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.
Genus KRICOGONIA Reakirt
PL. CIII
Medium-sized butterflies, whitish or yellow on upper side, with some dark markings, especially in the male; fore wings somewhat falcate.
The genus is confined to the New World; one species occurs in our territory.
(1) Kricogonia lyside (Godart), form terissa (Lucas), [Plate CIII], Fig. 1, ♂; Fig. 2, ♀ (Godart’s Sulphur).