This is a well-illustrated treatment of and guide to all the fossil and present-day species of butterflies in one of the richest areas in North America for butterfly diversity and study. For much of the year, the meadows, forests, and grassy slopes of the Florissant region of central Colorado are alive with butterflies - nearly 100 species of these fascinating and beautiful creatures. Many of them have unusual life histories: the larvae (caterpillars) of one species take two years to mature; others develop close associations with ants; and the adults of some species live only a few days, whereas others survive for months in winter hibernation. Central Colorado is also the site of the florissant Fossil Beds National Monument, which has yielded 12 of the 44 known species of butterfly fossils in the world. To find fossils of these delicate-winged creatures in such a perfect state of preservation is one of the wonders of nature, since the fossils have endured 35 million years of geologic activity, erosion, and climate change. Remarkably, most of the fossil species are closely related to various present-day species.

Extract from the eighth annual report of the Director [of the U.S. Geological Survey], 1886-'87.

This comprehensive guide to the fossil butterflies of Florissant offers a fascinating glimpse into an ancient world. Featuring detailed illustrations and scientific analysis, this book is the definitive resource for entomologists and butterfly enthusiasts alike. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

The most diverse fossil bed in the United States provides a unique picture of what life was like 34 million years ago. In the rocks of Florissant, Colorado, lying in the shadow of Pike's Peak, is the evidence of a long-lost world. Encased by the ash of volcanoes that erupted tens of millions of years ago, animals such as insects, fish, and mammals were fossilized in the same deposits as flowers, trees, and the delicate leaves of plants. This amazing collection of animals and plants from the same place at the same time providse a rare, uniquely comprehensive glimpse of life in the past. Through more than 200 color photographs and vivid descriptions of the fossils, Herbert Meyer brings the fossils of Florissant, Colorado to life, not only providing background on the plants and animals, but also exploring the warm environment in which they lived. The site was once a treasure trove for paleontologists who acquired the fossils for museums around the world; it is now protected as Florissant Fossil Beds National Monument. Meyer’s book reveals the beauty of both the site and its delicate fossils, and offers a compelling story of life long ago.