Tetricodes Fennah, 1956

Zhang, Zhengguang & Chen, Xiangsheng, 2009, Review of the oriental Issid genus Tetricodes Fennah (Hemiptera: Fulgoroidea: Issidae) with the description of one new species, Zootaxa 2094, pp. 16-22 : 17

Tetricodes Fennah, 1956

Tetricodes Fennah, 1956: 513 .

Type species. Tetricodes polyphemus Fennah, 1956: 513 , fig. 23, A–D, by original designation.

Description. Body length (from apex of coryphe to tip of forewings): ♁ 5.0–7.0 mm, ♀ 6.0–7.0 mm.

Coloration. Body brown, with greenish patches. Coryphe jade-green. Eyes brown. Metope dark brown with black protuberance near base. The circumambience of protuberance light brown. Lateral margins of metope with light brown verrucas. Clypeus and rostrum brown with light brown marks. Antenna pale brown. Pronotum jade-green and mesonotum pale brown. Forewings yellowish brown with greenish spots, hindwings dark brown. Legs brown with dark brown spots or stripes. Abdomen ventrally pale brown with pale greenish.

Head. Coryphe ( Figs 1, 11) sagittate, disc sloping down to middle line, wider than long (1.7–1.9:1), without median keel, anterior margin angulately convex, posterior margin angulately concave. Metope ( Figs 2, 12) longer than wide (1.3–1.4:1) with a hemispheroidal protuberance near base, basal margin slightly concave, lateral margins raised. Median keel only present at base. Rostrum slightly surpassing mesotrochanters.

Thorax. Pronotum ( Figs 1, 11) short, extremely narrow behind eyes, in midline slightly longer than vertex (1.5–1.7:1). Anterior margin of pronotum strongly protruding, acutely angulated, posterior margin almost straight. Scutellum ( Figs 1, 11) triangular, with median groove and very weak lateral keels. Forewing ( Figs 4, 13) 2.4–2.6 times longer than widest part, acutely rounded at apex. Costal margin of forewing concave near the base of abdomen. Sc and R convergent near base, M bifurcate in basal part, Cu simple reaching to apex. Hindwing ( Figs 5, 14) well developed, same length as forewing, bilobed, without anal lobe. Hindwing with distal margins overlapping, with a network of veins. Between remigium and vannus a deep notch present. Hind tibia with 2–3 lateral teeth. Spinal formula of hind leg 8-8-2.

Genitalia. Pygofer ( Figs 6, 15) narrow, hind margin convex. Anal segment ( Figs 7, 16) short, approximately oval or triangular, lateral margins turned down. Anal foramen near middle. Aedeagus ( Figs 9, 10, 17) laterally with foliaceous processes near apex, without ventral hooks, laterally with finger-like processes. Genital styles ( Figs 8, 18) in lateral view oval, with hook-shaped process in middle of dorsal margin.

Host plant. Unknown.

Distribution. Oriental region ( China: Hubei, Guizhou, Yunnan).

Remarks. The structure of the forewings (beetle-like, convex, elongate, and apically narrowed, with a network of crossveins) and hindwings (well-developed two-lobed hindwings, with a deep notch between remigium and vannus) place this genus in the tribe Parahiraciini . This genus is related to Neodurium Fennah , which was transferred to Parahiraciini from Thioniini by Zhang and Chen (2008), and Flavina Stål , but differs in the metope, with a hemispheroidal protuberance near base, without median carina, and the aedeagus without any hooks ventrally. This genus is distinguished from other genera of Parahiraciini by the lack of a well-developed metopial proboscis.