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. 



