O. Merkl szerk.: Folia Entomologica Hungarica 68. (Budapest, 2007)

Table 1 (continued) Species 2002 20203 2004 20025 Norrbomia sordida (ZETTERSTEDT, 1847) 0 0 11 34 Coproica birtula (RONDANI, 1880) 0 0 1 10 Gonioneura spinipennis (HALIDAY, 1836) 0 0 6 1 Spelobia clunipes (MEIGEN, 1830) 0 0 9 4 Pullimosina heteroneura (HALIDAY, 1836) 0 0 2 0 Pullimosina pullula (ZETTERSTEDT, 1847) 0 0 1 0 Trachyopella leucoptera (HALIDAY, 1836) 0 0 1 8 Minilimosina (Allolimosina) alloneura (RICHARDS, 1952) 0 0 2 0 Opacifions coxata (STENHAMMAR, 1854) 0 0 1 0 Leptocera nigra OLIVIER, 1813 0 0 376 174 Rachispoda hostica (VILLENEUVE, 1917) 0 0 13 14 Meoneura neglecta COLLIN, 1930 0 0 13 0 Sepsis duplicata HALIDAY, 1838 0 0 0 S3 Themira minor (HALIDAY, 1833) 0 0 0 3 Alloborboruspallifrons (FALLÉN, 1820) 0 0 0 2 Philocoprella quadrispina (LAURENCE, 1952) 0 0 0 1 Opalimosina collini (RICHARDRS, 1929) t) 0 0 3 Hebecnema umbratica (MEIGEN, 1826) 0 0 0 1 Total 1,146 21,009 29,525 41,000 Identification If our starting point were that a specialist in Diptera identifies 100 to 200 flies of pinned museum specimens daily, the task of identification of our sampled material ought to have regarded as not feasible. However, the method of handling and identifying materials of high individual numbers was a part of our methods, which had been elaborated during the seventies. Its draft is as follow: 1) One sample of the material previously preserved in 70% ethyl alcohol is poured in a petri dish. A part of the alcohol is carefully poured out on one side, which results in having flies on that side of the petri dish, in the form of a crescent. Evaporation of alcohol during the following procedure will not cause desiccation of the specimens. 2) We determine, which is the species represented by the highest number; let's name it as sp. A. Individuals of sp. A are left along the side of the petri dish, all the other species are moved centrally by a pair of featherweight forceps. 3) When separation is complete, "not-A" specimens are carefully replaced in alcohol under the original number of samples. 4) The individuals of sp. A are counted. By this process we have an opportunity to find specimens of "not-A" species, which were erroneously left among specimens of sp. A. 5) The process is continued for sp. B according to steps 2-4 above on the whole material of the same sample. We add those individuals of sp. A, which were originally left out erroneously. The strength of the method is, beside its rapidness, that we can see twice every specimen.