This cleptoparasitic genus can be fairly common at some sites where their hosts are present. Eight species so far confirmed from Vermont, all of which are cleptoparasites of leafcutter bees (Megachile). Often found cruising low over areas of sparsely vegetated sand. Most species are thought to have several different host species.
Genus level ID: Females have distinctly pointed abdomen, while most males have an assortment of spines. All the VT species are superficially quite similar, but several species have distinctive characters that can occasionally be seen in photos.
Unless otherwise specified, photos are courtesy of Margarita Miklasevskaja at PCYU with funding from NSERC-CANPOLIN.