Aphids of the genus Uroleucon Mordvilko, 1914 (Homoptera, Aphididae) of the Russian Far East. I. Keys to subgenera and to the species of the nominotypical subgenus, descriptions of new taxa. Entomologicheskoe Obozrenie, 79(4) 2000: 835-850.943. 848 [Zoological Record Volume 137]