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 caerulescens (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. Pangbum) ; Portland, May 4, 1896; Hart- 

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

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



Fall migration. Earliest record. New Haven, Sept. 11, 1902, 

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

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



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

 woods. 



Eggs. 3-5 ; early in June. 



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

 1881, four eggs, Eastford (C. M. Jones) ;^ 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 11. 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.)- 



^Bird-Lore, riii, 6, p. aoj. 



*Merriam, Birds of Conn., p. 1$. O. mnd O., rl, 7, p^ 49-S«. 



