THE ENTOMOLOGIST. 109 



"Ashes and Air-slacked Lime. — This, we found, had been 

 extensively used by many of the farmers on the frontier 

 districts, but, as far as we could see or learn, without any 

 perceptible results. 



"Suggestions. — Paris-green, which we regard as the most 

 practical and efficient remedy for this insect-pest is, unfor- 

 tunately, as found in commerce, a substance most variable in 

 its composition. It is an arsenite of copper, and the best 

 qualities contain about sixty per cent, of arsenic, on which 

 its activity depends, but the inferior grades contain a much 

 smaller percentage, and are proportionately less effective, 

 and sometimes almost worthless for this purpose. It is 

 highly important that the public be supplied with a good 

 quality of this useful material, and at as low a price as 

 possible, as an encouragement to its use; and we would 

 strongly urge on the Department the expediency of making 

 such arrangements with the wholesale dealers in Toronto as 

 will enable farmers and others to obtain a reliable preparation 

 at a stated uniform price. We would further suggest that, 

 for convenience sake, the Paris-green be made up in packages 

 containing one pound each, with printed directions for its 

 use, and cautions regarding its poisonous qualities. We 

 would also recommend the Department to strongly urge ujion 

 farmers to plant in future only such quantities of potatoes as 

 they can well look after : one acre, carefully cultivated and 

 watched over, will probably yield more gross results than four 

 or five acres if neglected ; indeed, wherever the beetle is 

 numerous, negligence is sure to be repaid by the utter 

 destruction of the crop." 



Breeding Zygcena Lonicerce. — In reply to the editor's note 

 to my paper on the larva of Zygana Trifolii, in the April 

 number of the 'Entomologist' (Entom. vii. p. 90), I have on 

 only two occasions attempted to rear the larva of a Zyga^na 

 through the winter, and on both occasions the species was 

 Lonicerae. No difficulty was experienced in keeping them 

 alive. In the first brood I kept, some years ago, the larvaj 

 were confined in an ordinary breeding-cage, and, as Mr. 

 Newman says, ceased feeding in the autumn very early, and 

 when very small, and attached themselves to the sides and 

 roof of the cage, though some of them occasionally wandered 

 about a little throughout the winter. A great difficulty 



