CASE-BEARERS FEEDING ON THE LEAVES 307 
short case, which it carries to a twig and in which it spends the 
winter. 
The remedy is an application of arsenate of lead or Paris green as 
soon as the caterpillars are seen feeding. 
Fic. 467.— Larval cases of the Pistol Case-bearer. Enlarged. Original. 
The Pistol Case-bearer (Coleophora malivorella Riley) has a similar 
life history and does about the same injury. It is distinguished from 
the above by the shape of the larval case, which in this species is 
slender, somewhat tapering, and distinctly 
curved. 
The Bag-worm 
(Thyridopteryx ephemereformis Steph.) 
This curious larva makes a bag out of 
silk and pieces of leaves as a protection 
to its body. The female is wingless and 
never leaves 
the bag. The 
male isa small, 
} clear- winged 
w moth. Eggs 
\ are deposited Fig. 468. — Larval case of the 
Bag-w . Original. 
by the female Rn eer 
within the bag, and remain there until the 
Fic. 469.— Adult male of 
the Bag-worm. Slightly following spring. : : . 
enlarged. Original, Removal of the bags in winter will put a 
