38 
male, a narrow yellow ring on the second and fourth segments, 
broadening below on the fourth to cover the whole surface. In the 
female the fourth segment is yellow both above and below. The 
head and antennse are black, the femora blue-black, and the tibiae 
yellow. The fore wings are transparent, except the borders and 
the discal mark, which are blue-black. The outer margin is marked 
with yellow rays. The hind wings are transparent, with very nar- 
row blue-black margins. The spread of the wings is from i8 — 22 
mm. 
This insect can evidently best be destroyed by cutting out and 
burning infested branches in winter or early spring. 
The Bag-worm 
{Thyridoptcryx ephciiicrcrforinis Harris) 
One sometimes sees hanging from the branches of trees, in late 
summer or in fall or winter, especially in the southern part of the 
state, rough excrescences, about two inches long, shaped somewhat 
like a spindle full of yarn, soft to the touch, and more or less covered 
with pieces of dead leaves which seem to be woven into their web- 
like substance (Fig. 41, /). In summer it may be further noticed 
Fig. 41. Bagworm, Thyridopteryx ephetnerivforinis: a, larva; b 
and c, pupa, side and back views; d. adult; e, case containing the 
eggs; /, larva in case; g, eggs. Natural size. 
that these spindle-shaped sacks can creep along the twig, and that 
there projects from the end nearest the twig the head and front part 
of a caterpillar, the remainder of which is enclosed in the protect- 
ing bag. In winter this is hung to the tree by a rather tough liga- 
ment composed of material like spider-web. An examination of 
these peculiar bodies at that season will show either that they are 
