U.S. Fish & Wildlife Service Grant/Contract No: #101816M577, #101816M577Purpose of Research: To investigate the role of pathogens, particularly microsporidia, as a factor in the decline of Bombus franklini, B. occidentalis, and B. pensylvanicus. This project, US Fish & Wildlife Purchase Order #101816M577, provided a second season of collections (following project PO #134205M090) of Bombus spp. in the midwestern and northwestern U.S. We continue to gather information leading to understanding the potential role of pathogens in the decline of Bombus species in the western and Midwestern United States.INHS Technical Report Prepared for U.S. Fish & Wildlife Servic