Bumble Bees of the Western United States - USDA Forest Service

Table of Contents3 Table of Contents4 Foreword5 About the Authors6 Introduction10–12 Bee Diagrams13–15 Methodology16–17 Measuring Face Characteristics and Color18 Species Guides (color coded)18–81 Long- or square-cheeked bees with a rounded angle on the mid leg82–109 Short-cheeked bees with a rounded angle on the mid leg110–125 Long-cheeked bees with a sharp angle on the mid leg126–137 Bees with hind leg outer tibial surface convex and uniformly hairy (cuckoo bumble bees)138 Identification Key142 Acknowledgements143 Web and Other ResourcesGuide toBumble Beesof theWesternUnited StatesBumble Bees of the Western United States 3