MEDITERRANEAN MILL OR FLOUR MOTH. 108 
borne in mind, or the leafage will very likely be ruined. The propor- 
tions I give are those for the coarse powder, but in every case the 
strength of the mixture should be tested before broadscale use. 
Much has been usefully written on advantages of mixing the 
powder with plaster or lime, or using milk instead of water for diluting, 
but space forbids entering on these points here; as well as on the great 
variety of sprayers which have gradually been invented or improved 
with the increased use of the arsenite. 
But amongst them the form known as the knapsack sprayer (sold by 
Messrs. Chas. Clark & Co., Windsor Chambers, Great St. Helen’s, E.C.) 
should perhaps be mentioned, as it can conveniently be carried on the 
shoulders in nursery grounds where a wheeled machine could not 
pass; and also in selecting machines or nozzles it is very important 
to choose such as will deliver the spray as a jine general mist, not as 
a wash. 
London-purple, which is an arsenite of lime, and also poisonous, 
may be used similarly to the above, and I have had good results 
reported in proportion of one pound to two hundred gallons of water. 
This is procurable from Messrs. Hemingway & Co., 60, Mark Lane, 
London, E.C. 
Mi bbe MOTH: 
Mediterranean Mill or Flour Moth. Lphestia Kuhniella, Zeller. 
Epuustia Kunninrya.—Moth, magnified; and in outline, life size. 
The Mediterranean Mill or Flour Moth,—which was first recorded 
as observed on the Continent in 1877,* as injurious in Holland in 
1879, and first noticed as mischievous in this country in 1887,—is 
now thoroughly established with us as a perfect pest in any roller 
* In that year M. Kuhn sent the moth and its larva to Prof. Zeller, of Halle, 
Germany, by whom it was described in the ‘ Stettiner Entomologische Zeitung,’ and 
who named the species Kuhniella, after its first observer, M. Kuhn, 
