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July 1, 1863. 



The President in the chair, 



Mr, A. E, Verrill made the following observations on the 

 supposed eastward migration of the Cliff Swallow {Hirundo 

 lunifrons Say). 



The interesting history of this swallow, and the peculiar circum- 

 stances connected with its first discovery in the west and subsequent 

 appearance in the Atlantic States, are so well known that it is perhaps 

 unnecessary to present at this time more than a brief summary of the 

 recorded observations of its earliest appearance on the eastern side 

 of the continent. 



In 1815, they were observed at Henderson, Ky., on the Ohio River, 

 by Mr. Audubon ; in 1817, a colony, then two years old, was seen by 

 him opposite Cincinnati. In 1817, they are said by De Witt Clinton 

 to have appeared at Whitehall, N. Y., — the first year in a single pair, 

 which in 1822 had increased to seventy. In 1820, it was discovered 

 amor^g the Rocky Mountains by Major Long's Expedition, and also by- 

 Sir John Franklin's party between Cumberland House and Fort En- 

 terprise. 



Sir John Franklin states that in 1825 they made their first appear- 

 ance at Fort Chippewyan, building their nests under the eaves of a 

 buUding. Dr. J. W. Steel mentions them as breeding at Greenfield, 



