New Yorx AGricutturRAL Exprrment STATION. TAT 
surface of the leaf they loop the body like the “ Measuring 
Worms” or “Geometers.” From this habit they are sometimes 
called “Cabbage Loopers.” 
Like the cabbage caterpillar they are only satisfied with feed- 
ing while very young on the outer leaves of the cabbage. As 
they increase in size they work toward the center of the head, 
and, if these are not fully formed, they will work into them as 
bad or worse than the cabbage caterpillar does. When about. 
one-fourth grown the caterpillars or larve are nearly as dark 
green as the cabbage caterpillar, but are distinctly marked with 
white longitudinal lines. When half to two-thirds grown they 
have changed to a light green and the markings are not distinct. 
There are very few hairs on the body. Two sizes of the larva 
are shown at Figure 5, Plate I. When full grown the caterpillar, 
instead of crawling away to pupate around some old fence or dead 
weed, like the imported cabbage caterpillar, crawls to the under- 
side of a leaf, usually one of the outer leaves of the cabbage, spins 
a thin silken cocoon and changes to a chrysalis. The chrysalis 
can be seen through the cocoon. It changes from the chrysalis. 
to the adult moth in 10 days or two weeks. 
The male moth differs from the female by having a conspicuous 
tuft of brown hairs on each side of the abdomen near the caudal 
end; also in having the white marks on the fore wings in the 
form of a dot and a V-shaped mark, while in the female the mark 
resembles the figure 8. These differences are nicely shown in 
Figs. 4 and 4', Plate I. The hind wings in both male and female 
are mouse colored, with the margins fringed with white and fawn 
colored hairs. Dr. Lintner* states that there are only two- 
broods of this motha year. The larve were observed here in 
large numbers as early as September 10. Moths issued in labora- 
tory as late as December 1. Eggs and larve were found on cab- 
bage as late as November 19. From the number of caterpillars 
found by September 10, it would seem that these must belong to. 
the second brood; if so, there must be at least three broods a 
year on Long Island. 
Dr. Thomast expresses the opinion that they hibernate in the 
adult stage. At least part of the last brood passes the winter in 



* Sixth Report on Injurious and Other Insects of N. Y., 1890, p. 184. 
+ Ninth Annual Report Noxious and Bent ficial Insects of Ili., 1&80, p. 43. 
