Digger wasps of the tribe Gorytini (Hymenoptera, Sphecidae) of the fauna of Russia and neighbouring countries. The genera Lestiphorus Lepeletier, Oryttus Spinola and Olgia Radoszkowski. Entomologicheskoe Obozrenie, 71(4) 1992: 935-949, 953. 940 [Zoological Record Volume 130]