APPLE SAWFLY. 



35 



States of America, from which we gain constant help in 

 methods of keeping injurious insects in check, the most recent 

 information regarding a heetle very similar in its hahits only 

 gives us the following from the well-experienced writer : — 



" Frequent rotation and fall [autumn] ploughing are to be 

 recommended ; and where grass-lands are infested, heavy 

 top-dressings of kainite and nitrate of soda have proved 

 beneficial. Wherever ploughing is done in infested fields, 

 chickens should be encouraged to follow in the furrow, and 

 pick up the grubs." — 'Economic Entomology,' by John B. 

 Smith, Sc.D., Professor of Entomology, Eutger's College 

 (J. B. Lippincott Company, Philadelphia, 1896). 



Apple Sawfly. 

 Hoplocampa testudinea, Cameron ; Tenthredo testudinea, Klug. 



HoPLOCAMPA TESTUDiXEA. — Female sawfly and caterpillar, magnified, with 

 lines showing natural size, after Prof. J. 0. Westwood. Injured Apple and 

 caterpillar, natui'al size. 



Apple Sawfly attack has long been known to be present in 

 this country. So far back as 18-47 this infestation was 

 described, from his own observations, by Prof. J. 0. West- 

 wood ; but it was not until the summer of the year 1891 that 

 communications were sent me regarding it as an injurious 

 attack, and I had an opportunity of observing the method of 

 attack myself. 



The sawfly (figured above, magnified) is about a quarter of 

 an inch in length ; the body is yellow or reddish yellow on the 

 under side ; a large patch on the top of the head, also the top 

 of the body between the wings, black, shining, and minutely 

 punctured ; the back of the abdomen also black. The 

 shoulders, legs, front and sides of head, and the antennae (or 



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