_Winter._--Dowitchers occur in winter as far south as Ecuador and Peru. Dr. Frank M. Chapman (1926) referred the birds collected in Ecuador to _scolopaceus_. Nonbreeding birds, or immatures, remain there all summer, as they do in other parts of their winter range. I have taken both forms of dowitchers in Florida, where they winter regularly in small numbers. DISTRIBUTION _Range._--North America, Central America, Cuba, and northwestern South America. Casual in Japan. _Breeding range._--North to probably eastern Siberia (Cape Wankarem); Alaska (Kuparuk River and Point Barrow); probably Yukon (Herschel Island); and Mackenzie (Franklin Bay). East to Mackenzie (Franklin Bay). South to Mackenzie (Fort Anderson); Yukon (Lapierre House); and Alaska (Point Dall). West to Alaska (Point Dall, Pastolik, St. Michael, and Kowak River); and probably eastern Siberia (Cape Wankarem). _Winter range._--North to California (Los Banos and Santa Ana); Texas (Corpus Christi); Louisiana (State Game Preserve); Florida (East Goose Creek, Kissimmee, and Cape Canaveral); and probably Cuba (Santiago de Vegas and San Fernando). East to probably Cuba (Santiago de Vegas); Costa Rica (Alajuela); and probably Panama, Colombia, and Ecuador. South to Ecuador. West to Guatemala; Tehuantepec (San Mateo); Jalisco (La Barca); Lower California (La Paz, San Jose Mission and San Quentin); and California (San Diego and Los Banos). _Spring migration._--Early dates of spring arrival are: South Carolina, near Charleston, April 30; New York, Long Island, March 20; Illinois, Cary's Station, April 24, and Chicago, April 28; Minnesota, Heron Lake, May 1; Kansas, Manhattan, April 21, and Wichita, April 28; Nebraska, Callaway, April 8, and Omaha, April 28; Iowa, Wall Lake, May 9; South Dakota, Brown County, April 14, and Harrison, April 15; North Dakota, Menoken, May 7; Manitoba, Shoal Lake, April 24, Pilot Mound, May 1, and Margaret, May 18; Colorado, Loveland, April 6, Denver, April 26, and Durango, April 30; Wyoming, Cheyenne, May 2, and Lake Como, May 5; central and northern California, Alameda, March 15, Palo Alto, April 17, Ballona, April 19, and Stockton, April 20; Oregon, Malheur Lake, April 20; Washington, Menlo, May 1, and Fort Steilacoom, May 5; British Columbia, Courtenay, April 28, and Chilliwack, May 8; and Alaska, Craig, May 2, Kuiu Island, May 3, Fort Kenai, May 4, and St. Michael, May 20. Late dates of spring departure are: Louisiana, New Orleans, March 20; Texas, Corpus Christi, April 20; Chihuahua, Lake Palomas, April 9; Lower California, Gardner's Lagoon, April 19; and southern California, Santa Barbara, May 2.