12 Proceedings of the Biological Society of Washington. 



Prothonotary Warbler (Protonotaria citrea). — One or two noted in 

 twelve different years, the earliest date of arrival being April 26, 1916 

 (R. W. Moore); the average of 9 years' records, May 4. Twice noted in 

 June, possibly breeding. 



Brewster's Warbler (Vermwora leucobronchialis) (hybrid). — -May 8, 

 1885 (W. Palmer); May 1, 1895 (Spec. U. S. Nat. Mus.). 



Lawrence's Warbler (Vermivora lawrencei) (hybrid). — May 12, 1907 

 (W. H. Osgood). 



Orange-crowned Warbler (Vermivora celata celata). — October 13, 1889 

 (H. W. Henshaw) ; October 14, 1894 (W. Palmer). 



Northern Parula Warbler (Compsothlypis americana pusilla). — A com- 

 mon migrant, but the records are in most cases not separable from those 

 of the Parula Warbler. May 26 and 30, 1905 (H. C. Oberholser) ; May 

 9, 1912 (W. L. McAtee); May 12, 1913 (H. C. Oberholser); October 5, 



1917 (M. T. Cooke). 



Cerulean Warbler (Dendroica cerulea). — October, 1859 (Spec. U. S. Nat. 



Mus.); May, 1861 (Spec. U. S. Nat. Mus.); May 5, 1888 (E. M. Has- 



brouck); May 11, 1890 (E. M. Hasbrouck); May 12, 1899 (Richmond 



MS.); May 29, 1902 (Richmond MS.); May 9, 1904 (W. W. Cooke); May 



15, 1904 (A. K. Fisher); May 3 and 11, 1907 (W. W. Cooke); May 13, 



1909 (R. W. Shufeldt). 

 Kirtland's Warbler (Dendroica kirtlandii). — September 25, 1887 (W. 



Palmer) . 

 Palm Warbler (Dendroica palmarum palmarum). — Probably occurs every 



year in migration, but is not distinguished from the Yellow Palm Warbler. 



Has been noted in spring from April 22, 1885 (Richmond MS.) to May 



20, 1917 (McAtee and Holt) ; and in autumn, from September 18, 1887 



(Richmond MS.) to October 11, 1861 (R. Ridgway). 

 Grinnell's Water-thrush (Seiurus noveboracensis notabilis). — May 11, 



1879 (W. Palmer); May 5, 1885 (W. Palmer) ; August 5, 1886 (Richmond 



MS.). 

 Northern Yellowthroat (Geothlypis trichas brachidactyla) . — Abundant 



in migration but is not distinguished from the Maryland Yellowthroat; 



September 23, 1902 (C. W. Richmond) ; May 11, 1917 (M. T. Cooke). , 

 Bewick's Wren (Thryomanes bewickiibewickii) . — Has been noted in spring 



in fourteen different years, the earliest date of arrival being March 26, 



1897 (Richmond MS.), and the average, April 8; accidental, February 8, 



1918 (J. H. Riley) ; twice noted in autumn, November 11, 1889 (Richmond 

 MS.) ; December 22, 1890 (C. W. Richmond) ; although it has been noted 

 in summer, it has never been known to nest. 



Short-billed Marsh Wren (Cistothorus stellaris). — May 9, 1890 (E. M. 

 Hasbrouck); May 3, 1893 (W. Palmer). 



Black-capped Chickadee (Penthestes atricapillus atricapillus) . — January 

 1, 1859 (Spec. U. S. Nat. Mus.); December 10, 1859 (Spec. U. S. Nat. 

 Mus.) ; December 24, 1876 (W. Palmer) ; December 25, 1878 (W. Palmer) ; 

 January 2, 1879 (W. Palmer) ; February 2, 1879 (Richmond MS.) ; com- 

 mon, February 21, 1885 (H. W. Henshaw)— April 19, 1885 (W. Palmer); 

 April 19, 1896 (H. W. Henshaw); October 19, 1896 (Richmond MS.). 



