Bioacoustics of Aphanogryllacris

Description. Small to medium sized species. Head: Face ovoid; forehead nearly smooth with scattered impressed dots; fastigium verticis wider than scapus, separated by a narrow suture from fastigium frontis; ocelli distinct; subocular furrows faint ( Fig. 38J ). Abdominal tergites two and three each with two rows of especially in the last row very tiny stridulatory pegs (3, 9–11; 8, 19; n = 1 female ). Wings not fully covering abdomen and not reaching hind knees ( Fig. 38H ). Tegmen: Radius with RS branching in about mid-length of tegmen, both with additional branches near tip; media anterior free from base but very close to radius in basal half and almost touching it for some distance; just before mid-length dividing into two branches (MA and MP), the posterior branch not reaching tip of tegmen; both cubitus anterior and cubitus posterior single branched and free throughout; with 4 anal veins. Legs: Fore coxa with spine at fore margin; fore and mid femora unarmed; fore and mid tibiae with four pairs of large ventral spines and one pair of smaller ventral spurs; hind femur with 6–7 external and 10–12 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one pre-apical spine each; with 3 apical spurs on both sides. Coloration. General color brown; tibiae of all legs black, only in apical area brown. Face, including fastigium verticis and fastigium frontis, laterally to subocular furrows and ventrally to base of clypeus black, otherwise of general brown color; ocelli yellow. Tegmen semi-transparent, veins dark brown; hind wing semitransparent white; veins light brown. Male unknown. Female. Seventh abdominal sternite unmodified. Subgenital plate separated by a large membranous zone from preceding sternite; at base of membranous zone with a rather large oval groove with stiffened rim; subgenital plate only along margin sclerotised and in middle of apical margin with a small triangular extension, recurved in specimen at hand ( Figs. 38 L–M). Base of ovipositor with small sclerite at base of ventral valves. Ovipositor elongate, slightly upcurved; with gradually approaching lateral margins; tip more strongly narrowing, subacute ( Fig. 38I ). Measurements ( 1 female ).—body w/wings: 29; body w/o wings: 29; pronotum: 5; tegmen: 15; hind femur: 13; tegmen width: 6.5; ovipositor: 14.5 mm .

Description. Small species. Head: Face rather narrow; forehead nearly smooth; fastigium verticis distinctly wider than scapus; ocelli little distinct ( Fig. 38B ). Abdominal tergites two and three each with two rows of stridulatory pegs (>6 spaced,>12 very dense;>10 dense,>14 dense; ( Fig. 38C ). Wings just surpassing hind femur ( Fig. 38A ). Tegmen with reduced parallel veins. Radius with a single posterior branch (RS) arising about in half length of tegmen that forks once near tip (left) or unforked (right tegmen); media and cubitus anterior with common base dividing at about end of basal quarter into M and CuA, before mid-length of tegmen M divides into MA and MP; after RS has arisen from R, it meets in a point (left tegmen) or fuses for about 1 mm (right tegmen) with MA before it frees again; cubitus posterior arises from a very short stem (less than 0.25 mm ) with M+CuA, afterwards free and undivided; with 3 anal veins. Legs: Fore coxa with spine at fore margin; fore and mid femora unarmed; fore and mid tibiae with four pairs of large ventral spines and one pair of smaller ventral spurs; hind femur with small spines on both ventral margins, with 6 external and 7–9 internal spines on ventral margins, increasing in size towards posterior end; hind tibia with spaced spines on both dorsal margins, ventral margins unarmed; with 3 apical spurs on both sides. Coloration. General color brownish (originally conserved in alcohol). Face unicolored pale yellowish brown; compound eyes black. Tegmen yellowish transparent, veins darker; hind wing semitransparent, veins yellow. Male. Ninth abdominal tergite posterior area strongly bent down, deeply furrowed in midline, furrow membranous, at ventral margin on each side of furrow with a narrow, little sinuate process with small acute spine at tip; processes directed laterally and crossing each other in middle ( Figs. 38 D–E, G). Tenth abdominal tergite narrow band-shaped, in middle with a large oval groove. Subgenital plate wide at base with converging lateral margins; styli inserted in about mid of plate length; narrow central part of plate almost as long as styli, with apex slightly bilobate ( Fig. 38F ). Phallus membranous. Female unknown. Measurements ( 1 male ).—body w/wings: 14; body w/o wings: 10; pronotum: 3.5; tegmen: 10; hind femur: 7.5; tegmen width: 3 mm .