BOMBYCIDS, 125 
the body and the legs are so short as to suggest the larva of the 
Limacodes. The cocoon is formed of the hairs of the caterpillar 
closely woven with silk. 
In Thyridopteryx ephemereformis or the evergreen bag worm, the 
larva constructs a bag or case of silk and pieces of the leaves of its 
food plant, which it carries from place to place as it feeds, and in 
which it resides during its caterpillar state. The larva lives on the 
red cedar and the arbor-vitee, and the pieces of the leaves are laid 
lengthwise of its case or bag. The female moth is wingless and grub- 
like, and never leaves the case, in which it transforms into a pupa 
after having closed up both ends with silk. The male is provided 
with wings which support it in flight. Its body is long and tapering 
and its antenne are pectinated. Several species of this genus are 
natives of this country. 
Halisidota carye. 
An insect sometimes very common and doing considerable damage 
in the Eastern States to hickory, elm, beach, apple and other trees is 
the hickory-tussock moth, Halisidota carye. The larva is a pretty 
caterpillar, an inch and a half long when mature in September. 
The head, feet and belly are black, and the body is covered with 
spreading tufts of hairs, white on the sides, with a crest of black 
tufts along the middle of the back, and long white hairs growing for- 
ward over the head. There are also two pairs of tufts of long black 
hairs placed near either end of the body with a single pair of white 
tufts near the posterior end. The larva makes an oval gray cocoon 
composed largely of its own hairs held together with silken threads. 
This is usually hidden away beneath stones, in the chinks of bark, 
etc. The moth makes its appearance in June. Its wings are ochre 
