198 BULLETIN 196, UNITED STATES NATIONAL MUSEUM 



Winter range. — In winter Bicknell's thrush has been found only 

 on the island of Hispaniola (Morne Malanga, Haiti; and Puerto 

 Plata, Sanchez, Aguacate, and San Domingo, Dominican Republic). 



The gray-cheeked thrush continues to South America where it 

 occurs from the Santa Marta region of Colombia east through the 

 Orinoco Valley of Venezuela (Me"rida, Barinas, Caicara, and the 

 Mount Auyan-tepic region) to British Guiana (Kamakusa, the Kama- 

 rang River, and Bartica). It appears to winter at least casually in 

 the Cauca Valley of Colombia (Puerto Valdivia) ; on the east slope 

 of the Andes in Ecuador (Hacienda Machay in the province of Ambato 

 and the Rio Suno) ; and in eastern Peru (Chamicuras) . 



Migration. — The gray-cheeked thrush has an interesting migration 

 route. The records indicate that the birds breeding in Siberia 

 migrate through the Mississippi Valley of the United States. West 

 of the hundredth meridian the species is known only by a few (possibly 

 casual) records in eastern Wyoming and Montana, and there are 

 very few records from southern Alberta, and none from British Colum- 

 bia except north of the Peace River. It is apparently unknown in 

 Mexico except in the islands off the coast of Yucatan, and there is 

 one specimen from Guatemala; and several records for Cuba, Costa 

 Rica, and Panama. 



As many of the dates of migration are based on sight records, no 

 attempt has been made to separate the races. 



Some late dates of spring departure are: Colombia — Santa Marta, 

 May 3. Guatemala— Uaxactun, April 28. Mexico — Cozumel Island, 

 April 30. Bahamas— Cay Sal, May 19. Florida— Tortugas, May 

 22. North Carolina— Ashe ville, May 21. District of Columbia — 

 Washington, June 3. Texas — Cove, May 21. Louisiana — Shreve- 

 port, May 16. Missouri— St. Louis, June 4. 



Some early dates of spring arrival are: Florida — Pensacola, April 

 21. South Carolina — Aiken, April 24. Virginia — Lynchburg, May 

 5. District of Columbia — Washington, May 6. Pennsylvania — 

 Harrisburg, May 1. New York— Rochester, May 2. Massachu- 

 setts—Boston, May 14. New Hampshire —Hanover, May 17. 

 Maine— Do ver-Foxcroft, May 1. Quebec— Quebec, May 21. Lou- 

 isiana— Baton Rouge, April 22. Mississippi— Biloxi, April 21. Ten- 

 nessee — Memphis, April 23. Indiana — Indianapolis, April 26. 

 Michigan— Ann Arbor, April 25. Ontario— Hamilton, April 27. 

 Missouri— St. Louis, April 30. Wisconsin — Racine, May 2. Texas- 

 Houston, April 23. Nebraska— Red Cloud, April 29. North 

 Dakota— Fargo, May 4. Manitoba— Aweme, May 5; Churchill, 

 June 6. Alberta— Edmonton, May 13. British Columbia— Fort 

 St. John, May 13. Alaska— Kobuk River, near the mouth, May 24. 



