New data on orb-weaving spiders (Aranei: Araneidae) distribution in East Asia

New records of orb-weaver spiders Aculepeira serpentina Guo & Zhang, 2010 from China and Argiope amoena L. Koch, 1878 from the Russian Far East is provided according to the results of revision spider specimens, kept in Zoological Institute of Russian Academy of Sciences (St. Petersburg). The species diagnosis, information on distribution and ecology, images of bodies and SEM photographs of copulatory organs are provided.