34i 



THE PEAR AND CHERRY SAWFLY {Eriocampa 

 limacina — C ameron ) . 



Shigworms upon a leaf. 



The extremely repulsive larva of this sawfly, termed by 

 Cameron Eriocampa limacina^ and by other entomologists 

 Selandria atra, is frequently most destructive to pear and 

 cherry trees. It also infests apple, plum, damson and peach 

 trees, and is occasionally seen upon oak, birch, and other 

 forest trees, as well as on some species of thorns. In the 

 past dry season, cases have occurred where nearly all the 

 leaves fell from pear trees in consequence of the continuous 

 attacks of larvae of this sawfly, which are sometimes called slug*- 

 worms. 



Heat and drought are, without doubt, favourable to 

 the multiplication and destructive activity of this insect, while 

 cool, showery weather interferes not only with the hatching 

 of the eggs, which are laid upon the upper surface of the 



