10 FARMERS” BULLETIN 675. 
resting among the foliage. The females make short flights in search 
of trees in which to oviposit. Rarely they fly for a considerable 
distance, but where suitable trees in which to deposit eggs are abun- 
dant they usually pass their lives within a few rods of the trees from 
which they issue. (Fig. 3.) The males in seeking their mates make 
longer and more frequent flights. Both sexes are active by day and at 
twilight in warm weather, and, although they occasionally fly at night, 
Fic, 11.—Castings of roundheaded apple-tree borers at base of young apple tree. 
(Original. ) 
the hours of darkness are more likely to be spent in quiet among the 
branches. 
The adults do considerable feeding on the bark of twigs and on the 
midribs and stems of leaves (fig. 16), and they also show a fondness 
for the moisture that is contained in castings thrown from trees by 
borers still in their larval stage. This habit is not important from 
the standpoint of any noticeable injury which such feeding does to 
the tree, but it causes the death of some of the beetles when they 
