The Anthocoridea, or flower bugs, are economically important as a group because they prey on other arthropods. They have, however, received very little attention in North America. The group is poorly known, the species are poorly represented in collections, and much confusion exists in naming the species. Therefore, special efforts were made recently to collect them from across Canada and in the United States. As a result of these collections and subsequent study of the group, several new species were described and European introductions were reported by the author. The range and distribution of the known species were expanded and new information on their habitats and ecology have increased the knowledge of the group. The aim of this report is to help the economic entomologists and other field workers to recognize this important group of predators, often encountered in field surveys and control programs.