Brevipenna falcata Shi & Bian 2016, sp. nov.

Brevipenna falcata Shi & Bian sp. nov. (Figs. A–O)

Description. The following characters are in addition to those given in the generic description. Fastigium verticis narrow, width about half as long as scape, dorsal surface with 1 shallow median furrow. Occiput with 1 weak longitudinal carina. Eyes elongate, as long as scape. Median ocellus oval, lateral ocelli nearly circular (Fig. A). Antennal scape elongate, with a swelling on internal margin near base; pedicel about half as length of scape; first segment of flagellum as long as scape. Anterior margin of pronotum nearly straight, posterior margin slightly projected; ventral margin of lateral lobes weakly undulating, posterior margin almost oblique. Prosternum with 1 pair of spine-shaped processes, basal area of these processes wider and nearly jointed; mesosternum with 1 pair of triangular process, the internal margin nearly straight, external margin only straight as far as in middle; and metasternum with 1 pair of long acute-triangular processes, the internal margin straight, external margin oblique, basal area separate (Fig. B). Apices of tegmina obtusely rounded (Figs. C–D). Fore tibiae with 1 inner spine on dorsal surface; dorsal surface of middle tibiae with 3 spines on internal margin, external margin with 2 spines. Ventral surface of hind femora with 3 inner and 3–5 outer spines; dorsal surface of tibiae with 9–10 pairs of spines, ventral surface with 1–3 pairs of smaller spines. Posterior margin of ninth abdominal tergite almost straight, lateral margin with 1 pair of small semicircular lobes; tenth abdominal tergite with 1 pair of sclerotized hooks (Fig. F). Paraproct with 1 pair of depressed processes, apical areas falcate, apices acute (Fig. G). Cerci obvious longer than the processes of paraproct, apical area directing inwards (Fig. E). Subgenital plate longer than wide, basal margin nearly straight, posterior margin slightly concave in the middle. Styli conical, apices subacute (Fig. H).

Female. Differs from male in following characters: size larger than male. Cerci long, apices subacute (Fig. O). Basal half of subgenital plate triangular, basal area broad, sharply narrower in middle, then forming a long, gradually narrowing process (Fig. N). Ovipositor slightly shorter than hind femora, dorsal and ventral margins smooth, dorsal valvuale obviously shorter than ventral ones (Fig. O).

Coloration. Body black brown, with some yellow spots. Ocelli yellow. Legs yellowish brown, genicular lobes of hind femora black.

Measurements (mm). BL: ♂ 16.5–17.5, ♀ 21.5; PL: ♂ 7.0–7.0, ♀ 7.2; TL: ♂ 6.5–6.8, ♀ 6.5; HFL: ♂ 19.0–21.0, ♀ 19.5; Ov: 16.6.

Examined material. Holotype: male, Xueshanhe, Yangbi, Yunnan, elev. 2000–2800 m, 8 June, 2004, coll. by Weifang Ding. Paratypes: in addition to the holotype there is one male and one female bearing the same data; one male, Wuliangshan, Yunnan, elev. 2000m, 17 July, 2003, coll. by Benyong Mao.

Distribution. China (Yunnan).

Etymology. The name of the new species refers to the shape of processes of male paraproct.

Remarks. The new species differs from A. tonkinensis (Rehn, 1906) in: body small; left and right wings overlapped (Figs. C, L); processes of metasternum acute-triangular, the internal margins almost straight, external margins oblique (Figs. B, J); and pterothoracic and abdominal tergites without short longitudinal ridges. The body size of A. tonkinensis (Rehn, 1906) is about 38.0–46.0 mm for male and 34.0–42.0 mm for female (Gorochov, 1998).