Orb-weaving spiders spin the wheel-shaped webs often seen on dewy mornings in meadows and hedges, or on the walls and the eaves of buildings. This manual provides descriptions, illustrations, and taxonomic keys for the identification of the 94 species of these spiders represented in Canada and neighboring regions. Like the previous volumes in the series Insects and Arachnids of Canada this guide is destined to be extremely useful to both professional biologists and amateur naturalists. This volume covers collecting methods, anatomy, and reproduction in detail. Also present in this volume is a detailed discussion on the nature of spider silk the construction of orb webs, along with clearly presented maps, keys, and illustrations.