Hirunda horreorum. 
j Maine (Lake Umbagog). 
1873. 
Sept. 3„ 
All the SYmllows have apparently gone, 
very suddenly several days ago. 
They loft 
1874. II 
July 30. 
I have seen none for tv/o days and think they have 
left here. 
Aug. 8. 
“ 25. 
“ 29. 
Sept. 3. 
Still hero. 
Those, as well as all the other Svr?,llov/-s, collected 
into immense flocks to-day and disappeared. 
A few still remain, but I think all the other Svral- 
lows have left. 
A few still about. 
