88 



from which they could not escape. Hurrying back along 

 the passage until it reaches one of these breathing spots, 

 the larva goes into the pupal state, covering itself with a 

 brownish cocoon from which, in due course a new adult 

 Thalessa will emerge. 



Other species of Ichneumon Flies lay their eggs upon 

 various caterpillars before or .ifter they have entered the 

 pupal state. Very often the collector, carrying home a 

 cocoon of some prized moth, will be disheartened to find 

 that it has hatched out a fine familv of Ichneumon Flies. 



