S. Mahunka szerk.: Folia Entomologica Hungarica 61. (Budapest, 2000)

never coloured with white on the thorax are members of the genus Dolerus Panzer, 1801. The genus Dolerus Panzer, 1801 according to Konow's interpretation is a smaller genus than the same genus in Goulet's (1986) interpretation, therefore, we call it Dolerus Panzer, 1801 (sensu stricto) following Konow (1890). Zhelochovtsev (1988) kept the original generic divisions of Konow (1890) and divided the genus Dolerus Panzer, 1801 into four subgenera: Poodolerus Zhelochovtsev, 1988, Juncilerus Zhelochovtsev, 1988, Cyperolerus Zhelochovtsev, 1988 and Dolerus Panzer, 1801. The relationship between the two generic and subgeneric divisions (i.e. Holarctic and Palaearctic) needs further study. In this paper, I propose to study the genus Dolerus Panzer, 1801 (sensu stricto) in Konow's interpretation, and I decline to prepare a key for the species of the genus Loderus Konow, 1890. This is the first identification key for the Palaearctic species of this genus which is based on the structure of serrulae besides the usual sawsheath and penis valve figures. Serrulae were studied with 15.000 times magnification. This is a new and very useful approach for a safe identification of many closely related species. Several species are newly synonymised and revised here. This paper is a summary of my works having completed in the last five years. In this time, I checked many types (as many as I was lucky to receive) and identified approximately 5000 specimens, and described 9 new species. This paper is a status report of a long project which aims the better understanding of the systematics of this genus. The studied material (approx. 5000 specimens) comes partly from the Dolerus collection of the Department of Zoology of the Hungarian Natural History Museum and partly from my own collection. Additionally I also checked a high number of loaned material from world-wide. The types I studied are deposited in the following institutions: Deutsches Entomologisches Institut, Eberswalde Museum für Naturkunde, Berlin Zoologisches Staatssammlung, München The Natural History Museum, London Laboratoire d'Entomologie, Museum national d'Histoire naturelle, Paris Zoologisk Museum, Kobenhavn Natur Historiska Riksmuseet, Stockholm Smithsonian Institute, Washington Zoological Institute of the Russian Academy of Sciences, St. Petersburg Zoological Museum of the Moscow Lomonosov State University, Moscow National Science Museum, Tokyo There are a few species which have not been seen (for instance: type series of Dolerus coccinatus Zhelochovtsev, which is probably lost) these I included after the original descriptions and genitalia figures. Acknowledgements — The author would like to thank for their support Dr. Lajos Zombori, Dr. Frank Koch, Dr. Andreas Taeger, Mr. Stephan Blank, Dr. Tom Huddleston, Dr. David R. Smith and Dr. Akihiko Shinohara.