Catharina, describes the southern form of the collective species, in the female recognizable at once by the almost uniformly large yellowish submarginal spots, which mostly extend from the anal angle to the apex, whilst in aega and mellinia they do not reach beyond the median part of the forewing.

The ground-colour of the yellow female much paler, on the hindwing without brown tinge; the submarginal patches of the forewing more uniform, forming a more complete row.

Whilst the males before me from Rio de Janeiro, Parana and Blumenau show inter se no differences worth mentioning, the males of bisanthe from Rio Grande do Sul can be at once separated from their more northern representatives by the predominantly white-grey instead of purple-brown under surface, which in addition is traversed by more sharply defined, i.e. more strongly black-bordered and consequently more distinct, grey-white or pale yellow longitudinal bands.

Thus in the north Espírito Santo with an almost uniform hot, damp climate all the year round, which produces a continuous, vast forest area covering the still almost unknown interior of the province, has a deep-coloured, one might say rainy-season form.

Of the rare females about 10—15 are found to males Burmeister knew an aega race with blue females from the Missiones in the state of Argentina, discovered there by Carlos Berg[1] The larvae feed on Gramineae (Arundo mitis, Bambusa, Bambusa trinii, Chusquea, Chusquea meyeriana, Merostachys claussenii) Aega was a daughter of Helios and of such dazzling brightness that the Titans in their attack upon Olympus became frightened and requested their mother Gaia conceal her in the earth.