S. Mahunka szerk.: Folia Entomologica Hungarica 56. (Budapest, 1995)

Papp 1985a, 1993), e.g. any species on red deer droppings may occur on sheep droppings. It is possible that some specimens are from the pastures of cattle (even rather distant from these sheep-runs) but it is sure that at least a part of the specimens is autochthonous (emerged from sheep droppings on their pasture). As a part of the project "Zoocenological structures" supported by the National Scientific Research Fund (OTKA No. 3188) sampling and survey were made on droppings of dry sheep-runs in two Transdanubian (W Hungary) and one Kiskunság NP (C Hungary) areas in order to detect elements of community colonisation of coleopteran and dipteran populations. In our present studies we were to collect data on the steps of community organisation of these pioneer assemblages and also on the source of specimens colonizing droppings. In this paper only the qualitative results with the data matrix are published. MATERIALS AND METHODS Sampling and survey were made on droppings of dry sheep-runs in two Transdanubian (Zámoly, Forráspuszta and Vértesboglár) and one Kiskunság NP (Kunszentmiklós: Janovics-hodályok) areas. When sampling 20 seemingly isochronous (1 to 2 days old) sheep droppings each were selected and covered quickly by metal-and-glass isolators; isolators worked as photoeclectors for collecting flies. The flies crawled up into the isolator and were narcotized by chloroform. Beetles were manually selected thereafter (altogether 70 coleopteran species recorded, published elsewhere). Flies are colonizing and females lay eggs on fresh droppings of one or two days; droppings lose most of their odours attractive for females later (one day in hot summer, two or more days in cool autumn weather). During one day (and night) or two days also the beetles can colonize droppings in high numbers (as for abundances as well as species numbers). Since we were to study both insect groups on the same droppings, droppings of that age were selected for sampling. The sampling were usually made at a 100 to 300 m distance from the sheep-pens. The mean quantity of sheep droppings per surface units is very low in these dry sheep-runs (cf. White 1960, Olechowicz 1974). At those places sheep were grazing (and stayed for some time) before entering and just after leaving the sheep-pens; the density of sheep droppings is much higher (20 to 30 times higher) in these places than the mean density on the sheep-runs (an estimate is ca. five pieces/day/hectares calculated for one grazing sheep on 1 ha). The distances between isolators were measured and the distance data were converted into coordinate values by a software ("Profly 1.1") resulting in a "map of droppings" (orientated to the N). Imagoes collected by the isolators were kept in vials with the number of the isolators and identified in the laboratory. So as regards individual sheep dropping, a counting and not an estimation of the dipterous specimens was performed. It is a matter of course that as for the relationships, the species composition of the given sites, etc. these countings were reduced in summary values in order to estimate parameters. In order to detect the sources of coprophagous and other populations of sheep-run flies, pan-trapping of the insects falling down from the air-plankton was made parallel to