work and we are conscious that it is at the same time very obhging for us. 

 One of the most important questions of modern entomology is the develop- 

 ment of insects. We decided therefore, this problem to be the main and unique 

 subject of our symposium. We truly believe that this meeting of the outstan- 

 ding Czechoslovak and foreign entomologists will be welcomed and appreciated 

 also in other countries and that it will bring many positive results achieved 

 as луе11 as many positive suggestions for our common future work. 



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