Description of two new species of Pachnoda Burmeister, 1842 from Congo, and two new subspecies of Lansbergia Ritsema, 1888 and Polystalactica Kraatz, 1882 from Tanzania (Coleoptera, Cetoniidae). Entomologia Africana, 18(2), Sep 2013: 2-8. 4 [Zoological Record Volume 151]