Ectadia obsolescens, Chun-Xiang & Le & Xian-Wei, 2004

Chun-Xiang, Liu, Le, Kang & Xian-Wei, Liu, 2004, The Genus Ectadia Brunner Von Wattenwyl (Orthoptera: Tettigoniidae: Phaneropterinae), With Descriptions Of Three New Species From China, Raffles Bulletin of Zoology 52 (1), pp. 37-43 : 39-42

Ectadia obsolescens , new species

(Figs. 4, 9, 12, 15, 18, 21)

Material examined. – Holotype. – male, China: Yunnan Prov.: Menglongbanna, Mengsong , 1600mm, 22 Apr.– 22 May.1958, coll. Pu Fuji ( IZAS).

Paratypes – China: Yunnan Prov.: 5 males, 10 females, same data as holotype ( IZAS) ; 1 male, same data as holotype ( ZRC) ; 1 male, 1 female, Xishuangbanna, Damenglong , 650mm, 22 Jul.1958, coll. Hong Chunpei ( IZAS) ; 1 male, 3 females, Xishuangbanna, Menghun , 1200 – 1400mm, 21 May.1958, coll. Zheng Leyi, Hong Chunpei & Meng Xuwu ( IZAS) .

Description. – Male. Size, shape of body, comparison between tegmen and hind wing and shape of tegmen similar to Ectadia fulva , but different from it as follows. Stridulatory file slightly curved; circa basal 1/4 area with 10-15 moderately spaced large teeth, middle 2/4 area with about 110 densely spaced minute teeth, apical 1/4 area commonly undeveloped without or with 1-4 widely spaced irregular large teeth (Figs. 4, 9, 12). The whole area of the stridulatory apparatus of right tegmen much smaller, its scraper cambered, relatively wider area situated more distally than the main structure of the stridulatory apparatus, proximal area between MA and MP+CuIA, nearly transparent without any veinlets (Fig. 15).

Figs. 1-13. Ectadia species. 1, 6, E. apicalis , new species; 2, 7, E. sulcata ; 3, 8, 11, E. fulva ; 4, 9, 12, E. obsolescens , new species; 5, 10, 13, E. sinuata , new species. Lateral view of left tegmen (1-5); male stridulatory file on the underside of left tegmen (6-10); male stridulatory area of left tegmen (11-13) (Scale bar = 1 mm).

Figs. 14-28. Ectadia species. 17, 20, 23, 26, E. apicalis , new species; 24, 27, E. sulcata ; 14, 25, 28, E. fulva ; 15, 18, 21, E. obsolescens , new species; 16, 19, 22, E. sinuata , new species. Male stridulatory area of right tegmen (14-16); dorsal view of male abdominal apex (17- 19); lateral view of male abdominal apex (20-22); lateral view of female abdominal apex (23-25); female subgenital plate (26-28) (Scale bar = 1 mm).

Abdominal 10 th tergite slightly prolonged backwards, lateral margins convex, hind margin truncate, with a longitudinal furrow on dorsal surface. Supra-anal plate nearly semicircular, lateral margin arcuate, hind margin truncate. Cerci rather stout in the basal 1/3 area, then sharply acuminate, yataghanshaped; Subgenital plate split for almost apical 1/2, upcurved (Figs.18, 21).

Colour. Lightly yellowish green (maybe more or less green in life). Tegmen with distinctly moderate brownish dots in cells of the radial area and numerous very small dots in the medial and cubital areas.

Female green, similar to male except wings and abdominal apex. Hind wing slightly surpassing the apex of tegmen. Supra-anal plate triangular; cerci rather short, conical; ovipositor short, upcurved, both margins denticulate; subgenital plate triangular, apex obtuse-rounded. Tegmen with indistinct very little dots.

Measurements (length in mm). – body: male 14.5 – 18.0, female 22.0; pronotum: male 3.1 – 3.8, female 3.9; tegmen: male 22.7 – 26.5, female 20.6 - 24; width of tegmen: male 6.5, female 3.5; hind wing: male 17.5 – 19.8, female 23; hind femur: male 17.5 – 20.5; female 19.0; ovipositor: 6.0.

Variation. – One male specimen with undeveloped left hind wing, 1/3 as long as left tegmen; Some male specimens with median femora unarmed on ventral margin.

Etymology. – The name of the species refers to the stridulatory file with the irregular, obsolescent apical area.

Distribution. – China.