HUMAN AND OTHER SOCIETIES 



separation appears to be difficult or to require 

 some time. 



Observations show that unpalatable insects especially 

 have this habit, but too few have been made to justify 

 a definite statement. If this prove to be a fact, its 

 meaning is clear they do not require this method for 

 the escape of either male or female, because they are not 

 so liable to attack. 



In this connection some observations, which 

 have been made when birds are given copu- 

 lating insects as food, have a bearing one of 

 the two copulating individuals is seized, but 

 instead of both being at once swallowed, the 

 bird for some reason almost always shakes or 

 scrapes off the other. The impression gained 

 is that the bird mistakes the second insect 

 for an adherent foreign body. 



It appears, therefore, that were the male 

 of a copulating pair to be seized by a pre- 

 datory animal, there would be considerable 

 chance of the female escaping. 



The following are methods of self-advertise- 

 ment whereby male insects draw the attack 

 of enemies : 



1. Position. Males rest on the top of the 

 female and are therefore more likely to be 

 seized. In many cases the males are very 

 much larger than the females and completely 



