Monthly collections were done between July/1990 and June/1991 during the new moon at the Fazenda Aruanã an area of upland rainforest located alongside the Torquato Tapajós road, AM-010, at Km 215, city of Itacoatiara, Amazonas State, Brazil. A mixed 250 W mercury vapor lamp was used for atraction on a white sheet. 251 specimens of 9 genera and 18 species of Dynastinae were collected and there was predominance of Cyclocephala (three species were more numerous) and Ligyrus (only one abundant).
Coleoptera; Scarabaeoidea; Melolonthidae; Dynastinae; Amazon Basin