11 



encouraging parasites, yet, in Britain at all events, the chances 

 are not very many. We can be thankful for the help already 

 given by them, which is inestimable, but we cannot yet manage 

 that they shall do all the work, and artificial control measures 

 are therefore needed. 



Nevertheless recognition of Beneficial Insects should be wide- 

 spread -and their destruction avoided wherever possible, for all 

 alike ultimately share the benefits they confer. Without 

 Beneficial Insects cultivation would be impossible. 



TECHNICAL DESCRIPTION OF PLATES. 



PLATE I. 



Pig. 



1 Adalia bipunctata, Linn. (Coleoptera, Coccinellidae). 



2 Ova of do. do. 



3 Larva of do. do. 



4 Pupa of do. do. 



5 Compsilura (Phorocera) concinnata, Mg. (Diptera, Tachi- 



nidaa). 



6 Ophion luteus, Linn. (Hymenoptera, Ichneumonidae). 



7 Apanteles glomeratus, Linn. (Hymenoptera, Braconidae). 

 7a Cocoons of do. do. 



8 Blastoihrix sericea, Dalm. (Hymenoptera, Chalcididae). 



9 Pimpla instigator, Fab. (Hymenoptera, Ichneumonidae) 



PLATE II. 

 Kg. 



1 Syrphus balteatus, De G. (Diptera, Syrphidae). 



2 Larva of do. do. 



3 Cocoon of do. do. 



4 Chrysopa vulgaris, Schn. (Neuroptera, Chrysopidae). 



5 Eggs of do. do. 

 -6 Larva of do. do. 

 7 Pupa of do. do. 



