When studying the Microlepidoptera fauna of Madeira, the second author came across two puzzling big specimens of the Olethreutinae (Tortricidae): one, a male from the Staatssammlung für Naturkunde, Karlsruhe, Germany, another, a female, from the Naturhistorisches Museum, Wien, Austria. The two specimens appeared to belong to one and the same, sexually dimorphous, apparently new species which is described below. The holotype, ♂, will be deposited in the Karlsruhe Museum, the allotype, ♀, in the Vienna Museum. We are indebted to the authorities of the Karlsruhe and Vienna Museums for the kindness of entrusting this material to us for identification. The photographs of the genitalia have been made by Mr. Bent W. Rasmussen, Copenhagen Museum. Acroclita anelpista spec. nov. Diakonoff & Wolff (pls. 1, 2) (ανελπιστος = unexpected) ♂ 18 mm. Head and thorax grey-fuscous, slightly mixed with darker fuscous. Antenna pale ochreous, finely dark-ringed. Palpus long, porrect, median segment dilated by roughish scales above and beneath, broadest in middle, top truncate; terminal segment rather long, smooth, subobtuse; rather pale fuscous, broadly dusted with darker fuscous along edge and in middle, terminal segment darker fuscous. Fore wing moderately broad, suboval-truncate, costa moderately curved throughout, apex obtusely pointed, termen moderately sinuate above, rounded beneath, rather oblique. Pale greyish-ochreous, densely dusted throughout with light fuscous-tawny and strewn with numerous fine blackish points, irregular but towards dorsum tending to indicate transverse oblique strigu-