O. Merkl szerk.: Folia Entomologica Hungarica 67. (Budapest, 2006)

characteristic structure, which was once rich in shrub species like Ulmus minor, Acer campestre, Acer tataricum, Crataegus monogyna, Prunus spinosa, Cornus sanguineus, but the semi-intensive game management for Fallow Deer (Cervus dama) in the Körös Valley during the 20th century led to the degradation of the forest edges and the understorey flora, so nowadays the forest edges are occupied by only one or two shrub species. Dense thickets of Bslackthorn with young Pedunculate Oak (Quercus robur) and Pannonian Ash (Fraxinus angustifolia ssp. pannonica) trees though have naturally been established along roadsides, tracks and banks of agricultural canals all around the area, where the soil conditions make regeneration possible. The high density of Blackthorn scrub probably aided the survival of Eriogaster populations in the Körös Valley. ZOOGEOGRAPHICAL CONNECTIONS E. lanestris and E. catax are known mostly from hilly areas and foot hills, where they occupy the edges of thermophilous deciduous forests, warm southern facing slopes covered with scrubby grasslands, shrublands or karstic low woodlands. Both species can be fairly common in these types of habitats. Knowing very similar habitats in the southern parts of the Bihor Mountains in Romania, it is suspected that the rivers Sebes-Körös, Fekete-Körös and Fehér-Körös play the role of an ecological corridor connecting the Romanian and Eastern-Hungarian populations. Unfortunately, there are no recent faunistic data published neither from the adjacent Rumanian part of the Körös Valley, nor the Bihor Mountains, though one male and one female specimens of E. catax were collected in Ineu (Borosjenő), valley of Fehér-Körös by LÁSZLÓ DlÓSZEGHY in 1912 ("Borosjenő, Arad Megye, 1912.IX.29. Coll: DlÓSZEGHY" in HNHM, Budapest) and RÁKOSY et al. (2003) refer to records of E. lanestris and E. catax from the Körös Valley (the specimens were collected before 1980). Other examples indicate the connection of the Körös Valley to both the lower and higher elevations of Bihor Mts. Odontosia carmelita ESPER, 1799, a typical mountainous birch feeding species was collected by a light trap at Sarkad-Remete, as well as two specimens of Hydria (= Rheumaptera) undulata (LINNAEUS, 1758), a boreo-montane species (VOJNITS etal. 1991, KOVÁCS, Linpubl.). Chersotis rectangula ([DENIS & SCHIFFERMÜLLERl

, 1775), a Mediterranean xeromontane, rupicolous-grassland species was found at Sarkad-Remete in 1994, while Phalera bacephaloides (OCHSENHEIMER, 1810), a pubescental species, which occurs only in sub-mediterranean oak woodlands and steppes of southern faced slopes and hilltops with Quercus pubescens and Q. cerris, has been