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760. S. Demuth will leave soon for Winchester, Va., to resume the work on the 
GC bees of spraying fruit trees, in cooperation with the Office of Deciduous 
‘Ix ect Investigations. The work will also probably be continued at a more 
point at a later date. 
DECIDUOUS-FRUIT INSECT INVESTIGATIONS. 
A. Iles Quaintance, In Charge. 
D. Isely, who has been in Washington preparing his notes on grape-insect inves- 
pub, has returned to the field for the purpose of resuming investigations of 
j a B, Blakeslee , who has been in Washington Linon nh notes on the subject of 
5 field investigations, has returned to the field to resume his investigations of 
oac | insects and will spend a good deal of his time this season in the neighborhood 
‘Springfield, W. Va., investigating the peach-tree borer. 
FOREST INSECT INVESTIGATIONS 
A, D. Hopkins, In Charge. 
A NEW PLANT-INSECT CAGE. 
on? A. Rohwer has recently designed and had constructed a small cage to be used 
O ‘confine, under natural conditions, growing plants. 
_ This cage is a bronze wire cylinder, the top of which is closed by a lid which 
on like the lid of an ash can, the lower end is open and fits against the soil. 
frame is made of galvanized iron. The top and bottom are bands two inches wide 
the edges turned and are held apart by three strips of one inch by one-eighth 
galvanized iron which project six inches below the bottom of the cage so they 
e driven into the ground to hold the cage in place. The uprights are soldered 
i] bands on the inside. The bronze wire is held in place by solder. The lid is 
vanized iron band over the top of which is bronze wire. The cage is eighteen 
ys high by fourteen inches in diameter, On one side is soldered a one and one- 
inch screw top which Ra iorde an easy way of introducing insects after the cage 
4 | place. 
This gage is very  agetul in experiments on insects working on living plants as 
t is possible to grow, under nearly natural conditions, clean host plants and to 
fest them with known insects. At the Hastern Field Station it is known as the G 
pe cage and is used in studies on insects of the Genus Evetria and its parasites. 
pes coma tion concerning its construction or cost may be had through correspon-— 
, - . 
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