Dusuna Distant

Dusuna Distant

Dusuna Distant, 1907: 188 Type species: D. mouhoti Distant, originally designated

Description. Body medium sized, yellow to dark brown (Figs 1, 18, 21, 27, 33). Forewing with some transparent areas, one at midlength of corium and others more apically.

Head distinctly narrower than pronotum (Figs 1, 18, 21, 27, 33). Crown shorter than half width between eyes; anterior margin obtusely angulate; coronal suture not distinct, elevated from middle to anterior margin. Ocelli proximate to posterior margin of crown, nearer to each other than to corresponding eye. Face shorter than wide, broadly and distinctly concave between eyes (Figs 3, 19, 23, 29). Clypeal suture distinct; frontoclypeus broadened medially, then tapered apically; anteclypeus strongly convex; genae flat, with mesal margin deeply depressed; lora broad. Antennae short; antennal ledges not distinct. Pronotum round; anterior margin straight, lateral margins broadly angularly produced, posterior margin moderately concave; disc rugose (Figs 1, 2, 18, 21, 22, 27, 28). Forewing extending beyond apex of abdomen with veins reticulate apically; clavus more densely punctate than other areas, some cells depressed and veins A1 and A2 elevated. Hind wings hyaline. Legs short. Fore femur with AM1 and AM2 present but without AV or ic row (Fig. 4). Hind femur with three stout macrosetae at apex (Fig. 5). Hind tibiae flattened with pecten mainly on anterolateral surface; three or four stout anterodorsal (AD) setae with cucullate spine-like bases; other setal rows with several regularly arranged finer setae, those of anteroventral (AV) row with cucullate bases (Fig. 6). First hind tarsomere with several irregularly placed long fine setae ventrally and five platellae apically. Male 8th sternite about one third longer than 7th sternite, posterior margin slightly concave (Fig. 7).

Male pygofer tapering posteriorly, with or without short hooklike process subapically (Fig. 8). Subgenital plates broad, fused at base, tapered to rounded apex, with numerous short setae on ventral surface and row of slightly stouter setae near apical margin (Fig. 9). Aedeagal shaft simple, curved dorsally and cephalad in lateral view, apex membranous, with either a single stout process on one side, a pair of small subapical process asymmetrically placed or processes absent; basal apodeme bifurcate with arms digitate and strongly divergent (Figs 10, 13–16). Style apex hooklike ventrally with few minute setae dorsally (Figs 10, 11). Connective stem short, firmly attached to aedeagus, arms broad platelike; with a high dorsal medial longitudinal keel (Figs 10, 11).

Female with 1st and 2nd valvulae narrow, curved dorsally; 1st valvulae strigate apically and 2nd with two dorsal subapical teeth (Figs 25, 26, 31, 32).

Distribution. China (Hainan; Yunnan; Xizang), Thailand, Malaysia (Perak), Indonesia (Sumatra).

Remarks. The genus Dusuna resembles Eleazara Distant, in having lamelliform produced lateral margins of the pronotum but the latter genus can be distinguished by its larger size, more pustulate body, longer female terminalia and scutellum with medial crest.