Adephagous and Clavicorn Coleoptera from the Tertiary Deposits at Florissant, Colorado, with Descriptions of a Few Other Forms and a Systematic List O (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 edition. Excerpt: ... the sides arcuate, the angles obtuse, the disk apparently almost smooth, but very faintly and delicately punctate. Middle tibiae slender and equal, much smaller than the apex of the femora. Elytra together but little longer than broad, somewhat wider than the thorax, the sides somewhat arcuate, the surface delicately, not very deeply, striate, with regular very elongate impressions; interstitial spaces apparently sericeous. Length, 8 mm.; breadth, 4.1 mm.; length of antennae, 2.1 mm.; of thorax, 1.5 mm.; of elytra, 4.9 mm. Florissant, Colorado; one specimen, No. 12039. STAPHYLINIDE. One hundred and thirteen fossil species of Staphylinida? are known or indicated, sixty-five from the Old World, forty-eight from the New. These are almost entirely from the older Tertiaries, only seven species, all extinct, being known from the Pleistocene, two from Europe, five from America; besides these a number of other forms from the Canadian Pleistocene still await study.1 These fossil species have been referred to forty-two genera, of which four are regarded as extinct, three in the Old World, one in the New. Twenty-five of these genera are found in America, twenty-nine in the Old World, twelve occurring in both. Only two genera, one on each continent, have been found in the Pleistocene and not in the older Tertiaries. One of the peculiarities of the Florissant Staphylinidae as compared with living forms is the prevalence of species with short antennae. This is most marked in cases where the species, living and extinct, of the same genus are compared, and being nearly universal can hardly be referred to their being in some cases only partially exposed in the fossils, since in verv many all the joints can be seen, and the peculiarity still holds true....