The Cionus 
cative over the whole surface of its body by 
taking a long walk, the last of its larval life. 
7 P.M.—The larva is once more motion- 
less, lying flat on its belly. Is this the end 
of its preparations? Not yet. The globu- 
lar structure must have a foundation, a base 
on which the grub can support itself in order 
to dilate its ampulla. 
8 P.M.—Round the head and the fore- 
part of the thorax, which, like the rest of the 
body, are touching the slip of glass, a border 
of pure white now appears, as though snow 
had fallen at these points. This forms a 
sort of horse-shoe enclosing an area in which 
the snowy deposit is continued in a vague 
mist. From the base of this border some 
threads of the same white substance radiate 
in short tufts. This structure denotes work 
done with the mouth, a miniature wire-draw- 
ing. And in fact no such white substance is 
seen anywhere except around the head. 
Thus the creature’s two ends take part in 
the building of the hut: the one in front 
provides the foundations, the one behind 
provides the edifice. 
10 P.M.—The larva shrinks. With its 
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