Helina addita is a largely black species with lighter pruinescence. The legs are bicoloured with at least the hind tibiae tawny and females have femora broadly yellowish apically. The haltere knobs are yellowish and the wing crossveins are clouded. The antennae are black and the arista are not noticeably plumose. There are 4 pairs of postsutural dorsocentral bristles and no well developed presutural acrostichal bristles. Bodylength around 6.5mm. Helina nigritarsis is most similar but slightly larger at around 8mm and males have femora broadly yellowish apically while females have femora entirely yellowish. Helina poeciliventris is also similar but have the legs entirely black.