Ptochoryctis marmorella sp. nov.

Figs 17, 56 A, B, 95

DNA barcodes.

BIN, BOLD: AGD 1582 (Process ID METAT 298-24).

Type material.

Thailand: Holotype • ♂, Central Thailand, Khao Yai NP, 800 m, 28. v. 1988, leg. Col. M. G. Allen, fwl 6 mm, specimen no. NHMUK 013700427, slide no. NHMUK 014332877.

Diagnosis.

See diagnosis for P. chalazopa.

Male (Fig. 17). Forewing length 6.0 mm, wingspan 14.0 mm. Head: frons with remains of white scales, vertex completely worn apart from collar of broad, flat, rich white scales from anterior margin of prothorax pointing posteriorly. Pilifers small with small tufts of bristles; maxillary palps white. Labial palps very small (1.5 × diameter of eye), closely appressed to head, recurved, without scales, second segment slightly longer than third, curved, third segment straight. Haustellum small, base covered in silver white scales. Antenna <¾ length of forewing, bipectinate, scape with traces of white scales remaining, flagellum pale brown, traces of white scales, bipectinate for more than 1 / 2 length, pectinations fairly long, pale brown, covered in short white sensillae, apical portion filiform. Thorax: with some white scales peripherally, tegulae short, white; forelegs brown, broad tibial epiphysis, mid and hind legs with some white scaling. Forewing broad, costa substantially arched at base, apex gently rounded, termen angled inwards slightly, tornus obtusely angled, dorsum rounded at base, forewing white and slightly iridescent, a large sub-medial dark blotch and large dark blotch postmedially extending to termen, remains of dark scaling in cilia. Hindwings narrower than forewings, apex rounded, termen angled slightly inwards, greyish white distally, white basally, cilia very long, brilliant white. Ventrally, costal half of forewing with dark scaling, whitish dorsally, hindwings white.

Female. Unknown

Pre-genital abdomen. White, anal tuft small, white. Patches of tergal spines on posterior parts of T 2 – T 7; T 8 and sternites unsclerotised. Apodemes straight.

Male genitalia (Fig. 56 A, B). Uncus short, broad throughout, emarginate medially, posterior apex spatulate, anterior margin of dorsal surface strongly emarginate. Gnathos with long broad lateral arms, medial plate an evenly curved band, projecting posteriorly. Tegumen band arched and broad, lateral extensions of tegumen approximately same length as width of tegumen band (Fig. 95). Vinculum robust, short, and broad, U-shaped, significantly projecting beyond base of valvae. Saccus short and broad. Juxta with circular basal plate, anellus lobes broad, extending well above base of costal margin of valva. Valva broad, costal margin almost straight, ventral margin slightly curved, distal margin curved, apically pointed, small sclerotised nodule at apex of valva, very weak ventral sclerite medially and postmedially. Sacculus indistinct, thickened postero-distal membranous extension short and fairly narrow. Aedeagus almost straight with a small distal projection.

Female genitalia. Unknown.

Biology and early stages.

Early stages unknown. Adult recorded in May at 800 m elevation.

Distribution.

Central Thailand.

Etymology.

Ptochoryctis marmorella – from marmoreus (Lat.) meaning marbled, from the marbled appearance of the forewing. The epithet is an adjective in the nominative singular.