Ectadia apicalis, 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 : 38-39

Ectadia apicalis , new species

(Figs. 1, 6, 17, 20, 23, 26)

Material examined. – Holotype. - male. China: Yunnan Prov.: Tengchong, Dahaoping , 16 Sep.1991 - 17 Sep. 1991, coll. Liu Zhuyao, Yin Haisheng ( MSIE).

Paratypes. – 2 males, 2 females, same data as holotype .

Description. – Male. Size small. Fastigium verticis narrower than the first segment of antennae, sulcate dorsally, not contacting fastigium. Complex eyes approximately round. Pronotom with disc nearly flat; anterior margin slightly concave, posterior margin truncate with small notch in middle; media carina conspicuous; transverse sulcus V-shaped; lateral carina prominent; lateral lobe of pronotum much longer than high, fore margin straight, hind margin obtuse-rounded, ventral margin oblique downward, obtusely crossing hind margin, humeral sinus present but seldom conspicuous. Tegmen surpassing hind wing, with apex gradually acuminated; costal area with irregular venation, C vein undeveloped, Rs vein branching out from behind the middle, confused with M vein; M vein zigzaging from behind the middle and giving off several oblique branches to posterior margin of tegmen (Fig. 1). Stridulatory file comparatively straight but slightly thinner in the middle, with circa 60 densely spaced fine teeth in the basal half area and 9 spaced sparsely spaced large teeth in the apical area (Fig. 6). Anterior coxae without spine, anterior tibiae dorsally sulcate and spinuliferous. All femora ventrally spinulose; posterior femur with 12 spines on ventral margins; posterior tibiae with 21 external spines and 20 internal spines on dorsal margins. The 10 th abdominal tergite prolonged backwards, hind margin emarginate; supra-anal plate quadrate; cerci with stoutest base, basal 1/4 area sharply acuminated, then gradually narrowed till the apex; subgenital plate split for almost apical 2/3, upcurved (Figs. 17, 20).

Colour. Body green, tegmen with brown dots.

Female similar to male except abdominal apex. Supra-anal plate triangular; cerci rather short, conical; ovipositor fairly broad and short, upcurved, both margins denticulate; subgenital plate triangular, apex obtuse-rounded (Figs. 23, 26).

Measurements (length in mm). – Body: male 15.0, female 17.0; pronotum: male 4.5, female 4.0; tegmen: male 21.5, female 20.5; tegmen width: male 5.0, female 3.5; hind wing: male 19.5; post femur: male 19, female 17.5; ovipositor: 6.0.

Etymology. – The name of the new species refers to the gradually acuminate tegminal apex.

Remarks. – Ectadia apicalis resembles E. fulva and E. sulcata in the shapes of the supra-anal plate, cerci and the subgenital plate, but differs from the two species in the smaller size, tegmen with gradually acuminate apex, tegmen longer than

hind wing, the structure of male stridulatory file, and female ovipositor shorter and broader.

Distribution. – China.