INFLUENCE OF STARVATION OF INSECTS ON OFFSPRING. 33 



different in the two ~.-\es. Changes elicited in the structure of the 

 spermato/o.i by starvation of males are most probably qualita- 

 tive. 



4. The prolongation of larval life which had been noticed in the 

 starved male as well as female caterpillars could not be a- ;ied 



in their offspring. The pupal stage, on the contrary, whirh had 

 Lien much shortened in starved specimens underwent in the 

 priny of -t.irved females as well as in the offspri- starved 



in les an analogous change which leads to acceleration of nu-t.i- 

 morphosis. Such behavior of the progeny of starved specimen- 

 .supports the .mihor's former opinion that insect metamorphosis 

 is checked l>\ the secretoric function of the larval brain. 



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.<<! by an asterisk arc known to me only from abstracts. 



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