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MUSTARD 
Mustard Beetles. PhcBdon hetulce, Linn.; Turnip Flea-beetle, 
Haltica [Phyllotreta) undulata, Kuts. ; Turnip-flower Beetle, 
Meligethes mneus, Fab. ; and Turnip-seed Weevil, Ceutorhynchus 
assimilis, Payk. 
Mustaed Beetle. 
Mustard Beetle and maggot, nat. size and magnified. 
The replies with which I have been favoured by some of our 
leading Mustard growers to the circulars issued by the Eoyal 
Agricultural Society, requesting observations regarding the habits of 
the Mustard Beetle, and measures found useful for prevention of its 
ravages, contain much serviceable information, especially as to the 
great variety of places in which the Mustard Beetles, which start the 
spring attack, spend the preceding winter, and also as to means of 
lessening amount of attack (and amount of injury from what may 
occur) by regular agricultural treatment. 
Also, by means of specimens with which I have been favoured 
we have been enabled to make out clearly which of the various 
maggots that are to be found on the Mustard-plant is that of the true 
Mustard Beetle, and thus to trace its history with certainty, which, as 
far as I am aware, had not previously been done. 
Further, the fact has been very clearly brought to light that the 
mischief ascribed to what is commonly known as the Mustard Beetle 
is by no means entirely caused by this one kind. It is largely shared, 
when the plant is in its first leaves, by the Turnip Flea-beetle or Fly, 
and next, when the plant is knotting for flower, by the Turnip-flower 
Beetle, or Meligethes ceneus. Other kinds of beetles are also present, as 
the small dark grey Turnip-seed Weevil (the Ceutorhynchus assimilis), 
and do more or less damage ; but the two sorts first mentioned are 
present frequently and to a serious extent, and the Meligethes, which 
are not at all unlike the true Mustard Beetle, excepting in being 
