The small leafmining moth, Phyllocnistis citrella Stainton, was discovered in citrus nurseries in Homestead, FL, on 20 May 1993. During the remainder of 1993, this serious Old World pest of citrus leaves spread to the Florida citrus growing area. By September 1994 it had spread throughout Florida and through much of the Caribbean region, including eastern Mexico; it also had reached southern Louisiana, southern Alabama, and Brownsville, TX. Potential future distribution in the southeastern United States probably will include Gulf Coast areas where winter frost is not severe, with a summer range possibly as far north as tidewater Virginia, wherever homeowner citrus may be found.