Kovács I. Endre szerk.: Rovartani Közlemények (Folia Entomologica Hungarica 16/22-30. Budapest, 1963)

national economy. Aside of the prognostic methods already introduced, we are now elaborating a forecast by light traps of lepidopterous pests, which will, after its successful conclusion, again render a considerable practical help to our agriculture. I can but heartily recommend the most interesting exhibition int this regard, shown in the Lepidoptorological Collection of the Natural History Museum. 3. The third important field where coenological investigations reaped an armful of results in hydrobiology

. Though this science is rather far from entomology, it still demands attention due toits great importance.lt was namely in hydrobiology that the basic steps of production biology were taken. We are proud to state that REZSŐ MAUCHA, OLGA SEBESTYÉN, and the late GÉZA EHTZ were the pioneers of hydrobiology in Hungary.The new generation of hydrobiologists are true followers, let it be the study of Lake Balaton,the investigation of the life of our rivers,or the painstaking solving of the problems of the production of fisheries. 4. As the fourth and the last, I have to mention soil biology, - always with the possibility that, considering importance, this branch of natural science may soon take one of the first places, among those of utmost practical importances. The greater or smaller rate of the biological degradation of soils is a world-wide aggravating problem. Though it may be early yet to talk of danger, alarming symptoms increased in the last two decades. Of the great pioneers of Hungarian soil biology, MANNINGER, FEHÉR, KREYBIG pointed out with prophetic clairvoyance the biological problems of the sustaining soil, and the present workers, led by L. VARGA and KEMENESSY, showed ihat the problems of tillage, dunging, and chemical fertilizing of the soils are, in the last analysis

,biocoenological ones,since it all turns on due respect being paid to the entirety of the beings