Adult - Wingspan 22-24 mm. Antenna filiform; scape with black scales above and with white ones below; flagellum covered with brown scales and bristles. Maxillary palp white with black scales, labial palp white, with ne black ring on each segment. Proboscis whitish, frons and vertex white, thorax with four black spots; tegulae white with black basal dot. Forewing overlaid with black markings on white background; a long, rather broad, bisinuate black stripe running from base of costa, below cell towards apex into cilia, consisting of partly or fully fused, elongate spots characteristic of this species. Hindwing grey; with black costal brushes; cilia grey. Legs and abdomen greyish.
Male genitalia - Uncus bifid, with long, slender, acute arms. Posterior part of gnathos forming a rather long, sclerotized, pointed medial process, anterior part wide, divided into two symmetrical lobes, covered with strong bristles and teeth; labis sclerotized, broad, finger-shaped. Valva rather broad, slightly curved, apically tapering, with apex finely rounded, ventral margin with slight incision below cucullus. Ventral surface covered densely with long hairs, costal plate of valva small, rounded triangular. Aedeagus convex, rather flat, hook-like, vesica with a long, flattened, apically pointed cornutus.
Female genitalia - Ovipositor sclerotized, papillae anales conical, setose, posterior apophyses thin, longer than papillae; anterior apophyses short, narrow, pointed. Antrum short, sclerotized, a ring-like tube. Ductus bursae rather broadly tubular with “tightly appressed” coils posterior end flattened, with strongly sclerotized bar. Corpus bursae spherical, signum narrow, elongate, a “shallow crease”,
Ethmia zygospila Meyrick, 1934, Exotic Microlepidoptera 4: 459 (Type locality: Taiwan. Type in MGAB)
TAIWAN. Nantou County: 1 specimen (unsexed), Ursung Forest [Huei-Sun Forest], 16 km E of Kuoshing, 560 m, 29-30.X.1996, Cs. Szabóky leg (HNHM); 2 specimens (unsexed), 3 km E of Tili, 555m, 27-28.V.1997, Cs. Szabóky leg (HNHM). Tainan County: 1 specimen (unsexed), Kanshirei, 1000ft, 21.IV.1908, A. E. Wileman leg., GU-7478-BM (NHM). Kaoshiung County: 26 km SE of Taoyuan, 1370 m, 4.XI.1996, Cs. Szabóky leg. (HNHM); Chiai Meishan Juili, 3-4.XI.1995, M. L. Chan & W. T. Yang leg. Taitung County: 1♂, Chihpen Hot Springs, 400 m, 10-11.VI.1997, B. Herczig & L. Ronkay leg., Slide No. Kun 37 (HNHM); 1♂, Chihpen Hot Springs, 400 m, 6.IV.1997, Csorba & L. Ronkay leg., Slide No. 38 (HNHM); 1♀, 4 km N of Tupan, 390 m, 14.VI.1997, 120°52’E, 22°28’N, Cs. Szabóky leg., Slide No. 40 (HNHM); 1 specimen (unsexed), 7 km E of Taimali, 710 m, 20.V.1997, Cs Szabóky leg. (HNHM); 1 specimen (unsexed), 3 km W of Hungyeh village, 350 m, 13.VI.1997, Cs. Szabóky leg. (HNHM).
Only known from Taiwan (Kun & Szabóky, 2000)
Distribution in Taiwan
Secondary and indigenous forests in Nantou, Chiayi, Tainan, Kaohsiung, and Taitung.