94 MAN AN ADAPTIVE MECHANISM 



there resulted a transformation of energy and a move- 

 ment exactly appropriate to the phylogenetic association 

 of organism and insect. In the recognition of this 

 inevitable interaction is discovered an important 

 biologic law a law as absolute as is the law of gravity. 

 It is the law of Phylogenetic Association, according to 

 which the transformation of energy for adaptive 

 ends is based upon the adaptive responses of the or- 

 ganism during its evolution. It is easy to show that 

 responses to contact ceptor stimuli are in accordance 

 with this law, for these reactions are readily divisible 

 into their component parts. The responses initiated 

 by distance ceptors are not so easily comprehended, 

 however, as they are composed of a group or series 

 of motor, chemical and sensory reactions which must 

 be identified before their conformity to the law of 

 phylogenetic association is established. Before dis- 

 cussing the reactions to distance ceptor stimuli, there- 

 fore, it is necessary to study the mode of action of the 

 chemical ceptor stimuli. 



