Basket-Carriers. 127 
bits of the leaves of the tree on which they are feeding, 
forming small cones that are closely adherent to the leaf- 
surfaces. As the larve grow, they augment the size of 
their enclosures or bags from the bottom, until they become 
so large and heavy that they hang instead of remaining 
upright, as they did at first. 
By the end of July the caterpillars become fully grown. 
They are now exceedingly restless, and may be seen wander- 
ing from branch to branch by means of their true legs which 
are projected from the mouths of their baskets, to which 
they keep firm hold, or suspended from a branch ofa tree 
by along silken thread of their own manufacture. When 
very abundant, as they were in certain localities during the 
season just ended, they become a great nuisance, as one can 
hardly walk beneath the trees without being inconvenienced 
by a dozen or more dangling into his face. 
Removed from the case at this stage of existence and 
closely examined, that portion of the body which has been 
covered by the bag will be seen to be soft, and of a dull 
brownish color, inclining to red at the sides, while the three 
anterior segments, which are exposed when the insect is 
feeding or travelling, will be found to be horny and mottled 
with black and white. The pro-legs on the middle and hinder 
segments, which are soft and fleshy, will show themselves 
fringed with numerous hooks, by which the larva is enabled 
to cling to the silken lining of its bag and drag it along 
wherever it goes. The external surface of the bag is rough 
and irregular, often presenting a beautiful ruffle-like appear- 
ance, which is due to the projecting portions of the stems 
and leaves which are woven into it. During their growing- 
period these caterpillars are slow travellers, seldom leaving 
the tree on which they were hatched. When about to change 
into chrysalids, they fasten their bags securely to the twigs 
on which they happen to be, and then undergo their change, 
the male chrysalis being very much smaller than the female, 
hardly one-third its size. 
