OF SELBORNE. 311 



flies) that were just emerged out of their 

 aurelia state. I then no longer wondered 

 that they should be so willing to stoop 

 for a prey that afforded them such plentiful 

 and succulent nourishment. 



They bring out their young about the 

 middle or latter end of July : but as these 

 never become perchers, nor, that ever I 

 could discern, are fed on the wing by their 

 dams, the coming forth of the young is not 

 so notorious as in the other species. 



On the thirtieth of last June I untiled 

 the eaves of an house where many pairs 

 build, and found in each nest only two 

 squab, naked pulli : on the eighth of J aly I 

 repeated the same inquiry, and found they 

 had made very little progress, towards a 

 fledged state, but were still naked and help- 

 less. From whence we may conclude that 

 birds whose way of life keeps them perpe- 

 tually on the wing would not be able to 

 quit their nest till the end of the month. 

 Swallows and martins, that have numerous 

 families, are continually feeding them every 

 two or three minutes ; while swifts, that 



