Anthophora bomboides, male, Allegany County, Maryland. (Photo and caption by Sam Droege/USGS Bee Inventory and Monitoring Lab)

Centris fasciata, Cuba. (Photo and caption by Sam Droege/USGS Bee Inventory and Monitoring Lab)

Eugloss dilemma, male, Florida, Biscayne National Monument. (Photo and caption by Sam Droege/USGS Bee Inventory and Monitoring Lab)

Megachile lanata, female, GTMO, Cuba. (Photo and caption by Sam Droege/USGS Bee Inventory and Monitoring Lab)

Centris, U, face, Dominican Republic. (Photo and caption by Sam Droege/USGS Bee Inventory and Monitoring Lab)

Bombus griseocollis, M, face, Philidelphia, PA. (Photo and caption by Sam Droege/USGS Bee Inventory and Monitoring Lab)

Osmia chalybea, M, face, Georgia, Camden County. (Photo and caption by Sam Droege/USGS Bee Inventory and Monitoring Lab)

Megachile fortis, U, face, Jackson County, South Dakota. (Photo and caption by Sam Droege/USGS Bee Inventory and Monitoring Lab)

Holcopasites heliopsis, U, face, Maryland, Anne Arundel County. (Photo and caption by Sam Droege/USGS Bee Inventory and Monitoring Lab)

Melecta species, face, Park County, Wyoming. (Photo and caption by Sam Droege/USGS Bee Inventory and Monitoring Lab)

Male, Anthophora plumipes, introduced into Maryland from Japan in the 1980s. (Photo and caption by Sam Droege/USGS Bee Inventory and Monitoring Lab)

Hylaeus modestus, M, Face, VA. (Photo and caption by Sam Droege/USGS Bee Inventory and Monitoring Lab)

Augochloropsis metallica, F, Face, Laurel, Maryland. (Photo and caption by Sam Droege/USGS Bee Inventory and Monitoring Lab)