190 HYMENOPTERA (SAWFLIES). 



that they do not all undergo these stages at the same time, 

 some remaining in the ground, much longer than others. 

 Numbers of larvaj are often found on one leaf of different 

 sizes, the eggs having been deposited at various times. 



Prevention and Remedies. — Similar preventives apply here 



93. — Slugworms (Larvf of Eriocampa limadna) upon a leaf. 



as in the Gooseberry Sawfly. Lime vrill soon kiU the larvse if 

 it is applied tvi'ioe in succession, as they have the power, like 

 slugs, of passing out a coat of slime and leaving it and the 

 lime behind. They are best destroyed by the arsenical washes 

 mentioned in Appendix II. Arsenate of lead was found very 

 successful in 1897 at the S. E. Agricultural College Fruit- 

 Gardens. 



The Corn Sairflij I^Cephuf piKimn w). 



The Corn Sawfly belongs to a different section [Cepliinn) to 

 either of those already mentioned. The body of this corn pest 

 is flattened from side to side, keel-shaped. It has long been 

 known as a corn pest, but it is never very serious in this 

 country, as it is sometimes on the Continent. All kinds of 

 straw crops are attacked, but V. /ii/i/dkvus seems to show a 

 decided preference for wheat. The adults appear in June and 



