72 
TURNIP. 
Motlis should not hatch out to renew attack, would answer as well in 
this case as it is known to do practically in getting rid of Gooseberry 
caterpillars. If the soil is only stirred and manured, and the plants 
roughly trimmed, this does very little to clear out chrysalids ; but in 
skimming off the soil with the withered leaves, which have been 
webbed-up in summer, the chrysalids would be carried off also, and 
from one place or other (either on the soil or in it) one might entirely 
hope to get rid of the chrysalids that would start the next year’s 
attack. 
Further details of the life-history of this Moth would be acceptable, 
as great injury is done elsewhere by Moth-caterpillars to Strawberry 
grounds, and very little (beyond this damage) is known of their habits • 
TURNIP- 
Diamond-back Moth. Plutella cruciferarum, Zell. ; Cerostomci 
xylostellci , Curtis. 
Cerostoma xylostella. 
1, caterpillar; 2, eggs ; 3—5, Diamond-back Moth, nat. size and mag. 
The appearance of the Diamond-back Moth caterpillar on the 
Turnip crops is of a good deal of interest, as this attack has only 
been recorded (with us) now and then, and when it does happen it is 
often very destructive. It is open to doubt, however, whether it is not 
more common than has been supposed, and that the attacks may 
have been passed over as those of the “ Nigger ” or Turnip Sawfly 
caterpillar. 
The Diamond-back Moth is of the size figured above at 3, with a 
pale stripe and spots along the hinder edge of the fore wings, which 
give the appearance of a row of diamond-shaped markings running 
along, as shown (magnified) at 4 and 5. These Moths fly in the 
