344 The Natural History of Selborne 



emigration, and shifting their quarters ; and might have come, as 

 far as we know, from the great hop-plantations of Kent or Sussex, 

 the wind being all that day in the easterly quarter. 1 They were 

 observed at the same time in great clouds about Farnham, and all 

 along the vale from Farnham to Alton.* 



* For various methods by which several insects shift their quarters, see 

 Derham's " Physico-Theology." 



1 Winged aphides are specially produced under certain circumstances as 

 foundresses of colonies, and blow away at times in great numbers. ED. 



