
748 THE AMERICAN NATURALIST. [Vor. XXXVI. 
When the Munson line steamship Curitiba, bound for New 
York, reached lat. 30° N- long. 70° 30’ W., on Oct. 11, 1900, 
*five ospreys came on board; two of them were shot, one 
was captured, one alighted on the after-deck boat and then fell 
into the sea, and the remaining one fell down the funnel. At 
dusk on the following day two more hawks were captured.” 
These facts were given to the author of this paper by Captain 
Hoppe of the Curitiba. 
When the birds were first seen the Curitiba was 500 miles 
from Florida and 400 miles from Cape Hatteras. According 
to the U.S. Weather Bureau observations taken at 8 A.M. on 
October ro, at Cape Hatteras, the wind was north, 28 miles per 
hour, and on October 11, north, 14 miles per hour. At Boston, 
on October 11, the wind was northwest, 24 miles per hour. 
These strong offshore winds were unquestionably the cause 
of the appearance of the hawks far out at sea. The Curitiba 
also encountered a large number of bats which had evidently 
blown out to sea by the northwest wind. 
MIGRATING PERIODS OF VARIOUS SPECIES OF HAWKS IN 
AUTUMN. 
In the table on the opposite page the periods when a num- 
ber of species of hawks migrate southward in the latitude of 
Connecticut are given. 
WIDESPREAD EFFECT oF STORMS. 
It is well known that high north and northwest winds are 
directly due to centers of low barometric pressure lying to the 
eastward. 
In the northern hemisphere the motions of the lower strata 
of the atmosphere about centers of low barometric pressure 
are counter-clockwise. These low areas are known as storm 
centers, and in the eastern part of the United States they 
usually travel in a northeasterly direction. A storm © 
moderate intensity is shown by Map III, which is an approxi- 
mate representation of the U.S. Weather Bureau map of 

