Dr. Murai Éva szerk.: Parasitologia Hungarica 12. (Budapest, 1979)

Acarological material consists from free living nidicolous and obligatory species (MRCIAK and ROSICKY 1959, ROSICKY and MRCIAK 1967). Some species have epidemiological and epizootic significance. Fam. PARASITIDAE Oudemans, 1902 1. Parasitus kraepelini Berlese, 1903 It belongs to the group of free living mites. It occurs in forest litter humus, poppylead, etc. but also frequently in the nests of small subterranean mammals, rarely in their costs (MRCIAK, DANIEL and ROSICKY 1966). This species is known from many countries of Eurasia. 2. Poecilochirus necrophori Vitzthum, 1930 Necrophagous species occurr very rarely in acarofauna of small subterranean mammals on which it occurs only accidentaly (ROSICKY and MRCIAK 19 67). It occurs frequently on some beetles. P. necrophori is known in many European countries. From point of view of public health it is known as a mechanical vector of different microorganisms: Proteus morgani, P. vulgaris, Bacterium pyocyaneum, Monococcus, Staphylococcus albus, Bacterium antracoides, etc. (PETROVA, 1964). Fam. MA CROCHE LIDAE Vitzthum, 1930 3. Macrocheles glaber (J. Müller, 1860) Coprophagous species occurr frequently in faeces of cattle and on beetles of genus Geotrupes which occurs frequently here. Accidentaly it occurs on small mammals, actively or passively transferred to their nests. M. glaber belongs to the most frequent species of this family in the European fauna. Fam. RHODACARIDAE Oudemans, 190 2 4. Euryparasitus emarginatus (C. L. Koch, 1839) Nidicolous species live abundantly in the nests of different species of small subterranean mammals where its development occurs. It occurs rarely on the coat of small mammals mainly as deutonymph. E. emarginatus is distributed over whole Europe. BALOGH (1955) reported it from Hungary. Fam. ASCIDAE Voigts et Evans, 1905 5. Proctolaelaps pygmaeus (J. Müller, 1860) This species belongs to the group of predators which live in storage facilities, where sometimes, when density is high.it occurs on the coat of rodents riving in farmhouses (storerooms, granaries, forage-rooms etc. (MRCIAK, 1963, 1974). Sometimes it occurs also in the nests of rodents and their inhabitants. It is reported from Hungary by BALOGH (1955). Fam. DERMANYSSIDAE Kolenati, 1859 6. Myonyssus rossicus Bregetova, 1956 BREGETOVA (1956) supposed that M. rossicus has the greatest affinity to the yellow-necked mouse (Apodemus flavicollis). Our findings also confirm this supposition. BALOGH (1955) noted'the finding of Myonyssus gigaB and added that it has an affinity to the genera Apodemus and Clethrionomys. Its occurrence on the coat of hosts and in their nests is only accidental. The species was found in Hungary by MAHUNKA and MOLNOS (19 62).