_Breeding range._--The worm-eating warbler breeds =north= to northeastern Kansas (Lawrence); possibly central southern Nebraska (Red Cloud); probably south-central Iowa (Des Moines); probably southern Wisconsin (Wyalusing, Madison, and Milwaukee); northeastern Illinois (Hinsdale); southern Indiana (Terre Haute, Bloomington, and Indianapolis); central Ohio (Columbus, East Liverpool, and possibly Cleveland); southern New York (Penn Yan and Albany), and southern Connecticut (New Haven and Saybrook). It has been found in summer north to London, Ontario; Northampton, Ipswich, and North Eastham, Massachusetts. =East= to Connecticut (Saybrook); Long Island (Newtown); northern New Jersey (Elizabeth and Morristown); eastern Pennsylvania (Norristown and Philadelphia); northern Delaware (Wilmington); central Maryland (Baltimore; rarely east of Chesapeake Bay); eastern Virginia (Cobham and Dismal Swamp); central North Carolina (Chapel Hill and Statesville); northwestern South Carolina (Caesars Head, Mount Pinnacle, and Sassafras Mountain); and northern Georgia (Brasstown Bald and Atlanta). =South= to northern Georgia (Atlanta); central Tennessee (Nashville and Wildersville); northern Arkansas (Newport and Winslow); and, occasionally, extreme northern Texas (Bowie County and Gainesville). =West= to northern Texas (Gainesville); northeastern Oklahoma (Jay); and eastern Kansas (Lawrence). It has been recorded in summer, but with no evidence of breeding, at Red Cloud, Nebr., and at London and Vineland Station, Ontario. _Winter range._--In winter the worm-eating warbler is found =north= to southern Tamaulipas (Altamira); northern Florida, casually (Blue Springs and Amelia Island), and the Bahamas (Abaco, Nassau, and Great Inago). =East= to the Bahamas (Great Inago); Jamaica and central Panamá (Río Chepo). =South= to Panamá (Río Chepo, Barro Colorado, and Chiriquí). =West= to western Panamá (Chiriquí); Costa Rica (Escasú and Volcán Tonorio); El Salvador (Mount Cacaguatique); Guatemala (Dueñas, Patulul, and Naranjo); southern Chiapas (Huehuetán); western Veracruz (Jalapa); Hidalgo (Pachuca); and southern Tamaulipas (Altamira). _Migration._--Late dates of spring departure are: Panamá--Darién March 16. Costa Rica--El General, March 19. El Salvador--Barra de Santiago, April 8. Guatemala--Patulul, April 2. Yucatán--Mérida, April 9. Cuba--Habana, May 1. Bahamas--Abaco, April 29. Florida--Seven Oaks, May 14. Georgia--Cumberland, May 7. Alabama--Barachias, May 1. Mississippi--Biloxi, April 27. Louisiana--Avery Island, April 23.