A checklist of Tetrigoidea (Orthoptera) from Zuojiang Area, southwestern Guangxi, China, with the description of two new species

In this paper we provide checklist of 26 species of Tetrigoidea ground grasshoppers (Scelimenidae, Metrodoridae and Tetrigidae) from the Zuojiang Area, a natural reserve located near Nanning City in the southwestern Guangxi Zhuang Autonomous Region of southwestern China. In addition, two new species: Coptotettix zaujiangensis sp. nov. and Euparatettix obliqucosta sp. nov. of Tetrigidae are described. Type specimens are deposited at the Institute of Zoology, Shaanxi Normal University, and College of Life Sciences, Nanjing Normal University.


Male
Body small, dark brown, with tubercles. Body length 7 mm; pronotum length 7.5 mm; hind femur length 5.5 mm. Head not projecting above pronotum. The apex of vertex narrow, its width distinctly narrower than the width of an eye; anterior margin of vertex nearly straight, lateral ridge slightly parallel, median carina evident; in profile, vertex and frontal costa forming round shape, front costa slightly concave on median ocelli; width of longitudinal furrow of frontal costa between antennae distinctly wider than width of coax of antennae. Antennae filiform, lying in the lower one-third part between eyes. Eyes globose. Lateral ocelli placed on the upper one-third part between eyes. Anterior margin of pronotum an obtuse angle; median carina present; upper margin of pronotum nearly straight; lateral carinae parallel on the prozona; hind process of pronotum cone-shaped, slightly reaching beyond the distal end of hind femur; humeral angles obtuse angular, part between humeral angles with a pair of parallel abbreviate carinae. Posterior margin of lateral lobes of pronotum with two concavities; posterior angles downward, apex of angles round. Elytra long, ovate. Wings close to the apex of pronotum. Upper margins of fore femur slightly bending, and lower margins straight; midfemur wider and flat, lower margins straight; width of midfemur distinctly wider than the width of visible part. Hind femur short, sharper teeth at right angle. Outer side of hind tibia with 12 spines, inner sides with nine spines. Length of first article of hind tarsus two times longer than the third; the first and second pulvilli below the first tarsus small, tip sharp; the third pulvillus large, tip blunt. Subgenital plate flat cone-shaped.
Body dark brown. Two sides on median carina of pronotum with two bright longitudinal stripes, respectively. Elytra dark brown. Wings black. Outer and sides of hind femur brown, inner side black-brown. Hind tibia brown, apex of the second and third tarsi black.

Female
Unknown. This new species is allied to Coptotettix longjiangensis Zheng and Wei (2000), but differs in: (1) upper margin of pronotum nearly straight in profile; (2) part between humeral angles with a pair of abbreviated carinae; (3) hind process of pronotum slightly reaching beyond the top of hind femur; and (4) wing not reaching the apex of hind process.

Female
Body small, narrow, and slender. Head projecting above pronotum. Vertex narrower, its width narrower than the width of an eye; anterior margin of vertex nearly round, slightly protruding beyond eyes; median carina obvious; in profile, vertex and front costa forming obtuse-rounded shape. Front costa straight before eyes, not concave, protruding as an arch between antennae; width of longitudinal furrow between antennae as wide as width of the coax of antennae. Antennae filiform, located on the lower one-third part between eyes. Eyes globose and projecting. Lateral ocelli placed on the middle of anterior margins of eyes. Anterior margin of pronotum straight; disc of pronotum with thin larger tubercles; median carina evident along its entire length; in profile, upper margin of pronotum undulate before shoulders, and straight behind shoulders; lateral carinae parallel on the prozona; humeral angles round, lateral ridge slightly contracting behind shoulders; part between humeral angles with a pair of slanting abbreviated carinae; hind process of pronotum long, coneshaped, reaching two-thirds the length of the hind femur. Humeral angle approximately arc-shaped. Posterior margin of lateral lobes of pronotum with two concavities; posterior angles slanting downward, apex of angles round. Elytra long ovate, apex round. Wings developed, reaching beyond the apex of pronotum. Fore-and mid-femora slender, their upper and lower margins straight; width of mid-femur distinctly wider than the width of visible part. Hind femur short and strong, antegenicular denticles and genicular denticles sharp. Outer side of hind tibia with eight spines, inner sides with seven spines. Length of first article of hind tarsus longer than the third; the first and second pulvilli below the first tarsus small, tip sharp; the third large, tip blunt. Length of upper valve of ovipositor three times the width, upper and lower ovipositors all with slender teeth. Length of subgenital plate larger than width, with triangle projecting in the middle. Body dark brown. Wings black, hind tibia brown.
This new species is similar to Euparatettix xizangensis Zheng (1992), but differs in: (1) front costa before eyes not concave in profile; (2) part between shoulders with a pair of slanting abbreviated carinae; (3) hind process of pronotum reaching two-thirds of hind tibiae; (4) wings reaching beyond apex of hind tibia; (5) length of upper valve of ovipositor three times its width; and (6) hind tibia brown.