Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 93. (Budapest 2001)

Csősz, S.: Taxonomical and distributional notes on two new and a rare Leptothorax Mayr, 1855 species for the Hungarian ant fauna (Hymenoptera, Formicidae)

MATERIAL AND METHODS Collections were mainly made by hand-searching, and in a few case by pitfall trap. All of the mentioned specimens are deposited in the author's collection and the collection of Hymenoptera of Hungarian Natural History Museum (HNHM). The identification is based on the works of AGOSTI & COLLINGWOOD (1987a, b), BERNARD (1967), KUTTER (1977), RADCHENKO et al. (1998, 1999), SEIFERT (1995, 1996) and S'rrrz ( 1939). Since males of the Leptothorax species are without reliable external morphological characters, only workers and queens were used for this study. All measurements have been taken on dry preparations using Olympus BX 40 microscope at magnification lOOx. All measurements arc given in pm, accuracy of the measurements is 5 pm. Measured characters and the explanation of the abbreviations as follows: Fr = maximum width of frontal carinae immediately posterior to the scape insertions. HL = maximum head length in median line from the clypeus to posterior border of occiput. The head must be carefully turned until the maximum length would be visible. HW = maximum head width across the eyes. ML-spin = mesosoma length measured as maximum distance from the anterior border of promesonotum to the tip of the propodeal spine. ML-lobus = mesosoma length measured as maximum distance from the anterior border of promesonotum to the most posterior lower margin of lateral propodeal lobe. Both mesosoma lengths have to be taken in lateral view. SL = maximum scape length in straight line excluding articular condyle. MH = maximum mesosoma heigth. CI = cephalic index, showing the ratio of the head length and width (HL/HW), which characterises the head prolongation. Ml = mesosoma index (ML-spin/MH), showing the mesosoma prolongation. SURVEY OF SPECIES Leptothorax nigriceps MAYR, 1855 (Figs 1-2) Leptothorax tuberum var. nigriceps MAYR, 1855, Verhandlungen der Zoologisch-botanischen Vereins in Wien 5: 441. Leptothorax tuberum tuberum var. nigriceps: MAYR & EMERY 1916, Bollettino della Societä Entomologien llalianaAl: 174, see BARONI-URBANI, 1971. Leptothorax nigriceps: MAYR & FlNZI 1924, Bollettino della Societä Entomologica Italiana A60: 122, see BARONI-URBANI, 1971. Material examined - 12 workers, 1 queens, (males have not been found), Jósvafő, Aggtelek National Park, Hungary, 16.06.1998, leg. TARTALLY & CsŐSZ; 1 worker, Hungária, Jósvafő, Nagy-oldal, 11.05.1989, leg. GRABANT A. (HNHM). Metrical data of 7 workers. HL: 615, HW: 558, Fr: 220, SI: 455, ML-spin: 698, ML-lobus: 760, MH: 318, CI: 1,10, HW/Fr: 2,79, MI: 2,20