The Cionus 
off. When you have no sort of grapnel to 
hold on by, the idea of clothing yourself in 
glue, so that you may shift your position 
without danger of falling, even in a gust of 
wind, is an original invention of which, as yet, 
I know no other instance. 
Our grubs are easily reared. Placed in a 
glass jar, with a few tender twigs of the plant 
that feeds them, they go on browsing for 
some time and then make themselves a pretty 
empulla in which the transformation will 
take place. To observe this performance 
and discover the method employed was the 
chief purpose of my enquiry. I succeeded, 
though not without a great expenditure of 
assiduity. 
All its life long, the larva is smeared, on 
both its dorsal and its ventral surface, with 
a viscous, colourless, strongly adhesive fluid. 
Touch the creature lightly, anywhere, with 
the tip of a camel-hair pencil. The glutinous 
matter yields and draws out into a thread 
of acertain length. Repeat the touch in the 
hot sunshine, in very dry weather. The vis- 
cosity is not diminished. Our varnishes dry 
up; the grub’s does not; and this is a property 
of the greatest value, enabling the feeble 
315 
