These large and boldly patterned bees are cleptoparasites, primarily of Long-horned Bees. 6 species are known from Vermont, but most have fewer than 5 records. A few of the rarest species are easily identifiable from photos.
Genus level ID – These black and white bees form a distinct group with Cellophane-cuckoo Bees (Genus Epeolus). Some species in both genera are distinctive, but other individuals are hard to assign to genus from photos. Long-horn Cuckoo Bees tend to be larger, but again there is some overlap.
Unless otherwise specified, photos are courtesy of Margarita Miklasevskaja at PCYU with funding from NSERC-CANPOLIN.