312 Trans. Acad. Sci. of St. Lows. 
later. Four to seven eggs are laid and two broods are often 
raised. 
Family VIREONIDAE. Vireos. 
VIREOSYLVA OLIVACEA (Linn.). Red-eyed Vireo. 
Common summer resident. 
The Red-eyed Vireo arrives regularly during the last four 
days of April and leaves during the last week of September. It 
is our commonest vireo and comes freely into the wooded sec- 
tions of the city to breed. One pair even yet comes to nest in 
a thicket on the ledge in Penn Valley Park, a few blocks from 
the Union Station. Red-eyed Vireos are numerous in and 
about Swope Park, in some of the cemeteries, in the wooded 
sections bordering the Country Club and other districts within 
the city and along the bluffs. The nesting season begins about 
the second week in May. 
VIREOSYLVA PHILADELPHICA Cassin. Philadelphia Vireo. 
Rather rare migrant. 
There are but six known records of the local occurrence of 
this vireo, all during the month of May. Two specimens have 
been taken by Tindall on May 10, 1893, and May 8, 1898, re- 
spectively. 
VIREOSYLVA GILVA GILVA (Vieillot). Warbling Vireo. 
Common migrant and not uncommon summer resident. 
The Warbling Vireo rarely arrives in numbers before the 
first week in May though singing males are occasionally heard 
as early as the middle of April. It leaves for the south during 
the first two weeks of September. 
During migration Warbling Vireos may be found in wooded 
places in every part of the county but in summer they seem to 
prefer the bluff regions and neighboring territory. They are 
heard singing during the nesting season about Independence, 
Courtney, Atherton and Sibley and in the Missouri and lower 
Blue Valleys. They have been found nesting in Fairmount 
Park. 
LANIVIREO FLAVIFRONS (Vieillot). Yellow-throated Vireo. 
Not uncommon summer resident. 
The Yellow-throated Vireo arrives about the middle of April 
and leaves in late September. This vireo loves damp woods and 
