Abstract: Milan Janda, Petr KLIMEŠ & Marek L. Borowiec Milan Janda (contact author), Petr Klimeš, Biology Centre – Institute of Entomology, Czech Academy of Sciences & Faculty of Biological Sciences, University of South Bohemia, Branisovska 31, 37005, České Budèjovice, Czech Republic; New Guinea Binatang Research Center, Po Box 604, Madang, Papua New Guinea. E-mail: janda@entu.cas.cz Marek L. Borowiec, Department of Biodiversity and Evolutionary Taxonomy, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland. Myrmecol. News 10: 109 The ant diversity in New Guinea lowland forests is considered to be among the highest in the world (Wilson 1959, Snelling 1998). At the same time, the local ant fauna is extremely poorly known. Over 730 ant species have been reported from the whole island, representing an interesting combination of Australian and Se Asian taxa (Janda & Alpert 2007). However, many local species remain undescribed. During the past few years, we have explored several rainforest localities…