). Measurements ( 1 female ).—body w/wings: 35; body w/o wings: 27; pronotum: 7.0; tegmen: 28.0; tegmen width: 8.5; hind femur: 18.0; ovipositor: 23 mm .

Description. Medium large species. Head: Face ovoid; forehead with impressed dots and very fine transverse riffles (formerly conserved in alcohol); fastigium verticis about as wide as scapus, separated by a distinct transverse suture from fastigium frontis; lateral ocelli small, of light color; median ocellus roughly triangular, orange; subantennal furrows and subocular furrows distinct ( Fig. 94G ). Abdominal tergites two and three each with two rows of stridulatory pegs (4, 9; 11, 15; n = 1 female ; Fig. 95F ). Wings surpassing hind knees ( Fig. 94F ). Tegmen: Radius with two branches, both forked in apical area; ♀ 1: Media anterior free from base, single-branched but with a short connection branch to CuA1; cubitus anterior at base with a single branch that forks into two veins near end of basal third, the anterior branch makes a curvature and receives an oblique connection vein from MA and shortly after divides again into two parallel branches, MP and CuA1, while the posterior branch (CuA2) does not divide further. Cubitus posterior undivided, free throughout; with 4 anal veins. Legs: Fore coxa with a spine at fore margin; fore and mid femora unarmed; fore and mid tibiae with 3 pairs (on mid tibia 2 or 3 pairs only) of large ventral spines and 1 pair of smaller ventral spurs; hind femur with 8–11 external and 13–18 (basal very small) internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins without pre-apical spine; with 3 apical spurs on both sides. Coloration. General color light brownish with indistinct marks on pronotum. Face maroon; fastigium frontis, lower part of clypeus, upper area of labrum and bordering areas of mandibles of lighter color. Tegmen yellowish semi-transparent; veins and veinlets yellow, darker towards base; hind wing semi-transparent white; veins yellow, towards base brown; cross-veins greyish. Male. Ninth abdominal tergite with a pair of narrow black hooks from below ventral margin. Tenth abdominal tergite band shaped, interrupted in midline. Subgenital plate wider than long, from apical margin with a narrow projection little widening towards convex apex, that is very faintly incised in middle ( Fig. 95E ). For general description see Karny (1928a) . Female. Seventh abdominal sternite shorter than preceding sternites, with basal margin convex, especially in middle. Intersegmental membrane between seventh sternite and subgenital plate provided with a pair of small bean-shaped sclerotizations with medial furrow. Subgenital plate short pear-shaped with strongly upcurved lateral margins; apical margin slightly convex ( Figs. 96 H–I). Ovipositor long, faintly curved, nearly substraight; tip subacute ( Fig. 96G ). Measurements ( 1 female from Baiteta only).—body w/wings: 38; body w/o wings: 28; pronotum: 6.5; tegmen: 31.5; tegmen width: 10.0; hind femur: 19.5; ovipositor: 25 mm .