Promalactis spiniflagellata Wang, sp. nov.

(Figs 11, 26)

Type material. CHINA, Guangxi Zhuangzu Autonomous Region: Holotype ♂, Shaoping Linchang (22.09°N, 106.94°E), Pingxiang, 280 m, 28.III.2012, coll. Xiaofei Yang, slide No. JYY17526. Paratypes (4♂): 3♂, 25.III.2012, other same data as holotype, slide No. JYY17527 ♂; 1♂, 1.IV.2013, other same data as holotype .

Diagnosis. This new species is characterized by having a torch-shaped juxta with a S-shaped lateral process. It is closer to P. bicornea sp. nov., and differences between them are stated in the preceding species.

Description. Adult (Fig. 11) wingspan 7.5–8.0 mm. Head creamy white, mixed with greyish brown scales on frons and occiput. Labial palpus white; second segment black on outer side except white at apex; third segment black at base and before apex. Antenna with scape white on ventral surface, blackish brown on dorsal surface; flagellum black on ventral surface, yellowish white and black on dorsal surface. Thorax and tegula blackish brown. Forewing ground color golden yellow, with blackish brown scales basally; costal margin with a wide black streak extending from base to antemedian fascia; with two wide blackish brown fasciae mottled white scales: antemedian fascia narrower, from beyond basal 1/3 of costal margin straight to dorsum, its outer margin edged with sparse white scales; postemedian fascia broad, from distal 1/3 of costal margin straight to end of fold, widened anteriorly; distal patch blackish brown, enlarged at apex, slightly narrowed along termen to meet postemedian fascia; cilia golden yellow mixed with blackish brown. Hindwing and cilia yellowish grey. Fore- and midlegs black ventrally except whitish yellow at apices of tibiae and each tarsomere, yellowish white dorsally; hindleg greyish yellow except blackish brown at apices of tibia and each tarsomere.

Male genitalia (Fig. 26). Uncus large, wide at base, slightly narrowed to a rounded apex, with a small cut at middle of apex. Gnathos digitate, heavily sclerotized, less than half length of uncus; lateral arms wider, weakly sclerotized. Tegumen divided from posterior 2/5, anterior 3/5 elongate triangular, rounded apically, sclerotized along edges. Valva with basal 2/3 sub-rectangular, distal 1/3 narrowed and produced to a large spine directing dorsad; costa produced beyond middle, concave distally, with a slender process at distal 1/4. Saccus broad triangular, almost as long as uncus, narrowed to apex. Juxta torchlike; lateral process arising from distal 1/3, spinous, flagellate, curved in S shape, extending to before apex of valva; basal lobe reaching posterior 2/5 of saccus. Aedeagus slender, narrowly rounded at apex, shorter than valva; cornutus absent.

Female unknown.

Distribution. China (Guangxi).

Etymology. This epithet is derived from the Latin spin- and flagellatus, referring to the lateral process of the juxta.