(Figs. 1–7)
Cerostoma leuconotella Snellen, 1884: 157. Type locality: Chingan Mts (currently Khingan Mts), China, Inner Mongolia.
Cerostoma lonicerella Stöckl, 1922: 67. New synonymy. Type locality: Worochta, Ukraine.
Material examined. Ypsolopha lonicerella : Holotype ♀, labelled: Worochta (Rebowacz), zb A Stoeckel [printed], 30 / 6 [1] 910 [pencil hand written], Cerostoma lonicerella Stockl [pencil hand written] (NM, HOLOTYPE female, Cerostoma lonicerella Stöckl, 1922, teste E. Baraniak, 2013).
Ypsolopha leuconotella: holotype ♀; not found (presumably lost).
Other specimens: Italy: Gemona, 11.08.1952, 1 ♀, Pinker leg. (ZSS).
Kazakhstan: Janwarcewo, Ural Mts., 08. 1950, 1 ♂, Martynowa leg. (ZI); Romania: Jigodin, Miercurea-Ciuc, 08.08.1956, 1 ♂, 1 ♀, Popescu Gorj leg., (BMNH); Jigodin, Miercurea-Ciuc, 22.07.1952, 1 ♂, 6.08.1956, 1 ♂, 8.08.1956, 1 ♂, Popescu-Gorj leg. (DEI); Jigodin, Miercurea-Ciuc, 08.07.1956, 1 ♂, Popescu Gorj leg. (HNHM); Jigodin, Miercurea-Ciuc, 19.08.1955, 1 ♀, Popescu-Gorj leg., Viette coll. (MNHN).
Russia: Guberli, Sud. Ural, 25.06.1897, 1 ♂, 1 ♀, Duske coll. (ZI); Irkutsk 40 km, N. steppe slope ad. luc., 1 –3.08. 1984, 5 ♂♂, 1 ex abdomen missing, Mikkola, Viitasaari leg. (ZI); Altai, Teletskoe oz[iero], Artybas biological station. 18 – 22.08.1982, 10 ♂♂, 1 ♀, 1 ex abdomen missing, Mikkola leg. (ZI); SW-Altai, Katun Valey 10 km, W. Katanda, 1200m, 15 – 19.07.1983, 2 ♂♂, 1 ♀, Exp. Mikkola, Hippa & Jalava leg. (ZI); SW-Altai, Katun Valey 10 km, W. Katanda, 1200m, 26 – 27.07.1983, 2 ♂♂, 1 ex abdomen missing, Exp. Mikkola, Hippa & Jalava leg. (ZI); Jakutia Elanka 147 km upstr, Lena River from Irkutsk, 26.07. 1980, 1 ♂, Ju. Ammosov leg. (ZI); Sochondanskij zapowiednik, Bukukun, 8.08.1991, 1 ♂, Dubatalov leg. (ZI); Samodon, Amur, 100 km W., Swobodnogo, 4.08.1959, 1 ♂, Falkowitsch leg. (ZI); Ussur. kr., Jakowlewka Spas, 15.08.1926, 1 ♀, Filipiew leg. (ZI); Irkutsk, Turkinsk, 07.1925, 1 ♀, Bang Haas leg. (ZI); Sedanka, Wladiwostok, 21.07.1915, 1 ♀ (ZI); Wjazemskaja, Ussurijskij kraj, 14.07.1909, 1 ♂, 14.07.1914, 1 ♂, E. Borbow leg. (ZI); Minusinsk kraj, 1.07.1926, 1 ♀, Sigankow leg. (ZI); Kamczatka, 30.07.1908, 3 ♂♂, 2 ♀♀, Werszalin leg. (ZI); Irkutsk, 40 km N, steppe slope ad luc[em], 1 –3.08.1984, 1 ♀, Mikkola & Viitasaari leg. (ZM); Jakutia Elanka 147 km upstr. Lena River from Irkutsk, 26.07. 1980, 1 ♀, Ju. Ammosov leg. (ZMU); SW-Altai, Katun Valey, W Katanda, 1200 m, 26 – 27.07.1983, 1 ♂, Exp. Mikkola, Hippa & Jalava leg. (ZMU); SW—Altai, W Katanda, 1200 m, 15 – 19.07.1983, 1 ♂, Exp. Mikkola, Hippa & Jalava leg. (ZMU).
Description. Head and thorax white, with pale grey and dark fuscous scales. Antenna simple: scapus and pedicellus with flat scales of the same colour as those on the head. All parts of flagellum white with distinct black-brown ring on each segment. Abdomen pale shining white-grey. Labial palpus long, last segment: white, short, tiny, curved and pointed. Second segment with clearly visible tuft of white and brown scales, tuft longer than segment. Forewing lanceolate with apex acutely produced, bi-coloured: fuscous (basal and costal area) and white (dorsal, termen, apical and apex area); white part with scattered very small black scales. Veins r 4 and r 5 separate. Cilia long and greyish. Hindwing grey with long, concolorous cilia.
Female genitalia. Apophyses posteriores distinctly longer than apophyses anteriores. Antrum membranous, cupped. Ductus bursae membranous only in short section from antrum to inception of ductus bullae; short section posterad of inception of ductus bullae strongly strengthened, the rest with small and sparse denticles. Ductus bullae narrow with small bulla seminalis, ductus seminalis membranous, tiny. Bursa copulatrix membranous. Signum conspicuous, elongate, with two ridges.