Edosa digitata Yang, Wang & Li, sp. nov.

Edosa digitata Yang, Wang & Li, sp. nov.

(Figs 5, 18 k, 48, 77)

Type material. Holotype ♂, CHINA: Pingxincun (24°30΄N, 108°40΄E), Yizhou, Guangxi Zhuang Autonomous Region, 150 m, 16.viii.2011, leg. Shulian Hao & Yinghui Sun, genitalia slide No. YLL11076.

Diagnosis. This new species is similar to E. smithaella Robinson, 2008 by the twisted uncus lobes strongly contorted distally, with melanized apex bearing dense, small nodules, but can be differentiated from the latter by the valva having a digitate and a triangular processes on the inner surface, which are absent in E. smithaella. It is also similar to E. bicolor sp. nov. in having a subtriangular valva and a long not hypertrophied bulbus ejaculatorius, but can be recognized by the uncus lobes strongly contorted distally, which is not contorted in the latter species, and by the absence of the basal process of the valva, which is present in the latter species.

Description. Adult (Fig. 48). Wingspan 12.5 mm in male. Head ochreous yellow. Antenna 0.9× length of forewing; scape dusty yellow, with a few black bristles; flagellum unicolorous, flattened, thicker than other species. Labial palpus with second segment ochreous yellow mixed with darker scales on inner surface, dark brown on outer surface, third segment ochreous yellow, mixed with darker scales on outer surface. Thorax and tegula dark brown. Forewing index 0.28, brown, scales dark-tipped along termen; retinaculum present; cilia grayish brown, with darker tips, with three well-defined cilia lines. Hindwing grayish brown, with a single short, slender evenly curved frenular bristle; cilia grayish brown, dark-tipped in basal 1/3, forming one ill-defined cilia line. Fore and mid legs blackish brown; hind leg yellowish brown, tibia mixed with blackish brown on outer surface.

Pregenital abdomen. In male, first tergum without sclerotization; coremata present in eighth segment, eighth sternite 0.25× as long as wide, without caudal process; eighth tergite quadrate, without caudal process.

Male genitalia (Fig. 77). Vinculum straight on anterior margin, concave in bowl shape at middle on posterior margin; medial process absent from ventrocaudal margin. Tegumen as deep as vinculum, gently concave on anterior margin, slightly convex on posterior margin. Uncus with shouldered base touching each other, forming a small membraneous section with tegumen; uncus lobe 2.0× depth of vinculum, twisted at basal 1/3, distal half with setae externally, distal 1/3 strongly contorted, forming a heavily sclerotized edge along inner margin, apex narrowed and rounded, melanized, bearing dense, small nodules; sclerite absent between uncus lobes. Valva subtriangular, broad at base, narrowed to bluntly rounded apex; costal margin slightly convex in basal half, slightly concave in distal half, unmodified; basal flange absent; ventral margin without ventral lobe; basal margin with inconspicuous ‘secondary apodeme’; inner surface with a small, digitate process at distal 1/3 arising from under costal margin, with a tiny, triangular process near apex. Juxta angled caudally, flat, 0.7× length of aedeagus, heavily sclerotized, bifurcate at its fusion with base of vinculum. Aedeagus 0.8× length of valva, slightly curved ventrad; roundly expanded in basal 2/3, sharply narrowed at distal 1/3, then gently narrowed to pointed apex. Bulbus ejaculatorius 6.0× length of aedeagus, basal 1/6 thick-walled, subdistal section expanded and curved, distal section expanded, broader than subdistal section.

Female unknown.

Distribution. China (Guangxi).

Etymology. The specific name is derived from the Latin digitatus, meaning digitate, referring to the small, digitate process at distal 1/3 of the valva.