Genus Catopsilia Hübner (the Great Sulphurs)
Large butterflies; brilliant lemon-yellow or orange-yellow marked with a few darker spots and with a narrow band of brown, especially in the female, on the outer margin of the fore wings. Very quick in flight. Eggs spindle-shaped and acutely pointed, vertically ribbed. Caterpillars relatively long, head small, segments resembling beads strung together, surface covered with minute papillæ in transverse rows. Chrysalis concave dorsally, head conical, projecting, wing-cases compressed, forming a wide keel-shaped projection on ventral side.
The genus is mainly tropical; one species, however, ranges as far north as Long Island and western Pennsylvania.
(1) Catopsilia eubule (Linnæus), Plate CII, Fig. 1, ♂; Fig. 2, ♀ (The Cloudless Sulphur).
Well depicted in our plate and requiring no special description. Expanse 2.50 inches. The caterpillar feeds on leguminous plants, preferably the species of Cassia.