Promalactis Meyrick, 1908a, J. Bombay Nat. His. Soc., 18: 806. Type species: Promalactis holozona Meyrick, 1908 . Type locality: Coorg, S. India. Promalactis acanthiana Kim and Park, sp. nov.

(Figures 1A, B, 2A, and 3A–D)

Diagnosis

This species is externally similar to Promalactis albisquama Kim and Park, and Promalactis clavata Du, Li and Wang, by having an oblique band-like marking and a semi-circular costal patch in forewing pattern, but can be distinguished by the male genitalia with a long cornutus of the aedeagus.

Description

Adult (Figure 1A, B). Head (Figure 2A): Frons shiny whitish-yellow, vertex deep yellowish-brown. Antenna with scape entirely white, as long as diameter of eye; flagellum white basally and mixed with dark brown alternately from one-third along to apex. Labial palpus dark brown except basal part of third segment entirely white; third segment almost same length as second segment. Thorax: Thorax yellowish-brown; tegula darker than thorax. Wing expanse 8.0– 8.5 mm. Forewing ground colour yellowish-brown; two white markings surrounded by fuscous scales presented; one oblique, from one-third costal margin transverse to one-half of posterior margin, band-like and the other costal patch at two-thirds of costa of forewing; fringes white at termen, speckled with fuscous scales, partly greyish-brown fringes beyond apex and before tornus. Hindwing more or less lanceolate; fringes greyish-brown. Leg: hind leg pale yellowish-brown ventrally, except dark brown medial to fifth segment of tarsus.

Male genitalia (Figure 3A–D). Uncus bell-shaped, wide at base. Gnathos tongue-like, as long as uncus. Valva more or less broad; costa densely setose from one-third beyond apex to apical sacculus; apex thumb-like. Juxta with a pair of symmetrical lobes, extremely long, slightly shorter than valva. Saccus wide at base, as long as

tegumen. Aedeagus long, straightly developed, as same length as juxta; cornutus placed apically, one-quarter length of aedeagus.

Female genitalia. Unknown.

Holotype

Male, Tam Dao Nat. Park, Vietnam, 1000 m, 5 May 2005, KT Park and S Kim, slide gen. no. SNU-9273/ S Kim; Paratype. One male, Tam Dao Nat. Park,

Vietnam, 1000 m, 4 May 2005, KT Park and S Kim, slide gen. no. SNU-9276/ S Kim.

Distribution

Oriental: Vietnam (North).

Etymology

The specific name is derived from the Latin, acanth -i (= spine) plus a Latin suffix - ana, referring to spine-like cornutus of the male genitalia.