105 
moths live long enough thus to enable them to pass the entire winter 
in hibernation. 
With regard to the moths in the large field breeding cages some evi- 
dence was secured. Although scattering moths continued to emerge 
during September and October, all died within a short time, and none 
showed the slightest inclination to hibernate. 
This is, of course, negative evidence, but enough to permit of the 
conclusion that hibernation of the moths in Texas is most unlikely, 
and that if it does occur an extremel}^ small number must hibernate in 
this way compared with the numbers of the insect which pass the win- 
ter in the pupal stage. 
On the other hand, it is quite probable that in southern Florida the 
moths remain more or less active throughout the entire year, since the 
temperature there ordinaril^^ does not fall below 65^^ F. in the winter. 
This is not true hibernation, however. 
INSECTS SOMETIMES MISTAKEN FOR THE BOLLWORM. 
Unlike the Mexican boll weevil, the bollworm has been for so long 
a well known cotton pest that it is rather unusual for planters to con- 
fuse it with any other insect affecting cotton. 
There are, however, two other caterpillars which injure cotton in 
exactly the same manner as the bollworm, so that unless the insects 
themselves are in evidence it is not possible to tell their work from 
that of the genuine bollworm. . Fortunately neither of them is ever 
present in large numbers, and the damage which they cause is imma- 
terial compared to that done by the bollworm. 
The first of these is the cotton cutworm, Prodenia ornitJiogalli 
Guen. (see PI. XVI, figs. 2, 3, 4), which sometimes feeds on the 
squares, flowers, and bolls. It bores into them in exactly the same 
way as the bollworm. It is also a very general feeder, frequently 
occurring on the spiny pigweed growing adjacent to cotton. Larv« 
were seen on cotton only during July and the early part of August, 
disappearing after that date. 
The second is the larva of a butterfly, Calycopis cecrops Fab., bet- 
ter known under the name of Thecla poeas Hbn. The adult oviposits 
on the involucre surrounding the squares, and the resulting larvte eat 
out the contents of the squares, making a large hole in the side similar 
to that left b}^ a good-sized bollworm (see PI. XVI, fig. 1). This 
caterpillar also is most abundant early in the season, generally during 
the latter half of June and the first two weeks in July. No doubt it 
would be much more destructive were it not for the frequency with 
which parasites prey upon it. Out of eight or ten larvie brought into 
the laboratory at various times every one proved to be parasitized. 
