Résumé :
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Between 1913 and 1940 Karl Escherich wrote Volume 1, 2, 3, and 5 of his textbook and manual « Forest Insects of Central Europe ». Of this classical work, dealing with practical entomology, Volume 4 referring to hemimetabolic insects and the remaining type of butterflies has never been published. Over the years it has become obvious that a revised edition was necessary on this subject, so important to science and practice. But the extent of present knowledge regarding forest pests and the needs of modern forest protection required a completely different approach to the subject. The new work, therefore, is published not as a textbook but purely as a manual, and has contributions from numerous specialists from Germany and abroad. The manual will not only deal with insects but with all other animal genera which are forest pests. For the first time it refers to the whole of Europe. In taxonomical order the following volumes are published at intervals of at least one year: 1. Worms, snails, mites, millepeds, and hemimetabolic insects; 2. Beetles; 3. Butterflies; 4. Otherholo-metabolicinsects; 5. Vertebrates. The third volume deals with the butterflies (Lepidoptera), an order of great importance for forestry which has as yet received no comprehensive treatment in Europe. Its extensive division into 30 harmful European families has necessitated the joint international collaboration of 16 forest-entomologists. Coleophoridae, Yponomeutidae, Tortricidae, Aegeriidae, Pyralidae, Geometridae, Noctuidae, Lymantriidae, Thaumetopoeidae, Notodontidae and Lasiocampidae form the main body of the work. The major pests Bupalus piniarius, Panolis flammea, Lymantria monacha and Lymantria dispar are given especially thorough treatment.
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