Phoebis neocypris, the tailed sulphur, is a butterfly in the family Pieridae. It is native to Mexico, Central America, and South America. There is a record for one stray in southern Texas. The habitat consists of tropical areas, especially in mid-elevation forests as well as open and disturbed areas. The wingspan is 39 - 44 mm. Males are orange and females are whitish or yellowish. Both have a triangular extension on each hindwing. Adults are on wing all year round in Mexico and Central America. They are on wing in September in southern Texas. They feed on flower nectar of various flowers, including Lantana and Impatiens species. The larvae feed on fresh leaves of Cassia species.