Larnaca Walker, 1869

Bian, Xun, Guo, Li-Ying & Shi, Fu-Ming, 2015, A new record of Larnaca Walker, 1869 (Orthoptera: Gryllacrididae: Gryllacridinae) from China with description of a new species, Zootaxa 3994 (2), pp. 292-294 : 292-293

Genus Larnaca Walker, 1869

Larnaca: Walker, 1869 . Catalogue of the Specimens of Dermaptera Saltatoria in the Collection of the British Museum, 1:190; Gorochov, 2003. Entomologicheskoe Obozrenie, 82(3): 643.

Diagnosis. Body moderate, robust, black to dark brown. Occiput smooth or with inconspicuous spots; fastigium verticis wider than scape. Antennal scape elongate, with a swelling on internal margin near base. Eyes prominent; median and lateral ocelli conspicuous. Anterior margin of pronotum slightly projecting, posterior margin truncate. Meso- and metasternum rounded, not or scarcely lobed. Tegmina usually much longer than pronotum and not reaching apices of hind femora, black or yellowish brown, veins reduced, blackish or darker than the cells; R vein usually simple, sometimes simply forked close to tip; Rs arising from radial stem about the middle, usually simple or arising before the middle then forked again; M vein simple, not united with R vein at base of tegmina; Cu vein simple, free. Hind wings reduced or absent, hyaline or a little somky; Rs+M with simple. Fore coxae with a small, sharp spine. Fore and middle unarmed on ventral surface, hind femora with outer spines on ventral surface. Fore and middle tibiae with 4 pairs of long and developed moving spurs on ventral surface, of the basal spurs slightly longer than apical ones; apices of middle tibiae unarmed or with 1 apical spur on inner margin. Hind tibiae with 2 rows of spines on dorsal surface and 1–2 inner spines on ventral surface. Male. Abdomen without stridulatory area. Ninth abdominal tergite obviously projecting backwards, with 1 pair of heavily sclerotized crossed hooks; bases of hooks with mobile rounded convexities, apex acute; cerci styliform. Subgenital plate broad, subapical area with normal and clearly developed styli. Female. Copulatory depressions situated on the apical area of seventh abdominal tergite. Apical area of subgenital plate not bent forwards and downwards. Ovipositor as long as or shorter than hind femora, strongly bent upwards, dorsal and ventral margin s smooth.

Distribution. China, Indonesia, Malaysia, Thailand, Vietnam.

FIGURE S A–D. Larnaca (Larnaca) emarginata Bian, Guo & Shi , sp. nov. male: A. head in frontal view; B. pronotum and tegmina in dorsal view; C. apex of ninth abdominal tergite in apical view; D. subgenital plate in ventral view. Scale bars: = 1mm.