LACE WINGS. 85 



sufficiently close together the first-hatched grub 

 will cling to its egg shell and watch for the emer- 

 gence of its brothers and sisters, catching and eating 

 them as they appear. In the ordinary way the grub 

 crawls down the hair-like stalk of the egg and finds 

 itself quite close to a flock of the green fly or 

 aphis." 



