OF EASTERN PENNSYLVANIA. 33 



has been borrowed from ll Birds of North America" 

 by Baird, Brewer and Ridgway. 



In many nests which we have examined, there 

 has been a heterogeneous commingling of various 

 vegetable substances constituting an exterior. 

 Leaves of Oucrcus, Fagus, and Populus, steins of 

 Chenopodium album, coarse strips of the outer 

 bark of the vine, inner bark of the poplar, husks 

 of corn, composed the outer fabric. The strips of 

 bark served to bind the other materials firmly 



* 



together. A thick layer of rootlets constitute the 

 inner structure. 



Another nest which we have examined, in 

 addition to the above materials, exhibited frag- 

 ments of vines of Convolvulus ari'eiisis, a species 

 of Bindweed, and the Wild-bean, ^-]/>tos iuberosa\ 

 liber of trees of dingy whiteness, three-fourths of 

 an inch in width ; and discolored pine shavings. 

 Few leaves were noticeable in the exterior. In- 

 teriorly, there was a close lining of the roots and 

 stems of herbaceous plants. In contour, the nest 

 was very irregular, with the base obliquely in- 

 clined to the mouth. The structure bore a near 

 resemblance to the nest of the Maryland Yellow 

 Throat, save that it was somewhat shorter. From 

 its marked deviation from the typical nest which 

 is hemispherical, beautifully symmetrical and 

 moderately compact, \ve presume it. to be the 

 workmanship of vourii>f birds or those of indolent 



1 * O 



habits. 



The ground-structure of a nest in our possession, 



c 



