INTERRUPTED GROWTH OF ACRIDIDAE EGGS 153 



Shulov: We tried it on Dociostaurus and found that pierced 

 eggs imbibed water but the embryo did not develop and did 

 not turn around. 



Pener : I would like to refer to my experiments on Calliptamus 

 palaestinensis. The diapause eggs of this grasshopper were 

 treated by Slifer's method, some of them with mineral (paraffin) 

 oil and others with xylol, but development was not resumed. 

 The eggs imbibed some water, however, a distinct imbibition 

 was observed also in the untreated eggs during diapause. Some 

 months later the treated and untreated eggs were transferred to 

 low temperature and the majority resumed development. 



