amine the cabbage for small green worms which
vary from one fourth to a little over an inch in length. What is the
nature of their work on the leaf? Where do they feed most, on the outer
or inner leaves? Do they eat the entire leaf? How does the work of the
young worms differ from that of the larger ones? Do they spin silk? Are
they on the top or under side of the leaf? Examine under the dead and
dried leaves at the ground and see if you can find small, hard, gray
objects which have sharp angles and which are tied to the leaf with a
cord of silk. What are these objects? Watch the miller as she visits the
cabbage and see if you can find the small eggs which she lays on the
under side of the leaves. When she visits a cabbage plant she bends her
body up under the outer leaves and stops but a moment, fluttering all
the while as she sticks the small egg to the leaf. It is about the size
of a small crumb of bread. What does the miller feed on? Does she visit
flowers? If so, what flowers?

[Illustration: Pupa or chrysalis of cabbage miller.]

BREEDING WORK

Collect a few of the worms and put them in a glass jar with a piece of
cabbage leaf. Examine them carefully and watch them crawl. How many legs
do they have? Where are they placed on the body? How can they use so
many legs while crawling? How many joints are there to the body? Note
the short fine hair all over the body which gives it the appearance of
green velvet. What color is the head? How does the caterpillar feed?
Write a brief description of the worm. Do not mistake it for the cabbage
span-worm which is also green, but which walks by humping up its back.

[Illustration: Cabbage miller on red clover blossom.]

Keep the cabbage worms in the jar for a few days and watch them
disappear. After they have disappeared, what is left in the jar? These
are the chrysalids or pupae of the insect and later from them will come
the millers. Take one of the pupae in your hand and see if it can move.
If it is in the summer the miller will appear in a week, but if it is in
the late fall it will simply pass the winter in the pupa stage. Watch
the miller escape from the pupal case and describe it. Examine the
miller carefully and describe briefly the number of legs, wings,
segments of body, sucking tube and color markings. Make careful drawings
of the caterpillar, chrysalis and butterfly. What gives the color to the
wings? Rub the wings between your fingers and see if the color come