They are smaller than our indigenous leafcutting bees (5 to 9 mm long, rather than 9 to 20 mm). They are stocky, with broad heads, and females have a ventral brush of short, stiff silver-grey hairs under the abdomen.
Leafcutting bees are stocky bees with black bodies (often with furry, lighter coloured bands on the abdomen) and broad heads. The species in Quebec are 5 to 20 mm long. Their two pairs of wings are transparent. Females have a ventral brush under the abdomen, with short hairs. Males are generally smaller than females.