Excerpt from Contributions Toward a Monograph of the Scolytid Beetles: The Genus Dendroctonus, Preliminary Classification of the Superfamily Scolytoidea Preliminary classification OF the supermmily scolytouma - (joutd. Taxonomy Morphological characters Superfamily characters Family characters. Subfamily characters Generic characters. The antennae. The eyes. The mouth parts Characters in general The body. Form. Color Vestiture. Sculpture Armatu res. Head Prothorax Mesothorax. Metathoi'ax Legs Elytra. Posterior Wlngs Abdominal tergites Abdominal Spiracles Abdeminal sternites. Stridulating accessories I ntefnal anatomy Digestive system Proventriculus. Reproductive organs The reproductive organs of the male Posterior elements Anterier and median elements. Variations and combinations of the elements. Terminology of the reproductive organs. Classifications based on the reproductive organs Secondary sexual characters The pupae The larvae The eggs The embryo Physiological characteristics General habits Classification according to habits Food habits of the adults Food habits'of the larvae Pupal habits Flight habits. Social habits. Galleries Terminology of the galleries. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.

Excerpt from Preliminary Classification of the Superfamily Scolytoidea It is evident that the scolytoid beetles could not have been derived from the highly differentiated carabids or scarabaeids and that these groups could not have been derived from any existing group of the Rhynchophora.. It is also evident that the Species in the two primary divisions of the Coleoptera which may be the nearest representatives Of their primitive ancestors are themselves so highly differentiated from one another and from ancestral forms of Coleoptera that they can not be recognized, or, if they could, they would be of little or no use as a basis for Speculation on the origin and evolution of the order; then, too, we have no material in fossils on which to base a reliable hypothesis, because only the highly specialized forms have been pre served. 'therefore we must rely on facts as they exist and endeavor to discover and interpret the elements of distinction and relationship which have survived in the course Of their evolution, under the influ ence of natural selection, dominant differentiation, and progressive and parallel evolution. The writer's interpretation of these facts, SO far'as they apply to morphological characters and the distinction of groups and Species, will be expressed in the tables of families, sub families, genera, and Species, in the succeeding contributions toward a monograph, as will also the progressive modification of characters indicative of the lines of divergence from one extreme toward the opposite. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.