6 FARMERS’ BULLETIN 675. 
that where one borer is found others are quite likely to be in the 
same tree. ; 
The eggs are inserted through the opening in the bark and are 
placed from one-fourth to one-third of an inch to one side of the 
entrance. In young trees they are deposited between the bark and 
wood (fig. 6), but in old, thick-barked trees they may be placed 
between the layers of bark. 
The yellowish or rust-brown egg (fig. 6) is slightly more than 
one-eighth of an inch long by one twenty-fifth of an inch wide at the 
middle, both ends tapering 
to the rounded points. The 
shell is tough and _ plastic, 
allowing the egg to shape 
itself more or less to the 
space which it occupies in 
the tree. The eggs hatch in 
from 15 to 20 days. Asa 
rule they are placed in the 
tree just above the surface 
of the ground. Where the 
female can find a crack or 
opening between the soil 
and the base of the tree 
large enough to enter, she 
may place eggs an inch or 
so below the surface of the 
ground (figs. 7, 8). Rarely 
the eggs are deposited 
higher in: the tree about a 
crotch or an uneven place 
on the trunk. In the lati- 
Fc, 5.—Adult female of the roundheaded apple. tude of West Virginia and 
ae, porer tb the act of posting ealane. > EMaevlanid! e3e gaa 
progress from the last of 
May until the middle of July, the period being somewhat later in 
the season than the dates given at the higher elevations of the 
mountain districts. 
THE LARVA. 
The larva, or borer (figs. 9, 10), is a whitish, footless grub, with 
brown head and black jaws. It attains a length when full grown of 
nearly an inch and a half. On hatching, the young borers attack the 
inner ‘bark, where they continue to feed until late in the season; 
whereupon some of them, especially in young trees with thin bark, 
