378 
PRAIRIE WARBLER. 
brownish black, lighter on the edges, the three exterior feathers 
broadly spotted with white. 
The female is destitute of the black mark under the eye; has 
a few slight touches of blackish along the sides of the neck; 
and some faint shades of brownish red on the back. 
The nest of this species is of very neat and delicate work- 
manship, being pensile, and generally hung on the fork of a 
low bush or thicket; it is formed outwardly of green moss, in- 
termixed with rotten bits of wood and caterpillars’ silk; the 
inside is lined with extremely fine fibres of grape-vine bark; 
and the whole would scarcely weigh a quarter of an ounce. 
The eggs are white, with a few brown spots at the great end. 
These birds are migratory, departing for the south in October. 
