Male N. marshamella are difficult to identify when compared to N. fulvicornis but the yellow markings on the eye and tergite 1 are less extensive, there is some brown on the tegulae and it has longer antennae.

[1] Nomada marshamella is endemic to the western Palearctic ecozone from Britain and Ireland in the west east to Turkey, north to southern Finland and on the islands of Corsica and Malta.

It is also thought that N.marshamella may parasitise Andrena ferox, A. stragulata, A. trimmerana, A. nigroaenea and A. haemorrhoa, in the Czech Republic A. rosae has also been recorded as a host of N.

[1] It is a highly polylectic species of bee in which the adults exploit a wide variety of flowers at different levels from ground to canopy for their nectar.

The host of the bivoltine form is not known for certain but it may attack both broods of A. trimmerana and late nesting A. carantonica and A. nigroaenea, both the latter species having a single, greatly extended flight period.