1906] 
EMERTOX—COXIOPTERYX VICIXA 
in the upper side large enough to crawl through, and leaves the pupa skin half 
way out. 
The larva is flattened sidewise like an amphipod crustacean and lies 
on its side in the cocoon. It is motionless when removed, even after several 
days in a warm room. It resembles closely the larva of C. psociformis Curtis 
described and figured by Schlectendal in the proceedings of the A'erein fur 
Naturkunde of Zwickau. Saxony, in 1881. The head resembles it closely and 
the mandibles are short and pointed as in psociformis, but the antennae ami legs 
are much shorter than in that species. The whole body is roughened with fine 
rounded elevations and each segment is crossed by a single row of short hairs. 
Schlectendal found his larVcTe in winter under loose bark of oak trees at 
Halle in cocoons resembling those of s])iders and was as much astonished as 
I was at the discovery. He, however, concluded that the cocoons were really 
those of spiders and that the larvae had eaten the eggs. The cocoons differ in 
structure from any spider cocoons with which I am acejuainted and it seems 
more probable that they are made by the larvae themselves when about to 
hibernate. 
A larva in a cocoon found Xovember 9 and ke])t in the house in a" 
tight bottle matured and came out of the cocoon January 30. Cocoons 
collected January 31 and then containing larva* had pupae in them March i, 
and the mature insects came out March 12 to .April i. 
