Species of the endemic New Zealand ladybird genus Adoxellus Weise, 1895 are revised. Male and female genitalia are illustrated for the first time, a key to species, images of larva and pupa and distribution map are provided. A lectotype for Scymnus flavihirtus Broun, 1880 and a neotype for Scymnus picinus Broun, 1880 are designated.