A review of the stratiomyid-fly genera Neopachygaster Austen, Eupachygaster Kertesz and Pachygaster Meigen (Diptera, Stratiomyidae) from Russia and neighbouring countries. Entomologicheskoe Obozrenie, 83(2) 2004: 490-506, 511. 499 [Zoological Record Volume 141]