A revision of the buprestid subtribe Xenopsina subtr. n. with description of new species of the genera Xenopsis Saund. and Sommaia Toyama (Coleoptera, Buprestidae, Polycestinae) and notes on the systematic position of the subtribe. Entomologicheskoe Obozrenie, 87(3) 2008: 627-649. 636 [Zoological Record Volume 145]