In this richly illustrated guide, Bees of Costa Rica, leading bee experts showcase the diversity of bees in Costa Rica and the myriad ways in which they interact with flowers and people. Costa Rica is home to 117 bee genera and approximately 700 bee species. Focusing on the five bee families present in Costa Rica, the authors describe the bees' general physical traits, foraging and mating behavior, and nest characteristics. Chapters cover the relationships between bees and other insects, profiles of plants pollinated by bees, and practical suggestions for bee conservation. With identification keys and more than 150 color photographs, Bees of Costa Rica is essential for anyone looking to learn about and protect these important pollinators in Costa Rica and beyond.

This book constitutes the refereed proceedings of the International Workshop on Policies for Distributed Systems and Networks, POLICY 2001, held in Bristol, UK in January 2001. The 16 revised full papers presented were carefully reviewed and selected from 43 submissions. Among the topics covered are abstractions and notations for policy specifications, security policies, access control, implementations, applications, quality of service, and management.