ADAPTATION FOR THE SPECIES I4!I 
game. It is the fittest that survive. When this pro- 
cedure goes on generation after generation, the result 
must necessarily be that the spiders grow fitter and 
fitter for their work. This method is hard on the 
little spider, but it makes good spiders. 
Most insects die before their eggs hatch; accord- 
ingly they can pay no attention to their own children. 
Whatever arrangements are provided for the safety 
and strength of these offspring must be provided be- 
fore they appear. About the only care the majority 
of insects take in this direction is to see that the eggs 
are placed where the young shall find food as soon 
as they emerge. Insects’ eggs are very small, and as 
a consequence the creatures which emerge from them 
are likewise exceedingly minute. As a result they 
cannot be expected to hunt far for their food. Differ- 
ent insects use different devices by which to overcome 
this difficulty. The katydid, for instance, must die 
with the approach of fall. Her children will not ap- 
pear until the following year. Her food consists of 
leaves, but to lay the eggs in such a situation would 
be a fatal process, because the leaf will drop off 
before the eggs hatch. Accordingly, the katydid lays 
its shield-shaped eggs in a double row near the end of 
a young twig. Next year when the weather is suffi- 
ciently warm to hatch katydids, it is also warm 
enough to force the buds on the end of the twigs. 
