53 
The larvae at This time were Dearly all lesa than half grown, only two of fche num- 
ber being nearly gro^ n. These t\\ o w ere found alone in tin- ears of plants 2 and 8. 
In the ear of plant 9, which contained seven Larvae, all lesa than half grown, two 
were discovered being eaten by other-. 
By Julj 25, the second planting in the remaining t wo vacant rows was in its prime, 
but by August 1 had passed its best condition. The time of its greatest attractive- 
ness covered the period of the issnanee of tin- third brood. This brood deposited 
upon the fresh silks to such an extent as to product- an extremely crowded condition, 
for the larvse expected to find food upon snch a limited number of ears. Many ears 
were examined and all presented so nearly the same condition that only u lew counts 
were made. These were: 
Plant. 
Ears. 
Larvae. 
1 
2 
3 
10 
8 
•) 
:; 
Total 
(J 
33 
At the time of this examination. August 1. the larva' were still all very small. 
probably two-Thirds having never molted. In addition, the ears above noted for the 
larva- seldom bore leas than six to a dozen fresh eggs upon their silks, often ranging 
from a dozen to twenty. In the same Held, in ears in which nearly-grown larvae 
were found, only ;i few. if any, younger ones were present. This indicates that the 
crowded condition led the larger and stronger ones to prey upon the others, thna 
giving the victors more room and food. 
The ears of the first planting had now hardened, and no larva- were found in them 
and no fresh eggs were being deposited on their leaves and husks. Egga were still 
being deposited upon the plants of the second planting. The cotton between the 
rows of trap corn was carefully examined during the egg-laying period without 
finding eggs or bored bolls, even in the rows immediately adjoining those of the trap 
corn. 
Experiment :. 
Through the kindness of Mr. A. Curtis, of Curtis, La., a large and fertile tract of 
land, also in Red River bottom, was placed at my disposal for experimental pur- 
poaea. The cotton was planted at the usual time, one row for every fifteen being 
left implanted. This one row was planted in corn April i>. May 7 the rows of young 
corn were examined, but no larva- were found in the plants. A small held of crop 
corn, planted earlier and joining the experimental field on one Bide, had a tew worms 
in the buds of Borne of its plants. The Becond visit was made July :>. when the corn 
was found in splendid condition for egg-deposition. The following studies were 
made of infested ears: 
Plant. 
Ears, 
Lan a-. 
1 
•_> 
5 
1 
1 
1 
1 
t 
10 
l 
1 
•i 

(i 
7 

9 
LO 
Total 
1 
43 
