The Rivellia here have only three distinct wing markings, these being two strong bands over the crossveins and the apical semi-circular spot. The wing base is weakly yellowish, and with a small indistinct subbasal spot situated immediately below the bifurcation of R2+3 and R4+5. The femora and tibiae are largely blackish (the ‘knees’ yellowish brown), the former with metallic green reflections. Macquart (1851) described a similar species, R. nigripes, though the description is brief and the species not discussed by subsequent workers. Macquart’s species probably differs at least by the lack of the subbasal small wing spot and femora lacking metallic green reflections.
The following flies have been infected and killed by an entomopathogenic fungi. (Explore muscid flies (house flies) with similar imfections.)