(92) Nemophora yajiagengensis Liao, Hirowatari & Huang, sp. nov.

(Plates VIII-9, XX-1)

LSID urn:lsid:zoobank.org:act: 95F9F6BB-3F05-40FD-8C61-F7E7A660D0BE

Diagnosis. This species is similar to N. congruella (Zeller, 1839) in the forewing pattern, but it can be easily distinguished by the following characters: the longitudinal striae of the forewing base do not reach the central fascia, while connecting with the central fascia in N. congruella; the both sides of the forewing central fascia are relatively straight, while wavy in N. congruella; and the subapical radial striae are black and narrow except the middle one broad, while uniform in size in N. congruella .

Description. Male. Forewing 7.6–7.7 mm; wing expanse about 16.1 mm.

Vertex covered with brown hairs; face with smooth brown scales. Eyes very small, far away to each other dorsally; eye size index about 0.46. Labial palpus short, covered with brownish scales and black hairs; galeae with yellow scales laterally. Antenna slender, black, 24.8–25.0 mm, about 3.2 × forewing length. Legs yellow except apical tibiae and tarsi blackish; hind tibiae with yellow to brown long hairs. Thoracic dorsum and tegula black. Forewing lanceolate, ground color pale yellow; basal 2/3 with four black-margined silver-gray longitudinal striae placed at costal, radial, median and postcubitus veins, not reaching to central fascia; and two black lines placed between them; middle part with two black-margined silver-gray transverse fasciae separated a yellow transverse broad band; subapical area with 10 black radial striae reaching outer margin and a silver-gray spot between the fourth and fifth striae; cilia dark brown to black. Hindwing and cilia dark brown to black. Abdomen black.

Female. Unknown.

Male genitalia. Uncus triangular, with weak median keel. Vinculum slender, about 3.1 × as long as valva; lateral margins distinct narrowed slowly and approximately parallel in anterior half; anterior margin rounded, posterior margin distinctly arcuate. Valva triangular, with blunt apex; inner margins slightly curved, lateral margins straight; sacculus slightly expanding at middle part, basal part fused medially; suspensorium nearly quadrate, anterior part slightly beyond posterior margin of vinculum in ventral view. Transtilla wide laterally and narrow medially; median process short and pointed, with straight anterior margin.Aedeagus slender; apical 1/3 curved dorsally; apical portion with dorsal and ventral lobes; vesica with a pair of long slender carinae dorsolaterally originated from apical 2/5. Juxta arrow-shaped; arrow-head long and pointed, lateral arms slender.

Holotype. [Sichuan] ♂, Xindianzi, Yajiageng, Moxi Town, Luding County, Ganzi Tibetan Autonomous Prefecture, 2019.VII.10, B. Chen & M. Deng leg. (HUNAU).

Etymology. The specific epithet refers to the type locality, Yajiageng.

Distribution. China (Sichuan).

Remarks. This species is endemic to Sichuan Province, China and occurs in July.

A DNA barcode of N. yajiagengensis sp. nov. is generated. This species is closest to one of the N. syfaniella specimen (LCQ217) with 0.051 of pairwise distance.