THE CODLING MOTH IN THE OZARKS. af 
The last unhatched eggs of the first brood were found May 27. 
Empty shells were numerous in the orchard at that time, but only 3 
unhatched eggs were found, all of them in the ‘‘black-spot”’ stage. 
This date seems to be near the end of the first brood of eggs, and 
agrees with the issuing records of moths from collected wintering 
material, practically all moths having emerged by this time. 
In 1907 the last of the first-brood eggs were obtained June 2, 
having been laid in a cage by the last moths to emerge from collected 
wintering material kept in the laboratory. 
Place of oviposition.—Of 67 eggs collected in the orchard April 27, 
53 occurred on the upper side of leaves, 13 on the back of leaves, and 
1 on a twig. While bagging fruit on May 6 a careful examination 
for eggs was made on all the leaves, twigs, and fruit to be inclosed in 
the bags. There were 78 eggs or empty shells found, of which 76 
were on the upper surface of leaves, 1 on a twig, and 1 on the side 
of the fruit. Since but few apples became wormy after being bagged, 
this represents nearly the whole number of eggs present on the parts 
examined. Some of the eggs were at a considerable distance from 
any fruit, but as a rule the moths seemed to have selected the fruit 
clusters, possibly only because the foliage there was denser than on 
isolated shoots. 
In the cages eggs were placed indiscriminately on all parts of twigs, 
leaves, fruit, framework of cage, and on the glass panes, always, 
however, on the side of the cage from which most light came. Twigs 
placed in the middle or on the darker side of the cage were disregarded, 
the moths depositing their eggs on the side or bottom of the cage 
while struggling to fly out toward the light. 
Fertility. Practically all eggs observed were fertile, whether laid 
in cages or collected in the orchard. Often a few sterile eggs were 
deposited in the cages before oviposition proper began. When eggs 
were laid in considerable numbers they were all fertile. 
Length of incubation period.—The egg stage was greatly lengthened 
by periods of cool weather such as are apt to occur in early spring. 
The first eggs obtained in cages were deposited the night of April 19. 
These were subjected to very cool weather, including frost, and gave 
a maximum period of 21 days, or an average of 19.6 days. Eggs 
deposited the night of April 24 experienced part of the same spell of 
cool weather, including frost, and required an average of 17 days to 
hatch. With the advent of warm weather the egg stage was rapidly 
shortened. Eggs deposited May 8 hatched in 84 days, and the lot 
laid May 10 hatched in 74 days. Undoubtedly the last eggs of the 
first brood would show the uniform period of 5 days required for 
second-brood and third-brood eggs laid during June, July, and August. 
In Table VII are shown the incubation records of first-brood eges 
deposited in outdoor cages. 
30490°—Bull. 80—12 2 
