Busonia lactata Xue & Zhang, sp. nov.

(Figs. 1 I–L, 4A–E)

Description. Length (including wings): male 3.3–3.5mm.

Crown ochraceous; face mainly yellowish-white, lower part light ochraceous, anteclypeus and gena white, ocelli hazel (Figs. 1 K, L). Pronotum and mesoscutum dark brown, lateral margin yellowish; scutellum light yellow. Forewing hyaline with brown tinge, broad band along costa except for a subapical semi-heart-shape, black (Fig. 1 J). Mesepimeron brownish. Legs and hind leg macrosetae yellowish-white.

Male genitalia. Pygofer broad, with height more than length. Appendage of segment X slender, at 1/4th curved posteriorly, hook-like, in posterior view crossing over each other. Subgenital plate narrow, with a few hair-like seta on dorsal margin (Fig. 4 A). Connective similar to Busonia fusca sp. nov. . Style with angular process and a few setae on ventral margin. Aedeagus dorsal margin broad, concave, shaft tapering apically in lateral view; shaft apex rounded, broadened subapically, compressed subbasally in ventral view (Figs. 4 D, E).

Etymology. The specific epithet refers to the milky-coloured face.

Material examined. Holotype: ♂, THAILAND, Kamphaeng Phet Mae Wong NP Chong Yan, N16°5.212′ E99°6.576′, 2008-iii-17-24, coll. Piluek C, Malaise trap (QSBG); Paratype: 1♂, THAILAND, Kamphaeng Phet Mae Wong NP Chong Yen N16°5.212′ E99°6.576, 1306m, 2008-iii-17-24, coll. Piluek C., Malaise trap (QSBG); 2 ♂♂, THAILAND, Kamphaeng Phet Mae Wong NP Chong Yen N16°5.968′ E99°6.472′, 1306m, 2007-xii-1-3, coll. Chumpa Piluk & Aram Inpuarg, Malaise trap (INHS).

Remarks. B. lactata sp. nov. has the aedeagal shaft similar to that of B. micrata sp. nov. (see below), but can be distinguished from the latter by the face being yellowish-white and scutellum light yellow, and the aedeagus broadened subapically and compressed subbasally in ventral view.