50 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 11 
One interesting point in the above experiments is the location of the 
eggs of the peach borer. The female usually deposits eggs on peach 
trees only, but in the above experiments the eggs were deposited to 
some extent on the cage and floor of the cage. This indicates that the 
female does not always deposit eggs on peach trees which agrees with 
observations made by various investigators. 
Fig. 3. See text for explanation. 
Eggs 
The egg of the peach borer is a small flattened ellipsoidal body with 
one end broader (more obtuse) than the other (Fig. 3, 1 and 2). The 
egg averages .65 mm. (1/40 of an inch) in length and .4 mm. (1/60 of 
an inch) at its greatest width. The two broad surfaces of the egg are 
flattened and slightly concave (d) and one of these surfaces is adjacent 
to the object on which the egg is deposited. The egg has a soft chest- 
