63 



The attack is usually worst in June, and is apparently 

 not confined to any particular kinds of Roses in bad 

 years. Roses trained against a wall or fence, however 

 seem to be more attacked than bushes and standards in 

 the open. Ramblers seem very succeptible to this pest. 



LIFE HISTORY AND HABITS. 



The adult " Frog-hoppers" may be found from July 

 to October. Their curious form is shown in the figure 

 (Plate VIII., Fig. 6). The colour is extremely variable, as 

 many as thirteen varieties being known. The commonest 

 form is figured here, but some are uni-colourous yellow, 

 and some black. The species can always be told by the 

 sides of the front wings (elytra) being distinctly rounded. 

 The length varies from one-fifth to one-fourth of an 

 inch. Like the preceding insects they have a sucking 

 mouth, by means of which they draw out the sap. They 

 can jump quite a considerable distance, and may be found 

 in the summer on to October settled on various plants. 



The " Frog-hoppers " have a larval and pupal stage, 

 both of which are unable to hop and which produce the 

 frothy-looking substance beneath which they live. These 

 two stages are pale yellowish and are collectively called 

 nymphs. The winged adults hibernate and lay their 

 eggs on the plants in the following spring. 



TREATMENT. 



Nothing but spraying will do any good, unless we 

 have the patience to go over all our bushes and hand 

 pick them. But before we spray we must get rid of the 

 froth over the nymphs. To do this a good syringing 

 with plain water, applied with force is the best plan. 

 Then follow with a syringing of dilute paraffin emulsion 



