I56 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Dendroica pensylvanica (Linnaeus). Chestnut-sided 



Warbler. 



A common summer resident from May until August; breed- 

 ing more abundantly in the northern part of the state. 



Earliest record. New Haven, May 2, 1899; April 30, 1908 

 (C. H. P.) ; Portland, April 28, 1908. 



Latest record. New Haven, Sept. 14, 1895, Sept. 24, 1887 

 (H. W. F.) ; Portland, Sept. 5, 1892. 



Nest. In a small bush, usually in a brush lot, occasionally 

 in the woods; 1-4 feet from the ground. 



Eggs. 2-4 ; early in June. 



Nesting dates. Earliest record. May 23, 1896, four eggs 

 (H. W. B.). Latest record. June 24, 1895, three eggs and one 

 Cowbird's egg (Hamlin) ; July 22, 1904, young just out of the 



nest (L. B. B.). 



This species has been found occupying a deserted Red-eyed 

 Vireo's nest, the only part it had constructed being the lining of 

 hair (Hamlin, June 22, 1895). A nest containing four eggs, and 

 one of the Cowbird half buried in the bottom, was found, May 

 31, 1899 (J. C. A. M.). 



Heard singing as late as July 10 (1888), by Eames. 



A male taken in Litchfield, Aug. 17, 1892, by E. S. W. has 

 a very slender bill, the maxilla being .5 inch long, and the 

 mandible slightly shorter with a scoop-shaped tip. 



Dendroica castanea (Wilson). Bay-breasted Warbler. 



Usually a rare spring migrant and still rarer in the fall ; occa- 

 sionally common for a few days in May. 



Spring migration. Earliest record. New Haven, May 10, 

 1900; Portland, May 12, 1905. Latest record. New Haven, June 

 6, 1882 ; Portland, May 26, 1882. 



Fall records. Sept. 30, Oct. 17, 1876 (Osborne) j 1 Sept. 25, 

 1890, Sept. 18, 1893, Portland (J. H. S.) ; Sept. 16, Oct. 5, 1887, 

 East Hartford (W. E. T.) ; Sept. 26, 1893, Stamford (Porter) ; 

 Sept. 6, 13, 1905, Litchfield (E. S. W.) ; Sept. 27, 1911, New 



Haven (L. B. B.). 



Spring occurrence. New Haven, 1882 (common), 1884, 1886 

 (Webb), 1892 (Flint), 1900 (common), 1902, 1905, 1906, 1907 



1 Merriam, Birds of Conn., p. 16. 



