314 Trans. Acad. Sci. of St. Louis. 
This species is not so closely associated with thick woods as 
most of the other vireos and may be found on the prairie re- 
gions in thickets, hedges, bushes and small clumps of trees or 
shrubbery. It nests in the outskirts of the city and may be 
found in the neighborhood of Swope Park as well as other 
easily accessible places further west and south. It nests early 
in June. 
Family MniorimntipaAE. Wood Warblers. 
MNIoriutTA VARIA (Linn.). Black and White Warbler. 
Common migrant and rather rare summer resident. 
The Black and White Warbler arrives from the 15th to 20th 
of April (April 11, 1915, earliest) and is very common in the 
wooded sections of the county until the middle of May. From 
then on until the first week in September only the breeding 
birds are present. During the first two weeks of September 
the migrants are again numerous. 
This distinctively marked warbler breeds in the less fre- 
quented sections of Swope Park where it has been observed e¢ar- 
rying nesting material and feeding full grown young. Unlike 
most of the warblers it often feeds near the ground on the 
trunks of trees and among low bushes and is easy of approach. 
During the spring migration, when the birds are mating, 
they are seen in numbers in wooded territory over the entire 
county, particularly in Swope Park. 
PROTHONOTARIA CITREA (Boddaert). Prothonotary Warbler. 
Common summer resident. 
The Prothonotary Warbler arrives irregularly from the mid- 
dle to last of April (April 7, earliest) and leaves during the 
first half of September. 
It nests in holes and cavities and prefers to be near water. 
It breeds along the Blue in the Swope Park district and is com- 
mon in the Missouri bottom timber near swampy and damp ; 
places. Deserted woodpecker holes in standing dead trees or 
stumps are favorite nesting sites. 
Great numbers migrate up and down the Missouri Valley. 
HELMITHEROS VERMIVORUS (Gmelin). Worm-eating Warbler. 
Not uncommon summer resident. 
The Worm-eating Warbler arrives during the first few days 
