They are black with an orange oblique band of the forewing ( also found in " Isapis " and many other Riodinidae " Mesene ", " Aricoris ", " Chamaelimnas ", " Melanis " etc ) . They are rather strongly built and exceptionally good flyers and also sometimes fly about in day-time, the flight being somewhat like that of moths, so that they are difficult to distinguish from quite a number of similarly coloured species of Geometridae and Arctiidae found at the same places.