MOURNING WARBLER. 251 
and concealed by projecting weeds and grass. Sometimes a 
mere tussuck of grass or accidental pile of brush is chosen. 
It is made of dry sedge-grass (Carex), and a few leaves loosely 
wound together and supported by the weeds or twigs where it 
rests; the lining consists entirely of fine bent-grass (Agrostis). 
The young leave the nest, here, about the middle of June, 
and a second brood is sometimes raised in the course of 
the season. The parents and young now rove about in 
restless prying troops, and take to the most secluded bushy 
marshes, where they pass their time in comparative security 
till the arrival of that period of scarcity which warns them to 
depart. As early as the close of July, the lively song of the 
male ceases to be heard, and the whole party now forage in 
silence. 
This species is common throughout the settled portions of Can- 
ada, from the Atlantic to Lake Huron. 
Note. — The Western form has lately been separated from true 
trichas and given varietal rank with the name G. ¢riéchas occidentalis. 
Its habitat is from the Mississippi valley to the Pacific. It is some- 
what larger and more brightly colored than is the eastern race. 
Another geographical race, the FLORIDA YELLOW-THROAT (G. 
trichas ignota), —lately described by Mr. Frank M. Chapman from 
specimens taken in Florida and Georgia, — differs from typical 
trichas in having the yellow of under parts of deeper shade and 
greater extent; the facial mask is wider also. 
MOURNING WARBLER. 
GEOTHLYPIS PHILADELPHIA. 
Cuar. Above, olive ; head, neck, and breast ashy ; breast mottled with 
black ; remainder of under parts yellow. Length 51/ to 5% inches. 
Nest. In open woodland or pasture, on the ground or in low tree or 
bush; of vegetable fibre, lined with hair. 
Eggs. 3-5; white or creamy, with brown and lilac spots wreathed 
around the larger end; 0.70 X 0.54. 
Wilson, the discoverer of this curious species, never met with 
more than a single individual, which in its habits of frequent- 
