New taxonomic data on the genus Ypsolopha Latreille (Lepidoptera, Ypsolophidae) with descriptions of two new species from the Russian Far East

Two new species of the genus Ypsolopha Latreille, 1796 are described from Far East of Russia: Ypsolopha melanofuscella sp. n. and Y. straminella sp. n. Two new synomymies are proposed: Y. ulingensis Yang, 1977, a new junior synonym of Y. costibasella (Caradja, 1939); and Cerostoma falculella Erschoff, 1877, a new junior synonym of Y. asperella Linnaeus, 1761. The species Y. costibasella Caradja, 1939, Y. nigrofasciata Yang, 1977 and Y. nigrimaculata Byun et Park, 2001 are recorded from Far East of Russia for the first time. The male genitalia of Y. nigrofasciata are described and illustrated for the first time, diagnostic genital characters are given.