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



Double nests. Nests with a double bottom built over an in- 

 truding Cowbird's egg, found June 30, 1895, and May 27, 1900 

 (J. C. A. M.) ; June, 1893 or 1894 (Porter) ; June 2, 1898 

 (L. B. B.). 



Dendroica caerulescens casrulescens (Gmelin). Black- 

 throated Blue Warbler. 



A common spring and autumn migrant in May and September ; 

 breeds tolerably commonly in Litchfield County at least as far 

 south as Warren. 



Spring migration. Earliest record. New Haven, May 5, 1894, 

 April 30, 1908 (C. H. Pangburn) ; Portland, May 4, 1896; Hart- 

 ford, April 29, 1891. l Latest record. New Haven, May 28, 1907, 

 May 29, 1907 (A. A. S.) ; Portland, May 26, 1894. 



Fall migration. Earliest record. New Haven, Sept. u, 1902, 

 1903; Portland, Sept. 23, 1893. Latest record. New Haven, 

 Oct. n, 1906, Oct. 17, 1888 (H. W. F.) ; Portland, Oct. 9, 1883. 



Nest. Just off the ground in thicket, usually of Kalmia; in 

 woods. 



Eggs- 3-5 ; earl 7 in J une - 



Breeding records. June 8, 13, 1874, two nests, and June 7, 

 1881, four eggs, Eastford (C. M. Jones) ; 2 June 8, 1900, Kent, 

 nest with four eggs, female secured (L. B. B.) ; June 7, 1905, 

 nest with five eggs, June 10, 1905, three eggs, Litchfield 

 (E. S. W.)- 



The authors found this species tolerably common in Salisbury 

 between June 16 and 20, 1904, frequenting wooded hillsides, over- 

 grown with Kalmia. 



Dendroica coronata (Linnaeus). Myrtle Warbler. 



A common spring and fall migrant in April, October, and 

 November; a tolerably regular winter resident, especially near 

 the coast. 



Spring migration. Earliest record. New Haven, March 15, 

 1894; Portland, March n, 1882. Latest record. New Haven, 

 May 18, 1884, May 21, 1905 (A. A. S.) ; Portland, May 22, 1905; 

 Litchfield, May 24, 1905 (E. S. W.). 



1 Bird-Lore, viii, 6, p. 203. 



a Merriam, Birds of Conn., p. 15. O. and O., ri, 7, pp. 49-5- 



