56 MANGOLD. 
nineteen miles more, thus showing thirty-nine miles of continuous 
presence of Locusts. 
As, from all observations up to date, it seems to be proved that 
Locust attack cannot establish itself in this country, it is unnecessary 
to enter on means of prevention and remedy. 
MANGOLD. 
Silver Y-Moth. Plusta gamma, Linn. 
PuusIA GAMMA.—1, eggs; 2, caterpillar; 3, chrysalis in cocoon; 4, moth. 
This pretty moth, which takes both its popular and scientific name 
from the silver marking in the shape of the English letter Y and the 
letter in the Greek known as gamma, on the fore wings, is very widely 
distributed in England, Scotland, and Ireland, and often observable 
in summer and autumn, sometimes in great numbers, although it is 
only occasionally that it does much mischief with us. 
Last season, however, towards the end of the summer, this infes- 
tation did a deal of harm to Mangold leafage at a locality in the 
County of Kerry, in the extreme south-west of Ireland. Specimens of 
the cocoons were sent me, from which I found the first moth deve- 
loped on September 11th; and two days afterwards I was favoured 
by the following observations from Prof. P. Hedworth Foulkes, of’ the 
University Extension College, Reading :— 
“‘T have just returned from a tour in Ireland, and while there 
came across, in Co. Kerry, a very serious attack on Mangolds of what 
I now find to be the Plusia gamma. . . . We managed to find a few 
pup, which we sent to you. The attack was over, but the damage 
done was very apparent, and but for the abundant supply of rain I 
doubt whether there would have been a crop at all. I have never 
seen anything like it, and I believe I am right in saying that this 
