10 
BULLETIN 723, U. S. DEPARTMENT OF AGRICULTURE. 
Figure 6 shows on the left the characteristic opening made by the 
ordinary bollworm (Chlorklea obsoleta). It is of large size and 
surrounded by a raised margin. The exit holes of the pink boll- 
worm, on the left, are much smaller, more regular, and without raised 
Figure 7 shows the appearance of locks of cotton, exhibiting typi- 
cal injury by the pink bollworm. 
Figure 8 shows individual seeds infested by the pink bollworm. 
In the lower line are the "double seeds." These are frequently 
Fig. 6. — Two bolls showing distinction between exit holes of the ordinary bollworm 
or corn earworm (Chloridea obsoleta) and those of the pink bollworm (Pcctinophora 
gossypicUa). The large hole in the boll to the left was made by the ordinary boll- 
worm and the two small ones in the boll to the right are typical of the pink boll- 
worm. 
found as the result of the webbing together of two seeds by larva) of 
the later stages in order to obtain more room for pupation. 
Figures 9 and 10 illustrate the pink bollworm in a burr and the 
typical opening made by this insect when it makes its way from one 
lock to another. 
Although these descriptions may help in enabling any one to 
determine whether the pink bollworm- is present in a cotton field, it 
will always he best to send any specimens to an entomologist without 
delay for authoritative determination. It is extremely important 
that any possible infestation by this insect be brought to attention 
