OF INJURIOUS INSECTS. 
25 
Topping the shoots, taking off the infested parts, and destroying the 
insects is mentioned by Mr. Dunn as the speediest and most effective 
remedy; it ought to be done at once, on the first appearance of the 
Aphis, to prevent it spreading. Mr. E. A. Fitch mentions that on 
the 7th of July he noticed one of his fields of Beans nine acres in 
extent, at Maldon, covered with “ Collier.” The tops of the Beans of 
about six acres were cut off with brushing hooks by men walking 
along the steteh furrows, but the attack went off as suddenly as it 
appeared; no difference was noticeable in its amount between the 
six acres cut back and the three not meddled with, but it is not men¬ 
tioned whether the cut tops with “ Colliers” on them were removed. 
The first observation of the attack was on a day of much rainfall, 
which proved to be of some days’ duration, and presumably cleared 
the Aphides. Mr. James Long, of Old Field, Henlow, Herts, mentions 
the appearance of the Collier on his ground early in July, and much 
damage threatened; saved, however, by the violent rains, which 
cleared the plant-lice, and invigorated the growth of the crop. 
PlERIS BrASSICJE. 
Large White Cabbage Butterfly, eggs, larva, and pupa. Parasite Fly, 
Pteromalus brassicce, natural size and magnified. 
11 . Pieris brassicae. Cabbage Butterfly. Mr. M‘Finlay observes 
that after the dry weather set in the Cabbage Butterfly was to be seen 
in large numbers in gardens near Dingwall, and proved very 
destructive. The remedy (recommended by Mr. Malcolm Dunn in 
the Report for 1879) of giving a sprinkling of fine salt: was found 
serviceable, as also the simple plan of laying some brandies of Broom 
E 
