Leucoma sichuana Xie & H. Wang, 2022

Leucoma sichuana Xie & H. Wang sp. nov.

( Figs 17–18 View FIGURES 11‒18 , 29 View FIGURES 25–29 , 35 View FIGURES 30–35 )

Diagnosis. The new species resembles L. ochripes and L. niveata in male genitalia, but can be easily separated from the latter two by the following characters: labial palpus white; middle and hind tarsi wihte, mixed with pale yellow scales; the left valva nearly rectangle, with a tiny plate of setea on inner surface; the right valva broad at basal half, narrow at distal half, densely covered with setea on cucullus; saccus small.

Description. Adult. Forewing length: 32–33mm in male holotype, 40–42mm in female paratypes.

Head: Antennae bipectinate, fuscous; frons and vertex covered with white dense hairs; labial palpi white, short.

Thorax: dorsally and ventrally covered with white scales, tegula white. Forewing white, R 1 and R 2 almost parallel, R 3, R 4 and R 5 stalked, M 1 arising from upper angle of discal cell, M 2 and M 3 arising from the lower angle of discal cell respectively, Cu 1 and Cu 2 approximately parallel, fringe white. Hind wing white; Rs and M 1 short stalked, M 2 and M 3 arising from the lower angle of discal cell respectively, fringe white. Legs densely covered with white hairs, except forelegs mixed with yellow scales.

Male genitalia. Uncus triangular basally, digitate apically; tegumen broad; valvae strongly asymmetric, left valva approximately rectangle, its inner surface with a tiny plate of setae; the right valva broad at basal half, narrow at distal half, densely covered with setae on cucullus; saccus small; aedeagus short, distal gradually slightly curve toward distal; vesica sclerotized at base, without spines.

Female genitalia. The anterior apophysis and the posterior apophysis almost equal in length; the ostium small; the ductus short, basally sclerotized; the bursa long oval-shaped, with a M-shaped signum.

Material examined. Holotype: 1♂, Longcanggou National Forest Park, Yingjing County, Ya’an City , Sichuan, 2.VII.2016, leg. M. Wang. Paratypes: 1♀, same data as holotype ; 1♀, same locality as the holotype, 31.VII.2015, leg. M. Wang.

Distribution. China ( Sichuan).

Etymology. The species name after the type locality Sichuan Province.