O. Merkl szerk.: Folia Entomologica Hungarica 69. (Budapest, 2008)

Hungarian test sites on the riverside of the Duna, it was a naturally arising question whether the species can be found on the Hungarian side also. The beetle was said to be associated with the plant Leucojum aestivum L., a typical inhabitant of often-flooded riverine woods. Abbreviations - DEIC = Deutsche Entomologische Institut, Müncheberg, Germany; HNHM = Hungarian Natural History Museum, Budapest, Hungary; MHNG = Muséum d'Histoire Naturelle, Genève, Switzerland. MATERIAL AND METHODS To the knowledge of the author, this species was not collected at any new locations (other than those listed in the original description). The Hungarian part of the Duna is heavily affected by the Slovakian alteration of the flow of the river. Of the three sites in the monitoring study, the one at Nagybajcs seemed to be most suitable. This locality is an unaffected gallery forest with lagoons (often with water). It is tegularly flooded, therefore rather sparsely vegetated. An ideal site for Leucojum aestivum L., which is a plant growing singly, but specimens can occur close to each other. Two groups of plants were tested, one almost immediately (a few meters away) at the waterside, the other group of plants was situated at a higher ridge towards the next lagoon. In the first group only the top 10 centimetres of the soil was dug up (below that there was water), at the other group, the top 20-25 cm. The samples were then treated according to the so-called "soil-washing" method. The soil was put in a water-filled bucket and the organic material coming to the surface was gathered with a fine net and transferred to a fabric bag in which it was let to drip from the water. Back in the laboratory the sample was placed in a Berlese funnel and the specimens let to fall in a container with 80% ethyl alcohol. The funnel was watched throughout 5 days. Altogethet 6 specimens (adults) of Thinobius korbeli were collected. Earlier this year GlULlO CUCCODORO sent me a few unmounted specimens of the material that was the basis of the description and which are kept in MHNG. The MHNG material also contained a couple of larval specimens, all collected in July, with the same method as the adults. One of these larvae surely belongs to Thinobius, compared to the only described larva of the genus, that of Thinobiusfrizzelli HATCH, 1957 (KlNCAlD 1961 ). Since the occurrence of another Thinobius species in such habitat is very unlikely, this specimen is supposed to be a larva (probably L2 stage, judging from its size) of T. korbeli. Unfortunately, the specimen is very poorly preserved and not suitable for a proper description. Following is the list of the specimen data. Thinobius korbeli - SLOVAKIA: Cicov, 24.VII.1994, leg. O. MAJZLAN (DEIC, 1 female, Paratypus, MNHG, 4, plus 1 larva, 1 male adult [fragmentary] embedded in Euparal, Paratypus, HNHM, 2, Paratypus); Cicov, 24.X. 1994, leg. O. MAJZLAN (MNHG, 1 female). HUNGARY: Győr-Moson-Sopron m., 1 km N Nagybajcs, 110 m, Leucojum aestivum roots, 15 cm, soil washing, Berlese funnel, 47°46'34"N, 17°40' 47"E, 11.VI.2008, leg. GY. MAKRANCZY (HNHM, 6).