Folia Historico-Naturalia Musei Matraensis - A Mátra Múzeum Természetrajzi Közleményei 5. (1978-1979)

Kiss, O.: A Melampophylax nepos Mc Lachlan (syn. Halesus nepos Mc Lachlan, Trichoptera) előfordulása Magyarországon

Fol. Hist.-Nat. Mue. Matr. 5. 1978-79. Occurence of Melarapophylax nepos Mc LACHLAN (syn. Halesus nepos Mc LACHLAN, Trichoptera) in Hungary KISS Ottó Ho Si Minh Teachers' College, Eger ABSTRACT: (Occurence of Melampophylax nepos Mc LACHLAN (syn. Halesus nepos Mc LACHLAN, Trichoptera) in Hungary. ) - The stream Sebesviz in the Bükk Mountains has been sampled for two years and larvae of Melampophylax nepos Mc LACHLAN, a species of Trichoptera characteristic of high altitudes only and being new to the fauna of Hungary were found. The ecological characteristics of their habitat and the description of the larva are given as well as their values of dominance. INTRODUCTION Trichopterous larvae were collected at three sampling stations monthly from the stream Sebesviz in the Bükk Mts from July 1974 to June 1975 then bi-monthly from July 1975 to June 1976. On 17 Aug. 1974 the author was informed of the occurence of Melampophylax nepos Mc LACHLAN in the Bükk Mts both by J. OLÁH and Z. VARGA. First and second instar larvae of this species, which is new to Hungary were collected from the spring region of the stream (eucrenon, spring Huba) on 8 March 1975 for the first time, and in the succeeding months they were found also in other reaches of the stream. On 25 Sep, 1975 its imago was light-trapped. Occurence of Halesus nepos Mc LACHLAN (which is a synonim to Melampophylax nepos Mc LACHLAN) in the Paring Reteza is mentioned by S. PONGRÁCZ (1914). On 3 Oct. 1955 Melampophylax nepos Mc LACHLAN was captured by L. BOTOSANEANU in the valley Olaresei a Predeal Bucegi Mts, South Carpathians. In accordance with SCHMID Melampophylax nepos Mc LACHLAN occurs at high altitudes in the northern mountains of Central Europe, in the Eifel and Huge Mts, in the Polish Carpathians, in Transylvania and the South Carpathians as well. Neither its occurence in Hungary has been recorded in the literature nor the description of the larva has been published yet. Diagrams of genitals of its imago were published both by SCHMID (1951) and L. BOTOSANEANU (1957). HABITAT Larvae of Melampophylax nepos Mc LACHLAN occuring in the Bükk Mts belong to the "petricolous" fauna found on the edges of the safer undersides of stones in the cold and rapid reaches of springs and streams of the valley Sebesviz. The stream Sebesviz rises from the spring Huba with two branches. Its height is 560 m above sea level. The water originates from Triassic limestone, the average water output is 4,6 1/sec. The water temperature range is 7,4-10,8 °C. The area under investigation is found in a valley with steep slopes which is of nearly high altitudinal characteristic. The valley is shady with cool microclimate, and is covered with Melitti Fagetum Subcarpaticum SOO. On the large stones being of limestone there is a thin coating of alga and moss which are preferred by the species of litho-rheotactic (SHELFORD, 1915. p. 4. ) 79