94 
and adults, were found. jNIore than half of the plants were killed. 
At one infested spot in Montana the species has prevented the prof- 
itable growing of strawberries for eight or ten years. 
Like the box-elder bug, these beetles have perhaps attracted 
more attention by entering houses when in search of winter quarters 
than by their injuries to the strawberry plant. In late summer they 
wander about in large . numbers in the neighborhood of infested 
sti'awberry plots, and if a house happens to be near by they often 
come into it in astonishing numbers. In one case more than four 
hundred were killed in one evening in a single room, and the beetles 
traveled all over the house, crawling up the walls to the ceiling only 
to drop to the floor, and making this journey over and over again. 
They are not attracted by lights, as some have supposed. 
RKMEDIAL MEASURES 
From experiments made by us, and also at the Montana sta- 
tion, it appears that the beetles avoid leaves which have been sprayed 
with arsenical poisons, and feed then upon other parts of the plant. 
On the other hand, notwithstanding the general feeding habits 
of both larva and adult, there is evidence that a satisfactory rotation 
can be arranged that will completely clear an infested plot. Miss 
Patch examined one infested area in which there were no culti- 
vated strawberry plants. She foUnd the larvae infesting roots of 
wild strawberry, grasses, and white clover, but an examination of 
large potato fields close at hand revealed no signs of the insect. Mr. 
Cooley also suggests the potato as a possible crop for this purpose. 
He suggests that infestation of strawberry plots probably does not 
originate among the strawberries, but is due to the planting of 
ground already infested. In this connection the history of the 
Alpha plot is of interest. It was used for a strawberry crop, then 
set with young fruit trees for two or three years, then used again 
for strawberries, the injury first being noted in the third season of 
this second planting to strawberries. Cooley mentions an instance 
in ]\Iontana where infested strawberry land was planted to other 
crops for a few years, and when subsequently replanted with straw- 
berries was not re-infested. 
The Beackcerry Leae-roleer 
{Bxartema pennnndaniiui Clem.) 
The larvae of this leaf-roller were -found at Decatur, 111.. June 
25, 1905, feeding in small numbers on blackberry, raspberry and 
strawberry plants. 
They were reared to the adult (Fig. 24) in the insectary, and 
the moths deposited eggs, singly, on the glass of the breeding cage. 
