REPORT OF PROF. R. W. JONES. 
[19] 
merit these black spots are arranged in two rows; tbe spots of the front row are 
closer together on the back; those of the rear row extend down farther on the side. 
Duration of the larva state from fifteen to twenty days. 
( 'hrijsalis. — The larva bores into the ground to assume the pupa state. In my breed- 
ing jars they went down two or three inches, the tube being oblique and open except 
a v< ry slight covering at the top and some of them leaving the entrance uncovered. 
I deem it unnecessary to give a description of the chrysalis, as you doubtless will 
do so from specimens at hand which you will accompany with accurate drawings. 
The fact that the chrysalis of the Boll Worm is under ground will prevent any one 
from confounding it with the chrysalis of the Cotton Worm. 
On the Boll Worm chrysalis there is much more of a yellowish cast and more luster. 
The time during which the pupae remained in ground ranged from eleven to sixteen 
days. 
The whole time, therefore, elapsing between the laying of the egg and the appear- 
and" of the moth from it is from thirty to forty days. 
The moth. — The habits are very much like the moth of Aletia; it is larger, measur- 
ing as much as If inches across the wings, and the- largest being }| inch long. It 
begins to fly soon after sunset. I have watched it a great deal, but never saw it on 
any flowers or leaves except those of cotton. It would often alight in the grass. It 
feeds on the nectar of cotton. I put out lights in the cotton during part of the sum- 
mer ; sonic irert attracted and killed, but the success was not such as I expected. 
I havouotseeu the moth of Heliothis since the cold rainy weather about the last of 
S. |it< Mil.t r. The thermometer early in the morning for several days wasdown to 40° 
Fahrenheit. 
1 have searched diligently without finding one. 
]\:>mhir.— Warm, damp weather favors the multiplication of Heliothis. In dry 
weather, when it was very warm, I have seen the worm dead on the holls without 
having apparently sull'ercd any violence ; t he circumstances were such that I inferred 
it died of heat and lack of moisture. 
The hu vai of Heliothis are very quickly affected by cold rains. Dining the rains 
|ue\ iously referred to, oceun ing at intervals from September 1<» to :{<>, though the tein- 
peratiire was by no means low enough for frost, I found larva- of Heliothis in the bolls 
in a state of torpor, and in some instances they were dead. They are very sensitive 
to cud rains. In many cases throughout the season I found holls which had been 
pierced more or less by Moll Worms, occupied by white foot less grubs of a fly. The 
ll\ deposits its egg in the deca\ ing contents of the boll that has been abandoned by 
the worm. These eggs hat eh and the maggots feed on the putrefying matter. I have 
sen some persons who supposed that the maggots caused the rotting of the boll and 
that the ily injured t he hoi 1 i u o\ i position. This cannot be true. The boll rots be- 
OUM of the- injury from the Boll Worm, and the decaying boll invites the lly. 
Xatural (itcinit'H. — These (so far as I have been able to ascertain) are the same as 
those mentioned in your Bulletin No. which attack Aletia. 
I have observed [he following enemies: 
Birds: Swallows. Bee Martin, King Bird, Bluebird. 
Insects: Spiders, larva* of Lady Bird, Acnnthoccphala J'cmorata, Wheel Bug, Soldier 
Bug, Tiger Beetle. Bats catch many moths. 
Parasites: In the latter part of the season a greal many larva,' of Heliothis ai.d 
Aletia bore a white egg, which was found to be that of ft Tachina. In some in- 
stances the moths hatched out notwithstanding the egg of tho parasite. In other 
cases the chrysalis was destroyed by the grub ; the latter was generally the case. 
Sometimes as many as five eggs of Tachina would be found on one larva of Helio- 
this oi Aletia — more generally on Aletia than Heliothis. This Tachina must be an 
exceedingly formidable enenn of both Aletia and Heliothis. 
Much has been said of the destruction of Heliothis by Ants. I have never seen 
Ants eating them in any state until they had been killed or injured by some other 
agent or had died, except when the worms were confined in jars ; even t his was a very 
rare occurrence. I think I observed it but twice, and both these instances were at 
my residence ; no instance occurred in the laboratory where my work was done. 
Before proceeding to give an account of tho vegetable preparations which I made 
and my experiments with them, I will make a few observations on the 
COTTON AliMY WORM. 
{AUtia Qylina.) 
I will not refer to any facts coming under my notice that are contained in your 
Bulletin No. 3. 
After a protracted season of cloudy days and frequent rains with a warm wind from 
the South, we found Aletia, September 11, in a field near here ; the locality in the field 
was identically the same as that in which you found them October, 1879. From that 
locality they gradually spread over the greater part of tho field of 20 acres in cotton. 
