- 4 - 
the fore wing, two black spots, and there is another spot in line with 
these on the anterior border of the hind wing. On the under side, 
the female has two black spots on the fore wing, and the tip of the 
fore wing and the entire surface of the hind wing are sulphur 
yellow. 
The male [Fig. 2] differs from the female by having but one 
black spot on the fore wing above, and being a little whiter in 
color. These butterflies appear early in the spring, and the female 
is ready to deposit eggs for the first brood of worms as soon as early 
cabbages are transplanted into the gardens. The.eggs are elongate, 
yellowish white objects, and just large enough to be plainly seen 
with the naked eye. They are deposited singly during daylight, 
and nearly always upon the outer surface of the spreading leaves, 
and not upon the cabbage head. When the butterflies are flitting 
abundantly over the cabbages, a moment’s watching will be re¬ 
warded by seeing one or more of these eggs deposited. In a very 
few days the eggs hatch, and the little green worms begin to feed 
upon the leaves. They gradually work inward to the head, and 
Fig. 3. 
late in the season a large number of worms that are half grown or 
more may be found eating into the base of the head, often entirely 
ruining it. In from two to three weeks after hatching the worms 
become mature [Fig. 3 a], and then change to a green chrysalis 
[Fig. 3 6], in which stage they eat nothing, and remain quiet unless 
disturbed. If the worms were verv numerous, some of these 
chrysalids may be found attached to the leaves of the cabbage, but 
most of the worms will crawl away to undergo their transforma¬ 
tions upon other near objects. 
In the course of a week or ten days, the chrysalis splits along 
the back and the butterfly emerges. In a few days more the females 
begin to deposit eggs for a second brood of worms. 
How many rounds of development there are in a year depends 
upon the length of the summer season. There are probably not 
