Class II. SWALLOWS. 553 



attack him immediately : the swifts soon de- 

 sist; but the swallows pursue and persecute 

 those rapacious birds, till they have entirely 

 driven them away. 



Swifts delight in sultry weather, and seem 

 thence to receive fresh spirits. They fly in 

 those times in small parties with particular vio- 

 lence ; and as they pass near steeples, towers, 

 or any edifices where their mates perform the 

 office of incubation, emit a loud scream, a sort 

 of serenade, as Mr. White supposes, to their 

 respective females. 



To the curious monographies on the swallow 

 tribe, of that worthy correspondent, I must 

 acknowledge myself indebted for numbers of 

 the remarks above-mentioned. 



OF THE 



DISAPPEARANCE OF SWALLOWS. 



There are three opinions among naturalists 

 concerning the manner the swallow tribe dis- 

 pose of themselves after their disappearance 

 from the countries in which they make their 

 summer residence. Herodotus mentions one 

 species that resides in Egypt the whole year: 



