2 
sexes have.a corresponding smaller black spot at the upper extremity 
of the hind wings. The body of the female is whitish; that of the male 
is usually darker above. The male is generally a little the smaller. 
The under surface of the hind wings is uniform satiny straw-yellow 
and there are generally two black spots showing through, in both sexes. 
The eggs are fusiform, pale yellowish, and strongly ribbed (fig. 1, 5). 
They are large enough to be readily seen with the unaided eye, and are 
deposited singly, usually on the lower surface of the outer leaves of 
cabbage and other food plants. 
When the caterpillar or ‘““worm’’ becomes full grown it attaches 
itself to a cabbage leaf or other nearby object, fastens itself by means 
of a string-like girdle, and often within the same day transforms to a 
chrysalis of the appearance indicated at figure 1,d. The chrysalis 

Fic. 2.—Imported cabbage butterfly: male, wings expanded, at left; wings folded in natural resting 
position at right—somewhat enlarged (original). 
is of variable color, seeming to be influenced in this respect by the 
object upon which it is placed. The color thus varies from dirty 
gray to yellow, green, and dark gray. The length of the chrysalis 
is a little less than three-fourths of an inch. 
NATURE OF INJURY. 
This cabbage worm has been rightly termed the bane of the cabbage 
grower and the dread of every careful cook and housewife. It begins 
work early in the season, and the principal damage is therefore usually 
to young plants. After riddling the outer leaves, which continue 
afterwards attached to the stalk, it attacks the more tender inner 
leaves as they form, frequently secreting itself in the heads, which are 
made most unsightly by its dark-green excrement, and where it is 
difficult to reach with insecticides. As a result, cabbages before being 
sent to market must be carefully examined and the damaged leaves 
plucked away; and before cooking it is frequently necessary to tear 
the heads apart to see that no disgusting ‘‘worm”’ is lurking within. 
Even after the dish is cooked there is danger of an admixture of animal 
with the vegetable food. In cool weather the caterpillar frequently 
feeds in free exposure on the upper surface of the leaves in the sunshine. 
