36 



one-sixth of an inch. The eggs are laid on the leaf. The 

 larvae are all green, with paler areas at the segments and 

 conspicuous hairs on the back ; the skin in the later 

 stages becomes somewhat wrinkled, and the head brown 

 and white and shiny. They fall to the ground when full 

 grown and enter the soil in August and at once form a 

 cocoon, in which they remain as larvae until February or 

 March, when they pupate, and a fresh batch of 

 sawflies comes up and attack the Roses in early summer. 



TREATMENT. 



Spraying with arsenate of lead would probably be 

 beneficial, but by far the best plan is to hand-pick the 

 folded leaves when first seen and destroy them. 



There is little doubt that this insect is introduced 

 into Rose beds with the earth on the roots of briars, 

 in the cocoon form. 



It is well therefore to see that all earth is cleaned 

 from the roots before being planted. This may be done 

 by well washing them in plain water. 



The Rose Slugworm (Eriocampa roses}. 



Another sawfly causes endless annoyance in gardens, 

 namely, the Rose Slugworm, an insect which in its 

 larval stage works very much like the Slugworm or Sneg 

 of the Pear and Cherry. 



The larvae of this sawfly devour the upper epidermis 

 and tissues of the Rose foliage, leaving intact the lower 

 epidermis. The leaves at first become blotched, then 

 almost white, then brown and shrivelled up, the lower 

 skin always remaining intact. 



