Dr. Murai Éva szerk.: Parasitologia Hungarica 22. (Budapest, 1989)

MATERTALS AND METHODS We monitored the fly breeding sites of a caged-layer house of a co-operative farm (Rákosmezeje MGTSz, Budapest) inside and under the feed container outside (Fig. 1). Samples were taken three times, in July, August and October 1987. The house is fully closed and it contained about 25 000 layers kept in wire-cages. The manure and feed refuses accumulated on collecting plates beneath the cages, which were daily cleaned by tractor-mounted scrapers. Manure samples including feed refuses were collected from those areas where fly larvae could be seen. Samples (cca 200 g each) were kept in laboratory at 27± 3 °C and wetted if needed. The emerged imagoes were identified and counted. RESULTS AND DISCUSSION In the course of our study aimed to mapping the breeding sites of dipterous larvae a lot of places with developing larvae were found, despite daily removal of manure. The primary breeding sites were on collecting plates under both ends of the upper tiers. On these areas huge amount of manure and feed refuses were accumulated by the scrapers which cannot reach and clean these parts of the plates satisfactorily. All the feed refuses under the feed container outside the house were also found to be important fly breeding sites. Table 4 Flies emerging from manure samples of a caged-layer house (Budapest, 1987) Species Date of sampling Number of flies Species July August October Number of flies Psychoda alternata Say, 1824 _ _ 24 24 Coboldia fuscipes (Metgen, 1830) 13 101 2 116 Meroplius stercorarius (Rob.-Desv., 1830,) 1 1 Drosophila funebris (Fabricius, 1787) 9 39 48 x

Drosophila repleta Wollaston, 1858 1 66 8248 8315 Coproica hirtula (Rondani, 1880) 49 49 Coproica vagans (Haliday, 1833) 1 1 Leptometopa latipes (Meigen, 1830) 11 11 x

Muscina stabulans (Fallén, 1817) 8 2 10 x

Musca domestica Linnaeus, 1758 140 39 179 x

Hydrotaea ignava (Harris, 1780) 55 47 102 x

Stomoxys calcitrans (Linnaeus, 1758) 2 2 4 x

Fannia canicularts (Linnaeus, 1761) 285 75 39 399 Fannia leucosticta (Meigen, 1838) 14 1 15 Hylemya sp. 1 1 Number of flies: 518 405 8352 9275 Number of samples: 11 15 12 38 Of veterinary importance