Neofidelia are robust, medium-sized bees that range in body length from 9–12 mm (Michener 2007). They are black with dense and long light-colored hairs covering their body (Michener 2007). The basitarsi and tibia bear long setae that can resemble scopa; however, the setae are not used for pollen gathering and instead assist in throwing loosened substrates out the burrow during construction (Rozen 1973; Michener 2007). Pollen is carried with the scopa on the ventral surface of the metasoma as in most Megachilidae.
(modified from Michener 2007 unless otherwise stated)
Neofidelia may be confused with Fidelia due to similar female pygidial plates, but can be distinguished by the hind basitarsus and distance between the clypeus and antennal bases mentioned in the diagnostic characteristics (Michener 2007).
There are no known invasives.
Neofidelia females excavate branched, shallow burrows in the soil (Rozen 1973). The nest branches terminate in unlined cells that are widened and dug horizontally (Rozen 1973). Pollen provisions are moistened and packed into the end of each cell. The female uses her modified pygidium to sculpt the provisional mass into a dish-like shape and oviposits an egg into the convex mass (Rozen 1973).