622 The American Naturalist. [July, 
experience with the circumstances in which it was placed.—F. ©. 
KENYON. 
“ A List of the Birds of the Vicinity of West Chester, 
Chester Co., Pennsylvania.—The following list of birds is based 
upon the observations of a collecting period extending from 1885 to 
1891, and again resumed in 1895. By far the greater part of my col- 
lecting has been limited to the country within a five miles’ radius of 
the town of West Chester, that is, principally to the higher ground of 
the townships of West and East Goshen and West Whiteland to the 
north and east, and to the west and south the valley of the Brandywine 
Creek in East Bradford townships. All the species here annotated 
have been shot and identified by myself, with the exception of a few 
taken by collecting friends; but none are included in this list of which 
I have not seen specimens in the flesh. For a considerable number of 
the migratory species I have made notes on the time of their first oc- 
currence in the spring, as well as of the time of arrival of the “ bulk” 
of individuals for the given year, and for some species I have noted the 
time of arrival or departure in the fall. Many of these dates will be 
found to correspond very closely with those given by Witmer Stone in 
his “ Birds of Eastern Pennsylvania and New Jersey,” 1894. Further, 
I have endeavored to note the comparative abundance of the species as 
accurately as possible, and in this point my data would offer approxi- 
mate correctness, since the area over which I have collected is com- 
paratively limited in extent. 
The rarest of the 145 species mentioned below are the following: 
Aegialitis semipalmata Bonap., Ectopistes migratorius (Linn.), Zono- 
trichia leucophrys (Forst.), Lanius ludovicianus Linn. and Dendroica 
caerulea (Wils.). 
1, Polilymbus podiceps (Linn.), Pied-billed Grebe. A not infrequent 
migrant in the fall, along the Brandywine. ; 
2. Sterna sp., Tern. I saw an individual of a small species of this 
genus (perhaps S. hirundo Linn.) shot on the Brandywine near Lenape, 
in the late summer of 1887. Owing to the rapid decomposition of the 
specimen, I was unable to identify the species. 
3. Anas discors Linn., Blue-winged Teal. On Aug. 8, 1889, I shot 
an adult, and at the same time saw another individual, on the Brandy- 
wine near Lenape. 
4. Aix sponsa (Linn.), Wood Duck. An infrequent summer resi- 
dent on the Brandywine 
5. Erismatura rubida (Wils.), Ruddy Duck. I shot an ad ult female, 
March 15, 1890, in a marsh by the Brandywine at Lenape. 
