91 
number of ])ollworms was noted and. they were then allowed to pupate 
separatel}^ After emergence a comparison was made, but it failed to 
show even the slightest relation. 
ANATOMY AND SEXUAL DIFFERENCES. 
It is bej^ond the scope of the present bulletin to consider in detail 
the anatoni}^ of the boUworm moth. Most important in relation to the 
economic position of the insect are the organs concerned in feeding 
and reproduction. In common with other lepidopterous insects, the 
bollworm moth feeds only on liquids, which are sucked up through 
the long, flexible proboscis. The latter is about three-fourths as long 
as the body and when not in use is coiled tightl}^ beneath the head. 
When feeding it is held out nearly straight, a little curved near the 
tip, which is applied to the nectaries on the squares when feeding on 
cotton. Owing to the considerable length of the proboscis it can also 
reach well within the cotton flowers. The food is drawn into the pro- 
boscis by means of the large muscular pharynx which acts as a pump. 
The pharynx connects with the food reservoir, or stomach, by a 
slender oesophagus. If overfed, as is often the case when food is 
plenty, the stomach becomes greatly swollen. 
In the female almost the entire cavity of the abdomen is filled by 
the ovaries. These organs consist of eight long tubules, four to each 
side of the bod}^, although owing to their great length they are coiled 
and folded upon one another many times. Near the tip of the abdo- 
men they unite to form a single tube through which the eggs pass one 
by one, as they are laid. The more mature eggs are near the end of 
^ach tubule and those still in the process of formation near the farther 
and more slender tip. The distal portion of the oviduct is hard and 
chitinized, forming the ovipositor, by means of which the eggs are 
placed on the plants. When the moth emerges the eggs in the ovaries 
are small, but develop rapidly during the first day or two, at the end 
of which time oviposition may begin. From counts made of the eggs 
present in newly hatched moths, it seems probable that there is a con- 
tinual formation of new eggs during life. 
In the male the abdomen is usually narrower than in the female and 
the sides are more nearly parallel instead of bulging. The tip is also 
less pointed and more squarely cut off'. The amount of food in the 
abdomen, however, very often conceals these characters, and others 
must be relied upon for the separation of the sexes. A second charac- 
ter which is sometimes available is the presence of certain spines on 
the front margin of the wing near the base. In the male there is a 
single long curved spine and in the female two equal smaller ones on 
each hind wing. They are not always easy to see, however, and are 
easily broken off. When such is the case it is necessary to resort to 
dissection to be positive. 
