Fig. 13. Plant Lice {Aplds) on the unopened blossoms and young leaves. 



Fig. 14. Syrphus Flies. Very im- 

 portant enemies of Plant Lice on all 

 kinds of plants, (a) Eggs ; (b) Larva 

 alive and eating an Aphis ; (c) Adult. 

 Twice natural size. The Larva is not 

 the same species as egg and adult here 

 shown but is larger. It is suiTounded 

 by the remains of the Aphids it has de- 

 voured. 



