Wlarvels of the Universe 891 
like leaf-feeding larvee, to get its full size before autumn comes with its falling leaves. Shut up in the 
tree, winter and summer are much the same to it ; but at length it arrives at the full-fed stage. 
Before becoming a chrysalis it makes all the preparation it can for its emergence in the winged form, 
and to that end carries its burrow close up to or partly through, the bark, leaving little thickness 
to be cut through by the jaws of the perfect insect. When the latter splits up the chrysalis skin 
it finds itself restricted to creeping through a tunnel, whereas it wishes to exercise its newly-acquired 
wings. Finding a certain thickness of bark bars its way, it sets to work with its jaws and cuts 
through the impediment. But if the tree has been cut up and made into roof-beams, floor-boards, 
shelves or boxes, the poor Horn-tail may find all kinds of obstacles substituted for, or added to, 
the natural ones. 
Thus, infected beams have been covered with sheet-lead, but the MHorn-tail has worked 
through it. Their burrowed wood has been worked up into a box, the box filled with ball-cartridges, 
and the Horn-tail has been so unfortunately placed that it has eaten through the wood only to find 
that the bullet end of the cartridges lay in the way ; but the indomitable perseverance of the Horn- 
tail has carried it through the bullets even. 
We believe that a package of cartridges so treated in the arsenal at Grenoble is still to be 
also in France—military 
seen in one of the French museums. In a similar establishment 
uniforms were stored upon a shelf containing one of these insects, and on emergence the poor 
creature had to make its way through a pile of woollen trousers. 
THE MIGHTY SEA-SPIDER. 
This specimen with its long slender limbs can cover a space of nearly two feet. It is found at depths varying from one 
thousand four hundred to one thousand six hundred fathoms. These deep-sea forms of Sea-spiders are usually of an orange or 
bright red colour, and are generally larger than the in-shore species. 
