158 SAWFLIES, ICHNEUMON-FLIES, WASPS, ETC. 



to US is done, it rests for the winter in a silken case, 

 very near ground-level, in the sawn-through stalk. 

 To prevent attack recurring, it is a perfect treatment 

 to gather together the infested stubble and burn it. 



This is an exception to the usual form of life and 

 place of change of Sawfly larvae, therefore must be 

 treated differently ; but there is the same principle to 

 be followed as with caterpillars and chrysalids of other 

 kinds of Sawfiies, and also of Butterflies and Moths, — • 

 that is, firstly, to find out where they pass the 

 winter, and then to turn them out from their shelters. 



Fig. 12'2. — The " Common " iSirex and grub. 



The amount of injury caused by Sawfly caterpillars, 

 ■and especially from time to time by those of the Tur- 

 nip Sawfly, is so serious that a great deal (of more or 

 less use) has been written on the subject; but in the 

 short notes of the five kinds of attack mentioned above, 

 it will be seen that whether as infesters of the forest 

 tree or the garden fruit bush ; as feeders within the 

 firm fruit of the Apple, or on the succulent leaves of 

 the Turnip, or carrying on their injurious works 

 hidden within the growing Wheat-straw; or, again. 



