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 w^eather, 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. JVhite 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: 



