Zethus tansoneus Nguyen & Carpenter, sp. nov

(Figs 24–28)

Holotype, ♂, “ VIETNAM, Tan Son, Mai Chau, Hoa Binh, 1000 m, 14.vi.2008, LTP Nguyen ” [IEBR]. Paratype: VIETNAM: Quang Nam: 1♂, Phuoc My, Phuoc Son, 450 m a.s.l., 2.v.2005, Insect Systematic Department ’ s collectors [IEBR].

Description

Male. Holotype. Body length 11.5 mm; forewing length 10 mm. Structure similar to Z. tumidus sp. nov. but differs as follows: frontal ocelli smaller with diameter 0.7× as wide as antennal socket diameter (Fig. 24). Gena with a longitudinal medial carina running from base to near half the length of the gena. FI proportionally shorter, 1.7× as long as its maximum width, FII longer than wide, FII as long as wide, FIV – IX wider than long, FXI elongate, thinner, proportionally longer, 2.8× as long as it basal width (Fig. 25). Mesoscutum and scutellum in lateral view less convex than in Z. tumidus, almost at same level. Metanotum not projected over propodeum. Medial concave area of propodeum without oblique striae, with some short transverse striae near base (Fig. 26). Metasoma in dorsal (Fig. 27) and lateral view (Fig. 28) as in Z. tumidus .

Distribution. Vietnam: Hoa Binh.

Etymology. The specific name refers to the type locality, Tan Son in Mai Chau, Hoa Binh province of Vietnam.