отношений педоморфных насекомых должно основываться в первую оче- 

 редь на внимательной оценке древних структур, которые сохраняются 

 у имаго, и соответственном критическом анализе различных особенностей 

 их онтогенетических стадий. 



SUMMARY 



The feature of a long lasting onthogenetical insect development, accompanied by 

 shortening of the life-time, by progress of aphangy and often by loss of moving ability 

 by adults is discussed. This feature called pedomorphosis or desimaginisation consists 

 in the degeneration of the imaginai phase of the insects excepting the fertilisation — abi- 

 lity. A wide extension of this feature by insects and its phylogenetical importance is re- 

 corded. Attempt is made to explain the reasons of the origin of this feature in the insect — 

 evolution. 



60 



