Ashibusa biniprocessa Li, sp. nov. urn:lsid:zoobank.org:act: D202C009-934C-4477-A857-B167FD3457C6 (Figs 5, 13) Type material. CHINA, Sichuan: Holotype ♂, Shaoyaogou, Anzihe, Chengdu City (30.78°N, 103.20°E), 1598 m, 22.VI.2016, leg. KJ Teng & XF Yang, slide No. ZD 21454. Diagnosis. The new species can be distinguished from its congeners by the dark brown forewings having a subtriangular orange yellow costal patch, in the male genitalia by the right brachium of the socius with two dorsal processes, and the left brachium and the phallus both with a flat apex. Description. Adult (Fig. 5). Wingspan 16.0 mm. Head. Vertex and frons white, vertex pale yellow laterally. Antennae pale yellow, scape mottled with brown scales, flagellum alternated with dark brown on dorsal surface. Labial palpi white, except third palpomere yellow mixed with brown ventrally, distal 1/4 brown dorsally. Thorax. Dorsum of mesothorax white, with diffused yellow and brown scales; tegulae brown mixed white and yellowish brown. Forewings dark brown, with white scales at base and a few white scales at lower corner of discal cell, with orange yellow scales from 1/3 to 1/2 along posterior margin of cell; white fascia extending discontinuously from basal 1/4 of costal margin to dorsum; subtriangular orange yellow patch from between costal 1/4 and 3/4 narrowed to 1/2 width of wing, edged with a few white scales posteriorly; small cream spot at distal 1/5 of costal margin; fringes black, mixed with yellow along costal margin. Hindwings and fringes deep brown. Fore- and midlegs with coxae white, femora white in basal half and yellow in distal half, tibiae white alternated with yellow, tarsi yellow except first tarsomere white at base; hindleg with femur white, tibia with whorls of bristles black alternated with white, tarsus yellow with brown scales on outer surface, white on inner surface. Male abdomen and genitalia (Fig. 13): Male abdomen. Pleural lobes of eighth segment 2/3 length of valva. Male genitalia. Socius with right brachium broad at base, narrowed to basal 1/4, obtusely produced between basal 1/4 and 3/4, narrowed from distal 1/4 to hook-shaped apex; two dorsal processes subequal in size, short, thorn shaped, one arising from 1/2, the other from 3/4. Left brachium half length of right brachium, basal half nearly uniform, shallowly concave at 1/3 laterally; distal half slightly narrower, flat at apex. Valvae club shaped, basal 4/5 uniformly wide, distal 1/5 inflated elliptically, slightly extending outward, with dense setae in distal 1/3 ventrally. Left valvella slender, 3/4 length of phallus, narrowed to distal 1/6, distal 1/6 broadened ovally; right valvella reduced. Phallus uniformly wide, bent at middle, with flat apex. Female unknown. Distribution. China (Sichuan). Etymology. The specific epithet of the new species is derived from the Latin bini- and processus, referring to the two dorsal processes on the right brachium of the socius in the male genitalia.

Published as part of Zhang, Di & Li, Houhun, 2023, A taxonomic review of the genus Ashibusa Matsumura, 1931 (Lepidoptera: Cosmopterigidae) from China, pp. 265-281 in Zootaxa 5380 (3) on pages 269-271, DOI: 10.11646/zootaxa.5380.3.4, http://zenodo.org/record/10224515