The Entomologist, 1890, Vol. 23

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Excerpt from The Entomologist, 1890, Vol. 23: An Illustrated Journal of General EntomologyLet us first take the Hymenoptera, which form so many galls. The North American oak galls, formed b species of Cynipidee, afiord every gradation of character. They maybe divided into sections, the galls 1n the first section being so essen tially part of the branch that they cannot be removed Without taking away part of the branch or twig with them. The second section comp rises galls on the branches, but of a difierent substance from the branch, so that they can be removed without taking a portion of the branch with them. Then of leaf galls we have agam two sections, one consisting of galls which cannot be separated from the leaf, the other of galls which are separable from the leaf-tissues. Finally, there is a section comprising galls on the roots.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.