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)

Sculpture: Head of L. nigriceps is strongly sculptured, frons is striated longitudinally without smooth and shinning megian part, while frons of L. tuberum always has a smooth and shinning middle part. L. nigriceps\s, monogynous, while L. tuberum often forms polygynous colonies. Distribution - All specimens were collected in dry limestone habitats with dwarfed xerophilous vegetation. The nest was found in a slit of a limestone boulder. It had not any grown up sexuals, but it had many well-developed sexual pupae at the time of collection (16 June 1998). Each sexual pupae were raised to hatch in an artificial nest. This species has been reported from South and Central Europe (RADCIIENKO etal. 1999), Bulgaria, Greece, Turkey (European pail only) and Yugoslavia (AGOSTI & COLLINGWOOD 1987a, PETROV 2001). This species is new for Hungary. Leptothorax sordiduius saxonicus SEIFERT, 1995 Leptothorax sordiduius MÜLLER, 1923, Bollettino della Societä Adriatica di Scienze Natural! in Trieste 28: 96, pt. I. (partim). Leptothorax sordiduius saxonicus SEIFERT, 1995, Abhandlungen und Berichte des Naturkundemuseums Görlitztä (7): 14. Material examined - 5 workers, Hungary, Aggtelek National Park, Jósvafő, 17.06.1998, leg. TARTALLY & Csősz. 1 queen, Hungary, Budaőrs, Csiki-hegyek, 20.04.1997, leg: TARTALLY. Metrical data of the L. sordiduius saxonicus queen. HL: 700, HW: 705, Fr: 250, SL: 475, ML-spin: 1100, ML-lobus: 1120, MH: 620, CI: 0.99, HW/Fr: 2,82, MI: 1.77 Description - Antennae with 12 segments, antennái club always always as pale as rest of funiculus. Dorsum of alitrunk with well-visible mesopropodeal impression. Propodeal teeth short and straight. Frontal and dorsal surface of petiole meeting in acute angle at its apex in lateral view, dorsum of petiole with a distinct posterior step backward. Colour of head brown or yelowish brown. Alitrunk lighter than head, yellowish-brown or brownish-red. Gastral tergites light brown or yellow at base, posterior parts darker. Anterior part of head and frons of worker striate, occiput finely striate, while queen with well-visible reticulate sculpture on head. Notes - This species is new for Hungary. Neither L. sordiduius saxonicus nor its nominate subspecies L. sordiduius sordiduius have not been found in Hungary until now. L. s. sordiduius is spreading from its refuge in southern Appenines, invaded northern Italy, western Austria, Slovenia, Croatia and north-western Serbia, while L. s. saxonicus has a southern Balkanian refuge. According to SEIFERT (1995, 1996) L. s. sordiduius and L. s. saxonicus probably overlap in Austria, Slovenia and middle part of Germany.