1889. | STONE, Graphic Representation of Bird Migration. 139 
it was not secured, and on the 29th of the same month he secured one 
making his second specimen for this fall. I have never met with it in 
any of my collecting trips, nor has my son, nor have I ever found a light, 
house specimen, although I have received and examined carefully hun- 
dreds of Warblers from the lights during the past few years. 
16. Geothlypis formosa. Kentucky WARBLER.— Mr. Giraud says: 
‘«The specimen in my possession was shot in the woods at Raynor South, 
and a few others have been procured in the same section. On no other 
part of the Island have I observed it, and I consider it with usa very 
scarce species.”* In the Lawrence collection in the American Museum, 
there is one specimen, a male, labelled, ‘‘Raynor South, May 18, 1834.” 
Since the lists of Giraud and Lawrence were published no other record 
has been made; therefore, it gives me pleasure to record a specimen, a 
male, which was sent to me by Mr. Skipworth from Fire Island Light, 
where it struck during the night of August rg, 1888; wind west, squally, 
with rain and fog. 
17. Sylvania mitrata. HoopED WARBLER.— ‘‘With us, the Hooded 
Flycatching Warbler is not abundant” is the note of Giraud.t In the 
Lawrence collection in the American Museum, there is but one speci- 
men, a male, from Long Island. The only specimen*that I have in my 
collection, and also my only record from Long Island, is of one that 
struck Fire Island Light, during the night of September 1, 1888. Wind, 
N. W., light; cloudy. 
GRAPHIC REPRESENTATION OF BIRD MIGRA- 
| TION. 
BY WITMER STONE. 
Every ONE interested in bird migration no doubt notices the 
steady increase in species and individuals as the spring advances, 
the number reaching its maximum some time in May, and then 
falling off and becoming uniform during the early summer when 
the birds have completed their migrations and are busy building 
their nests and rearing their young. Again in the latter part of 
summer the number increases, reaches its maximum in Septem- 
ber, and then steadily decreases until winter, when the mini- 
tuum is reached. 
*Birds of Long Island, p. 50. 
tIbid., p. 48. 
