OF EASTERN PENNSYLVANIA. I I 7 



dense as hardly to be noticeable." Those which 

 he found around Eastport, and at Grand Menan, 

 were large and bulky, nearly five inches in diame- 

 ter, with a depth of three. They were built prin- 

 cipally of the tender ends of the branches of firs, 

 pines, and spruce, variously interwoven, and bound 

 together by slender, herbaceous roots, finer carices, 

 and elongated branches of the Cladonia lichens; 

 strongly, compactly, and homogeneously made, 

 and elaborately lined with fine straw and panicled 

 grasses. 



Of the precise time of nidification and incuba- 

 tion we are io-norant. Nests with eofo\s have been 



c> oo 



procured as early as June 9, and in a solitary 

 instance, a nest was taken containing well- 

 developed embryos on the first of the same month. 

 From these data, we infer that nest-building takes 

 place as early as the middle of May; reasonable 

 time being allowed for the completion of the nest 

 and the laying of the eggs. 



The eggs of this species are oblong-oval, beau- 

 tifully white in ground-color, but slightly tinged 

 with pink when fresh, and spotted and blotched 

 with a profusion of markings of subdued lavender 

 and profounder markings of dark-purple, inter- 

 mingled with lighter spots of reddish- brown. They 

 measure .72 by .50 of an inch. The usual com- 

 plement is five, though six are occasionally found, 



Dendrosca castanea, Baird. 

 The Bay-breasted Warbler, one of our most 



