BIRDS OF A WA5-HINGTON CITY DOORYARD 9 



58. Stelgidopteryx serripennis serripennis. Rough-winged 

 Swallow. 



For this swallow, also, we have but a single date — May lo, 191 7. 



59. Progne suhis subis. Purple Martin. 



Occasionally seen from May to September. Our earliest date 

 is May 13, 1915, and the latest, September 3, 191 7. It is of most 

 frequent occurrence during the period of roosting; that is, during 

 August and early September. 



60. Setophaga ruticilla. American Redstart. 



Rather frequent from May 3 (19 14) to September 26 (1916), 

 and apparently the commonest warbler. September 26, it is of 

 interest to state, is an unusually late date for this species in the 

 vicinity of Washington , since the average date of autumn departure 

 is September 19, and the latest date is September 30, 1906. 



61. Wilsonia canadensis. Canadian Warbler. 



Observed on May 20 and 21, 1916, and May 27, 1917, but on no 

 other occasions. 



62. Wilsonia citrina. Hooded Warbler. 



For this beautiful species we have but a single record — May 24, 

 1914. 



63. Geothlypis trichas trichas. Maryland Yellowthroat. 

 One seen on April 24, 1917; and another, in spring, date un- 

 known, was reported by Miss May T. Cooke. 



64. Seiurus aurocapillus aurocapillus. Ovenbird. 



We have no exact date for this species, but once in spring Miss 

 May T. Cooke observed an individual that remained for two days 

 about her yard. 



65. Seiurus motacilla. Louisiana Water-Thrush. 



We noted a single individual on September 20, 19 14, a date 

 considerably later than the latest previously known for the 

 species anywhere in the vicinity of Washington, which is September 

 12, 1895. 



66. Dendroica striata. Black-poll Warbler. 



Sometimes common in May, and noted occasionally in Septem- 

 ber and October. The earliest spring date is May 14, 19 16; the 

 latest, May 31, 191 7. Our autumn records are, rather remarkably, 

 only September 21, 1917; October 4, 1914; and October 8, 1916. 



67. Dendroica castanea. Bay-breasted Warbler, 



