364 Transactions of the Society. 



about as many eggs as were left in the skin. Some of the later 

 eggs laid were already segmented. 



I carefully counted the eggs in two typical cast skins. In the 

 first there were over 6,560 eggs, and in the second over 5,900. 

 Allowing for an equal number still in the uterus, this gives an 

 average of about 12,000 eggs for each worm. Probably the number 

 is even greater than this, as all the worms continued laying for 

 some weeks after castinfj their skins. 



By the beginning of May 1921 all but three or four worms had 

 died, and I left them with their eggs in the flower-pots. 



At the beginning of July T connected one of the pots with the 

 nest of L. fiavus referred to above, in the hope of tracing eventually 

 the method of infection. The ants readily took up their quarters 

 in the flower-pot. 



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