86 THE HAUNTS OF LIFE 
secured by trying every niche of opportunity. 
It is the same with the Storm Petrel; it has 
survived by its originality. 
OPEN-SEA INSECTS 
A fine example of what we may call the 
adventurousness or insurgence of life is to be 
Fic. 5.—SEA-SKIMMER, HALoBATEs. 
An Insect that runs about on the Open Sea. 
found in the family of sea-skimmers (Halo- 
batide), wingless insects that run along the 
surface of the water, often a hundred miles 
from land. ‘They are closely related to the 
