332 AMERICAN SPIDERS AND THEIR SPINNINGWORK. 
flavicornis, a European species which is often constructed of small shells; 
and Fig. 324 illustrates the case or nest of the European Limnophilus pel- 
lucidus, which is formed of large pieces of leaves laid flat over each other. 
I am not familiar with the larva’s method of putting together these 
nests, although I have some very interesting ones in my possession, not 
greatly differing in construction from those which are here illustrated. 
The principle on which the various particles of material are collected and 
placed together to form the perfect cover made by the little worm cannot 
differ greatly, judging from architecture alone, from those which regulate 
Fic, 319. 
Fia, 318.* 
Nests of Theridium (Fig. 318), and the Bag worm (Fig. 319). 
the behavior of Theridium riparium when she builds the nests described 
upon the preceding pages. (Fig. 318.) 
A like reflection is suggested by the work of the well known bag worm, 
or basket worm, Theridopterix ephemereformis. (Fig. 319.) This is the 
: caterpillar of a species of moth, sometimes known as the house 
Theridi- yilder moth (Oiketici). The insects are also called Canephore, 
eal or basket carriers, and the Germans call them Sacktrager, or 
Worm, sack bearer. The baskets of the above species are among the 
most familiar objects in this geographical district, and may be 
seen hanging in multitudes to the limbs of trees after the leaves have 
fallen in autumn. I have been greatly interested in studying the whole 
process by which these interesting objects are made, and have described it 
elsewhere.? 
clay in natural site ; that below of material artificially supplied. “Science Gossip,” January, 
1868, page 12, sq. 
2In my “Tenants of an Old Farm,” Chapter XIX., “Housekeeping in a Basket.” 
