Homaloxestis trapezialis Yu et Wang, sp. nov.

(Figs 2, 6, 10, 14, 18)

Type material. CHINA, Hubei Province: Holotype ♂, Duchuan Village (31°89′N, 110°71′E), Fang County, 793 m, 19.VII.2017, leg. Wanding Qi et al., slide No. YS19342. Paratypes: 2♀, same data as holotype, slide Nos. YS19343, YS19399.

Diagnosis. This species is similar to H. briantiella (Turati, 1879) in the male genitalia, but it can be distinguished from the latter by the rectangular process on the ventral margin of the valva, and the juxta concave in U shape medially on the posterior margin in the male genitalia, and the ductus bursae shorter than the corpus bursae in the female genitalia; whereas in H. briantiella, the process on the ventral margin of the valva is triangular, the juxta is semicircularly concave on the posterior margin (Gozmány 1978: Taf. 19, Fig. 7), and the ductus bursae is longer than the corpus bursae (Gozmány 1978: Taf. 20, Fig. 11).

Description. Adult (Figs. 2, 6) wingspan 15.0‒16.0 mm. Head greyish brown, laterally with creamy-white scales.Antenna pale orange. Labial palpus with second segment thickened, creamy white on inner surface, brownish yellow on outer surface; third segment slender, as long as second segment, creamy white dorsally, dark brown ventrally. Forewing with costal margin gently arched, apex obtuse, termen oblique; greyish brown, with a creamy-white band running from base to distal 1/4 below costal margin, with rough pale orange scales along distal 1/4 of costal margin; humeral streak dark brown, about 1/5 length of costal margin; all veins free except R 3 stalked with R 4+5 at 1/6 length, R 4 and R 5 stalked for about 3/5 length. Hindwing and fringe greyish brown; vein M 3 stalked with CuA 1 for about 1/4 length. Fore- and midlegs pale orange dorsally, pale brownish yellow ventrally; hindleg pale orange on inner surface, brownish yellow on outer surface, tibia roughly scaled.

Male genitalia (Fig. 10). Uncus lobe sub-rectangular, wider than long, shallowly concave on posterior margin, forming short posterolateral lobes. Gnathos with basal plate sub-quadrate; median process broad at base, narrowed to about distal 1/3, then slender, curved ventrad preapically by a right angle. Costal bar uniformly narrow, slightly angled at middle. Valva broad basally, with a rectangular process medially on ventral margin; cucullus slightly wid- ened before rounded apex, with a row of short, strong setae from basal 1/3 to apex above ventral margin; sacculus narrow at base, slightly widened to before middle, then narrowed to ventral process of valva. Juxta slightly widened posteriorly, deeply concave in U shape on posterior margin, forming short posterolateral lobes rounded apically; with small process on outer margin of posterolateral lobe, shorter than posterolateral lobe; small imbricated process at middle on anterior margin. Vinculum triangularly produced anteriorly. Aedeagus slightly curved, shorter than valva, slightly narrowed from middle to obtuse apex; cornuti consisting of two needle-like spines, about 3/5 length of aedeagus.

Seventh sternite (Fig. 14). Anterolateral rib thin, not reaching sixth abdominal segment; anterior margin produced medially, forming a trapezoidal process about same length as anterolateral rib.

Female genitalia (Fig. 18). Eighth sternite shallowly concave at middle on posterior margin. Apophyses posteriores about twice length of apophyses anteriores. Ductus bursae shorter than corpus bursae, partly sclerotized posteriorly; ductus seminalis slender, arising from anterior 1/4 of ductus bursae. Corpus bursae large elliptical; signum longitudinally elongated, rod-like, about 1/3 length of corpus bursae, with dense denticles, located posteriorly.

Distribution. China (Hubei).

Etymology. The specific epithet is derived from the Latin trapezialis, referring to the anterior margin of the seventh sternite in male produced to a trapezoidal process medially.