This study (1) displays markings pattern of male and female specimens of Arctia tundrana from various parts of its broad range; (2) illustrates a paratype male specimen of this species with its genitalia and aedeagus; (3) presents a few additional occurrences of A. tundrana supplementing the data set published in our earlier paper (Bolotov et al. 2015); (4) provides an updated map of the species’ occurrences; and (5) discusses its imaginal phenology based on long-term occurrence data.