 There is, however, no abrupt change, intermediate specimens seem to link the most aberrant with the typical.Some of the specimens before me show also a tendency to the development of transverse series of dark subterminal spots on the underside of the forewing as in "N. kerriana", Distant.Female similar to the female of the typical form but on the upperside the iridescent blue at the base of the wings changes gradually to whitish on the disc and beyond the apex of cell.