a thickening of the basal half of the median vein on the forewing. Female Upperside: Very similar to that of the male but without the sex-mark; the black areas on both forewings and hindwings slightly broader, with the inner edge of the black terminal band on the hindwing often diffuse. Females also have a reduced patch of ultraviolet-reflecting scales located in the proximate region of the dorsal forewing. The mechanism responsible for this colouration is the same as in males but the reflectance is less bright. Underside: ground colour and markings as in the male. Antennae, head, thorax and abdomen similarly coloured. Dry-season form Upperside: ground colour and markings much as in wet-season specimens, the emargination on the inner side of the black area and the tornal dilatation on the forewing similar. On the hindwing, in the great majority of individuals, the black terminal band is also similar; in a few it is narrower and diffuse inwardly in both sexes. Underside: ground colour similar to that in wet-season specimens, but very many have a greater or less irroration of black scales over the yellow parts of the wing; the reddish-brown markings on both forewings and hindwings are also similar, but the spots are larger, more clearly defined, darker, and therefore far more conspicuous. In addition, on the forewing there is a preapical, very prominent, transverse, elongate spot or short bar or reddish brown extended downwards from the costa. This spot is irregular in shape and of variable width, but does not seem to ever spread outwards to the actual edge of the termen. In a few specimens there is also a small reddish-brown spot in interspace near the tornus. Antennae, head, thorax and abdomen, and in the male, the sex-mark, as in wet-season specimens. Life cycle Eggs are laid on Abrus precatorius, Falcataria moluccana, Acacia sp., Aeschynomene species and numerous other Leguminosae, Euphorbiaceae and Cucurbitaceae sp.. Studies suggest that the females can discriminate colours when choosing host plants for oviposition. Larva: "Long, green, rough, cylindrical, or slightly depressed, with a large head." Pupa: "Suspended by the tail and by a moderately long band; the abdominal segments are round, but the thorax is much compressed, the wing-cases uniting to form a deep sharp keel. The head-case terminates in a short pointed snout. Ordinarily the pupa is solitary and green, but sometimes on a twig in large numbers. Many Pierine and other