52 



The egg is laid on the under surface of the Rose 

 leaf close to a rib, and the larva on hatching in a few 

 days bores into the leaf and gradually forms the tunnel, 

 leaving its " frass " behind, thus forming the dark 

 central line. When full grown the larva opens the upper 

 skin of the leaf and crawls out and proceeds to the foot- 

 stalk of the leaf and there spins a small orange-coloured 

 cocoon in which it pupates. From this the moth hatches 

 in two to three weeks, as a second brood in August, and 

 the same takes place again. 



The larvae of this second brood, however, pupate in 

 the cocoons attached to the stem, stalk or under a thorn, 

 and also in the ground (Plate VIII., Fig. 4). There 

 they remain as pupae until next May. We may find the 

 larvae of the second brood in tunnels as late as November. 

 This leaf-miner is generally distributed over the south, 

 west, east and middle of England. 



TREATMENT. 



Where it is plentiful it is well to go over the bushes 

 in June and pick off all the mined leaves and burn them. 



So far, no good results have been obtained by 

 spraying. 



APHIDES, SCALE INSECTS, FROG-HOPPERS, 



AND LEAF- HOPPERS (Hemiptera) INJURIOUS 



TO ROSES. 



We find three groups of the piercing -mouthed 

 insects to be harmful to Roses in this country, namely, 

 (i) the Plant Lice, Green Fly or Aphides, (ii) the 

 Scale Insects, and (iii.) the Leaf-hopper and Cuckoo 

 Spit insects. The two first-named belong to the 

 hemiptera-homoptera (with uniform wings), the last 

 to the hemiptera heteroptera (anterior wings differ 



