210 SECRETS OF ANIMAL LIFE 
booty available. The observer once made, as is 
well known, a closed circuit of procession-cater- 
pillars on the rim of a palm-vase in his garden, and 
round this on a silken trail the creatures continued 
crawling in futile circumambulation for seven times 
twenty-four hours, working round and round three 
hundred and thirty-five times and covering a 
distance of a good bit over a quarter of a mile. This 
and a score of similar cases illustrate what Fabre 
calls “the abysmal stupidity” of insects whenever 
the least accident occurs. We should rather say 
the tyranny of instinctive impulse in artificial or 
quite unusual circumstances. “The caterpillars 
in distress, starved, shelterless, chilled with cold at 
night, cling obstinately to the silk ribbon covered 
hundreds of times, because they lack the rudi- 
mentary glimmers of reason which would advise 
them to abandon it.’ We should rather say 
because the hand of the past in the form of a routine 
of response enregistered in the nervous system was 
too strong to allow of any initiative in the present. 
To what theory do these interesting facts point? 
It seems to us that Bergson was right in insisting 
that instinctive behavior is on a different evolu- 
tionary tack from intelligent behavior. The latter 
is inferential and reflective ; the former is impulsive 
and intuitive. Intelligence implies an appreciation 
of relations; instinct implies an appreciation of a 
particular configuration of circumstances. In- 
telligence is as much made as born; instinctive 
capacity is much more inborn than made. In the 
