S. Mahunka szerk.: Folia Entomologica Hungarica 27/1. (Budapest, 1974)
flies are not enough to determine the qualitative composition of the fly community of the corral. This fact indicates the most difficult problem of the study of flies developing in any kind of manure: as compared to that of other studies on flies, a tremendous number of specimens of hardly separable species must be identified. Flies were collected on some horse droppings which were found near the colt stables and corrals x , and they were reared also from two samples. It was made as a part of a series of mvestigati on s intending to clarify the gradual filling with flies and their larvae of the droppings of ungulate domestic animals. As expected from earlier investigations, the fly community of the horse droppings consisted only partly of obligate species of horse-droppings, the others derived from the flies of corrals and of the stables, respectively. A comparison of the individual samples reveals that a material of a greater number of flies is needed, while satisfactorily ipterpretable rearing results can be derived only from considerably more samples (in one of them, the zoophagous larvae of Pyrellia ignita ROB T-DESV. destroyed all other fly larvae; in the second one, only a few specimens emerged) (cf. PAPP, 1971). Nevertheless, the results obtained are very interesting. Thus, 21 specimens.of C . (Borborillus) somogyii L. PAPP were caught, a species described from Mongolia; also, Coproica dentata L. PAPP, described on the basis of specimens collected on horse droppings at Csévharaszt (Hungary) and in Mongolia, was also captured. Since these two easily determinable species have not been discovered in other European countries in spjte of rather thorough investigations (DUDA, RICHARDS, HACKMAN), probably reach the limit of their distribution in Hungary; as both of them develop in horse droppings, one of the possible explanations of this singular range is that they were introduced by human agency from their probable Central Asian gene centre as far West as to our country during the centuries of the great migrations or later. Ischiolepta oedopoda L. PAPP, described on the basis of a male specimen caught on horse dung at Csévharaszt and later also in Mongolia, was not found in the present material. In addition to these, exemplars of a new sphaerocerid species were collected in considerable number on horse droppings, to be described as follows: Copromyza (BorboriUus) szelenyii sp . n . Very simila^ to C. ( Borborillus hispanica DUDA, 1923 (with genal bristle weak, postocular, setulae in one row, inner occipitals absent, 1 strong bristle on av side of hind tibia, mti of males with 1 distaloventral tooth, wings not browned, t a-tp and terminal section of m equal in length, only 1 h and 1 dc pair of bristles each, thorax black, sterno-andmesopleurae shiny black, frons anteriorly with red margin), differring in structure of male postabdomen and in shape of female sternites. Male hypopygium less convex and smaller than in hispanica (Fig. 4, 5 cf. Fig. 3), this difference even more striking in live specimens; male valvula medialis somewhat more stout, its valvula lateralis (Fig. 7) rather similar to that of hispanica males (Fig. 6) Horse droppings were covered quickly with a very close-meshed net and, by slightly raising the top of the net, the frame lying on the ground was slightly shaken. In this way also the bad fliers were captured, those which sprang or flew onto the net and then climbed upwards in it. Netting above the droppings results only in few flies and captures a very incomplete fauna.
