18 



CORN AND GRASS. 



If any practicable measures of checking this attack are known by 

 Celery growers, it would be a great advantage to all if they would 

 make them known, for though palliatives may possibly be brought to 

 bear, it is much more likely than not that, where such a large area as 

 seventy-eight acres of crop is grown, there is no means of getting the 

 infestation under, — of a maggot feeding xvithin the plants, and a fly, 

 only about the size of a Cheese Fly, without, — except a change of crop. 

 Thus, as with Mustard Beetle, and other attacks of insects to crops 

 grown largely and long in a district, by removing the chief food of the 

 pest it may not be totally cleared, but its overwhelming presence is 

 locally checked. 



CORN AND GRASS. 



Cockchafer. May Bug. Melolontha vulgaris, Fab. 



Melolontha vulgaris. 

 Common Cockchafer, maggot, and pupa. 



The following notes regarding the grub of the common Cockchafer 

 Beetle, are inserted to show how near the surface of the laud they may 

 be found in winter. Also as giving practical example that, though 

 grubs or other insects can bear severe cold, so long as they are in the 

 shelters which they have made or chosen for themselves, yet if turned 

 out of these on to the surface, where they are exposed to influence of 

 unfavourable weather, and from this, and possible winter torpidity, are 

 not able to shift for themselves, multitudes may thus be destroyed. 



