Cooke — Birds of the Washington Region. 13 



Bicknell's Thrush (Hylocichla minima minima). — October 3, 1885 (Rich- 

 mond MS.); May 14 and 18, 1888 (Spec. U. S. Nat. Mus.); May 17, 1892 

 (E. A. Preble); May 24, 1893 (E. A. Preble). 



Hypothetical Species. 



Sooty Shearwater {Puffinus griseus stricklandi) . — " Puffinus cinereusirom 

 Potomac River," a specimen presented to the National Institute for the 

 Promotion of Science at the meeting, September 12, 1842, ^ is probably 

 referable to this species. This record is very likely the basis for the in- 

 clusion of the Audubon Shearwater in previous Washington lists. 



Prairie Chicken {Tympanuchus americamis americanus). — A speci- 

 men taken March 17, 1885, was undoubtedly an introduced bird, as about 

 that time birds taken in the west were liberated in Kent County, Mary- 

 land. 



iProc. Nat. Inst. Prom. Sci., Bull. Ill, 1842-45, p. 251. 



