REPORT OF THE ENTOMOLOGIST. 



195 



REMEDIES. 



Like all other plant lice, the present species is preyed upon by a 

 large number of predaceous and parasitic insects, such as lady-birds, 

 lace-wing flies, syrphus flies, and several very minute hymenopterous 

 parasites. Some of these are shown in Figs. 2 to 8. 



Fig. 2. — The Root-louse Syrphus-fly (Pipiza radi- 

 cum) : a, larva or maggot ; b, puparia ; c, fly. [Al- 

 ter Riley.] 



Fig. 3. — Hippodamia conver- 

 gens. [After Riley.] 



Fig. 4. — Larva of Lady- 

 bird. [After Riley.] 



Fig. 5. — Hippodamia 13- 

 punctata. [After Riley.] 



Fig. 6. — Coccinnella 9- 

 notata. [After Riley.] 



Fig. 7 .—Hippodamia 

 maculata. [After Riley.] 



-> 



Fig. 8. — Lace-wings: a, eggs on leaf; 6, larva ; c, d, mature insect. [After Riley.] 



When artificial means must be employed, and this should be done 

 just as soon as the lice first appear, the " kerosene emulsion" remedy 

 should be applied to the above ground form, while for the root form 

 Saunders writes : "The most successful means yet devised for destroy- 



