We owe the establishment of this genus to Mr. Swainson. It includes
a considerable number of species, the greater proportion of which
have been but lately discovered. They are small insects, of delicate
structure, and usually of a light yellow colour, with the apex of
the upper wings deep black. The caterpillars, as far as we are
acquainted with them, are attached to leguminous plants, and live
between the tropics both of the old and new world. The most important
generic characters are the following: antennæ of moderate length, the
articulations pretty distinct, terminating in an ovoid or conical club,
which is slightly curved downwards, and compressed laterally: palpi
very short, the terminal joint half the length of the preceding one,
naked, and a little salient; abdomen slender and compressed, nearly
as long as the inferior wings; wings of delicate texture, the costal
line a good deal arched towards the base. Caterpillars slender, linear,
and pubescent; chrysalis a little arched, and somewhat compressed,
terminating in a point anteriorly.