ACTIVE WORMS FEEDING WITHIN WEBBED LEAVES 297 
webs may be made in succession by the same colony. The caterpil- 
lars have a dark body, covered with long, whitish hairs. The work 
is entirely distinct from that of the tent caterpillar, which builds its 
nest in the forks of branches and does not include any foliage in it. 
When full grown, the cater- 
pillars disperse, hide away, and 
spin up cocoons, from which 
the adult moths emerge the fol- 
lowing summer. In the South 
there are two generations. 
Trees may be sprayed with 
arsenate of lead or Paris green, 
and the caterpillars thus killed 
when they extend their webs 
over new and poisoned foliage. 
Or the nests may be cut off 
when first observed, and de- 
stroyed, along with the cater- 
pillars in them. 
The Leaf Crumpler 
(Mineola indiginella Zell.) 
In winter dark little twisted 
Fie. 442.— Work of the Leaf Crumpler. 
: ; F j Original. 
cases of silk mixed with bits 
of leaves may be seen attached to twigs of apple trees. From these, 
brownish red caterpillars, one fourth of an inch long, come out in 
Fic. 448.— Larva of the Leaf Crum- 
pler. Enlarged and natural size. Fic. 444.— Larval cases of the Leaf 
Original. Crumpler on twig. Original. 
