Bioacoustics of Asarcogryllacris macilenta

Description. Rather small species. Head: Face narrow ovoid; fastigium verticis little wider than scapus; ocelli visible but little distinct; fastigium frontis separated from fastigium verticis by a very fine suture; subocular furrows weak; transient zone between frons and genae with a faint transverse furrow in middle ( Fig. 40B ). Abdominal tergites two and three each with two rows of stridulatory pegs (5–6, 11–13; 17, 19; n = 1 male , 1 female ). Wings little surpassing hind knees ( Fig. 40A ). Tegmen: Radius with two branches, both forked near tip; media anterior fused in basal area with radius; media posterior also fused in basal area with radius or arises in middle between radius and cubitus anterior from a fusion of short oblique branches from both veins; thus cubitus anterior either single branched and free from base or with a common base with media posterior; cubitus posterior undivided, free throughout; with 3 anal veins. Legs: Fore coxa with a 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 5–8 external and 6–12 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one pre-apical spine; with 3 apical spurs on both sides. Coloration. General color brownish; head reddish brown with 4 indistinct dark brown bands on vertex; pronotum light brown with dark brown rim and two lateral dark brown bands on disc; legs light medium brown with some indistinct darker spots in genicular area. Face brownish with some indistinct lighter and darker patterns. Tegmen semi-transparent white, towards base darkened, in area behind subcosta densely covered with very short brown hairs, giving the area a dark appearance; veins dark brown, only costa and subcosta light yellow; hind wing semi-transparent white, a small spot at anterior apical end of wing covered with short brown hairs; veins and veinlets brown. Male. Eighth abdominal tergite elongate. Ninth abdominal tergite globular, at end with a pair of pincers-shaped projection ( Fig. 41C ). Tenth abdominal tergite reduced to a narrow transverse band sub-interrupted in middle and separated from ninth tergite and from paraproctes by narrow membranous zones. Paraproctes forming large vaulted plates with upper area bent dorsad, below bent area provided with a rather large black horn with subacute tip, the plates from both sides separated by a narrow membranous zone. Subgenital plate wider than long, with triangular membranous area from base; lateral margins convex; apical margin faintly bilobate; styli shorter than subgenital plate, arising from apico-lateral angles ( Fig. 41D ). Female. In the membranous zone between seventh abdominal sternite and subgenital plate with a vaulted glossy plate narrower than sternite, this plate is followed by a constricted membranous area, this area also elevated but less so than preceding plate and provided with a shallow groove on both sides. Subgenital plate simple, bent ventrad in preparation, apical margin convex ( Fig. 41B ). Base of ovipositor normal. Ovipositor short, compressed, in subbasal area curved; tip obtuse ( Fig. 41A ). Measurements ( 2 males , 1 female ).—body w/wings: male 23, female 22; body w/o wings: male 20.5–23.0, female 22; pronotum: male 4, female 3.8; tegmen: male 15.5, female 15; tegmen width: male 4.2; hind femur: male 11, female 11.5; antenna: male 130, female 120; ovipositor: female 7.5 mm .