Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae Author FIBIGER, MICHAEL text Zootaxa 2010 2010-08-31 2583 1 1 119 http://dx.doi.org/10.11646/zootaxa.2583.1.1 journal article 10.11646/zootaxa.2583.1.1 1175­5334 10094382 Tactusa incognita Fibiger , new species ( Plate 2 , figure 8; female genit. plate 22, figure 4) Material examined. Holotype , female. Thailand : Nakhon Naoyk Prov. , Khao Yai Nat. Park , ca. 700 m , 29.ix.– 6.x.1984 , leg. O. Karsholt et al. , genit. prep. 2939 M. Fibiger , coll. ZMUC . Taxonomic notes. T. incognita is a member of the T. nieukerkeni species-group, all of which have a blackish triangular or quadrangular patch between the antemedial and postmedial lines; the typical Tactusa ampulla; and prominent features listed under the females of the species-group and individually for the species below and the next species. Diagnosis. Imago (external). Wingspan: 9 mm . Forewing: ground colour light yellow, with acutely-angled blackish patch in upper medial area, black subterminal area and three black dots on costa between medial patch and apex. Crosslines: only subterminal and terminal lines indicated; former inwardly outlined by light yellow, latter indicated by black interneural spots. Reniform stigma: well marked, white, outlined black. Hindwing: dark grey, with very faint discal spot. Underside: unicolorous grey. Male genitalia. Unknown. Female genitalia. Ovipositor: quadrangular with rounded corners. Posterior apophyses: slightly longer than ovipositor. 8 th abdominal segment: extremely long (apo.). Ostium: slightly displaced to left. Antrum: short, cylindrical, with a medial swelling, curved at 45º (apo.). Ductus bursae: membranous, long, narrow, coiled, 3.5 times longer than corpus bursae. Appendix bursae: arising immediately posterior to antrum. Corpus bursae: ovoid. Signum: cross shaped. Differential diagnosis. T. incognita differs from other Micronoctuidae from SE Asian and Oriental regions in long 8 th abdominal segment and peculiar shape of antrum, described above. Distribution. Known from one specimen from Thailand .